import kexec-tools-2.0.23-9_1.el9_0
This commit is contained in:
CentOS Sources
Stepan Oksanichenko
commit
a3642bec34
3
.gitignore
vendored
Normal file
3
.gitignore
vendored
Normal file
@ -0,0 +1,3 @@
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||||
SOURCES/eppic-e8844d3.tar.gz
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SOURCES/kexec-tools-2.0.23.tar.xz
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||||
SOURCES/makedumpfile-1.7.0.tar.gz
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||||
3
.kexec-tools.metadata
Normal file
3
.kexec-tools.metadata
Normal file
@ -0,0 +1,3 @@
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80ac3f5e77d3c79883edadf14428734db4720009 SOURCES/eppic-e8844d3.tar.gz
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c9213672bbc9d08d25f6b1ea0cd9056d2e1c5e73 SOURCES/kexec-tools-2.0.23.tar.xz
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a931a40b80df204be1b02bfb502921cc618810fd SOURCES/makedumpfile-1.7.0.tar.gz
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36
SOURCES/60-kdump.install
Executable file
36
SOURCES/60-kdump.install
Executable file
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#!/usr/bin/bash
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COMMAND="$1"
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KERNEL_VERSION="$2"
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KDUMP_INITRD_DIR_ABS="$3"
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KERNEL_IMAGE="$4"
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if ! [[ ${KERNEL_INSTALL_MACHINE_ID-x} ]]; then
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exit 0
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fi
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if [[ -d "$KDUMP_INITRD_DIR_ABS" ]]; then
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KDUMP_INITRD="initrdkdump"
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else
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# If `KDUMP_BOOTDIR` is not writable, then the kdump
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# initrd must have been placed at `/var/lib/kdump`
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if [[ ! -w "/boot" ]]; then
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KDUMP_INITRD_DIR_ABS="/var/lib/kdump"
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else
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KDUMP_INITRD_DIR_ABS="/boot"
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fi
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KDUMP_INITRD="initramfs-${KERNEL_VERSION}kdump.img"
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fi
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ret=0
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case "$COMMAND" in
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add)
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# Do nothing, kdump initramfs is strictly host only
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# and managed by kdump service
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;;
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remove)
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rm -f -- "$KDUMP_INITRD_DIR_ABS/$KDUMP_INITRD"
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ret=$?
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;;
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esac
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exit $ret
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13
SOURCES/92-crashkernel.install
Executable file
13
SOURCES/92-crashkernel.install
Executable file
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#!/usr/bin/bash
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COMMAND="$1"
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KERNEL_VERSION="$2"
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KDUMP_INITRD_DIR_ABS="$3"
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KERNEL_IMAGE="$4"
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case "$COMMAND" in
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add)
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kdumpctl reset-crashkernel-for-installed_kernel "$KERNEL_VERSION"
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exit 0
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;;
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esac
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16
SOURCES/98-kexec.rules
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16
SOURCES/98-kexec.rules
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SUBSYSTEM=="cpu", ACTION=="add", GOTO="kdump_reload"
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SUBSYSTEM=="cpu", ACTION=="remove", GOTO="kdump_reload"
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SUBSYSTEM=="memory", ACTION=="online", GOTO="kdump_reload"
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SUBSYSTEM=="memory", ACTION=="offline", GOTO="kdump_reload"
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GOTO="kdump_reload_end"
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LABEL="kdump_reload"
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# If kdump is not loaded, calling kdump-udev-throttle will end up
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# doing nothing, but systemd-run will always generate extra logs for
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# each call, so trigger the kdump-udev-throttler only if kdump
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# service is active to avoid unnecessary logs
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RUN+="/bin/sh -c '/usr/bin/systemctl is-active kdump.service || exit 0; /usr/bin/systemd-run --quiet --no-block /usr/lib/udev/kdump-udev-throttler'"
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LABEL="kdump_reload_end"
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22
SOURCES/98-kexec.rules.ppc64
Normal file
22
SOURCES/98-kexec.rules.ppc64
Normal file
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SUBSYSTEM=="cpu", ACTION=="online", GOTO="kdump_reload_cpu"
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SUBSYSTEM=="memory", ACTION=="online", GOTO="kdump_reload_mem"
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SUBSYSTEM=="memory", ACTION=="offline", GOTO="kdump_reload_mem"
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GOTO="kdump_reload_end"
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# If kdump is not loaded, calling kdump-udev-throttle will end up
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# doing nothing, but systemd-run will always generate extra logs for
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# each call, so trigger the kdump-udev-throttler only if kdump
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# service is active to avoid unnecessary logs
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LABEL="kdump_reload_mem"
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RUN+="/bin/sh -c '/usr/bin/systemctl is-active kdump.service || exit 0; /usr/bin/systemd-run --quiet --no-block /usr/lib/udev/kdump-udev-throttler'"
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GOTO="kdump_reload_end"
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LABEL="kdump_reload_cpu"
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RUN+="/bin/sh -c '/usr/bin/systemctl is-active kdump.service || exit 0; ! test -f /sys/kernel/fadump_enabled || cat /sys/kernel/fadump_enabled | grep 0 || exit 0; /usr/bin/systemd-run --quiet --no-block /usr/lib/udev/kdump-udev-throttler'"
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LABEL="kdump_reload_end"
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119
SOURCES/crashkernel-howto.txt
Normal file
119
SOURCES/crashkernel-howto.txt
Normal file
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Introduction
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============
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This document describes features the kexec-tools package provides for setting
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and estimating the crashkernel value.
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Kdump lives in a pre-reserved chunk of memory, and the size of the reserved
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memory is specified by the `crashkernel=` kernel parameter. It's hard to
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estimate an accurate `crashkernel=` value, so it's always recommended to test
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kdump after you updated the `crashkernel=` value or changed the dump target.
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Default crashkernel value
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=========================
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Latest kexec-tools provides "kdumpctl get-default-crashkernel" to retrieve
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the default crashkernel value,
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$ echo $(kdumpctl get-default-crashkernel)
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1G-4G:192M,4G-64G:256M,64G-102400T:512M
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It will be taken as the default value of 'crashkernel=', you can use
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this value as a reference for setting crashkernel value manually.
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New installed system
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====================
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Anaconda is the OS installer which sets all the kernel boot cmdline on a newly
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installed system. If kdump is enabled during Anaconda installation, Anaconda
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will use the default crashkernel value as the default `crashkernel=` value on
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the newly installed system.
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Users can override the value during Anaconda installation manually.
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Auto update of crashkernel boot parameter
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=========================================
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A new release of kexec-tools could update the default crashkernel value.
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By default, kexec-tools would reset crashkernel to the new default value if it
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detects old default crashkernel value is used by installed kernels. If you don't
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want kexec-tools to update the old default crashkernel to the new default
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crashkernel, you can change auto_reset_crashkernel to no in kdump.conf.
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Supported Bootloaders
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---------------------
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This auto update only works with GRUB2 and ZIPL, as kexec-tools heavily depends
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on `grubby`. If other boot loaders are used, the user will have to update the
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`crashkernel=` value manually.
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Reset crashkernel to default value
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==================================
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kexec-tools only perform the auto update of crashkernel value when it can
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confirm the boot kernel's crashkernel value is using its corresponding default
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value and auto_reset_crashkernel=yes in kdump.conf. In other cases, the user
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can reset the crashkernel value by themselves.
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Reset using kdumpctl
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--------------------
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To make it easier to reset the `crashkernel=` kernel cmdline to this default
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value properly, `kdumpctl` also provides a sub-command:
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`kdumpctl reset-crashkernel [--kernel=path_to_kernel] [--reboot]`
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This command will read from the `crashkernel.default` file and reset
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bootloader's kernel cmdline to the default value. It will also update bootloader
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config if the bootloader has a standalone config file. User will have to reboot
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the machine after this command to make it take effect if --reboot is not specified.
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For ppc64le, an optional "[--fadump=[on|off|nocma]]" can also be specified to toggle
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FADump on/off.
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Reset manually
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--------------
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To reset the crashkernel value manually, it's recommended to use utils like
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`grubby`. A one liner script for resetting `crashkernel=` value of all installed
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kernels to current boot kernel's crashkernel.default` is:
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grubby --update-kernel ALL --args "crashkernel=$(kdumpctl get-default-crashkernel)"
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Estimate crashkernel
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====================
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The best way to estimate a usable crashkernel value is by testing kdump
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manually. And you can set crashkernel to a large value, then adjust the
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crashkernel value to an acceptable value gradually.
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`kdumpctl` also provides a sub-command for doing rough estimating without
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triggering kdump:
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`kdumpctl estimate`
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The output will be like this:
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```
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Encrypted kdump target requires extra memory, assuming using the keyslot with minimun memory requirement
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Reserved crashkernel: 256M
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Recommended crashkernel: 655M
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Kernel image size: 47M
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Kernel modules size: 12M
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Initramfs size: 19M
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Runtime reservation: 64M
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LUKS required size: 512M
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Large modules:
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xfs: 1892352
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nouveau: 2318336
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WARNING: Current crashkernel size is lower than recommended size 655M.
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```
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It will generate a summary report about the estimated memory consumption
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of each component of kdump. The value may not be accurate enough, but
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would be a good start for finding a suitable crashkernel value.
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65
SOURCES/dracut-early-kdump-module-setup.sh
Executable file
65
SOURCES/dracut-early-kdump-module-setup.sh
Executable file
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#!/bin/bash
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. /etc/sysconfig/kdump
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KDUMP_KERNEL=""
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KDUMP_INITRD=""
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check() {
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if [[ ! -f /etc/sysconfig/kdump ]] || [[ ! -f /lib/kdump/kdump-lib.sh ]] \
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|| [[ -n ${IN_KDUMP} ]]; then
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return 1
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fi
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return 255
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}
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depends() {
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echo "base shutdown"
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return 0
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}
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prepare_kernel_initrd() {
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. /lib/kdump/kdump-lib.sh
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prepare_kdump_bootinfo
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# $kernel is a variable from dracut
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if [[ $KDUMP_KERNELVER != "$kernel" ]]; then
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dwarn "Using kernel version '$KDUMP_KERNELVER' for early kdump," \
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"but the initramfs is generated for kernel version '$kernel'"
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fi
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}
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install() {
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prepare_kernel_initrd
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if [[ ! -f $KDUMP_KERNEL ]]; then
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derror "Could not find required kernel for earlykdump," \
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"earlykdump will not work!"
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return 1
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fi
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if [[ ! -f $KDUMP_INITRD ]]; then
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derror "Could not find required kdump initramfs for earlykdump," \
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"please ensure kdump initramfs is generated first," \
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"earlykdump will not work!"
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return 1
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fi
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inst_multiple tail find cut dirname hexdump
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inst_simple "/etc/sysconfig/kdump"
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inst_binary "/usr/sbin/kexec"
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inst_binary "/usr/bin/gawk" "/usr/bin/awk"
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inst_binary "/usr/bin/logger" "/usr/bin/logger"
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inst_binary "/usr/bin/printf" "/usr/bin/printf"
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inst_binary "/usr/bin/xargs" "/usr/bin/xargs"
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inst_script "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
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inst_script "/lib/kdump/kdump-lib-initramfs.sh" "/lib/kdump/kdump-lib-initramfs.sh"
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inst_script "/lib/kdump/kdump-logger.sh" "/lib/kdump-logger.sh"
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inst_hook cmdline 00 "$moddir/early-kdump.sh"
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inst_binary "$KDUMP_KERNEL"
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inst_binary "$KDUMP_INITRD"
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ln_r "$KDUMP_KERNEL" "/boot/kernel-earlykdump"
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ln_r "$KDUMP_INITRD" "/boot/initramfs-earlykdump"
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|
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chmod -x "${initdir}/$KDUMP_KERNEL"
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}
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84
SOURCES/dracut-early-kdump.sh
Executable file
84
SOURCES/dracut-early-kdump.sh
Executable file
@ -0,0 +1,84 @@
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#! /bin/sh
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KEXEC=/sbin/kexec
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standard_kexec_args="-p"
|
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|
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EARLY_KDUMP_INITRD=""
|
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EARLY_KDUMP_KERNEL=""
|
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EARLY_KDUMP_CMDLINE=""
|
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EARLY_KDUMP_KERNELVER=""
|
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EARLY_KEXEC_ARGS=""
|
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|
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. /etc/sysconfig/kdump
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. /lib/dracut-lib.sh
|
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. /lib/kdump-lib.sh
|
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. /lib/kdump-logger.sh
|
||||
|
||||
# initiate the kdump logger
|
||||
if ! dlog_init; then
|
||||
echo "failed to initiate the kdump logger."
|
||||
exit 1
|
||||
fi
|
||||
|
||||
prepare_parameters()
|
||||
{
|
||||
EARLY_KDUMP_CMDLINE=$(prepare_cmdline "${KDUMP_COMMANDLINE}" "${KDUMP_COMMANDLINE_REMOVE}" "${KDUMP_COMMANDLINE_APPEND}")
|
||||
EARLY_KDUMP_KERNEL="/boot/kernel-earlykdump"
|
||||
EARLY_KDUMP_INITRD="/boot/initramfs-earlykdump"
|
||||
}
|
||||
|
||||
early_kdump_load()
|
||||
{
|
||||
if ! check_kdump_feasibility; then
|
||||
return 1
|
||||
fi
|
||||
|
||||
if is_fadump_capable; then
|
||||
dwarn "WARNING: early kdump doesn't support fadump."
|
||||
return 1
|
||||
fi
|
||||
|
||||
if check_current_kdump_status; then
|
||||
return 1
|
||||
fi
|
||||
|
||||
prepare_parameters
|
||||
|
||||
EARLY_KEXEC_ARGS=$(prepare_kexec_args "${KEXEC_ARGS}")
|
||||
|
||||
if is_secure_boot_enforced; then
|
||||
dinfo "Secure Boot is enabled. Using kexec file based syscall."
|
||||
EARLY_KEXEC_ARGS="$EARLY_KEXEC_ARGS -s"
|
||||
fi
|
||||
|
||||
# Here, only output the messages, but do not save these messages
|
||||
# to a file because the target disk may not be mounted yet, the
|
||||
# earlykdump is too early.
|
||||
ddebug "earlykdump: $KEXEC ${EARLY_KEXEC_ARGS} $standard_kexec_args \
|
||||
--command-line=$EARLY_KDUMP_CMDLINE --initrd=$EARLY_KDUMP_INITRD \
|
||||
$EARLY_KDUMP_KERNEL"
|
||||
|
||||
if $KEXEC $EARLY_KEXEC_ARGS $standard_kexec_args \
|
||||
--command-line="$EARLY_KDUMP_CMDLINE" \
|
||||
--initrd=$EARLY_KDUMP_INITRD $EARLY_KDUMP_KERNEL; then
|
||||
dinfo "kexec: loaded early-kdump kernel"
|
||||
return 0
|
||||
else
|
||||
derror "kexec: failed to load early-kdump kernel"
|
||||
return 1
|
||||
fi
|
||||
}
|
||||
|
||||
set_early_kdump()
|
||||
{
|
||||
if getargbool 0 rd.earlykdump; then
|
||||
dinfo "early-kdump is enabled."
|
||||
early_kdump_load
|
||||
else
|
||||
dinfo "early-kdump is disabled."
|
||||
fi
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
set_early_kdump
|
||||
48
SOURCES/dracut-fadump-init-fadump.sh
Executable file
48
SOURCES/dracut-fadump-init-fadump.sh
Executable file
@ -0,0 +1,48 @@
|
||||
#!/bin/sh
|
||||
export PATH=/usr/bin:/usr/sbin
|
||||
export SYSTEMD_IN_INITRD=lenient
|
||||
|
||||
[ -e /proc/mounts ] ||
|
||||
(mkdir -p /proc && mount -t proc -o nosuid,noexec,nodev proc /proc)
|
||||
|
||||
grep -q '^sysfs /sys sysfs' /proc/mounts ||
|
||||
(mkdir -p /sys && mount -t sysfs -o nosuid,noexec,nodev sysfs /sys)
|
||||
|
||||
grep -q '^none / ' /proc/mounts || grep -q '^rootfs / ' /proc/mounts && ROOTFS_IS_RAMFS=1
|
||||
|
||||
if [ -f /proc/device-tree/rtas/ibm,kernel-dump ] || [ -f /proc/device-tree/ibm,opal/dump/mpipl-boot ]; then
|
||||
mkdir /newroot
|
||||
mount -t ramfs ramfs /newroot
|
||||
|
||||
if [ $ROOTFS_IS_RAMFS ]; then
|
||||
for FILE in $(ls -A /fadumproot/); do
|
||||
mv /fadumproot/$FILE /newroot/
|
||||
done
|
||||
exec switch_root /newroot /init
|
||||
else
|
||||
mkdir /newroot/sys /newroot/proc /newroot/dev /newroot/run /newroot/oldroot
|
||||
|
||||
grep -q '^devtmpfs /dev devtmpfs' /proc/mounts && mount --move /dev /newroot/dev
|
||||
grep -q '^tmpfs /run tmpfs' /proc/mounts && mount --move /run /newroot/run
|
||||
mount --move /sys /newroot/sys
|
||||
mount --move /proc /newroot/proc
|
||||
|
||||
cp --reflink=auto --sparse=auto --preserve=mode,timestamps,links -dfr /fadumproot/. /newroot/
|
||||
cd /newroot && pivot_root . oldroot
|
||||
|
||||
loop=1
|
||||
while [ $loop ]; do
|
||||
unset loop
|
||||
while read -r _ mp _; do
|
||||
case $mp in
|
||||
/oldroot/*) umount -d "$mp" && loop=1 ;;
|
||||
esac
|
||||
done </proc/mounts
|
||||
done
|
||||
umount -d -l oldroot
|
||||
|
||||
exec /init
|
||||
fi
|
||||
else
|
||||
exec /init.dracut
|
||||
fi
|
||||
23
SOURCES/dracut-fadump-module-setup.sh
Normal file
23
SOURCES/dracut-fadump-module-setup.sh
Normal file
@ -0,0 +1,23 @@
|
||||
#!/bin/bash
|
||||
|
||||
check() {
|
||||
return 255
|
||||
}
|
||||
|
||||
depends() {
|
||||
return 0
|
||||
}
|
||||
|
||||
install() {
|
||||
mv -f "$initdir/init" "$initdir/init.dracut"
|
||||
inst_script "$moddir/init-fadump.sh" /init
|
||||
chmod a+x "$initdir/init"
|
||||
|
||||
# Install required binaries for the init script (init-fadump.sh)
|
||||
inst_multiple sh modprobe grep mkdir mount
|
||||
if dracut_module_included "squash"; then
|
||||
inst_multiple cp pivot_root umount
|
||||
else
|
||||
inst_multiple ls mv switch_root
|
||||
fi
|
||||
}
|
||||
30
SOURCES/dracut-kdump-capture.service
Normal file
30
SOURCES/dracut-kdump-capture.service
Normal file
@ -0,0 +1,30 @@
|
||||
# This file is part of systemd.
|
||||
#
|
||||
# systemd is free software; you can redistribute it and/or modify it
|
||||
# under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation; either version 2.1 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
[Unit]
|
||||
Description=Kdump Vmcore Save Service
|
||||
After=initrd.target initrd-parse-etc.service sysroot.mount
|
||||
After=dracut-initqueue.service dracut-pre-mount.service dracut-mount.service dracut-pre-pivot.service
|
||||
Before=initrd-cleanup.service
|
||||
ConditionPathExists=/etc/initrd-release
|
||||
OnFailure=emergency.target
|
||||
OnFailureJobMode=isolate
|
||||
|
||||
[Service]
|
||||
Environment=DRACUT_SYSTEMD=1
|
||||
Environment=NEWROOT=/sysroot
|
||||
Type=oneshot
|
||||
ExecStart=/bin/kdump.sh
|
||||
StandardInput=null
|
||||
StandardOutput=syslog
|
||||
StandardError=syslog+console
|
||||
KillMode=process
|
||||
RemainAfterExit=yes
|
||||
|
||||
# Bash ignores SIGTERM, so we send SIGHUP instead, to ensure that bash
|
||||
# terminates cleanly.
|
||||
KillSignal=SIGHUP
|
||||
27
SOURCES/dracut-kdump-emergency.service
Normal file
27
SOURCES/dracut-kdump-emergency.service
Normal file
@ -0,0 +1,27 @@
|
||||
# This service will run the real kdump error handler code. Executing the
|
||||
# failure action configured in kdump.conf
|
||||
|
||||
[Unit]
|
||||
Description=Kdump Error Handler
|
||||
DefaultDependencies=no
|
||||
After=systemd-vconsole-setup.service
|
||||
Wants=systemd-vconsole-setup.service
|
||||
|
||||
[Service]
|
||||
Environment=HOME=/
|
||||
Environment=DRACUT_SYSTEMD=1
|
||||
Environment=NEWROOT=/sysroot
|
||||
WorkingDirectory=/
|
||||
ExecStart=/bin/kdump.sh --error-handler
|
||||
ExecStopPost=-/bin/rm -f -- /.console_lock
|
||||
Type=oneshot
|
||||
StandardInput=tty-force
|
||||
StandardOutput=inherit
|
||||
StandardError=inherit
|
||||
KillMode=process
|
||||
IgnoreSIGPIPE=no
|
||||
TasksMax=infinity
|
||||
|
||||
# Bash ignores SIGTERM, so we send SIGHUP instead, to ensure that bash
|
||||
# terminates cleanly.
|
||||
KillSignal=SIGHUP
|
||||
14
SOURCES/dracut-kdump-emergency.target
Normal file
14
SOURCES/dracut-kdump-emergency.target
Normal file
@ -0,0 +1,14 @@
|
||||
# This file is part of systemd.
|
||||
#
|
||||
# systemd is free software; you can redistribute it and/or modify it
|
||||
# under the terms of the GNU Lesser General Public License as published by
|
||||
# the Free Software Foundation; either version 2.1 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
[Unit]
|
||||
Description=Emergency Mode
|
||||
Documentation=man:systemd.special(7)
|
||||
Requires=emergency.service
|
||||
After=emergency.service
|
||||
AllowIsolate=yes
|
||||
IgnoreOnIsolate=yes
|
||||
583
SOURCES/dracut-kdump.sh
Executable file
583
SOURCES/dracut-kdump.sh
Executable file
@ -0,0 +1,583 @@
|
||||
#!/bin/sh
|
||||
#
|
||||
# The main kdump routine in capture kernel, bash may not be the
|
||||
# default shell. Any code added must be POSIX compliant.
|
||||
|
||||
. /lib/dracut-lib.sh
|
||||
. /lib/kdump-logger.sh
|
||||
. /lib/kdump-lib-initramfs.sh
|
||||
|
||||
#initiate the kdump logger
|
||||
if ! dlog_init; then
|
||||
echo "failed to initiate the kdump logger."
|
||||
exit 1
|
||||
fi
|
||||
|
||||
KDUMP_PATH="/var/crash"
|
||||
KDUMP_LOG_FILE="/run/initramfs/kexec-dmesg.log"
|
||||
CORE_COLLECTOR=""
|
||||
DEFAULT_CORE_COLLECTOR="makedumpfile -l --message-level 7 -d 31"
|
||||
DMESG_COLLECTOR="/sbin/vmcore-dmesg"
|
||||
FAILURE_ACTION="systemctl reboot -f"
|
||||
DATEDIR=$(date +%Y-%m-%d-%T)
|
||||
HOST_IP='127.0.0.1'
|
||||
DUMP_INSTRUCTION=""
|
||||
SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
|
||||
DD_BLKSIZE=512
|
||||
FINAL_ACTION="systemctl reboot -f"
|
||||
KDUMP_PRE=""
|
||||
KDUMP_POST=""
|
||||
NEWROOT="/sysroot"
|
||||
OPALCORE="/sys/firmware/opal/mpipl/core"
|
||||
KDUMP_CONF_PARSED="/tmp/kdump.conf.$$"
|
||||
|
||||
# POSIX doesn't have pipefail, only apply when using bash
|
||||
# shellcheck disable=SC3040
|
||||
[ -n "$BASH" ] && set -o pipefail
|
||||
|
||||
DUMP_RETVAL=0
|
||||
|
||||
kdump_read_conf > $KDUMP_CONF_PARSED
|
||||
|
||||
get_kdump_confs()
|
||||
{
|
||||
while read -r config_opt config_val; do
|
||||
# remove inline comments after the end of a directive.
|
||||
case "$config_opt" in
|
||||
path)
|
||||
KDUMP_PATH="$config_val"
|
||||
;;
|
||||
core_collector)
|
||||
[ -n "$config_val" ] && CORE_COLLECTOR="$config_val"
|
||||
;;
|
||||
sshkey)
|
||||
if [ -f "$config_val" ]; then
|
||||
SSH_KEY_LOCATION=$config_val
|
||||
fi
|
||||
;;
|
||||
kdump_pre)
|
||||
KDUMP_PRE="$config_val"
|
||||
;;
|
||||
kdump_post)
|
||||
KDUMP_POST="$config_val"
|
||||
;;
|
||||
fence_kdump_args)
|
||||
FENCE_KDUMP_ARGS="$config_val"
|
||||
;;
|
||||
fence_kdump_nodes)
|
||||
FENCE_KDUMP_NODES="$config_val"
|
||||
;;
|
||||
failure_action | default)
|
||||
case $config_val in
|
||||
shell)
|
||||
FAILURE_ACTION="kdump_emergency_shell"
|
||||
;;
|
||||
reboot)
|
||||
FAILURE_ACTION="systemctl reboot -f && exit"
|
||||
;;
|
||||
halt)
|
||||
FAILURE_ACTION="halt && exit"
|
||||
;;
|
||||
poweroff)
|
||||
FAILURE_ACTION="systemctl poweroff -f && exit"
|
||||
;;
|
||||
dump_to_rootfs)
|
||||
FAILURE_ACTION="dump_to_rootfs"
|
||||
;;
|
||||
esac
|
||||
;;
|
||||
final_action)
|
||||
case $config_val in
|
||||
reboot)
|
||||
FINAL_ACTION="systemctl reboot -f"
|
||||
;;
|
||||
halt)
|
||||
FINAL_ACTION="halt"
|
||||
;;
|
||||
poweroff)
|
||||
FINAL_ACTION="systemctl poweroff -f"
|
||||
;;
|
||||
esac
|
||||
;;
|
||||
esac
|
||||
done < "$KDUMP_CONF_PARSED"
|
||||
|
||||
if [ -z "$CORE_COLLECTOR" ]; then
|
||||
CORE_COLLECTOR="$DEFAULT_CORE_COLLECTOR"
|
||||
if is_ssh_dump_target || is_raw_dump_target; then
|
||||
CORE_COLLECTOR="$CORE_COLLECTOR -F"
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
# store the kexec kernel log to a file.
|
||||
save_log()
|
||||
{
|
||||
dmesg -T > $KDUMP_LOG_FILE
|
||||
|
||||
if command -v journalctl > /dev/null; then
|
||||
journalctl -ab >> $KDUMP_LOG_FILE
|
||||
fi
|
||||
chmod 600 $KDUMP_LOG_FILE
|
||||
}
|
||||
|
||||
# $1: dump path, must be a mount point
|
||||
dump_fs()
|
||||
{
|
||||
ddebug "dump_fs _mp=$1"
|
||||
|
||||
if ! is_mounted "$1"; then
|
||||
dinfo "dump path '$1' is not mounted, trying to mount..."
|
||||
if ! mount --target "$1"; then
|
||||
derror "failed to dump to '$1', it's not a mount point!"
|
||||
return 1
|
||||
fi
|
||||
fi
|
||||
|
||||
# Remove -F in makedumpfile case. We don't want a flat format dump here.
|
||||
case $CORE_COLLECTOR in
|
||||
*makedumpfile*)
|
||||
CORE_COLLECTOR=$(echo "$CORE_COLLECTOR" | sed -e "s/-F//g")
|
||||
;;
|
||||
esac
|
||||
|
||||
_dump_fs_path=$(echo "$1/$KDUMP_PATH/$HOST_IP-$DATEDIR/" | tr -s /)
|
||||
dinfo "saving to $_dump_fs_path"
|
||||
|
||||
# Only remount to read-write mode if the dump target is mounted read-only.
|
||||
_dump_mnt_op=$(get_mount_info OPTIONS target "$1" -f)
|
||||
case $_dump_mnt_op in
|
||||
ro*)
|
||||
dinfo "Remounting the dump target in rw mode."
|
||||
mount -o remount,rw "$1" || return 1
|
||||
;;
|
||||
esac
|
||||
|
||||
mkdir -p "$_dump_fs_path" || return 1
|
||||
|
||||
save_vmcore_dmesg_fs ${DMESG_COLLECTOR} "$_dump_fs_path"
|
||||
save_opalcore_fs "$_dump_fs_path"
|
||||
|
||||
dinfo "saving vmcore"
|
||||
$CORE_COLLECTOR /proc/vmcore "$_dump_fs_path/vmcore-incomplete"
|
||||
_dump_exitcode=$?
|
||||
if [ $_dump_exitcode -eq 0 ]; then
|
||||
mv "$_dump_fs_path/vmcore-incomplete" "$_dump_fs_path/vmcore"
|
||||
sync
|
||||
dinfo "saving vmcore complete"
|
||||
else
|
||||
derror "saving vmcore failed, exitcode:$_dump_exitcode"
|
||||
fi
|
||||
|
||||
dinfo "saving the $KDUMP_LOG_FILE to $_dump_fs_path/"
|
||||
save_log
|
||||
mv "$KDUMP_LOG_FILE" "$_dump_fs_path/"
|
||||
if [ $_dump_exitcode -ne 0 ]; then
|
||||
return 1
|
||||
fi
|
||||
|
||||
# improper kernel cmdline can cause the failure of echo, we can ignore this kind of failure
|
||||
return 0
|
||||
}
|
||||
|
||||
# $1: dmesg collector
|
||||
# $2: dump path
|
||||
save_vmcore_dmesg_fs()
|
||||
{
|
||||
dinfo "saving vmcore-dmesg.txt to $2"
|
||||
if $1 /proc/vmcore > "$2/vmcore-dmesg-incomplete.txt"; then
|
||||
mv "$2/vmcore-dmesg-incomplete.txt" "$2/vmcore-dmesg.txt"
|
||||
chmod 600 "$2/vmcore-dmesg.txt"
|
||||
|
||||
# Make sure file is on disk. There have been instances where later
|
||||
# saving vmcore failed and system rebooted without sync and there
|
||||
# was no vmcore-dmesg.txt available.
|
||||
sync
|
||||
dinfo "saving vmcore-dmesg.txt complete"
|
||||
else
|
||||
if [ -f "$2/vmcore-dmesg-incomplete.txt" ]; then
|
||||
chmod 600 "$2/vmcore-dmesg-incomplete.txt"
|
||||
fi
|
||||
derror "saving vmcore-dmesg.txt failed"
|
||||
fi
|
||||
}
|
||||
|
||||
# $1: dump path
|
||||
save_opalcore_fs()
|
||||
{
|
||||
if [ ! -f $OPALCORE ]; then
|
||||
# Check if we are on an old kernel that uses a different path
|
||||
if [ -f /sys/firmware/opal/core ]; then
|
||||
OPALCORE="/sys/firmware/opal/core"
|
||||
else
|
||||
return 0
|
||||
fi
|
||||
fi
|
||||
|
||||
dinfo "saving opalcore:$OPALCORE to $1/opalcore"
|
||||
if ! cp $OPALCORE "$1/opalcore"; then
|
||||
derror "saving opalcore failed"
|
||||
return 1
|
||||
fi
|
||||
|
||||
sync
|
||||
dinfo "saving opalcore complete"
|
||||
return 0
|
||||
}
|
||||
|
||||
dump_to_rootfs()
|
||||
{
|
||||
|
||||
if [ "$(systemctl status dracut-initqueue | sed -n "s/^\s*Active: \(\S*\)\s.*$/\1/p")" = "inactive" ]; then
|
||||
dinfo "Trying to bring up initqueue for rootfs mount"
|
||||
systemctl start dracut-initqueue
|
||||
fi
|
||||
|
||||
dinfo "Clean up dead systemd services"
|
||||
systemctl cancel
|
||||
dinfo "Waiting for rootfs mount, will timeout after 90 seconds"
|
||||
systemctl start --no-block sysroot.mount
|
||||
|
||||
_loop=0
|
||||
while [ $_loop -lt 90 ] && ! is_mounted /sysroot; do
|
||||
sleep 1
|
||||
_loop=$((_loop + 1))
|
||||
done
|
||||
|
||||
if ! is_mounted /sysroot; then
|
||||
derror "Failed to mount rootfs"
|
||||
return
|
||||
fi
|
||||
|
||||
ddebug "NEWROOT=$NEWROOT"
|
||||
dump_fs $NEWROOT
|
||||
}
|
||||
|
||||
kdump_emergency_shell()
|
||||
{
|
||||
ddebug "Switching to kdump emergency shell..."
|
||||
|
||||
[ -f /etc/profile ] && . /etc/profile
|
||||
export PS1='kdump:${PWD}# '
|
||||
|
||||
. /lib/dracut-lib.sh
|
||||
if [ -f /dracut-state.sh ]; then
|
||||
. /dracut-state.sh 2> /dev/null
|
||||
fi
|
||||
|
||||
source_conf /etc/conf.d
|
||||
|
||||
type plymouth > /dev/null 2>&1 && plymouth quit
|
||||
|
||||
source_hook "emergency"
|
||||
while read -r _tty rest; do
|
||||
(
|
||||
echo
|
||||
echo
|
||||
echo 'Entering kdump emergency mode.'
|
||||
echo 'Type "journalctl" to view system logs.'
|
||||
echo 'Type "rdsosreport" to generate a sosreport, you can then'
|
||||
echo 'save it elsewhere and attach it to a bug report.'
|
||||
echo
|
||||
echo
|
||||
) > "/dev/$_tty"
|
||||
done < /proc/consoles
|
||||
sh -i -l
|
||||
/bin/rm -f -- /.console_lock
|
||||
}
|
||||
|
||||
do_failure_action()
|
||||
{
|
||||
dinfo "Executing failure action $FAILURE_ACTION"
|
||||
eval $FAILURE_ACTION
|
||||
}
|
||||
|
||||
do_final_action()
|
||||
{
|
||||
dinfo "Executing final action $FINAL_ACTION"
|
||||
eval $FINAL_ACTION
|
||||
}
|
||||
|
||||
do_dump()
|
||||
{
|
||||
eval $DUMP_INSTRUCTION
|
||||
_ret=$?
|
||||
|
||||
if [ $_ret -ne 0 ]; then
|
||||
derror "saving vmcore failed"
|
||||
fi
|
||||
|
||||
return $_ret
|
||||
}
|
||||
|
||||
do_kdump_pre()
|
||||
{
|
||||
if [ -n "$KDUMP_PRE" ]; then
|
||||
"$KDUMP_PRE"
|
||||
_ret=$?
|
||||
if [ $_ret -ne 0 ]; then
|
||||
derror "$KDUMP_PRE exited with $_ret status"
|
||||
return $_ret
|
||||
fi
|
||||
fi
|
||||
|
||||
# if any script fails, it just raises warning and continues
|
||||
if [ -d /etc/kdump/pre.d ]; then
|
||||
for file in /etc/kdump/pre.d/*; do
|
||||
"$file"
|
||||
_ret=$?
|
||||
if [ $_ret -ne 0 ]; then
|
||||
derror "$file exited with $_ret status"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
return 0
|
||||
}
|
||||
|
||||
do_kdump_post()
|
||||
{
|
||||
if [ -d /etc/kdump/post.d ]; then
|
||||
for file in /etc/kdump/post.d/*; do
|
||||
"$file" "$1"
|
||||
_ret=$?
|
||||
if [ $_ret -ne 0 ]; then
|
||||
derror "$file exited with $_ret status"
|
||||
fi
|
||||
done
|
||||
fi
|
||||
|
||||
if [ -n "$KDUMP_POST" ]; then
|
||||
"$KDUMP_POST" "$1"
|
||||
_ret=$?
|
||||
if [ $_ret -ne 0 ]; then
|
||||
derror "$KDUMP_POST exited with $_ret status"
|
||||
fi
|
||||
fi
|
||||
}
|
||||
|
||||
# $1: block target, eg. /dev/sda
|
||||
dump_raw()
|
||||
{
|
||||
[ -b "$1" ] || return 1
|
||||
|
||||
dinfo "saving to raw disk $1"
|
||||
|
||||
if ! echo "$CORE_COLLECTOR" | grep -q makedumpfile; then
|
||||
_src_size=$(stat --format %s /proc/vmcore)
|
||||
_src_size_mb=$((_src_size / 1048576))
|
||||
/kdumpscripts/monitor_dd_progress $_src_size_mb &
|
||||
fi
|
||||
|
||||
dinfo "saving vmcore"
|
||||
$CORE_COLLECTOR /proc/vmcore | dd of="$1" bs=$DD_BLKSIZE >> /tmp/dd_progress_file 2>&1 || return 1
|
||||
sync
|
||||
|
||||
dinfo "saving vmcore complete"
|
||||
return 0
|
||||
}
|
||||
|
||||
# $1: ssh key file
|
||||
# $2: ssh address in <user>@<host> format
|
||||
dump_ssh()
|
||||
{
|
||||
_ret=0
|
||||
_ssh_opt="-i $1 -o BatchMode=yes -o StrictHostKeyChecking=yes"
|
||||
_ssh_dir="$KDUMP_PATH/$HOST_IP-$DATEDIR"
|
||||
if is_ipv6_address "$2"; then
|
||||
_scp_address=${2%@*}@"[${2#*@}]"
|
||||
else
|
||||
_scp_address=$2
|
||||
fi
|
||||
|
||||
dinfo "saving to $2:$_ssh_dir"
|
||||
|
||||
cat /var/lib/random-seed > /dev/urandom
|
||||
ssh -q $_ssh_opt "$2" mkdir -p "$_ssh_dir" || return 1
|
||||
|
||||
save_vmcore_dmesg_ssh "$DMESG_COLLECTOR" "$_ssh_dir" "$_ssh_opt" "$2"
|
||||
dinfo "saving vmcore"
|
||||
|
||||
save_opalcore_ssh "$_ssh_dir" "$_ssh_opt" "$2" "$_scp_address"
|
||||
|
||||
if [ "${CORE_COLLECTOR%%[[:blank:]]*}" = "scp" ]; then
|
||||
scp -q $_ssh_opt /proc/vmcore "$_scp_address:$_ssh_dir/vmcore-incomplete"
|
||||
_ret=$?
|
||||
_vmcore="vmcore"
|
||||
else
|
||||
$CORE_COLLECTOR /proc/vmcore | ssh $_ssh_opt "$2" "umask 0077 && dd bs=512 of='$_ssh_dir/vmcore-incomplete'"
|
||||
_ret=$?
|
||||
_vmcore="vmcore.flat"
|
||||
fi
|
||||
|
||||
if [ $_ret -eq 0 ]; then
|
||||
ssh $_ssh_opt "$2" "mv '$_ssh_dir/vmcore-incomplete' '$_ssh_dir/$_vmcore'"
|
||||
_ret=$?
|
||||
if [ $_ret -ne 0 ]; then
|
||||
derror "moving vmcore failed, exitcode:$_ret"
|
||||
else
|
||||
dinfo "saving vmcore complete"
|
||||
fi
|
||||
else
|
||||
derror "saving vmcore failed, exitcode:$_ret"
|
||||
fi
|
||||
|
||||
dinfo "saving the $KDUMP_LOG_FILE to $2:$_ssh_dir/"
|
||||
save_log
|
||||
if ! scp -q $_ssh_opt $KDUMP_LOG_FILE "$_scp_address:$_ssh_dir/"; then
|
||||
derror "saving log file failed, _exitcode:$_ret"
|
||||
fi
|
||||
|
||||
return $_ret
|
||||
}
|
||||
|
||||
# $1: dump path
|
||||
# $2: ssh opts
|
||||
# $3: ssh address in <user>@<host> format
|
||||
# $4: scp address, similar with ssh address but IPv6 addresses are quoted
|
||||
save_opalcore_ssh()
|
||||
{
|
||||
if [ ! -f $OPALCORE ]; then
|
||||
# Check if we are on an old kernel that uses a different path
|
||||
if [ -f /sys/firmware/opal/core ]; then
|
||||
OPALCORE="/sys/firmware/opal/core"
|
||||
else
|
||||
return 0
|
||||
fi
|
||||
fi
|
||||
|
||||
dinfo "saving opalcore:$OPALCORE to $3:$1"
|
||||
|
||||
if ! scp $2 $OPALCORE "$4:$1/opalcore-incomplete"; then
|
||||
derror "saving opalcore failed"
|
||||
return 1
|
||||
fi
|
||||
|
||||
ssh $2 "$3" mv "$1/opalcore-incomplete" "$1/opalcore"
|
||||
dinfo "saving opalcore complete"
|
||||
return 0
|
||||
}
|
||||
|
||||
# $1: dmesg collector
|
||||
# $2: dump path
|
||||
# $3: ssh opts
|
||||
# $4: ssh address in <user>@<host> format
|
||||
save_vmcore_dmesg_ssh()
|
||||
{
|
||||
dinfo "saving vmcore-dmesg.txt to $4:$2"
|
||||
if $1 /proc/vmcore | ssh $3 "$4" "umask 0077 && dd of='$2/vmcore-dmesg-incomplete.txt'"; then
|
||||
ssh -q $3 "$4" mv "$2/vmcore-dmesg-incomplete.txt" "$2/vmcore-dmesg.txt"
|
||||
dinfo "saving vmcore-dmesg.txt complete"
|
||||
else
|
||||
derror "saving vmcore-dmesg.txt failed"
|
||||
fi
|
||||
}
|
||||
|
||||
get_host_ip()
|
||||
{
|
||||
if is_nfs_dump_target || is_ssh_dump_target; then
|
||||
kdumpnic=$(getarg kdumpnic=)
|
||||
if [ -z "$kdumpnic" ]; then
|
||||
derror "failed to get kdumpnic!"
|
||||
return 1
|
||||
fi
|
||||
if ! kdumphost=$(ip addr show dev "$kdumpnic" | grep '[ ]*inet'); then
|
||||
derror "wrong kdumpnic: $kdumpnic"
|
||||
return 1
|
||||
fi
|
||||
kdumphost=$(echo "$kdumphost" | head -n 1 | awk '{print $2}')
|
||||
kdumphost="${kdumphost%%/*}"
|
||||
if [ -z "$kdumphost" ]; then
|
||||
derror "wrong kdumpnic: $kdumpnic"
|
||||
return 1
|
||||
fi
|
||||
HOST_IP=$kdumphost
|
||||
fi
|
||||
return 0
|
||||
}
|
||||
|
||||
read_kdump_confs()
|
||||
{
|
||||
if [ ! -f "$KDUMP_CONFIG_FILE" ]; then
|
||||
derror "$KDUMP_CONFIG_FILE not found"
|
||||
return
|
||||
fi
|
||||
|
||||
get_kdump_confs
|
||||
|
||||
# rescan for add code for dump target
|
||||
while read -r config_opt config_val; do
|
||||
# remove inline comments after the end of a directive.
|
||||
case "$config_opt" in
|
||||
dracut_args)
|
||||
config_val=$(get_dracut_args_target "$config_val")
|
||||
if [ -n "$config_val" ]; then
|
||||
config_val=$(get_mntpoint_from_target "$config_val")
|
||||
DUMP_INSTRUCTION="dump_fs $config_val"
|
||||
fi
|
||||
;;
|
||||
ext[234] | xfs | btrfs | minix | nfs)
|
||||
config_val=$(get_mntpoint_from_target "$config_val")
|
||||
DUMP_INSTRUCTION="dump_fs $config_val"
|
||||
;;
|
||||
raw)
|
||||
DUMP_INSTRUCTION="dump_raw $config_val"
|
||||
;;
|
||||
ssh)
|
||||
DUMP_INSTRUCTION="dump_ssh $SSH_KEY_LOCATION $config_val"
|
||||
;;
|
||||
esac
|
||||
done < "$KDUMP_CONF_PARSED"
|
||||
}
|
||||
|
||||
fence_kdump_notify()
|
||||
{
|
||||
if [ -n "$FENCE_KDUMP_NODES" ]; then
|
||||
# shellcheck disable=SC2086
|
||||
$FENCE_KDUMP_SEND $FENCE_KDUMP_ARGS $FENCE_KDUMP_NODES &
|
||||
fi
|
||||
}
|
||||
|
||||
if [ "$1" = "--error-handler" ]; then
|
||||
get_kdump_confs
|
||||
do_failure_action
|
||||
do_final_action
|
||||
|
||||
exit $?
|
||||
fi
|
||||
|
||||
# continue here only if we have to save dump.
|
||||
if [ -f /etc/fadump.initramfs ] && [ ! -f /proc/device-tree/rtas/ibm,kernel-dump ] && [ ! -f /proc/device-tree/ibm,opal/dump/mpipl-boot ]; then
|
||||
exit 0
|
||||
fi
|
||||
|
||||
read_kdump_confs
|
||||
fence_kdump_notify
|
||||
|
||||
if ! get_host_ip; then
|
||||
derror "get_host_ip exited with non-zero status!"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ -z "$DUMP_INSTRUCTION" ]; then
|
||||
DUMP_INSTRUCTION="dump_fs $NEWROOT"
|
||||
fi
|
||||
|
||||
if ! do_kdump_pre; then
|
||||
derror "kdump_pre script exited with non-zero status!"
|
||||
do_final_action
|
||||
# During systemd service to reboot the machine, stop this shell script running
|
||||
exit 1
|
||||
fi
|
||||
make_trace_mem "kdump saving vmcore" '1:shortmem' '2+:mem' '3+:slab'
|
||||
do_dump
|
||||
DUMP_RETVAL=$?
|
||||
|
||||
if ! do_kdump_post $DUMP_RETVAL; then
|
||||
derror "kdump_post script exited with non-zero status!"
|
||||
fi
|
||||
|
||||
if [ $DUMP_RETVAL -ne 0 ]; then
|
||||
exit 1
|
||||
fi
|
||||
|
||||
do_final_action
|
||||
1090
SOURCES/dracut-module-setup.sh
Executable file
1090
SOURCES/dracut-module-setup.sh
Executable file
File diff suppressed because it is too large
Load Diff
28
SOURCES/dracut-monitor_dd_progress
Normal file
28
SOURCES/dracut-monitor_dd_progress
Normal file
@ -0,0 +1,28 @@
|
||||
#!/bin/sh
|
||||
|
||||
SRC_FILE_MB=$1
|
||||
|
||||
while true
|
||||
do
|
||||
DD_PID=`pidof dd`
|
||||
if [ -n "$DD_PID" ]; then
|
||||
break
|
||||
fi
|
||||
done
|
||||
|
||||
while true
|
||||
do
|
||||
sleep 5
|
||||
if [ ! -d /proc/$DD_PID ]; then
|
||||
break
|
||||
fi
|
||||
|
||||
kill -s USR1 $DD_PID
|
||||
CURRENT_SIZE=`tail -n 1 /tmp/dd_progress_file | sed "s/[^0-9].*//g"`
|
||||
[ -n "$CURRENT_SIZE" ] && {
|
||||
CURRENT_MB=$(($CURRENT_SIZE / 1048576))
|
||||
echo -e "Copied $CURRENT_MB MB / $SRC_FILE_MB MB\r"
|
||||
}
|
||||
done
|
||||
|
||||
rm -f /tmp/dd_progress_file
|
||||
95
SOURCES/early-kdump-howto.txt
Normal file
95
SOURCES/early-kdump-howto.txt
Normal file
@ -0,0 +1,95 @@
|
||||
Early Kdump HOWTO
|
||||
|
||||
Introduction
|
||||
------------
|
||||
|
||||
Early kdump is a mechanism to make kdump operational earlier than normal kdump
|
||||
service. The kdump service starts early enough for general crash cases, but
|
||||
there are some cases where it has no chance to make kdump operational in boot
|
||||
sequence, such as detecting devices and starting early services. If you hit
|
||||
such a case, early kdump may allow you to get more information of it.
|
||||
|
||||
Early kdump is implemented as a dracut module. It adds a kernel (vmlinuz) and
|
||||
initramfs for kdump to your system's initramfs in order to load them as early
|
||||
as possible. After that, if you provide "rd.earlykdump" in kernel command line,
|
||||
then in the initramfs, early kdump will load those files like the normal kdump
|
||||
service. This is disabled by default.
|
||||
|
||||
For the normal kdump service, it can check whether the early kdump has loaded
|
||||
the crash kernel and initramfs. It has no conflict with the early kdump.
|
||||
|
||||
How to configure early kdump
|
||||
----------------------------
|
||||
|
||||
We assume if you're reading this document, you should already have kexec-tools
|
||||
installed.
|
||||
|
||||
You can rebuild the initramfs with earlykdump support with below steps:
|
||||
|
||||
1. start kdump service to make sure kdump initramfs is created.
|
||||
|
||||
# systemctl start kdump
|
||||
|
||||
NOTE: If a crash occurs during boot process, early kdump captures a vmcore
|
||||
and reboot the system by default, so the system might go into crash loop.
|
||||
You can avoid such a crash loop by adding the following settings, which
|
||||
power off the system after dump capturing, to kdump.conf in advance:
|
||||
|
||||
final_action poweroff
|
||||
failure_action poweroff
|
||||
|
||||
For the failure_action, you can choose anything other than "reboot".
|
||||
|
||||
2. rebuild system initramfs with earlykdump support.
|
||||
|
||||
# dracut --force --add earlykdump
|
||||
|
||||
NOTE: Recommend to backup the original system initramfs before performing
|
||||
this step to put it back if something happens during boot-up.
|
||||
|
||||
3. add rd.earlykdump in grub kernel command line.
|
||||
|
||||
After making said changes, reboot your system to take effect. Of course, if you
|
||||
want to disable early kdump, you can simply remove "rd.earlykdump" from kernel
|
||||
boot parameters in grub, and reboot system like above.
|
||||
|
||||
Once the boot is completed, you can check the status of the early kdump support
|
||||
on the command prompt:
|
||||
|
||||
# journalctl -b | grep early-kdump
|
||||
|
||||
Then, you will see some useful logs, for example:
|
||||
|
||||
- if early kdump is successful.
|
||||
|
||||
Mar 09 09:57:56 localhost dracut-cmdline[190]: early-kdump is enabled.
|
||||
Mar 09 09:57:56 localhost dracut-cmdline[190]: kexec: loaded early-kdump kernel
|
||||
|
||||
- if early kdump is disabled.
|
||||
|
||||
Mar 09 10:02:47 localhost dracut-cmdline[189]: early-kdump is disabled.
|
||||
|
||||
Notes
|
||||
-----
|
||||
|
||||
- The size of early kdump initramfs will be large because it includes vmlinuz
|
||||
and kdump initramfs.
|
||||
|
||||
- Early kdump inherits the settings of normal kdump, so any changes that
|
||||
caused normal kdump rebuilding also require rebuilding the system initramfs
|
||||
to make sure that the changes take effect for early kdump. Therefore, after
|
||||
the rebuilding of kdump initramfs is completed, provide a prompt message to
|
||||
tell the fact.
|
||||
|
||||
- If you install an updated kernel and reboot the system with it, the early
|
||||
kdump will be disabled by default. To enable it with the new kernel, you
|
||||
need to take the above steps again.
|
||||
|
||||
Limitation
|
||||
----------
|
||||
|
||||
- At present, early kdump doesn't support fadump.
|
||||
|
||||
- Early kdump loads a crash kernel and initramfs at the beginning of the
|
||||
process in system's initramfs, so a crash at earlier than that (e.g. in
|
||||
kernel initialization) cannot be captured even with the early kdump.
|
||||
355
SOURCES/fadump-howto.txt
Normal file
355
SOURCES/fadump-howto.txt
Normal file
@ -0,0 +1,355 @@
|
||||
Firmware assisted dump (fadump) HOWTO
|
||||
|
||||
Introduction
|
||||
|
||||
Firmware assisted dump is a new feature in the 3.4 mainline kernel supported
|
||||
only on powerpc architecture. The goal of firmware-assisted dump is to enable
|
||||
the dump of a crashed system, and to do so from a fully-reset system, and to
|
||||
minimize the total elapsed time until the system is back in production use. A
|
||||
complete documentation on implementation can be found at
|
||||
Documentation/powerpc/firmware-assisted-dump.txt in upstream linux kernel tree
|
||||
from 3.4 version and above.
|
||||
|
||||
Please note that the firmware-assisted dump feature is only available on Power6
|
||||
and above systems with recent firmware versions.
|
||||
|
||||
Overview
|
||||
|
||||
Fadump
|
||||
|
||||
Fadump is a robust kernel crash dumping mechanism to get reliable kernel crash
|
||||
dump with assistance from firmware. This approach does not use kexec, instead
|
||||
firmware assists in booting the kdump kernel while preserving memory contents.
|
||||
Unlike kdump, the system is fully reset, and loaded with a fresh copy of the
|
||||
kernel. In particular, PCI and I/O devices are reinitialized and are in a
|
||||
clean, consistent state. This second kernel, often called a capture kernel,
|
||||
boots with very little memory and captures the dump image.
|
||||
|
||||
The first kernel registers the sections of memory with the Power firmware for
|
||||
dump preservation during OS initialization. These registered sections of memory
|
||||
are reserved by the first kernel during early boot. When a system crashes, the
|
||||
Power firmware fully resets the system, preserves all the system memory
|
||||
contents, save the low memory (boot memory of size larger of 5% of system
|
||||
RAM or 256MB) of RAM to the previous registered region. It will also save
|
||||
system registers, and hardware PTE's.
|
||||
|
||||
Fadump is supported only on ppc64 platform. The standard kernel and capture
|
||||
kernel are one and the same on ppc64.
|
||||
|
||||
If you're reading this document, you should already have kexec-tools
|
||||
installed. If not, you install it via the following command:
|
||||
|
||||
# yum install kexec-tools
|
||||
|
||||
Fadump Operational Flow:
|
||||
|
||||
Like kdump, fadump also exports the ELF formatted kernel crash dump through
|
||||
/proc/vmcore. Hence existing kdump infrastructure can be used to capture fadump
|
||||
vmcore. The idea is to keep the functionality transparent to end user. From
|
||||
user perspective there is no change in the way kdump init script works.
|
||||
|
||||
However, unlike kdump, fadump does not pre-load kdump kernel and initrd into
|
||||
reserved memory, instead it always uses default OS initrd during second boot
|
||||
after crash. Hence, for fadump, we rebuild the new kdump initrd and replace it
|
||||
with default initrd. Before replacing existing default initrd we take a backup
|
||||
of original default initrd for user's reference. The dracut package has been
|
||||
enhanced to rebuild the default initrd with vmcore capture steps. The initrd
|
||||
image is rebuilt as per the configuration in /etc/kdump.conf file.
|
||||
|
||||
The control flow of fadump works as follows:
|
||||
01. System panics.
|
||||
02. At the crash, kernel informs power firmware that kernel has crashed.
|
||||
03. Firmware takes the control and reboots the entire system preserving
|
||||
only the memory (resets all other devices).
|
||||
04. The reboot follows the normal booting process (non-kexec).
|
||||
05. The boot loader loads the default kernel and initrd from /boot
|
||||
06. The default initrd loads and runs /init
|
||||
07. dracut-kdump.sh script present in fadump aware default initrd checks if
|
||||
'/proc/device-tree/rtas/ibm,kernel-dump' file exists before executing
|
||||
steps to capture vmcore.
|
||||
(This check will help to bypass the vmcore capture steps during normal boot
|
||||
process.)
|
||||
09. Captures dump according to /etc/kdump.conf
|
||||
10. Is dump capture successful (yes goto 12, no goto 11)
|
||||
11. Perform the failure action specified in /etc/kdump.conf
|
||||
(The default failure action is reboot, if unspecified)
|
||||
12. Perform the final action specified in /etc/kdump.conf
|
||||
(The default final action is reboot, if unspecified)
|
||||
|
||||
|
||||
How to configure fadump:
|
||||
|
||||
Again, we assume if you're reading this document, you should already have
|
||||
kexec-tools installed. If not, you install it via the following command:
|
||||
|
||||
# yum install kexec-tools
|
||||
|
||||
Make the kernel to be configured with FADump as the default boot entry, if
|
||||
it isn't already:
|
||||
|
||||
# grubby --set-default=/boot/vmlinuz-<kver>
|
||||
|
||||
Boot into the kernel to be configured for FADump. To be able to do much of
|
||||
anything interesting in the way of debug analysis, you'll also need to install
|
||||
the kernel-debuginfo package, of the same arch as your running kernel, and the
|
||||
crash utility:
|
||||
|
||||
# yum --enablerepo=\*debuginfo install kernel-debuginfo.$(uname -m) crash
|
||||
|
||||
Next up, we need to modify some boot parameters to enable firmware assisted
|
||||
dump. With the help of grubby, it's very easy to append "fadump=on" to the end
|
||||
of your kernel boot parameters. To reserve the appropriate amount of memory
|
||||
for boot memory preservation, pass 'crashkernel=X' kernel cmdline parameter.
|
||||
For the recommended value of X, see 'FADump Memory Requirements' section.
|
||||
|
||||
# grubby --args="fadump=on crashkernel=6G" --update-kernel=/boot/vmlinuz-`uname -r`
|
||||
|
||||
By default, FADump reserved memory will be initialized as CMA area to make the
|
||||
memory available through CMA allocator on the production kernel. We can opt out
|
||||
of this, making reserved memory unavailable to production kernel, by booting the
|
||||
linux kernel with 'fadump=nocma' instead of 'fadump=on'.
|
||||
|
||||
The term 'boot memory' means size of the low memory chunk that is required for
|
||||
a kernel to boot successfully when booted with restricted memory. By default,
|
||||
the boot memory size will be the larger of 5% of system RAM or 256MB.
|
||||
Alternatively, user can also specify boot memory size through boot parameter
|
||||
'fadump_reserve_mem=' which will override the default calculated size. Use this
|
||||
option if default boot memory size is not sufficient for second kernel to boot
|
||||
successfully.
|
||||
|
||||
After making said changes, reboot your system, so that the specified memory is
|
||||
reserved and left untouched by the normal system. Take note that the output of
|
||||
'free -m' will show X MB less memory than without this parameter, which is
|
||||
expected. If you see OOM (Out Of Memory) error messages while loading capture
|
||||
kernel, then you should bump up the memory reservation size.
|
||||
|
||||
Now that you've got that reserved memory region set up, you want to turn on
|
||||
the kdump init script:
|
||||
|
||||
# systemctl enable kdump.service
|
||||
|
||||
Then, start up kdump as well:
|
||||
|
||||
# systemctl start kdump.service
|
||||
|
||||
This should turn on the firmware assisted functionality in kernel by
|
||||
echo'ing 1 to /sys/kernel/fadump_registered, leaving the system ready
|
||||
to capture a vmcore upon crashing. For journaling filesystems like XFS an
|
||||
additional step is required to ensure bootloader does not pick the
|
||||
older initrd (without vmcore capture scripts):
|
||||
|
||||
* If /boot is a separate partition, run the below commands as the root user,
|
||||
or as a user with CAP_SYS_ADMIN rights:
|
||||
|
||||
# fsfreeze -f
|
||||
# fsfreeze -u
|
||||
|
||||
* If /boot is not a separate partition, reboot the system.
|
||||
|
||||
After reboot check if the kdump service is up and running with:
|
||||
|
||||
# systemctl status kdump.service
|
||||
|
||||
To test out whether FADump is configured properly, you can force-crash your
|
||||
system by echo'ing a 'c' into /proc/sysrq-trigger:
|
||||
|
||||
# echo c > /proc/sysrq-trigger
|
||||
|
||||
You should see some panic output, followed by the system reset and booting into
|
||||
fresh copy of kernel. When default initrd loads and runs /init, vmcore should
|
||||
be copied out to disk (by default, in /var/crash/<YYYY.MM.DD-HH:MM:SS>/vmcore),
|
||||
then the system rebooted back into your normal kernel.
|
||||
|
||||
Once back to your normal kernel, you can use the previously installed crash
|
||||
kernel in conjunction with the previously installed kernel-debuginfo to
|
||||
perform postmortem analysis:
|
||||
|
||||
# crash /usr/lib/debug/lib/modules/2.6.17-1.2621.el5/vmlinux
|
||||
/var/crash/2006-08-23-15:34/vmcore
|
||||
|
||||
crash> bt
|
||||
|
||||
and so on...
|
||||
|
||||
Saving vmcore-dmesg.txt
|
||||
-----------------------
|
||||
Kernel log bufferes are one of the most important information available
|
||||
in vmcore. Now before saving vmcore, kernel log bufferes are extracted
|
||||
from /proc/vmcore and saved into a file vmcore-dmesg.txt. After
|
||||
vmcore-dmesg.txt, vmcore is saved. Destination disk and directory for
|
||||
vmcore-dmesg.txt is same as vmcore. Note that kernel log buffers will
|
||||
not be available if dump target is raw device.
|
||||
|
||||
FADump Memory Requirements:
|
||||
|
||||
System Memory Recommended memory
|
||||
--------------------- ----------------------
|
||||
4 GB - 16 GB : 768 MB
|
||||
16 GB - 64 GB : 1024 MB
|
||||
64 GB - 128 GB : 2 GB
|
||||
128 GB - 1 TB : 4 GB
|
||||
1 TB - 2 TB : 6 GB
|
||||
2 TB - 4 TB : 12 GB
|
||||
4 TB - 8 TB : 20 GB
|
||||
8 TB - 16 TB : 36 GB
|
||||
16 TB - 32 TB : 64 GB
|
||||
32 TB - 64 TB : 128 GB
|
||||
64 TB & above : 180 GB
|
||||
|
||||
Things to remember:
|
||||
|
||||
1) The memory required to boot capture Kernel is a moving target that depends
|
||||
on many factors like hardware attached to the system, kernel and modules in
|
||||
use, packages installed and services enabled, there is no one-size-fits-all.
|
||||
But the above recommendations are based on system memory. So, the above
|
||||
recommendations for FADump come with a few assumptions, based on available
|
||||
system memory, about the resources the system could have. So, please take
|
||||
the recommendations with a pinch of salt and remember to try capturing dump
|
||||
a few times to confirm that the system is configured successfully with dump
|
||||
capturing support.
|
||||
|
||||
2) Though the memory requirements for FADump seem high, this memory is not
|
||||
completely set aside but made available for userspace applications to use,
|
||||
through the CMA allocator.
|
||||
|
||||
3) As the same initrd is used for booting production kernel as well as capture
|
||||
kernel and with dump being captured in a restricted memory environment, few
|
||||
optimizations (like not inclding network dracut module, disabling multipath
|
||||
and such) are applied while building the initrd. In case, the production
|
||||
environment needs these optimizations to be avoided, dracut_args option in
|
||||
/etc/kdump.conf file could be leveraged. For example, if a user wishes for
|
||||
network module to be included in the initrd, adding the below entry in
|
||||
/etc/kdump.conf file and restarting kdump service would take care of it.
|
||||
|
||||
dracut_args --add "network"
|
||||
|
||||
4) If FADump is configured to capture vmcore to a remote dump target using SSH
|
||||
or NFS protocol, the corresponding network interface '<interface-name>' is
|
||||
renamed to 'kdump-<interface-name>', if it is generic (like *eth# or net#).
|
||||
It happens because vmcore capture scripts in the initial RAM disk (initrd)
|
||||
add the 'kdump-' prefix to the network interface name to secure persistent
|
||||
naming. And as capture kernel and production kernel use the same initrd in
|
||||
case of FADump, the interface name is changed for the production kernel too.
|
||||
This is likely to impact network configuration setup for production kernel.
|
||||
So, it is recommended to use a non-generic name for a network interface,
|
||||
before setting up FADump to capture vmcore to a remote dump target based on
|
||||
that network interface, to avoid running into network configuration issues.
|
||||
|
||||
Dump Triggering methods:
|
||||
|
||||
This section talks about the various ways, other than a Kernel Panic, in which
|
||||
fadump can be triggered. The following methods assume that fadump is configured
|
||||
on your system, with the scripts enabled as described in the section above.
|
||||
|
||||
1) AltSysRq C
|
||||
|
||||
FAdump can be triggered with the combination of the 'Alt','SysRq' and 'C'
|
||||
keyboard keys. Please refer to the following link for more details:
|
||||
|
||||
https://fedoraproject.org/wiki/QA/Sysrq
|
||||
|
||||
In addition, on PowerPC boxes, fadump can also be triggered via Hardware
|
||||
Management Console(HMC) using 'Ctrl', 'O' and 'C' keyboard keys.
|
||||
|
||||
2) Kernel OOPs
|
||||
|
||||
If we want to generate a dump everytime the Kernel OOPses, we can achieve this
|
||||
by setting the 'Panic On OOPs' option as follows:
|
||||
|
||||
# echo 1 > /proc/sys/kernel/panic_on_oops
|
||||
|
||||
3) PowerPC specific methods:
|
||||
|
||||
On IBM PowerPC machines, issuing a soft reset invokes the XMON debugger(if
|
||||
XMON is configured). To configure XMON one needs to compile the kernel with
|
||||
the CONFIG_XMON and CONFIG_XMON_DEFAULT options, or by compiling with
|
||||
CONFIG_XMON and booting the kernel with xmon=on option.
|
||||
|
||||
Following are the ways to remotely issue a soft reset on PowerPC boxes, which
|
||||
would drop you to XMON. Pressing a 'X' (capital alphabet X) followed by an
|
||||
'Enter' here will trigger the dump.
|
||||
|
||||
3.1) HMC
|
||||
|
||||
Hardware Management Console(HMC) available on Power4 and Power5 machines allow
|
||||
partitions to be reset remotely. This is specially useful in hang situations
|
||||
where the system is not accepting any keyboard inputs.
|
||||
|
||||
Once you have HMC configured, the following steps will enable you to trigger
|
||||
fadump via a soft reset:
|
||||
|
||||
On Power4
|
||||
Using GUI
|
||||
|
||||
* In the right pane, right click on the partition you wish to dump.
|
||||
* Select "Operating System->Reset".
|
||||
* Select "Soft Reset".
|
||||
* Select "Yes".
|
||||
|
||||
Using HMC Commandline
|
||||
|
||||
# reset_partition -m <machine> -p <partition> -t soft
|
||||
|
||||
On Power5
|
||||
Using GUI
|
||||
|
||||
* In the right pane, right click on the partition you wish to dump.
|
||||
* Select "Restart Partition".
|
||||
* Select "Dump".
|
||||
* Select "OK".
|
||||
|
||||
Using HMC Commandline
|
||||
|
||||
# chsysstate -m <managed system name> -n <lpar name> -o dumprestart -r lpar
|
||||
|
||||
3.2) Blade Management Console for Blade Center
|
||||
|
||||
To initiate a dump operation, go to Power/Restart option under "Blade Tasks" in
|
||||
the Blade Management Console. Select the corresponding blade for which you want
|
||||
to initate the dump and then click "Restart blade with NMI". This issues a
|
||||
system reset and invokes xmon debugger.
|
||||
|
||||
|
||||
Advanced Setups & Failure action:
|
||||
|
||||
Kdump and fadump exhibit similar behavior in terms of setup & failure action.
|
||||
For fadump advanced setup related information see section "Advanced Setups" in
|
||||
"kexec-kdump-howto.txt" document. Refer to "Failure action" section in "kexec-
|
||||
kdump-howto.txt" document for fadump failure action related information.
|
||||
|
||||
Compression and filtering
|
||||
|
||||
Refer "Compression and filtering" section in "kexec-kdump-howto.txt" document.
|
||||
Compression and filtering are same for kdump & fadump.
|
||||
|
||||
|
||||
Notes on rootfs mount:
|
||||
Dracut is designed to mount rootfs by default. If rootfs mounting fails it
|
||||
will refuse to go on. So fadump leaves rootfs mounting to dracut currently.
|
||||
We make the assumtion that proper root= cmdline is being passed to dracut
|
||||
initramfs for the time being. If you need modify "KDUMP_COMMANDLINE=" in
|
||||
/etc/sysconfig/kdump, you will need to make sure that appropriate root=
|
||||
options are copied from /proc/cmdline. In general it is best to append
|
||||
command line options using "KDUMP_COMMANDLINE_APPEND=" instead of replacing
|
||||
the original command line completely.
|
||||
|
||||
How to disable FADump:
|
||||
|
||||
Remove "fadump=on"/"fadump=nocma" from kernel cmdline parameters OR replace
|
||||
it with "fadump=off" kernel cmdline parameter:
|
||||
|
||||
# grubby --update-kernel=/boot/vmlinuz-`uname -r` --remove-args="fadump=on"
|
||||
or
|
||||
# grubby --update-kernel=/boot/vmlinuz-`uname -r` --remove-args="fadump=nocma"
|
||||
OR
|
||||
# grubby --update-kernel=/boot/vmlinuz-`uname -r` --args="fadump=off"
|
||||
|
||||
Remove "crashkernel=" from kernel cmdline parameters:
|
||||
|
||||
# grubby --update-kernel=/boot/vmlinuz-`uname -r` --remove-args="crashkernel"
|
||||
|
||||
If KDump is to be used as the dump capturing mechanism, reset the crashkernel parameter:
|
||||
|
||||
# kdumpctl reset-crashkernel `uname -r`
|
||||
|
||||
Reboot the system for the settings to take effect.
|
||||
23
SOURCES/kdump-dep-generator.sh
Normal file
23
SOURCES/kdump-dep-generator.sh
Normal file
@ -0,0 +1,23 @@
|
||||
#!/bin/sh
|
||||
|
||||
# More details about systemd generator:
|
||||
# http://www.freedesktop.org/wiki/Software/systemd/Generators/
|
||||
|
||||
. /usr/lib/kdump/kdump-lib.sh
|
||||
. /usr/lib/kdump/kdump-logger.sh
|
||||
|
||||
# If invokded with no arguments for testing purpose, output to /tmp to
|
||||
# avoid overriding the existing.
|
||||
dest_dir="/tmp"
|
||||
|
||||
if [ -n "$1" ]; then
|
||||
dest_dir=$1
|
||||
fi
|
||||
|
||||
systemd_dir=/usr/lib/systemd/system
|
||||
kdump_wants=$dest_dir/kdump.service.wants
|
||||
|
||||
if is_ssh_dump_target; then
|
||||
mkdir -p $kdump_wants
|
||||
ln -sf $systemd_dir/network-online.target $kdump_wants/
|
||||
fi
|
||||
91
SOURCES/kdump-in-cluster-environment.txt
Normal file
91
SOURCES/kdump-in-cluster-environment.txt
Normal file
@ -0,0 +1,91 @@
|
||||
Kdump-in-cluster-environment HOWTO
|
||||
|
||||
Introduction
|
||||
|
||||
Kdump is a kexec based crash dumping mechansim for Linux. This docuement
|
||||
illustrate how to configure kdump in cluster environment to allow the kdump
|
||||
crash recovery service complete without being preempted by traditional power
|
||||
fencing methods.
|
||||
|
||||
Overview
|
||||
|
||||
Kexec/Kdump
|
||||
|
||||
Details about Kexec/Kdump are available in Kexec-Kdump-howto file and will not
|
||||
be described here.
|
||||
|
||||
fence_kdump
|
||||
|
||||
fence_kdump is an I/O fencing agent to be used with the kdump crash recovery
|
||||
service. When the fence_kdump agent is invoked, it will listen for a message
|
||||
from the failed node that acknowledges that the failed node is executing the
|
||||
kdump crash kernel. Note that fence_kdump is not a replacement for traditional
|
||||
fencing methods. The fence_kdump agent can only detect that a node has entered
|
||||
the kdump crash recovery service. This allows the kdump crash recovery service
|
||||
complete without being preempted by traditional power fencing methods.
|
||||
|
||||
fence_kdump_send
|
||||
|
||||
fence_kdump_send is a utility used to send messages that acknowledge that the
|
||||
node itself has entered the kdump crash recovery service. The fence_kdump_send
|
||||
utility is typically run in the kdump kernel after a cluster node has
|
||||
encountered a kernel panic. Once the cluster node has entered the kdump crash
|
||||
recovery service, fence_kdump_send will periodically send messages to all
|
||||
cluster nodes. When the fence_kdump agent receives a valid message from the
|
||||
failed nodes, fencing is complete.
|
||||
|
||||
How to configure Pacemaker cluster environment:
|
||||
|
||||
If we want to use kdump in Pacemaker cluster environment, fence-agents-kdump
|
||||
should be installed in every nodes in the cluster. You can achieve this via
|
||||
the following command:
|
||||
|
||||
# yum install -y fence-agents-kdump
|
||||
|
||||
Next is to add kdump_fence to the cluster. Assuming that the cluster consists
|
||||
of three nodes, they are node1, node2 and node3, and use Pacemaker to perform
|
||||
resource management and pcs as cli configuration tool.
|
||||
|
||||
With pcs it is easy to add a stonith resource to the cluster. For example, add
|
||||
a stonith resource named mykdumpfence with fence type of fence_kdump via the
|
||||
following commands:
|
||||
|
||||
# pcs stonith create mykdumpfence fence_kdump \
|
||||
pcmk_host_check=static-list pcmk_host_list="node1 node2 node3"
|
||||
# pcs stonith update mykdumpfence pcmk_monitor_action=metadata --force
|
||||
# pcs stonith update mykdumpfence pcmk_status_action=metadata --force
|
||||
# pcs stonith update mykdumpfence pcmk_reboot_action=off --force
|
||||
|
||||
Then enable stonith
|
||||
# pcs property set stonith-enabled=true
|
||||
|
||||
How to configure kdump:
|
||||
|
||||
Actually there are two ways how to configure fence_kdump support:
|
||||
|
||||
1) Pacemaker based clusters
|
||||
If you have successfully configured fence_kdump in Pacemaker, there is
|
||||
no need to add some special configuration in kdump. So please refer to
|
||||
Kexec-Kdump-howto file for more information.
|
||||
|
||||
2) Generic clusters
|
||||
For other types of clusters there are two configuration options in
|
||||
kdump.conf which enables fence_kdump support:
|
||||
|
||||
fence_kdump_nodes <node(s)>
|
||||
Contains list of cluster node(s) separated by space to send
|
||||
fence_kdump notification to (this option is mandatory to enable
|
||||
fence_kdump)
|
||||
|
||||
fence_kdump_args <arg(s)>
|
||||
Command line arguments for fence_kdump_send (it can contain
|
||||
all valid arguments except hosts to send notification to)
|
||||
|
||||
These options will most probably be configured by your cluster software,
|
||||
so please refer to your cluster documentation how to enable fence_kdump
|
||||
support.
|
||||
|
||||
Please be aware that these two ways cannot be combined and 2) has precedence
|
||||
over 1). It means that if fence_kdump is configured using fence_kdump_nodes
|
||||
and fence_kdump_args options in kdump.conf, Pacemaker configuration is not
|
||||
used even if it exists.
|
||||
132
SOURCES/kdump-lib-initramfs.sh
Executable file
132
SOURCES/kdump-lib-initramfs.sh
Executable file
@ -0,0 +1,132 @@
|
||||
#!/bin/sh
|
||||
#
|
||||
# The code in this file will be used in initramfs environment, bash may
|
||||
# not be the default shell. Any code added must be POSIX compliant.
|
||||
|
||||
DEFAULT_PATH="/var/crash/"
|
||||
KDUMP_CONFIG_FILE="/etc/kdump.conf"
|
||||
FENCE_KDUMP_CONFIG_FILE="/etc/sysconfig/fence_kdump"
|
||||
FENCE_KDUMP_SEND="/usr/libexec/fence_kdump_send"
|
||||
|
||||
# Read kdump config in well formated style
|
||||
kdump_read_conf()
|
||||
{
|
||||
# Following steps are applied in order: strip trailing comment, strip trailing space,
|
||||
# strip heading space, match non-empty line, remove duplicated spaces between conf name and value
|
||||
[ -f "$KDUMP_CONFIG_FILE" ] && sed -n -e "s/#.*//;s/\s*$//;s/^\s*//;s/\(\S\+\)\s*\(.*\)/\1 \2/p" $KDUMP_CONFIG_FILE
|
||||
}
|
||||
|
||||
# Retrieves config value defined in kdump.conf
|
||||
# $1: config name, sed regexp compatible
|
||||
kdump_get_conf_val()
|
||||
{
|
||||
# For lines matching "^\s*$1\s+", remove matched part (config name including space),
|
||||
# remove tailing comment, space, then store in hold space. Print out the hold buffer on last line.
|
||||
[ -f "$KDUMP_CONFIG_FILE" ] &&
|
||||
sed -n -e "/^\s*\($1\)\s\+/{s/^\s*\($1\)\s\+//;s/#.*//;s/\s*$//;h};\${x;p}" $KDUMP_CONFIG_FILE
|
||||
}
|
||||
|
||||
is_mounted()
|
||||
{
|
||||
findmnt -k -n "$1" > /dev/null 2>&1
|
||||
}
|
||||
|
||||
# $1: info type
|
||||
# $2: mount source type
|
||||
# $3: mount source
|
||||
# $4: extra args
|
||||
get_mount_info()
|
||||
{
|
||||
__kdump_mnt=$(findmnt -k -n -r -o "$1" "--$2" "$3" $4)
|
||||
|
||||
[ -z "$__kdump_mnt" ] && [ -e "/etc/fstab" ] && __kdump_mnt=$(findmnt -s -n -r -o "$1" "--$2" "$3" $4)
|
||||
|
||||
echo "$__kdump_mnt"
|
||||
}
|
||||
|
||||
is_ipv6_address()
|
||||
{
|
||||
echo "$1" | grep -q ":"
|
||||
}
|
||||
|
||||
is_fs_type_nfs()
|
||||
{
|
||||
[ "$1" = "nfs" ] || [ "$1" = "nfs4" ]
|
||||
}
|
||||
|
||||
# If $1 contains dracut_args "--mount", return <filesystem type>
|
||||
get_dracut_args_fstype()
|
||||
{
|
||||
echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f3
|
||||
}
|
||||
|
||||
# If $1 contains dracut_args "--mount", return <device>
|
||||
get_dracut_args_target()
|
||||
{
|
||||
echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f1
|
||||
}
|
||||
|
||||
get_save_path()
|
||||
{
|
||||
__kdump_path=$(kdump_get_conf_val path)
|
||||
[ -z "$__kdump_path" ] && __kdump_path=$DEFAULT_PATH
|
||||
|
||||
# strip the duplicated "/"
|
||||
echo "$__kdump_path" | tr -s /
|
||||
}
|
||||
|
||||
get_root_fs_device()
|
||||
{
|
||||
findmnt -k -f -n -o SOURCE /
|
||||
}
|
||||
|
||||
# Return the current underlying device of a path, ignore bind mounts
|
||||
get_target_from_path()
|
||||
{
|
||||
__kdump_target=$(df "$1" 2> /dev/null | tail -1 | awk '{print $1}')
|
||||
[ "$__kdump_target" = "/dev/root" ] && [ ! -e /dev/root ] && __kdump_target=$(get_root_fs_device)
|
||||
echo "$__kdump_target"
|
||||
}
|
||||
|
||||
get_fs_type_from_target()
|
||||
{
|
||||
get_mount_info FSTYPE source "$1" -f
|
||||
}
|
||||
|
||||
get_mntpoint_from_target()
|
||||
{
|
||||
# --source is applied to ensure non-bind mount is returned
|
||||
get_mount_info TARGET source "$1" -f
|
||||
}
|
||||
|
||||
is_ssh_dump_target()
|
||||
{
|
||||
kdump_get_conf_val ssh | grep -q @
|
||||
}
|
||||
|
||||
is_raw_dump_target()
|
||||
{
|
||||
[ -n "$(kdump_get_conf_val raw)" ]
|
||||
}
|
||||
|
||||
is_nfs_dump_target()
|
||||
{
|
||||
if [ -n "$(kdump_get_conf_val nfs)" ]; then
|
||||
return 0
|
||||
fi
|
||||
|
||||
if is_fs_type_nfs "$(get_dracut_args_fstype "$(kdump_get_conf_val dracut_args)")"; then
|
||||
return 0
|
||||
fi
|
||||
|
||||
if is_fs_type_nfs "$(get_fs_type_from_target "$(get_target_from_path "$(get_save_path)")")"; then
|
||||
return 0
|
||||
fi
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
is_fs_dump_target()
|
||||
{
|
||||
[ -n "$(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix")" ]
|
||||
}
|
||||
989
SOURCES/kdump-lib.sh
Executable file
989
SOURCES/kdump-lib.sh
Executable file
@ -0,0 +1,989 @@
|
||||
#!/bin/bash
|
||||
#
|
||||
# Kdump common variables and functions
|
||||
#
|
||||
|
||||
. /usr/lib/kdump/kdump-lib-initramfs.sh
|
||||
|
||||
FADUMP_ENABLED_SYS_NODE="/sys/kernel/fadump_enabled"
|
||||
|
||||
is_fadump_capable()
|
||||
{
|
||||
# Check if firmware-assisted dump is enabled
|
||||
# if no, fallback to kdump check
|
||||
if [[ -f $FADUMP_ENABLED_SYS_NODE ]]; then
|
||||
rc=$(< $FADUMP_ENABLED_SYS_NODE)
|
||||
[[ $rc -eq 1 ]] && return 0
|
||||
fi
|
||||
return 1
|
||||
}
|
||||
|
||||
is_squash_available()
|
||||
{
|
||||
for kmodule in squashfs overlay loop; do
|
||||
if [[ -z $KDUMP_KERNELVER ]]; then
|
||||
modprobe --dry-run $kmodule &> /dev/null || return 1
|
||||
else
|
||||
modprobe -S "$KDUMP_KERNELVER" --dry-run $kmodule &> /dev/null || return 1
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
is_zstd_command_available()
|
||||
{
|
||||
[[ -x "$(command -v zstd)" ]]
|
||||
}
|
||||
|
||||
perror_exit()
|
||||
{
|
||||
derror "$@"
|
||||
exit 1
|
||||
}
|
||||
|
||||
# Check if fence kdump is configured in Pacemaker cluster
|
||||
is_pcs_fence_kdump()
|
||||
{
|
||||
# no pcs or fence_kdump_send executables installed?
|
||||
type -P pcs > /dev/null || return 1
|
||||
[[ -x $FENCE_KDUMP_SEND ]] || return 1
|
||||
|
||||
# fence kdump not configured?
|
||||
(pcs cluster cib | grep 'type="fence_kdump"') &> /dev/null || return 1
|
||||
}
|
||||
|
||||
# Check if fence_kdump is configured using kdump options
|
||||
is_generic_fence_kdump()
|
||||
{
|
||||
[[ -x $FENCE_KDUMP_SEND ]] || return 1
|
||||
|
||||
[[ $(kdump_get_conf_val fence_kdump_nodes) ]]
|
||||
}
|
||||
|
||||
to_dev_name()
|
||||
{
|
||||
local dev="${1//\"/}"
|
||||
|
||||
case "$dev" in
|
||||
UUID=*)
|
||||
blkid -U "${dev#UUID=}"
|
||||
;;
|
||||
LABEL=*)
|
||||
blkid -L "${dev#LABEL=}"
|
||||
;;
|
||||
*)
|
||||
echo "$dev"
|
||||
;;
|
||||
esac
|
||||
}
|
||||
|
||||
is_user_configured_dump_target()
|
||||
{
|
||||
[[ $(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix\|raw\|nfs\|ssh") ]] || is_mount_in_dracut_args
|
||||
}
|
||||
|
||||
get_user_configured_dump_disk()
|
||||
{
|
||||
local _target
|
||||
|
||||
_target=$(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix\|raw")
|
||||
[[ -n $_target ]] && echo "$_target" && return
|
||||
|
||||
_target=$(get_dracut_args_target "$(kdump_get_conf_val "dracut_args")")
|
||||
[[ -b $_target ]] && echo "$_target"
|
||||
}
|
||||
|
||||
get_block_dump_target()
|
||||
{
|
||||
local _target _path
|
||||
|
||||
if is_ssh_dump_target || is_nfs_dump_target; then
|
||||
return
|
||||
fi
|
||||
|
||||
_target=$(get_user_configured_dump_disk)
|
||||
[[ -n $_target ]] && to_dev_name "$_target" && return
|
||||
|
||||
# Get block device name from local save path
|
||||
_path=$(get_save_path)
|
||||
_target=$(get_target_from_path "$_path")
|
||||
[[ -b $_target ]] && to_dev_name "$_target"
|
||||
}
|
||||
|
||||
is_dump_to_rootfs()
|
||||
{
|
||||
[[ $(kdump_get_conf_val 'failure_action\|default') == dump_to_rootfs ]]
|
||||
}
|
||||
|
||||
get_failure_action_target()
|
||||
{
|
||||
local _target
|
||||
|
||||
if is_dump_to_rootfs; then
|
||||
# Get rootfs device name
|
||||
_target=$(get_root_fs_device)
|
||||
[[ -b $_target ]] && to_dev_name "$_target" && return
|
||||
# Then, must be nfs root
|
||||
echo "nfs"
|
||||
fi
|
||||
}
|
||||
|
||||
# Get kdump targets(including root in case of dump_to_rootfs).
|
||||
get_kdump_targets()
|
||||
{
|
||||
local _target _root
|
||||
local kdump_targets
|
||||
|
||||
_target=$(get_block_dump_target)
|
||||
if [[ -n $_target ]]; then
|
||||
kdump_targets=$_target
|
||||
elif is_ssh_dump_target; then
|
||||
kdump_targets="ssh"
|
||||
else
|
||||
kdump_targets="nfs"
|
||||
fi
|
||||
|
||||
# Add the root device if dump_to_rootfs is specified.
|
||||
_root=$(get_failure_action_target)
|
||||
if [[ -n $_root ]] && [[ $kdump_targets != "$_root" ]]; then
|
||||
kdump_targets="$kdump_targets $_root"
|
||||
fi
|
||||
|
||||
echo "$kdump_targets"
|
||||
}
|
||||
|
||||
# Return the bind mount source path, return the path itself if it's not bind mounted
|
||||
# Eg. if /path/to/src is bind mounted to /mnt/bind, then:
|
||||
# /mnt/bind -> /path/to/src, /mnt/bind/dump -> /path/to/src/dump
|
||||
#
|
||||
# findmnt uses the option "-v, --nofsroot" to exclusive the [/dir]
|
||||
# in the SOURCE column for bind-mounts, then if $_src equals to
|
||||
# $_src_nofsroot, the mountpoint is not bind mounted directory.
|
||||
#
|
||||
# Below is just an example for mount info
|
||||
# /dev/mapper/atomicos-root[/ostree/deploy/rhel-atomic-host/var], if the
|
||||
# directory is bind mounted. The former part represents the device path, rest
|
||||
# part is the bind mounted directory which quotes by bracket "[]".
|
||||
get_bind_mount_source()
|
||||
{
|
||||
local _mnt _path _src _opt _fstype
|
||||
local _fsroot _src_nofsroot
|
||||
|
||||
_mnt=$(df "$1" | tail -1 | awk '{print $NF}')
|
||||
_path=${1#$_mnt}
|
||||
|
||||
_src=$(get_mount_info SOURCE target "$_mnt" -f)
|
||||
_opt=$(get_mount_info OPTIONS target "$_mnt" -f)
|
||||
_fstype=$(get_mount_info FSTYPE target "$_mnt" -f)
|
||||
|
||||
# bind mount in fstab
|
||||
if [[ -d $_src ]] && [[ $_fstype == none ]] && (echo "$_opt" | grep -q "\bbind\b"); then
|
||||
echo "$_src$_path" && return
|
||||
fi
|
||||
|
||||
# direct mount
|
||||
_src_nofsroot=$(get_mount_info SOURCE target "$_mnt" -v -f)
|
||||
if [[ $_src_nofsroot == "$_src" ]]; then
|
||||
echo "$_mnt$_path" && return
|
||||
fi
|
||||
|
||||
_fsroot=${_src#${_src_nofsroot}[}
|
||||
_fsroot=${_fsroot%]}
|
||||
_mnt=$(get_mount_info TARGET source "$_src_nofsroot" -f)
|
||||
|
||||
# for btrfs, _fsroot will also contain the subvol value as well, strip it
|
||||
if [[ $_fstype == btrfs ]]; then
|
||||
local _subvol
|
||||
_subvol=${_opt#*subvol=}
|
||||
_subvol=${_subvol%,*}
|
||||
_fsroot=${_fsroot#$_subvol}
|
||||
fi
|
||||
echo "$_mnt$_fsroot$_path"
|
||||
}
|
||||
|
||||
get_mntopt_from_target()
|
||||
{
|
||||
get_mount_info OPTIONS source "$1" -f
|
||||
}
|
||||
|
||||
# Get the path where the target will be mounted in kdump kernel
|
||||
# $1: kdump target device
|
||||
get_kdump_mntpoint_from_target()
|
||||
{
|
||||
local _mntpoint
|
||||
|
||||
_mntpoint=$(get_mntpoint_from_target "$1")
|
||||
# mount under /sysroot if dump to root disk or mount under
|
||||
# mount under /kdumproot if dump target is not mounted in first kernel
|
||||
# mount under /kdumproot/$_mntpoint in other cases in 2nd kernel.
|
||||
# systemd will be in charge to umount it.
|
||||
if [[ -z $_mntpoint ]]; then
|
||||
_mntpoint="/kdumproot"
|
||||
else
|
||||
if [[ $_mntpoint == "/" ]]; then
|
||||
_mntpoint="/sysroot"
|
||||
else
|
||||
_mntpoint="/kdumproot/$_mntpoint"
|
||||
fi
|
||||
fi
|
||||
|
||||
# strip duplicated "/"
|
||||
echo $_mntpoint | tr -s "/"
|
||||
}
|
||||
|
||||
kdump_get_persistent_dev()
|
||||
{
|
||||
local dev="${1//\"/}"
|
||||
|
||||
case "$dev" in
|
||||
UUID=*)
|
||||
dev=$(blkid -U "${dev#UUID=}")
|
||||
;;
|
||||
LABEL=*)
|
||||
dev=$(blkid -L "${dev#LABEL=}")
|
||||
;;
|
||||
esac
|
||||
echo $(get_persistent_dev "$dev")
|
||||
}
|
||||
|
||||
is_atomic()
|
||||
{
|
||||
grep -q "ostree" /proc/cmdline
|
||||
}
|
||||
|
||||
# get ip address or hostname from nfs/ssh config value
|
||||
get_remote_host()
|
||||
{
|
||||
local _config_val=$1
|
||||
|
||||
# ipv6 address in kdump.conf is around with "[]",
|
||||
# factor out the ipv6 address
|
||||
_config_val=${_config_val#*@}
|
||||
_config_val=${_config_val%:/*}
|
||||
_config_val=${_config_val#[}
|
||||
_config_val=${_config_val%]}
|
||||
echo "$_config_val"
|
||||
}
|
||||
|
||||
is_hostname()
|
||||
{
|
||||
local _hostname
|
||||
|
||||
_hostname=$(echo "$1" | grep ":")
|
||||
if [[ -n $_hostname ]]; then
|
||||
return 1
|
||||
fi
|
||||
echo "$1" | grep -q "[a-zA-Z]"
|
||||
}
|
||||
|
||||
# Copied from "/etc/sysconfig/network-scripts/network-functions"
|
||||
get_hwaddr()
|
||||
{
|
||||
if [[ -f "/sys/class/net/$1/address" ]]; then
|
||||
awk '{ print toupper($0) }' < "/sys/class/net/$1/address"
|
||||
elif [[ -d "/sys/class/net/$1" ]]; then
|
||||
LC_ALL="" LANG="" ip -o link show "$1" 2> /dev/null |
|
||||
awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/,
|
||||
"\\1", 1)); }'
|
||||
fi
|
||||
}
|
||||
|
||||
# Get value by a field using "nmcli -g"
|
||||
# Usage: get_nmcli_value_by_field <field> <nmcli command>
|
||||
#
|
||||
# "nmcli --get-values" allows us to retrive value(s) by field, for example,
|
||||
# nmcli --get-values <field> connection show /org/freedesktop/NetworkManager/ActiveConnection/1
|
||||
# returns the following value for the corresponding field respectively,
|
||||
# Field Value
|
||||
# IP4.DNS "10.19.42.41 | 10.11.5.19 | 10.5.30.160"
|
||||
# 802-3-ethernet.s390-subchannels ""
|
||||
# bond.options "mode=balance-rr"
|
||||
get_nmcli_value_by_field()
|
||||
{
|
||||
LANG=C nmcli --get-values "$@"
|
||||
}
|
||||
|
||||
# Get nmcli field value of an connection apath (a D-Bus active connection path)
|
||||
# Usage: get_nmcli_field_by_apath <field> <apath>
|
||||
get_nmcli_field_by_conpath()
|
||||
{
|
||||
local _field=$1 _apath=$2
|
||||
|
||||
get_nmcli_value_by_field "$_field" connection show "$_apath"
|
||||
}
|
||||
|
||||
# Get nmcli connection apath (a D-Bus active connection path ) by ifname
|
||||
#
|
||||
# apath is used for nmcli connection operations, e.g.
|
||||
# $ nmcli connection show $apath
|
||||
get_nmcli_connection_apath_by_ifname()
|
||||
{
|
||||
local _ifname=$1
|
||||
|
||||
get_nmcli_value_by_field "GENERAL.CON-PATH" device show "$_ifname"
|
||||
}
|
||||
|
||||
get_ifcfg_by_device()
|
||||
{
|
||||
grep -E -i -l "^[[:space:]]*DEVICE=\"*${1}\"*[[:space:]]*$" \
|
||||
/etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null | head -1
|
||||
}
|
||||
|
||||
get_ifcfg_by_hwaddr()
|
||||
{
|
||||
grep -E -i -l "^[[:space:]]*HWADDR=\"*${1}\"*[[:space:]]*$" \
|
||||
/etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null | head -1
|
||||
}
|
||||
|
||||
get_ifcfg_by_uuid()
|
||||
{
|
||||
grep -E -i -l "^[[:space:]]*UUID=\"*${1}\"*[[:space:]]*$" \
|
||||
/etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null | head -1
|
||||
}
|
||||
|
||||
get_ifcfg_by_name()
|
||||
{
|
||||
grep -E -i -l "^[[:space:]]*NAME=\"*${1}\"*[[:space:]]*$" \
|
||||
/etc/sysconfig/network-scripts/ifcfg-* 2> /dev/null | head -1
|
||||
}
|
||||
|
||||
is_nm_running()
|
||||
{
|
||||
[[ "$(LANG=C nmcli -t --fields running general status 2> /dev/null)" == "running" ]]
|
||||
}
|
||||
|
||||
is_nm_handling()
|
||||
{
|
||||
LANG=C nmcli -t --fields device,state dev status 2> /dev/null |
|
||||
grep -q "^\(${1}:connected\)\|\(${1}:connecting.*\)$"
|
||||
}
|
||||
|
||||
# $1: netdev name
|
||||
get_ifcfg_nmcli()
|
||||
{
|
||||
local nm_uuid nm_name
|
||||
local ifcfg_file
|
||||
|
||||
# Get the active nmcli config name of $1
|
||||
if is_nm_running && is_nm_handling "${1}"; then
|
||||
# The configuration "uuid" and "name" generated by nm is wrote to
|
||||
# the ifcfg file as "UUID=<nm_uuid>" and "NAME=<nm_name>".
|
||||
nm_uuid=$(LANG=C nmcli -t --fields uuid,device c show --active 2> /dev/null |
|
||||
grep "${1}" | head -1 | cut -d':' -f1)
|
||||
nm_name=$(LANG=C nmcli -t --fields name,device c show --active 2> /dev/null |
|
||||
grep "${1}" | head -1 | cut -d':' -f1)
|
||||
ifcfg_file=$(get_ifcfg_by_uuid "${nm_uuid}")
|
||||
[[ -z ${ifcfg_file} ]] && ifcfg_file=$(get_ifcfg_by_name "${nm_name}")
|
||||
fi
|
||||
|
||||
echo -n "${ifcfg_file}"
|
||||
}
|
||||
|
||||
# $1: netdev name
|
||||
get_ifcfg_legacy()
|
||||
{
|
||||
local ifcfg_file hwaddr
|
||||
|
||||
ifcfg_file="/etc/sysconfig/network-scripts/ifcfg-${1}"
|
||||
[[ -f ${ifcfg_file} ]] && echo -n "${ifcfg_file}" && return
|
||||
|
||||
ifcfg_file=$(get_ifcfg_by_name "${1}")
|
||||
[[ -f ${ifcfg_file} ]] && echo -n "${ifcfg_file}" && return
|
||||
|
||||
hwaddr=$(get_hwaddr "${1}")
|
||||
if [[ -n $hwaddr ]]; then
|
||||
ifcfg_file=$(get_ifcfg_by_hwaddr "${hwaddr}")
|
||||
[[ -f ${ifcfg_file} ]] && echo -n "${ifcfg_file}" && return
|
||||
fi
|
||||
|
||||
ifcfg_file=$(get_ifcfg_by_device "${1}")
|
||||
|
||||
echo -n "${ifcfg_file}"
|
||||
}
|
||||
|
||||
# $1: netdev name
|
||||
# Return the ifcfg file whole name(including the path) of $1 if any.
|
||||
get_ifcfg_filename()
|
||||
{
|
||||
local ifcfg_file
|
||||
|
||||
ifcfg_file=$(get_ifcfg_nmcli "${1}")
|
||||
if [[ -z ${ifcfg_file} ]]; then
|
||||
ifcfg_file=$(get_ifcfg_legacy "${1}")
|
||||
fi
|
||||
|
||||
echo -n "${ifcfg_file}"
|
||||
}
|
||||
|
||||
# returns 0 when omission of a module is desired in dracut_args
|
||||
# returns 1 otherwise
|
||||
is_dracut_mod_omitted()
|
||||
{
|
||||
local dracut_args dracut_mod=$1
|
||||
|
||||
set -- $(kdump_get_conf_val dracut_args)
|
||||
while [ $# -gt 0 ]; do
|
||||
case $1 in
|
||||
-o | --omit)
|
||||
[[ " ${2//[^[:alnum:]]/ } " == *" $dracut_mod "* ]] && return 0
|
||||
;;
|
||||
esac
|
||||
shift
|
||||
done
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
is_wdt_active()
|
||||
{
|
||||
local active
|
||||
|
||||
[[ -d /sys/class/watchdog ]] || return 1
|
||||
for dir in /sys/class/watchdog/*; do
|
||||
[[ -f "$dir/state" ]] || continue
|
||||
active=$(< "$dir/state")
|
||||
[[ $active == "active" ]] && return 0
|
||||
done
|
||||
return 1
|
||||
}
|
||||
|
||||
have_compression_in_dracut_args()
|
||||
{
|
||||
[[ "$(kdump_get_conf_val dracut_args)" =~ \
|
||||
(^|[[:space:]])--(gzip|bzip2|lzma|xz|lzo|lz4|zstd|no-compress|compress)([[:space:]]|$) ]]
|
||||
}
|
||||
|
||||
# If "dracut_args" contains "--mount" information, use it
|
||||
# directly without any check(users are expected to ensure
|
||||
# its correctness).
|
||||
is_mount_in_dracut_args()
|
||||
{
|
||||
[[ " $(kdump_get_conf_val dracut_args)" =~ .*[[:space:]]--mount[=[:space:]].* ]]
|
||||
}
|
||||
|
||||
check_crash_mem_reserved()
|
||||
{
|
||||
local mem_reserved
|
||||
|
||||
mem_reserved=$(< /sys/kernel/kexec_crash_size)
|
||||
if [[ $mem_reserved -eq 0 ]]; then
|
||||
derror "No memory reserved for crash kernel"
|
||||
return 1
|
||||
fi
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
check_kdump_feasibility()
|
||||
{
|
||||
if [[ ! -e /sys/kernel/kexec_crash_loaded ]]; then
|
||||
derror "Kdump is not supported on this kernel"
|
||||
return 1
|
||||
fi
|
||||
check_crash_mem_reserved
|
||||
return $?
|
||||
}
|
||||
|
||||
check_current_kdump_status()
|
||||
{
|
||||
if [[ ! -f /sys/kernel/kexec_crash_loaded ]]; then
|
||||
derror "Perhaps CONFIG_CRASH_DUMP is not enabled in kernel"
|
||||
return 1
|
||||
fi
|
||||
|
||||
rc=$(< /sys/kernel/kexec_crash_loaded)
|
||||
if [[ $rc == 1 ]]; then
|
||||
return 0
|
||||
else
|
||||
return 1
|
||||
fi
|
||||
}
|
||||
|
||||
# remove_cmdline_param <kernel cmdline> <param1> [<param2>] ... [<paramN>]
|
||||
# Remove a list of kernel parameters from a given kernel cmdline and print the result.
|
||||
# For each "arg" in the removing params list, "arg" and "arg=xxx" will be removed if exists.
|
||||
remove_cmdline_param()
|
||||
{
|
||||
local cmdline=$1
|
||||
shift
|
||||
|
||||
for arg in "$@"; do
|
||||
cmdline=$(echo "$cmdline" |
|
||||
sed -e "s/\b$arg=[^ ]*//g" \
|
||||
-e "s/^$arg\b//g" \
|
||||
-e "s/[[:space:]]$arg\b//g" \
|
||||
-e "s/\s\+/ /g")
|
||||
done
|
||||
echo "$cmdline"
|
||||
}
|
||||
|
||||
#
|
||||
# This function returns the "apicid" of the boot
|
||||
# cpu (cpu 0) if present.
|
||||
#
|
||||
get_bootcpu_apicid()
|
||||
{
|
||||
awk ' \
|
||||
BEGIN { CPU = "-1"; } \
|
||||
$1=="processor" && $2==":" { CPU = $NF; } \
|
||||
CPU=="0" && /^apicid/ { print $NF; } \
|
||||
' \
|
||||
/proc/cpuinfo
|
||||
}
|
||||
|
||||
#
|
||||
# append_cmdline <kernel cmdline> <parameter name> <parameter value>
|
||||
# This function appends argument "$2=$3" to string ($1) if not already present.
|
||||
#
|
||||
append_cmdline()
|
||||
{
|
||||
local cmdline=$1
|
||||
local newstr=${cmdline/$2/""}
|
||||
|
||||
# unchanged str implies argument wasn't there
|
||||
if [[ $cmdline == "$newstr" ]]; then
|
||||
cmdline="${cmdline} ${2}=${3}"
|
||||
fi
|
||||
|
||||
echo "$cmdline"
|
||||
}
|
||||
|
||||
# This function check iomem and determines if we have more than
|
||||
# 4GB of ram available. Returns 1 if we do, 0 if we dont
|
||||
need_64bit_headers()
|
||||
{
|
||||
return "$(tail -n 1 /proc/iomem | awk '{ split ($1, r, "-");
|
||||
print (strtonum("0x" r[2]) > strtonum("0xffffffff")); }')"
|
||||
}
|
||||
|
||||
# Check if secure boot is being enforced.
|
||||
#
|
||||
# Per Peter Jones, we need check efivar SecureBoot-$(the UUID) and
|
||||
# SetupMode-$(the UUID), they are both 5 bytes binary data. The first four
|
||||
# bytes are the attributes associated with the variable and can safely be
|
||||
# ignored, the last bytes are one-byte true-or-false variables. If SecureBoot
|
||||
# is 1 and SetupMode is 0, then secure boot is being enforced.
|
||||
#
|
||||
# Assume efivars is mounted at /sys/firmware/efi/efivars.
|
||||
is_secure_boot_enforced()
|
||||
{
|
||||
local secure_boot_file setup_mode_file
|
||||
local secure_boot_byte setup_mode_byte
|
||||
|
||||
# On powerpc, secure boot is enforced if:
|
||||
# host secure boot: /ibm,secure-boot/os-secureboot-enforcing DT property exists
|
||||
# guest secure boot: /ibm,secure-boot >= 2
|
||||
if [[ -f /proc/device-tree/ibm,secureboot/os-secureboot-enforcing ]]; then
|
||||
return 0
|
||||
fi
|
||||
if [[ -f /proc/device-tree/ibm,secure-boot ]] &&
|
||||
[[ $(lsprop /proc/device-tree/ibm,secure-boot | tail -1) -ge 2 ]]; then
|
||||
return 0
|
||||
fi
|
||||
|
||||
# Detect secure boot on x86 and arm64
|
||||
secure_boot_file=$(find /sys/firmware/efi/efivars -name "SecureBoot-*" 2> /dev/null)
|
||||
setup_mode_file=$(find /sys/firmware/efi/efivars -name "SetupMode-*" 2> /dev/null)
|
||||
|
||||
if [[ -f $secure_boot_file ]] && [[ -f $setup_mode_file ]]; then
|
||||
secure_boot_byte=$(hexdump -v -e '/1 "%d\ "' "$secure_boot_file" | cut -d' ' -f 5)
|
||||
setup_mode_byte=$(hexdump -v -e '/1 "%d\ "' "$setup_mode_file" | cut -d' ' -f 5)
|
||||
|
||||
if [[ $secure_boot_byte == "1" ]] && [[ $setup_mode_byte == "0" ]]; then
|
||||
return 0
|
||||
fi
|
||||
fi
|
||||
|
||||
# Detect secure boot on s390x
|
||||
if [[ -e "/sys/firmware/ipl/secure" && "$(< /sys/firmware/ipl/secure)" == "1" ]]; then
|
||||
return 0
|
||||
fi
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
#
|
||||
# prepare_kexec_args <kexec args>
|
||||
# This function prepares kexec argument.
|
||||
#
|
||||
prepare_kexec_args()
|
||||
{
|
||||
local kexec_args=$1
|
||||
local found_elf_args
|
||||
|
||||
ARCH=$(uname -m)
|
||||
if [[ $ARCH == "i686" ]] || [[ $ARCH == "i386" ]]; then
|
||||
need_64bit_headers
|
||||
if [[ $? == 1 ]]; then
|
||||
found_elf_args=$(echo "$kexec_args" | grep elf32-core-headers)
|
||||
if [[ -n $found_elf_args ]]; then
|
||||
dwarn "Warning: elf32-core-headers overrides correct elf64 setting"
|
||||
else
|
||||
kexec_args="$kexec_args --elf64-core-headers"
|
||||
fi
|
||||
else
|
||||
found_elf_args=$(echo "$kexec_args" | grep elf64-core-headers)
|
||||
if [[ -z $found_elf_args ]]; then
|
||||
kexec_args="$kexec_args --elf32-core-headers"
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
echo "$kexec_args"
|
||||
}
|
||||
|
||||
#
|
||||
# Detect initrd and kernel location, results are stored in global enviromental variables:
|
||||
# KDUMP_BOOTDIR, KDUMP_KERNELVER, KDUMP_KERNEL, DEFAULT_INITRD, and KDUMP_INITRD
|
||||
#
|
||||
# Expectes KDUMP_BOOTDIR, KDUMP_IMG, KDUMP_IMG_EXT, KDUMP_KERNELVER to be loaded from config already
|
||||
# and will prefer already set values so user can specify custom kernel/initramfs location
|
||||
#
|
||||
prepare_kdump_bootinfo()
|
||||
{
|
||||
local boot_img boot_imglist boot_dirlist boot_initrdlist
|
||||
local machine_id
|
||||
|
||||
if [[ -z $KDUMP_KERNELVER ]]; then
|
||||
KDUMP_KERNELVER="$(uname -r)"
|
||||
fi
|
||||
|
||||
read -r machine_id < /etc/machine-id
|
||||
boot_dirlist=${KDUMP_BOOTDIR:-"/boot /boot/efi /efi /"}
|
||||
boot_imglist="$KDUMP_IMG-$KDUMP_KERNELVER$KDUMP_IMG_EXT $machine_id/$KDUMP_KERNELVER/$KDUMP_IMG"
|
||||
|
||||
# Use BOOT_IMAGE as reference if possible, strip the GRUB root device prefix in (hd0,gpt1) format
|
||||
boot_img="$(sed "s/^BOOT_IMAGE=\((\S*)\)\?\(\S*\) .*/\2/" /proc/cmdline)"
|
||||
if [[ -n $boot_img ]]; then
|
||||
boot_imglist="$boot_img $boot_imglist"
|
||||
fi
|
||||
|
||||
for dir in $boot_dirlist; do
|
||||
for img in $boot_imglist; do
|
||||
if [[ -f "$dir/$img" ]]; then
|
||||
KDUMP_KERNEL=$(echo "$dir/$img" | tr -s '/')
|
||||
break 2
|
||||
fi
|
||||
done
|
||||
done
|
||||
|
||||
if ! [[ -e $KDUMP_KERNEL ]]; then
|
||||
derror "Failed to detect kdump kernel location"
|
||||
return 1
|
||||
fi
|
||||
|
||||
# Set KDUMP_BOOTDIR to where kernel image is stored
|
||||
KDUMP_BOOTDIR=$(dirname "$KDUMP_KERNEL")
|
||||
|
||||
# Default initrd should just stay aside of kernel image, try to find it in KDUMP_BOOTDIR
|
||||
boot_initrdlist="initramfs-$KDUMP_KERNELVER.img initrd"
|
||||
for initrd in $boot_initrdlist; do
|
||||
if [[ -f "$KDUMP_BOOTDIR/$initrd" ]]; then
|
||||
defaut_initrd_base="$initrd"
|
||||
DEFAULT_INITRD="$KDUMP_BOOTDIR/$defaut_initrd_base"
|
||||
break
|
||||
fi
|
||||
done
|
||||
|
||||
# Create kdump initrd basename from default initrd basename
|
||||
# initramfs-5.7.9-200.fc32.x86_64.img => initramfs-5.7.9-200.fc32.x86_64kdump.img
|
||||
# initrd => initrdkdump
|
||||
if [[ -z $defaut_initrd_base ]]; then
|
||||
kdump_initrd_base=initramfs-${KDUMP_KERNELVER}kdump.img
|
||||
elif [[ $defaut_initrd_base == *.* ]]; then
|
||||
kdump_initrd_base=${defaut_initrd_base%.*}kdump.${DEFAULT_INITRD##*.}
|
||||
else
|
||||
kdump_initrd_base=${defaut_initrd_base}kdump
|
||||
fi
|
||||
|
||||
# Place kdump initrd in $(/var/lib/kdump) if $(KDUMP_BOOTDIR) not writable
|
||||
if [[ ! -w $KDUMP_BOOTDIR ]]; then
|
||||
var_target_initrd_dir="/var/lib/kdump"
|
||||
mkdir -p "$var_target_initrd_dir"
|
||||
KDUMP_INITRD="$var_target_initrd_dir/$kdump_initrd_base"
|
||||
else
|
||||
KDUMP_INITRD="$KDUMP_BOOTDIR/$kdump_initrd_base"
|
||||
fi
|
||||
}
|
||||
|
||||
get_watchdog_drvs()
|
||||
{
|
||||
local _wdtdrvs _drv _dir
|
||||
|
||||
for _dir in /sys/class/watchdog/*; do
|
||||
# device/modalias will return driver of this device
|
||||
[[ -f "$_dir/device/modalias" ]] || continue
|
||||
_drv=$(< "$_dir/device/modalias")
|
||||
_drv=$(modprobe --set-version "$KDUMP_KERNELVER" -R "$_drv" 2> /dev/null)
|
||||
for i in $_drv; do
|
||||
if ! [[ " $_wdtdrvs " == *" $i "* ]]; then
|
||||
_wdtdrvs="$_wdtdrvs $i"
|
||||
fi
|
||||
done
|
||||
done
|
||||
|
||||
echo "$_wdtdrvs"
|
||||
}
|
||||
|
||||
#
|
||||
# prepare_cmdline <commandline> <commandline remove> <commandline append>
|
||||
# This function performs a series of edits on the command line.
|
||||
# Store the final result in global $KDUMP_COMMANDLINE.
|
||||
prepare_cmdline()
|
||||
{
|
||||
local cmdline id arg
|
||||
|
||||
if [[ -z $1 ]]; then
|
||||
cmdline=$(< /proc/cmdline)
|
||||
else
|
||||
cmdline="$1"
|
||||
fi
|
||||
|
||||
# These params should always be removed
|
||||
cmdline=$(remove_cmdline_param "$cmdline" crashkernel panic_on_warn)
|
||||
# These params can be removed configurably
|
||||
while read -r arg; do
|
||||
cmdline=$(remove_cmdline_param "$cmdline" "$arg")
|
||||
done <<< "$(echo "$2" | xargs -n 1 echo)"
|
||||
|
||||
# Always remove "root=X", as we now explicitly generate all kinds
|
||||
# of dump target mount information including root fs.
|
||||
#
|
||||
# We do this before KDUMP_COMMANDLINE_APPEND, if one really cares
|
||||
# about it(e.g. for debug purpose), then can pass "root=X" using
|
||||
# KDUMP_COMMANDLINE_APPEND.
|
||||
cmdline=$(remove_cmdline_param "$cmdline" root)
|
||||
|
||||
# With the help of "--hostonly-cmdline", we can avoid some interitage.
|
||||
cmdline=$(remove_cmdline_param "$cmdline" rd.lvm.lv rd.luks.uuid rd.dm.uuid rd.md.uuid fcoe)
|
||||
|
||||
# Remove netroot, rd.iscsi.initiator and iscsi_initiator since
|
||||
# we get duplicate entries for the same in case iscsi code adds
|
||||
# it as well.
|
||||
cmdline=$(remove_cmdline_param "$cmdline" netroot rd.iscsi.initiator iscsi_initiator)
|
||||
|
||||
cmdline="${cmdline} $3"
|
||||
|
||||
id=$(get_bootcpu_apicid)
|
||||
if [[ -n ${id} ]]; then
|
||||
cmdline=$(append_cmdline "$cmdline" disable_cpu_apicid "$id")
|
||||
fi
|
||||
|
||||
# If any watchdog is used, set it's pretimeout to 0. pretimeout let
|
||||
# watchdog panic the kernel first, and reset the system after the
|
||||
# panic. If the system is already in kdump, panic is not helpful
|
||||
# and only increase the chance of watchdog failure.
|
||||
for i in $(get_watchdog_drvs); do
|
||||
cmdline+=" $i.pretimeout=0"
|
||||
|
||||
if [[ $i == hpwdt ]]; then
|
||||
# hpwdt have a special parameter kdumptimeout, is's only suppose
|
||||
# to be set to non-zero in first kernel. In kdump, non-zero
|
||||
# value could prevent the watchdog from resetting the system.
|
||||
cmdline+=" $i.kdumptimeout=0"
|
||||
fi
|
||||
done
|
||||
|
||||
echo "$cmdline"
|
||||
}
|
||||
|
||||
#get system memory size in the unit of GB
|
||||
get_system_size()
|
||||
{
|
||||
result=$(grep "System RAM" /proc/iomem | awk -F ":" '{ print $1 }' | tr "[:lower:]" "[:upper:]" | paste -sd+)
|
||||
result="+$result"
|
||||
# replace '-' with '+0x' and '+' with '-0x'
|
||||
sum=$(echo "$result" | sed -e 's/-/K0x/g' -e 's/+/-0x/g' -e 's/K/+/g')
|
||||
size=$(printf "%d\n" $((sum)))
|
||||
size=$((size / 1024 / 1024 / 1024))
|
||||
|
||||
echo "$size"
|
||||
}
|
||||
|
||||
get_recommend_size()
|
||||
{
|
||||
local mem_size=$1
|
||||
local _ck_cmdline=$2
|
||||
local OLDIFS="$IFS"
|
||||
|
||||
start=${_ck_cmdline::1}
|
||||
if [[ $mem_size -lt $start ]]; then
|
||||
echo "0M"
|
||||
return
|
||||
fi
|
||||
IFS=','
|
||||
for i in $_ck_cmdline; do
|
||||
end=$(echo "$i" | awk -F "-" '{ print $2 }' | awk -F ":" '{ print $1 }')
|
||||
recommend=$(echo "$i" | awk -F "-" '{ print $2 }' | awk -F ":" '{ print $2 }')
|
||||
size=${end::-1}
|
||||
unit=${end: -1}
|
||||
if [[ $unit == 'T' ]]; then
|
||||
size=$((size * 1024))
|
||||
fi
|
||||
if [[ $mem_size -lt $size ]]; then
|
||||
echo "$recommend"
|
||||
IFS="$OLDIFS"
|
||||
return
|
||||
fi
|
||||
done
|
||||
IFS="$OLDIFS"
|
||||
}
|
||||
|
||||
# get default crashkernel
|
||||
# $1 dump mode, if not specified, dump_mode will be judged by is_fadump_capable
|
||||
kdump_get_arch_recommend_crashkernel()
|
||||
{
|
||||
local _arch _ck_cmdline _dump_mode
|
||||
|
||||
if [[ -z "$1" ]]; then
|
||||
if is_fadump_capable; then
|
||||
_dump_mode=fadump
|
||||
else
|
||||
_dump_mode=kdump
|
||||
fi
|
||||
else
|
||||
_dump_mode=$1
|
||||
fi
|
||||
|
||||
_arch=$(uname -m)
|
||||
|
||||
if [[ $_arch == "x86_64" ]] || [[ $_arch == "s390x" ]]; then
|
||||
_ck_cmdline="1G-4G:192M,4G-64G:256M,64G-:512M"
|
||||
elif [[ $_arch == "aarch64" ]]; then
|
||||
_ck_cmdline="2G-:448M"
|
||||
elif [[ $_arch == "ppc64le" ]]; then
|
||||
if [[ $_dump_mode == "fadump" ]]; then
|
||||
_ck_cmdline="4G-16G:768M,16G-64G:1G,64G-128G:2G,128G-1T:4G,1T-2T:6G,2T-4T:12G,4T-8T:20G,8T-16T:36G,16T-32T:64G,32T-64T:128G,64T-:180G"
|
||||
else
|
||||
_ck_cmdline="2G-4G:384M,4G-16G:512M,16G-64G:1G,64G-128G:2G,128G-:4G"
|
||||
fi
|
||||
fi
|
||||
|
||||
echo -n "$_ck_cmdline"
|
||||
}
|
||||
|
||||
# return recommended size based on current system RAM size
|
||||
# $1: kernel version, if not set, will defaults to $(uname -r)
|
||||
kdump_get_arch_recommend_size()
|
||||
{
|
||||
local _ck_cmdline _sys_mem
|
||||
|
||||
if ! [[ -r "/proc/iomem" ]]; then
|
||||
echo "Error, can not access /proc/iomem."
|
||||
return 1
|
||||
fi
|
||||
_sys_mem=$(get_system_size)
|
||||
_ck_cmdline=$(kdump_get_arch_recommend_crashkernel)
|
||||
_ck_cmdline=${_ck_cmdline//-:/-102400T:}
|
||||
get_recommend_size "$_sys_mem" "$_ck_cmdline"
|
||||
}
|
||||
|
||||
# Print all underlying crypt devices of a block device
|
||||
# print nothing if device is not on top of a crypt device
|
||||
# $1: the block device to be checked in maj:min format
|
||||
get_luks_crypt_dev()
|
||||
{
|
||||
local _type
|
||||
|
||||
[[ -b /dev/block/$1 ]] || return 1
|
||||
|
||||
_type=$(eval "$(blkid -u filesystem,crypto -o export -- "/dev/block/$1"); echo \$TYPE")
|
||||
[[ $_type == "crypto_LUKS" ]] && echo "$1"
|
||||
|
||||
for _x in "/sys/dev/block/$1/slaves/"*; do
|
||||
[[ -f $_x/dev ]] || continue
|
||||
[[ $_x/subsystem -ef /sys/class/block ]] || continue
|
||||
get_luks_crypt_dev "$(< "$_x/dev")"
|
||||
done
|
||||
}
|
||||
|
||||
# kdump_get_maj_min <device>
|
||||
# Prints the major and minor of a device node.
|
||||
# Example:
|
||||
# $ get_maj_min /dev/sda2
|
||||
# 8:2
|
||||
kdump_get_maj_min()
|
||||
{
|
||||
local _majmin
|
||||
_majmin="$(stat -L -c '%t:%T' "$1" 2> /dev/null)"
|
||||
printf "%s" "$((0x${_majmin%:*})):$((0x${_majmin#*:}))"
|
||||
}
|
||||
|
||||
get_all_kdump_crypt_dev()
|
||||
{
|
||||
local _dev
|
||||
|
||||
for _dev in $(get_block_dump_target); do
|
||||
get_luks_crypt_dev "$(kdump_get_maj_min "$_dev")"
|
||||
done
|
||||
}
|
||||
|
||||
check_vmlinux()
|
||||
{
|
||||
# Use readelf to check if it's a valid ELF
|
||||
readelf -h "$1" &> /dev/null || return 1
|
||||
}
|
||||
|
||||
get_vmlinux_size()
|
||||
{
|
||||
local size=0 _msize
|
||||
|
||||
while read -r _msize; do
|
||||
size=$((size + _msize))
|
||||
done <<< "$(readelf -l -W "$1" | awk '/^ LOAD/{print $6}' 2> /dev/stderr)"
|
||||
|
||||
echo $size
|
||||
}
|
||||
|
||||
try_decompress()
|
||||
{
|
||||
# The obscure use of the "tr" filter is to work around older versions of
|
||||
# "grep" that report the byte offset of the line instead of the pattern.
|
||||
|
||||
# Try to find the header ($1) and decompress from here
|
||||
for pos in $(tr "$1\n$2" "\n$2=" < "$4" | grep -abo "^$2"); do
|
||||
if ! type -P "$3" > /dev/null; then
|
||||
ddebug "Signiature detected but '$3' is missing, skip this decompressor"
|
||||
break
|
||||
fi
|
||||
|
||||
pos=${pos%%:*}
|
||||
tail "-c+$pos" "$img" | $3 > "$5" 2> /dev/null
|
||||
if check_vmlinux "$5"; then
|
||||
ddebug "Kernel is extracted with '$3'"
|
||||
return 0
|
||||
fi
|
||||
done
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
# Borrowed from linux/scripts/extract-vmlinux
|
||||
get_kernel_size()
|
||||
{
|
||||
# Prepare temp files:
|
||||
local tmp img=$1
|
||||
|
||||
tmp=$(mktemp /tmp/vmlinux-XXX)
|
||||
trap 'rm -f "$tmp"' 0
|
||||
|
||||
# Try to check if it's a vmlinux already
|
||||
check_vmlinux "$img" && get_vmlinux_size "$img" && return 0
|
||||
|
||||
# That didn't work, so retry after decompression.
|
||||
try_decompress '\037\213\010' xy gunzip "$img" "$tmp" ||
|
||||
try_decompress '\3757zXZ\000' abcde unxz "$img" "$tmp" ||
|
||||
try_decompress 'BZh' xy bunzip2 "$img" "$tmp" ||
|
||||
try_decompress '\135\0\0\0' xxx unlzma "$img" "$tmp" ||
|
||||
try_decompress '\211\114\132' xy 'lzop -d' "$img" "$tmp" ||
|
||||
try_decompress '\002!L\030' xxx 'lz4 -d' "$img" "$tmp" ||
|
||||
try_decompress '(\265/\375' xxx unzstd "$img" "$tmp"
|
||||
|
||||
# Finally check for uncompressed images or objects:
|
||||
[[ $? -eq 0 ]] && get_vmlinux_size "$tmp" && return 0
|
||||
|
||||
# Fallback to use iomem
|
||||
local _size=0 _seg
|
||||
while read -r _seg; do
|
||||
_size=$((_size + 0x${_seg#*-} - 0x${_seg%-*}))
|
||||
done <<< "$(grep -E "Kernel (code|rodata|data|bss)" /proc/iomem | cut -d ":" -f 1)"
|
||||
echo $_size
|
||||
}
|
||||
355
SOURCES/kdump-logger.sh
Executable file
355
SOURCES/kdump-logger.sh
Executable file
@ -0,0 +1,355 @@
|
||||
#!/bin/sh
|
||||
#
|
||||
# This comes from the dracut-logger.sh
|
||||
#
|
||||
# The logger defined 4 logging levels:
|
||||
# - ddebug (4)
|
||||
# The DEBUG Level designates fine-grained informational events that are most
|
||||
# useful to debug an application.
|
||||
# - dinfo (3)
|
||||
# The INFO level designates informational messages that highlight the
|
||||
# progress of the application at coarse-grained level.
|
||||
# - dwarn (2)
|
||||
# The WARN level designates potentially harmful situations.
|
||||
# - derror (1)
|
||||
# The ERROR level designates error events that might still allow the
|
||||
# application to continue running.
|
||||
#
|
||||
# Logging is controlled by following global variables:
|
||||
# - @var kdump_stdloglvl - logging level to standard error (console output)
|
||||
# - @var kdump_sysloglvl - logging level to syslog (by logger command)
|
||||
# - @var kdump_kmsgloglvl - logging level to /dev/kmsg (only for boot-time)
|
||||
#
|
||||
# If any of the variables is not set, the function dlog_init() sets it to default:
|
||||
# - In the first kernel:
|
||||
# - @var kdump_stdloglvl = 3 (info)
|
||||
# - @var kdump_sysloglvl = 0 (no logging)
|
||||
# - @var kdump_kmsgloglvl = 0 (no logging)
|
||||
#
|
||||
# -In the second kernel:
|
||||
# - @var kdump_stdloglvl = 0 (no logging)
|
||||
# - @var kdump_sysloglvl = 3 (info)
|
||||
# - @var kdump_kmsgloglvl = 0 (no logging)
|
||||
#
|
||||
# First of all you have to start with dlog_init() function which initializes
|
||||
# required variables. Don't call any other logging function before that one!
|
||||
#
|
||||
# The code in this file might be run in an environment without bash.
|
||||
# Any code added must be POSIX compliant.
|
||||
|
||||
# Define vairables for the log levels in this module.
|
||||
kdump_stdloglvl=""
|
||||
kdump_sysloglvl=""
|
||||
kdump_kmsgloglvl=""
|
||||
|
||||
# The dracut-lib.sh is only available in the second kernel, and it won't
|
||||
# be used in the first kernel because the dracut-lib.sh is invisible in
|
||||
# the first kernel.
|
||||
if [ -f /lib/dracut-lib.sh ]; then
|
||||
. /lib/dracut-lib.sh
|
||||
fi
|
||||
|
||||
# @brief Get the log level from kernel command line.
|
||||
# @retval 1 if something has gone wrong
|
||||
# @retval 0 on success.
|
||||
#
|
||||
get_kdump_loglvl()
|
||||
{
|
||||
[ -f /lib/dracut-lib.sh ] && kdump_sysloglvl=$(getarg rd.kdumploglvl)
|
||||
[ -z "$kdump_sysloglvl" ] && return 1;
|
||||
|
||||
if [ -f /lib/dracut-lib.sh ] && ! isdigit "$kdump_sysloglvl"; then
|
||||
return 1
|
||||
fi
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
# @brief Check the log level.
|
||||
# @retval 1 if something has gone wrong
|
||||
# @retval 0 on success.
|
||||
#
|
||||
check_loglvl()
|
||||
{
|
||||
case "$1" in
|
||||
0|1|2|3|4)
|
||||
return 0
|
||||
;;
|
||||
*)
|
||||
return 1
|
||||
;;
|
||||
esac
|
||||
}
|
||||
|
||||
# @brief Initializes Logger.
|
||||
# @retval 1 if something has gone wrong
|
||||
# @retval 0 on success.
|
||||
#
|
||||
dlog_init() {
|
||||
ret=0
|
||||
|
||||
if [ -s /proc/vmcore ];then
|
||||
if ! get_kdump_loglvl; then
|
||||
logger -t "kdump[$$]" -p warn -- "Kdump is using the default log level(3)."
|
||||
kdump_sysloglvl=3
|
||||
fi
|
||||
kdump_stdloglvl=0
|
||||
kdump_kmsgloglvl=0
|
||||
else
|
||||
kdump_stdloglvl=$KDUMP_STDLOGLVL
|
||||
kdump_sysloglvl=$KDUMP_SYSLOGLVL
|
||||
kdump_kmsgloglvl=$KDUMP_KMSGLOGLVL
|
||||
fi
|
||||
|
||||
[ -z "$kdump_stdloglvl" ] && kdump_stdloglvl=3
|
||||
[ -z "$kdump_sysloglvl" ] && kdump_sysloglvl=0
|
||||
[ -z "$kdump_kmsgloglvl" ] && kdump_kmsgloglvl=0
|
||||
|
||||
for loglvl in "$kdump_stdloglvl" "$kdump_kmsgloglvl" "$kdump_sysloglvl"; do
|
||||
if ! check_loglvl "$loglvl"; then
|
||||
echo "Illegal log level: $kdump_stdloglvl $kdump_kmsgloglvl $kdump_sysloglvl"
|
||||
return 1
|
||||
fi
|
||||
done
|
||||
|
||||
# Skip initialization if it's already done.
|
||||
[ -n "$kdump_maxloglvl" ] && return 0
|
||||
|
||||
if [ "$UID" -ne 0 ]; then
|
||||
kdump_kmsgloglvl=0
|
||||
kdump_sysloglvl=0
|
||||
fi
|
||||
|
||||
if [ "$kdump_sysloglvl" -gt 0 ]; then
|
||||
if [ -d /run/systemd/journal ] \
|
||||
&& systemd-cat --version 1>/dev/null 2>&1 \
|
||||
&& systemctl --quiet is-active systemd-journald.socket 1>/dev/null 2>&1; then
|
||||
readonly _systemdcatfile="/var/tmp/systemd-cat"
|
||||
mkfifo "$_systemdcatfile" 1>/dev/null 2>&1
|
||||
readonly _dlogfd=15
|
||||
systemd-cat -t 'kdump' --level-prefix=true <"$_systemdcatfile" &
|
||||
exec 15>"$_systemdcatfile"
|
||||
elif ! [ -S /dev/log ] && [ -w /dev/log ] || ! command -v logger >/dev/null; then
|
||||
# We cannot log to syslog, so turn this facility off.
|
||||
kdump_kmsgloglvl=$kdump_sysloglvl
|
||||
kdump_sysloglvl=0
|
||||
ret=1
|
||||
errmsg="No '/dev/log' or 'logger' included for syslog logging"
|
||||
fi
|
||||
fi
|
||||
|
||||
kdump_maxloglvl=0
|
||||
for _dlog_lvl in $kdump_stdloglvl $kdump_sysloglvl $kdump_kmsgloglvl; do
|
||||
[ $_dlog_lvl -gt $kdump_maxloglvl ] && kdump_maxloglvl=$_dlog_lvl
|
||||
done
|
||||
readonly kdump_maxloglvl
|
||||
export kdump_maxloglvl
|
||||
|
||||
if [ $kdump_stdloglvl -lt 4 ] && [ $kdump_kmsgloglvl -lt 4 ] && [ $kdump_sysloglvl -lt 4 ]; then
|
||||
unset ddebug
|
||||
ddebug() { :; };
|
||||
fi
|
||||
|
||||
if [ $kdump_stdloglvl -lt 3 ] && [ $kdump_kmsgloglvl -lt 3 ] && [ $kdump_sysloglvl -lt 3 ]; then
|
||||
unset dinfo
|
||||
dinfo() { :; };
|
||||
fi
|
||||
|
||||
if [ $kdump_stdloglvl -lt 2 ] && [ $kdump_kmsgloglvl -lt 2 ] && [ $kdump_sysloglvl -lt 2 ]; then
|
||||
unset dwarn
|
||||
dwarn() { :; };
|
||||
unset dwarning
|
||||
dwarning() { :; };
|
||||
fi
|
||||
|
||||
if [ $kdump_stdloglvl -lt 1 ] && [ $kdump_kmsgloglvl -lt 1 ] && [ $kdump_sysloglvl -lt 1 ]; then
|
||||
unset derror
|
||||
derror() { :; };
|
||||
fi
|
||||
|
||||
[ -n "$errmsg" ] && derror "$errmsg"
|
||||
|
||||
return $ret
|
||||
}
|
||||
|
||||
## @brief Converts numeric level to logger priority defined by POSIX.2.
|
||||
#
|
||||
# @param $1: Numeric logging level in range from 1 to 4.
|
||||
# @retval 1 if @a lvl is out of range.
|
||||
# @retval 0 if @a lvl is correct.
|
||||
# @result Echoes logger priority.
|
||||
_lvl2syspri() {
|
||||
case "$1" in
|
||||
1) echo error;;
|
||||
2) echo warning;;
|
||||
3) echo info;;
|
||||
4) echo debug;;
|
||||
*) return 1;;
|
||||
esac
|
||||
}
|
||||
|
||||
## @brief Converts logger numeric level to syslog log level
|
||||
#
|
||||
# @param $1: Numeric logging level in range from 1 to 4.
|
||||
# @retval 1 if @a lvl is out of range.
|
||||
# @retval 0 if @a lvl is correct.
|
||||
# @result Echoes kernel console numeric log level
|
||||
#
|
||||
# Conversion is done as follows:
|
||||
#
|
||||
# <tt>
|
||||
# none -> LOG_EMERG (0)
|
||||
# none -> LOG_ALERT (1)
|
||||
# none -> LOG_CRIT (2)
|
||||
# ERROR(1) -> LOG_ERR (3)
|
||||
# WARN(2) -> LOG_WARNING (4)
|
||||
# none -> LOG_NOTICE (5)
|
||||
# INFO(3) -> LOG_INFO (6)
|
||||
# DEBUG(4) -> LOG_DEBUG (7)
|
||||
# </tt>
|
||||
#
|
||||
# @see /usr/include/sys/syslog.h
|
||||
_dlvl2syslvl() {
|
||||
case "$1" in
|
||||
1) set -- 3;;
|
||||
2) set -- 4;;
|
||||
3) set -- 6;;
|
||||
4) set -- 7;;
|
||||
*) return 1;;
|
||||
esac
|
||||
|
||||
# The number is constructed by multiplying the facility by 8 and then
|
||||
# adding the level.
|
||||
# About The Syslog Protocol, please refer to the RFC5424 for more details.
|
||||
echo $((24 + $1))
|
||||
}
|
||||
|
||||
## @brief Prints to stderr, to syslog and/or /dev/kmsg given message with
|
||||
# given level (priority).
|
||||
#
|
||||
# @param $1: Numeric logging level.
|
||||
# @param $2: Message.
|
||||
# @retval 0 It's always returned, even if logging failed.
|
||||
#
|
||||
# @note This function is not supposed to be called manually. Please use
|
||||
# dinfo(), ddebug(), or others instead which wrap this one.
|
||||
#
|
||||
# This is core logging function which logs given message to standard error
|
||||
# and/or syslog (with POSIX shell command <tt>logger</tt>) and/or to /dev/kmsg.
|
||||
# The format is following:
|
||||
#
|
||||
# <tt>X: some message</tt>
|
||||
#
|
||||
# where @c X is the first letter of logging level. See module description for
|
||||
# details on that.
|
||||
#
|
||||
# Message to syslog is sent with tag @c kdump. Priorities are mapped as
|
||||
# following:
|
||||
# - @c ERROR to @c error
|
||||
# - @c WARN to @c warning
|
||||
# - @c INFO to @c info
|
||||
# - @c DEBUG to @c debug
|
||||
_do_dlog() {
|
||||
[ "$1" -le $kdump_stdloglvl ] && printf -- 'kdump: %s\n' "$2" >&2
|
||||
|
||||
if [ "$1" -le $kdump_sysloglvl ]; then
|
||||
if [ "$_dlogfd" ]; then
|
||||
printf -- "<%s>%s\n" "$(($(_dlvl2syslvl "$1") & 7))" "$2" 1>&$_dlogfd
|
||||
else
|
||||
logger -t "kdump[$$]" -p "$(_lvl2syspri "$1")" -- "$2"
|
||||
fi
|
||||
fi
|
||||
|
||||
[ "$1" -le $kdump_kmsgloglvl ] && \
|
||||
echo "<$(_dlvl2syslvl "$1")>kdump[$$] $2" >/dev/kmsg
|
||||
}
|
||||
|
||||
## @brief Internal helper function for _do_dlog()
|
||||
#
|
||||
# @param $1: Numeric logging level.
|
||||
# @param $2 [...]: Message.
|
||||
# @retval 0 It's always returned, even if logging failed.
|
||||
#
|
||||
# @note This function is not supposed to be called manually. Please use
|
||||
# dinfo(), ddebug(), or others instead which wrap this one.
|
||||
#
|
||||
# This function calls _do_dlog() either with parameter msg, or if
|
||||
# none is given, it will read standard input and will use every line as
|
||||
# a message.
|
||||
#
|
||||
# This enables:
|
||||
# dwarn "This is a warning"
|
||||
# echo "This is a warning" | dwarn
|
||||
dlog() {
|
||||
[ -z "$kdump_maxloglvl" ] && return 0
|
||||
[ "$1" -le "$kdump_maxloglvl" ] || return 0
|
||||
|
||||
if [ $# -gt 1 ]; then
|
||||
_dlog_lvl=$1; shift
|
||||
_do_dlog "$_dlog_lvl" "$*"
|
||||
else
|
||||
while read -r line || [ -n "$line" ]; do
|
||||
_do_dlog "$1" "$line"
|
||||
done
|
||||
fi
|
||||
}
|
||||
|
||||
## @brief Logs message at DEBUG level (4)
|
||||
#
|
||||
# @param msg Message.
|
||||
# @retval 0 It's always returned, even if logging failed.
|
||||
ddebug() {
|
||||
set +x
|
||||
dlog 4 "$@"
|
||||
if [ -n "$debug" ]; then
|
||||
set -x
|
||||
fi
|
||||
}
|
||||
|
||||
## @brief Logs message at INFO level (3)
|
||||
#
|
||||
# @param msg Message.
|
||||
# @retval 0 It's always returned, even if logging failed.
|
||||
dinfo() {
|
||||
set +x
|
||||
dlog 3 "$@"
|
||||
if [ -n "$debug" ]; then
|
||||
set -x
|
||||
fi
|
||||
}
|
||||
|
||||
## @brief Logs message at WARN level (2)
|
||||
#
|
||||
# @param msg Message.
|
||||
# @retval 0 It's always returned, even if logging failed.
|
||||
dwarn() {
|
||||
set +x
|
||||
dlog 2 "$@"
|
||||
if [ -n "$debug" ]; then
|
||||
set -x
|
||||
fi
|
||||
}
|
||||
|
||||
## @brief It's an alias to dwarn() function.
|
||||
#
|
||||
# @param msg Message.
|
||||
# @retval 0 It's always returned, even if logging failed.
|
||||
dwarning() {
|
||||
set +x
|
||||
dwarn "$@"
|
||||
if [ -n "$debug" ]; then
|
||||
set -x
|
||||
fi
|
||||
}
|
||||
|
||||
## @brief Logs message at ERROR level (1)
|
||||
#
|
||||
# @param msg Message.
|
||||
# @retval 0 It's always returned, even if logging failed.
|
||||
derror() {
|
||||
set +x
|
||||
dlog 1 "$@"
|
||||
if [ -n "$debug" ]; then
|
||||
set -x
|
||||
fi
|
||||
}
|
||||
8
SOURCES/kdump-migrate-action.sh
Executable file
8
SOURCES/kdump-migrate-action.sh
Executable file
@ -0,0 +1,8 @@
|
||||
#!/bin/sh
|
||||
|
||||
systemctl is-active kdump
|
||||
if [ $? -ne 0 ]; then
|
||||
exit 0
|
||||
fi
|
||||
|
||||
/usr/lib/kdump/kdump-restart.sh
|
||||
8
SOURCES/kdump-restart.sh
Normal file
8
SOURCES/kdump-restart.sh
Normal file
@ -0,0 +1,8 @@
|
||||
#!/bin/bash
|
||||
export PATH="$PATH:/usr/bin:/usr/sbin"
|
||||
|
||||
exec >>/var/log/kdump-migration.log 2>&1
|
||||
|
||||
echo "kdump: Partition Migration detected. Rebuilding initramfs image to reload."
|
||||
/usr/bin/kdumpctl rebuild
|
||||
/usr/bin/kdumpctl reload
|
||||
42
SOURCES/kdump-udev-throttler
Executable file
42
SOURCES/kdump-udev-throttler
Executable file
@ -0,0 +1,42 @@
|
||||
#!/bin/bash
|
||||
# This util helps to reduce the workload of kdump service restarting
|
||||
# on udev event. When hotplugging memory / CPU, multiple udev
|
||||
# events may be triggered concurrently, and obviously, we don't want
|
||||
# to restart kdump service for each event.
|
||||
|
||||
# This script will be called by udev, and make sure kdump service is
|
||||
# restart after all events we are watching are settled.
|
||||
|
||||
# On each call, this script will update try to aquire the $throttle_lock
|
||||
# The first instance acquired the file lock will keep waiting for events
|
||||
# to settle and then reload kdump. Other instances will just exit
|
||||
# In this way, we can make sure kdump service is restarted immediately
|
||||
# and for exactly once after udev events are settled.
|
||||
|
||||
throttle_lock="/var/lock/kdump-udev-throttle"
|
||||
|
||||
exec 9>$throttle_lock
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "Failed to create the lock file! Fallback to non-throttled kdump service restart"
|
||||
/bin/kdumpctl reload
|
||||
exit 1
|
||||
fi
|
||||
|
||||
flock -n 9
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "Throttling kdump restart for concurrent udev event"
|
||||
exit 0
|
||||
fi
|
||||
|
||||
# Wait for at least 1 second, at most 4 seconds for udev to settle
|
||||
# Idealy we will have a less than 1 second lag between udev events settle
|
||||
# and kdump reload
|
||||
sleep 1 && udevadm settle --timeout 3
|
||||
|
||||
# Release the lock, /bin/kdumpctl will block and make the process
|
||||
# holding two locks at the same time and we might miss some events
|
||||
exec 9>&-
|
||||
|
||||
/bin/kdumpctl reload
|
||||
|
||||
exit 0
|
||||
192
SOURCES/kdump.conf
Normal file
192
SOURCES/kdump.conf
Normal file
@ -0,0 +1,192 @@
|
||||
# This file contains a series of commands to perform (in order) in the kdump
|
||||
# kernel after a kernel crash in the crash kernel(1st kernel) has happened.
|
||||
#
|
||||
# Directives in this file are only applicable to the kdump initramfs, and have
|
||||
# no effect once the root filesystem is mounted and the normal init scripts are
|
||||
# processed.
|
||||
#
|
||||
# Currently, only one dump target and path can be specified. If the dumping to
|
||||
# the configured target fails, the failure action which can be configured via
|
||||
# the "failure_action" directive will be performed.
|
||||
#
|
||||
# Supported options:
|
||||
#
|
||||
# auto_reset_crashkernel <yes|no>
|
||||
# - whether to reset kernel crashkernel to new default value
|
||||
# or not when kexec-tools updates the default crashkernel value and
|
||||
# existing kernels using the old default kernel crashkernel value.
|
||||
# The default value is yes.
|
||||
#
|
||||
# raw <partition>
|
||||
# - Will dd /proc/vmcore into <partition>.
|
||||
# Use persistent device names for partition devices,
|
||||
# such as /dev/vg/<devname>.
|
||||
#
|
||||
# nfs <nfs mount>
|
||||
# - Will mount nfs to <mnt>, and copy /proc/vmcore to
|
||||
# <mnt>/<path>/%HOST-%DATE/, supports DNS.
|
||||
#
|
||||
# ssh <user@server>
|
||||
# - Will save /proc/vmcore to <user@server>:<path>/%HOST-%DATE/,
|
||||
# supports DNS.
|
||||
# NOTE: make sure the user has write permissions on the server.
|
||||
#
|
||||
# sshkey <path>
|
||||
# - Will use the sshkey to do ssh dump.
|
||||
# Specify the path of the ssh key to use when dumping
|
||||
# via ssh. The default value is /root/.ssh/kdump_id_rsa.
|
||||
#
|
||||
# <fs type> <partition>
|
||||
# - Will mount -t <fs type> <partition> <mnt>, and copy
|
||||
# /proc/vmcore to <mnt>/<path>/%HOST_IP-%DATE/.
|
||||
# NOTE: <partition> can be a device node, label or uuid.
|
||||
# It's recommended to use persistent device names
|
||||
# such as /dev/vg/<devname>.
|
||||
# Otherwise it's suggested to use label or uuid.
|
||||
#
|
||||
# path <path>
|
||||
# - "path" represents the file system path in which vmcore
|
||||
# will be saved. If a dump target is specified in
|
||||
# kdump.conf, then "path" is relative to the specified
|
||||
# dump target.
|
||||
#
|
||||
# Interpretation of "path" changes a bit if the user didn't
|
||||
# specify any dump target explicitly in kdump.conf. In this
|
||||
# case, "path" represents the absolute path from root. The
|
||||
# dump target and adjusted path are arrived at automatically
|
||||
# depending on what's mounted in the current system.
|
||||
#
|
||||
# Ignored for raw device dumps. If unset, will use the default
|
||||
# "/var/crash".
|
||||
#
|
||||
# core_collector <command> <options>
|
||||
# - This allows you to specify the command to copy
|
||||
# the vmcore. The default is makedumpfile, which on
|
||||
# some architectures can drastically reduce vmcore size.
|
||||
# See /sbin/makedumpfile --help for a list of options.
|
||||
# Note that the -i and -g options are not needed here,
|
||||
# as the initrd will automatically be populated with a
|
||||
# config file appropriate for the running kernel.
|
||||
# The default core_collector for raw/ssh dump is:
|
||||
# "makedumpfile -F -l --message-level 7 -d 31".
|
||||
# The default core_collector for other targets is:
|
||||
# "makedumpfile -l --message-level 7 -d 31".
|
||||
#
|
||||
# "makedumpfile -F" will create a flattened vmcore.
|
||||
# You need to use "makedumpfile -R" to rearrange the dump data to
|
||||
# a normal dumpfile readable with analysis tools. For example:
|
||||
# "makedumpfile -R vmcore < vmcore.flat".
|
||||
#
|
||||
# For core_collector format details, you can refer to
|
||||
# kexec-kdump-howto.txt or kdump.conf manpage.
|
||||
#
|
||||
# kdump_post <binary | script>
|
||||
# - This directive allows you to run a executable binary
|
||||
# or script after the vmcore dump process terminates.
|
||||
# The exit status of the current dump process is fed to
|
||||
# the executable binary or script as its first argument.
|
||||
# All files under /etc/kdump/post.d are collectively sorted
|
||||
# and executed in lexical order, before binary or script
|
||||
# specified kdump_post parameter is executed.
|
||||
#
|
||||
# kdump_pre <binary | script>
|
||||
# - Works like the "kdump_post" directive, but instead of running
|
||||
# after the dump process, runs immediately before it.
|
||||
# Exit status of this binary is interpreted as follows:
|
||||
# 0 - continue with dump process as usual
|
||||
# non 0 - run the final action (reboot/poweroff/halt)
|
||||
# All files under /etc/kdump/pre.d are collectively sorted and
|
||||
# executed in lexical order, after binary or script specified
|
||||
# kdump_pre parameter is executed.
|
||||
# Even if the binary or script in /etc/kdump/pre.d directory
|
||||
# returns non 0 exit status, the processing is continued.
|
||||
#
|
||||
# extra_bins <binaries | shell scripts>
|
||||
# - This directive allows you to specify additional binaries or
|
||||
# shell scripts to be included in the kdump initrd.
|
||||
# Generally they are useful in conjunction with a kdump_post
|
||||
# or kdump_pre binary or script which depends on these extra_bins.
|
||||
#
|
||||
# extra_modules <module(s)>
|
||||
# - This directive allows you to specify extra kernel modules
|
||||
# that you want to be loaded in the kdump initrd.
|
||||
# Multiple modules can be listed, separated by spaces, and any
|
||||
# dependent modules will automatically be included.
|
||||
#
|
||||
# failure_action <reboot | halt | poweroff | shell | dump_to_rootfs>
|
||||
# - Action to perform in case dumping fails.
|
||||
# reboot: Reboot the system.
|
||||
# halt: Halt the system.
|
||||
# poweroff: Power down the system.
|
||||
# shell: Drop to a bash shell.
|
||||
# Exiting the shell reboots the system by default,
|
||||
# or perform "final_action".
|
||||
# dump_to_rootfs: Dump vmcore to rootfs from initramfs context and
|
||||
# reboot by default or perform "final_action".
|
||||
# Useful when non-root dump target is specified.
|
||||
# The default option is "reboot".
|
||||
#
|
||||
# default <reboot | halt | poweroff | shell | dump_to_rootfs>
|
||||
# - Same as the "failure_action" directive above, but this directive
|
||||
# is obsolete and will be removed in the future.
|
||||
#
|
||||
# final_action <reboot | halt | poweroff>
|
||||
# - Action to perform in case dumping succeeds. Also performed
|
||||
# when "shell" or "dump_to_rootfs" failure action finishes.
|
||||
# Each action is same as the "failure_action" directive above.
|
||||
# The default is "reboot".
|
||||
#
|
||||
# force_rebuild <0 | 1>
|
||||
# - By default, kdump initrd will only be rebuilt when necessary.
|
||||
# Specify 1 to force rebuilding kdump initrd every time when kdump
|
||||
# service starts.
|
||||
#
|
||||
# force_no_rebuild <0 | 1>
|
||||
# - By default, kdump initrd will be rebuilt when necessary.
|
||||
# Specify 1 to bypass rebuilding of kdump initrd.
|
||||
#
|
||||
# force_no_rebuild and force_rebuild options are mutually
|
||||
# exclusive and they should not be set to 1 simultaneously.
|
||||
#
|
||||
# override_resettable <0 | 1>
|
||||
# - Usually an unresettable block device can't be a dump target.
|
||||
# Specifying 1 when you want to dump even though the block
|
||||
# target is unresettable
|
||||
# By default, it is 0, which will not try dumping destined to fail.
|
||||
#
|
||||
# dracut_args <arg(s)>
|
||||
# - Pass extra dracut options when rebuilding kdump initrd.
|
||||
#
|
||||
# fence_kdump_args <arg(s)>
|
||||
# - Command line arguments for fence_kdump_send (it can contain
|
||||
# all valid arguments except hosts to send notification to).
|
||||
#
|
||||
# fence_kdump_nodes <node(s)>
|
||||
# - List of cluster node(s) except localhost, separated by spaces,
|
||||
# to send fence_kdump notifications to.
|
||||
# (this option is mandatory to enable fence_kdump).
|
||||
#
|
||||
|
||||
#raw /dev/vg/lv_kdump
|
||||
#ext4 /dev/vg/lv_kdump
|
||||
#ext4 LABEL=/boot
|
||||
#ext4 UUID=03138356-5e61-4ab3-b58e-27507ac41937
|
||||
#nfs my.server.com:/export/tmp
|
||||
#nfs [2001:db8::1:2:3:4]:/export/tmp
|
||||
#ssh user@my.server.com
|
||||
#ssh user@2001:db8::1:2:3:4
|
||||
#sshkey /root/.ssh/kdump_id_rsa
|
||||
auto_reset_crashkernel yes
|
||||
path /var/crash
|
||||
core_collector makedumpfile -l --message-level 7 -d 31
|
||||
#core_collector scp
|
||||
#kdump_post /var/crash/scripts/kdump-post.sh
|
||||
#kdump_pre /var/crash/scripts/kdump-pre.sh
|
||||
#extra_bins /usr/bin/lftp
|
||||
#extra_modules gfs2
|
||||
#failure_action shell
|
||||
#force_rebuild 1
|
||||
#force_no_rebuild 1
|
||||
#dracut_args --omit-drivers "cfg80211 snd" --add-drivers "ext2 ext3"
|
||||
#fence_kdump_args -p 7410 -f auto -c 0 -i 10
|
||||
#fence_kdump_nodes node1 node2
|
||||
387
SOURCES/kdump.conf.5
Normal file
387
SOURCES/kdump.conf.5
Normal file
@ -0,0 +1,387 @@
|
||||
.TH KDUMP.CONF 5 "07/23/2008" "kexec-tools"
|
||||
|
||||
.SH NAME
|
||||
kdump.conf \- configuration file for kdump kernel.
|
||||
|
||||
.SH DESCRIPTION
|
||||
|
||||
kdump.conf is a configuration file for the kdump kernel crash
|
||||
collection service.
|
||||
|
||||
kdump.conf provides post-kexec instructions to the kdump kernel. It is
|
||||
stored in the initrd file managed by the kdump service. If you change
|
||||
this file and do not want to reboot in order for the changes to take
|
||||
effect, restart the kdump service to rebuild the initrd.
|
||||
|
||||
For most configurations, you can simply review the examples provided
|
||||
in the stock /etc/kdump.conf.
|
||||
|
||||
.B NOTE:
|
||||
For filesystem dumps the dump target must be mounted before building
|
||||
kdump initramfs.
|
||||
|
||||
kdump.conf only affects the behavior of the initramfs. Please read the
|
||||
kdump operational flow section of kexec-kdump-howto.txt in the docs to better
|
||||
understand how this configuration file affects the behavior of kdump.
|
||||
|
||||
.SH OPTIONS
|
||||
|
||||
.B auto_reset_crashkernel <yes|no>
|
||||
.RS
|
||||
determine whether to reset kernel crashkernel to new default value
|
||||
or not when kexec-tools updates the default crashkernel value and
|
||||
existing kernels using the old default kernel crashkernel value
|
||||
|
||||
.B raw <partition>
|
||||
.RS
|
||||
Will dd /proc/vmcore into <partition>. Use persistent device names for
|
||||
partition devices, such as /dev/vg/<devname>.
|
||||
.RE
|
||||
|
||||
.B nfs <nfs mount>
|
||||
.RS
|
||||
Will mount nfs to <mnt>, and copy /proc/vmcore to <mnt>/<path>/%HOST-%DATE/,
|
||||
supports DNS. Note that a fqdn should be used as the server name in the
|
||||
mount point.
|
||||
.RE
|
||||
|
||||
.B ssh <user@server>
|
||||
.RS
|
||||
Will save /proc/vmcore through ssh pipe to <user@server>:<path>/%HOST-%DATE/,
|
||||
supports DNS. NOTE: make sure user has necessary write permissions on
|
||||
server and that a fqdn is used as the server name.
|
||||
.RE
|
||||
|
||||
.B sshkey <path>
|
||||
.RS
|
||||
Specify the path of the ssh key to use when dumping via ssh.
|
||||
The default value is /root/.ssh/kdump_id_rsa.
|
||||
.RE
|
||||
|
||||
.B <fs type> <partition>
|
||||
.RS
|
||||
Will mount -t <fs type> <partition> <mnt>, and copy /proc/vmcore to
|
||||
<mnt>/<path>/%HOST_IP-%DATE/. NOTE: <partition> can be a device node, label
|
||||
or uuid. It's recommended to use persistent device names such as
|
||||
/dev/vg/<devname>. Otherwise it's suggested to use label or uuid.
|
||||
.RE
|
||||
|
||||
.B path <path>
|
||||
.RS
|
||||
"path" represents the file system path in which vmcore will be saved.
|
||||
If a dump target is specified in kdump.conf, then "path" is relative to the
|
||||
specified dump target.
|
||||
.PP
|
||||
Interpretation of "path" changes a bit if the user didn't specify any dump
|
||||
target explicitly in kdump.conf. In this case, "path" represents the
|
||||
absolute path from root. The dump target and adjusted path are arrived
|
||||
at automatically depending on what's mounted in the current system.
|
||||
.PP
|
||||
Ignored for raw device dumps. If unset, will use the default "/var/crash".
|
||||
.RE
|
||||
|
||||
.B core_collector <command> <options>
|
||||
.RS
|
||||
This allows you to specify the command to copy the vmcore.
|
||||
The default is makedumpfile, which on some architectures can drastically reduce
|
||||
core file size. See /sbin/makedumpfile --help for a list of options.
|
||||
Note that the -i and -g options are not needed here, as the initrd
|
||||
will automatically be populated with a config file appropriate
|
||||
for the running kernel.
|
||||
.PP
|
||||
Note 1: About default core collector:
|
||||
The default core_collector for raw/ssh dump is:
|
||||
"makedumpfile -F -l --message-level 7 -d 31".
|
||||
The default core_collector for other targets is:
|
||||
"makedumpfile -l --message-level 7 -d 31".
|
||||
Even if core_collector option is commented out in kdump.conf, makedumpfile
|
||||
is the default core collector and kdump uses it internally.
|
||||
If one does not want makedumpfile as default core_collector, then they
|
||||
need to specify one using core_collector option to change the behavior.
|
||||
.PP
|
||||
Note 2: If "makedumpfile -F" is used then you will get a flattened format
|
||||
vmcore.flat, you will need to use "makedumpfile -R" to rearrange the
|
||||
dump data from standard input to a normal dumpfile (readable with analysis
|
||||
tools).
|
||||
ie. "makedumpfile -R vmcore < vmcore.flat"
|
||||
.PP
|
||||
Note 3: If specified core_collector simply copy the vmcore file to the
|
||||
dump target (eg: cp, scp), the vmcore could be significantly large.
|
||||
Please make sure the dump target has enough space, at leaset larger
|
||||
than the system's RAM.
|
||||
|
||||
.RE
|
||||
|
||||
.B kdump_post <binary | script>
|
||||
.RS
|
||||
This directive allows you to run a specified executable
|
||||
just after the vmcore dump process terminates. The exit
|
||||
status of the current dump process is fed to the kdump_post
|
||||
executable as its first argument($1). Executable can modify
|
||||
it to indicate the new exit status of succeeding dump process,
|
||||
.PP
|
||||
All files under /etc/kdump/post.d are collectively sorted
|
||||
and executed in lexical order, before binary or script
|
||||
specified kdump_post parameter is executed.
|
||||
.PP
|
||||
Note that scripts written for use with this directive must use the /bin/bash
|
||||
interpreter. And since these scripts run in kdump enviroment, the reference to
|
||||
the storage or network device in the scripts should adhere to the section
|
||||
'Supported dump target types and requirements' in kexec-kdump-howto.txt.
|
||||
|
||||
.RE
|
||||
|
||||
.B kdump_pre <binary | script>
|
||||
.RS
|
||||
Works just like the "kdump_post" directive, but instead
|
||||
of running after the dump process, runs immediately
|
||||
before. Exit status of this binary is interpreted
|
||||
as follows:
|
||||
.PP
|
||||
0 - continue with dump process as usual
|
||||
.PP
|
||||
non 0 - run the final action (reboot/poweroff/halt)
|
||||
.PP
|
||||
All files under /etc/kdump/pre.d are collectively sorted and
|
||||
executed in lexical order, after binary or script specified
|
||||
kdump_pre parameter is executed.
|
||||
Even if the binary or script in /etc/kdump/pre.d directory
|
||||
returns non 0 exit status, the processing is continued.
|
||||
.PP
|
||||
Note that scripts written for use with this directive must use the /bin/bash
|
||||
interpreter. And since these scripts run in kdump enviroment, the reference to
|
||||
the storage or network device in the scripts should adhere to the section
|
||||
'Supported dump target types and requirements' in kexec-kdump-howto.txt.
|
||||
|
||||
.RE
|
||||
|
||||
.B extra_bins <binaries | shell scripts>
|
||||
.RS
|
||||
This directive allows you to specify additional
|
||||
binaries or shell scripts you'd like to include in
|
||||
your kdump initrd. Generally only useful in
|
||||
conjunction with a kdump_post binary or script that
|
||||
relies on other binaries or scripts.
|
||||
.RE
|
||||
|
||||
.B extra_modules <module(s)>
|
||||
.RS
|
||||
This directive allows you to specify extra kernel
|
||||
modules that you want to be loaded in the kdump
|
||||
initrd, typically used to set up access to
|
||||
non-boot-path dump targets that might otherwise
|
||||
not be accessible in the kdump environment. Multiple
|
||||
modules can be listed, separated by spaces, and any
|
||||
dependent modules will automatically be included.
|
||||
.RE
|
||||
|
||||
.B failure_action <reboot | halt | poweroff | shell | dump_to_rootfs>
|
||||
.RS
|
||||
Action to perform in case dumping to the intended target fails. The default is "reboot".
|
||||
reboot: Reboot the system (this is what most people will want, as it returns the system
|
||||
to a normal state). halt: Halt the system and lose the vmcore. poweroff: The system
|
||||
will be powered down. shell: Drop to a shell session inside the initramfs, from which
|
||||
you can manually perform additional recovery actions. Exiting this shell reboots the
|
||||
system by default or performs "final_action".
|
||||
Note: kdump uses bash as the default shell. dump_to_rootfs: If non-root dump
|
||||
target is specified, the failure action can be set as dump_to_rootfs. That means when
|
||||
dumping to target fails, dump vmcore to rootfs from initramfs context and reboot
|
||||
by default or perform "final_action".
|
||||
.RE
|
||||
|
||||
.B default <reboot | halt | poweroff | shell | dump_to_rootfs>
|
||||
.RS
|
||||
Same as the "failure_action" directive above, but this directive is obsolete
|
||||
and will be removed in the future.
|
||||
.RE
|
||||
|
||||
.B final_action <reboot | halt | poweroff>
|
||||
.RS
|
||||
Action to perform in case dumping to the intended target succeeds.
|
||||
Also performed when "shell" or "dump_to_rootfs" failure action finishes.
|
||||
Each action is same as the "failure_action" directive above.
|
||||
The default is "reboot".
|
||||
.RE
|
||||
|
||||
.B force_rebuild <0 | 1>
|
||||
.RS
|
||||
By default, kdump initrd will only be rebuilt when necessary.
|
||||
Specify 1 to force rebuilding kdump initrd every time when kdump service starts.
|
||||
.RE
|
||||
|
||||
.B force_no_rebuild <0 | 1>
|
||||
.RS
|
||||
By default, kdump initrd will be rebuilt when necessary.
|
||||
Specify 1 to bypass rebuilding of kdump initrd.
|
||||
|
||||
.PP
|
||||
force_no_rebuild and force_rebuild options are mutually exclusive and
|
||||
they should not be set to 1 simultaneously.
|
||||
.RE
|
||||
|
||||
.B override_resettable <0 | 1>
|
||||
.RS
|
||||
Usually an unresettable block device can't be a dump target. Specifying 1 means
|
||||
that even though the block target is unresettable, the user wants to try dumping anyway.
|
||||
By default, it's set to 0, which will not try something destined to fail.
|
||||
.RE
|
||||
|
||||
|
||||
.B dracut_args <arg(s)>
|
||||
.RS
|
||||
Kdump uses dracut to generate initramfs for second kernel. This option
|
||||
allows a user to pass arguments to dracut directly.
|
||||
.RE
|
||||
|
||||
|
||||
.B fence_kdump_args <arg(s)>
|
||||
.RS
|
||||
Command line arguments for fence_kdump_send (it can contain all valid
|
||||
arguments except hosts to send notification to).
|
||||
.RE
|
||||
|
||||
|
||||
.B fence_kdump_nodes <node(s)>
|
||||
.RS
|
||||
List of cluster node(s) except localhost, separated by spaces, to send fence_kdump notification
|
||||
to (this option is mandatory to enable fence_kdump).
|
||||
.RE
|
||||
|
||||
|
||||
.SH DEPRECATED OPTIONS
|
||||
|
||||
.B net <nfs mount>|<user@server>
|
||||
.RS
|
||||
net option is replaced by nfs and ssh options. Use nfs or ssh options
|
||||
directly.
|
||||
.RE
|
||||
|
||||
.B options <module> <option list>
|
||||
.RS
|
||||
Use KDUMP_COMMANDLINE_APPEND in /etc/sysconfig/kdump to add module options as
|
||||
kernel command line parameters. For example, specify 'loop.max_loop=1' to limit
|
||||
maximum loop devices to 1.
|
||||
.RE
|
||||
|
||||
.B link_delay <seconds>
|
||||
.RS
|
||||
link_delay was used to wait for a network device to initialize before using it.
|
||||
Now dracut network module takes care of this issue automatically.
|
||||
.RE
|
||||
|
||||
.B disk_timeout <seconds>
|
||||
.RS
|
||||
Similar to link_delay, dracut ensures disks are ready before kdump uses them.
|
||||
.RE
|
||||
|
||||
.B debug_mem_level <0-3>
|
||||
.RS
|
||||
Turn on verbose debug output of kdump scripts regarding free/used memory at
|
||||
various points of execution. This feature has been
|
||||
moved to dracut now.
|
||||
Use KDUMP_COMMANDLINE_APPEND in /etc/sysconfig/kdump and
|
||||
append dracut cmdline param rd.memdebug=[0-3] to enable the debug output.
|
||||
|
||||
Higher level means more debugging output.
|
||||
.PP
|
||||
0 - no output
|
||||
.PP
|
||||
1 - partial /proc/meminfo
|
||||
.PP
|
||||
2 - /proc/meminfo
|
||||
.PP
|
||||
3 - /proc/meminfo + /proc/slabinfo
|
||||
.RE
|
||||
|
||||
.B blacklist <list of kernel modules>
|
||||
.RS
|
||||
blacklist option was recently being used to prevent loading modules in
|
||||
initramfs. General terminology for blacklist has been that module is
|
||||
present in initramfs but it is not actually loaded in kernel. Hence
|
||||
retaining blacklist option creates more confusing behavior. It has been
|
||||
deprecated.
|
||||
.PP
|
||||
Instead, use rd.driver.blacklist option on second kernel to blacklist
|
||||
a certain module. One can edit /etc/sysconfig/kdump.conf and edit
|
||||
KDUMP_COMMANDLINE_APPEND to pass kernel command line options. Refer
|
||||
to dracut.cmdline man page for more details on module blacklist option.
|
||||
.RE
|
||||
|
||||
.RE
|
||||
|
||||
.SH EXAMPLES
|
||||
Here are some examples for core_collector option:
|
||||
.PP
|
||||
Core collector command format depends on dump target type. Typically for
|
||||
filesystem (local/remote), core_collector should accept two arguments.
|
||||
First one is source file and second one is target file. For ex.
|
||||
.TP
|
||||
ex1.
|
||||
core_collector "cp --sparse=always"
|
||||
|
||||
Above will effectively be translated to:
|
||||
|
||||
cp --sparse=always /proc/vmcore <dest-path>/vmcore
|
||||
.TP
|
||||
ex2.
|
||||
core_collector "makedumpfile -l --message-level 7 -d 31"
|
||||
|
||||
Above will effectively be translated to:
|
||||
|
||||
makedumpfile -l --message-level 7 -d 31 /proc/vmcore <dest-path>/vmcore
|
||||
.PP
|
||||
For dump targets like raw and ssh, in general, core collector should expect
|
||||
one argument (source file) and should output the processed core on standard
|
||||
output (There is one exception of "scp", discussed later). This standard
|
||||
output will be saved to destination using appropriate commands.
|
||||
|
||||
raw dumps examples:
|
||||
.TP
|
||||
ex3.
|
||||
core_collector "cat"
|
||||
|
||||
Above will effectively be translated to.
|
||||
|
||||
cat /proc/vmcore | dd of=<target-device>
|
||||
.TP
|
||||
ex4.
|
||||
core_collector "makedumpfile -F -l --message-level 7 -d 31"
|
||||
|
||||
Above will effectively be translated to.
|
||||
|
||||
makedumpfile -F -l --message-level 7 -d 31 | dd of=<target-device>
|
||||
.PP
|
||||
ssh dumps examples
|
||||
.TP
|
||||
ex5.
|
||||
core_collector "cat"
|
||||
|
||||
Above will effectively be translated to.
|
||||
|
||||
cat /proc/vmcore | ssh <options> <remote-location> "dd of=path/vmcore"
|
||||
.TP
|
||||
ex6.
|
||||
core_collector "makedumpfile -F -l --message-level 7 -d 31"
|
||||
|
||||
Above will effectively be translated to.
|
||||
|
||||
makedumpfile -F -l --message-level 7 -d 31 | ssh <options> <remote-location> "dd of=path/vmcore"
|
||||
|
||||
There is one exception to standard output rule for ssh dumps. And that is
|
||||
scp. As scp can handle ssh destinations for file transfers, one can
|
||||
specify "scp" as core collector for ssh targets (no output on stdout).
|
||||
.TP
|
||||
ex7.
|
||||
core_collector "scp"
|
||||
|
||||
Above will effectively be translated to.
|
||||
|
||||
scp /proc/vmcore <user@host>:path/vmcore
|
||||
|
||||
.PP
|
||||
examples for other options please see
|
||||
.I /etc/kdump.conf
|
||||
|
||||
.SH SEE ALSO
|
||||
|
||||
kexec(8) mkdumprd(8) dracut.cmdline(7)
|
||||
16
SOURCES/kdump.service
Normal file
16
SOURCES/kdump.service
Normal file
@ -0,0 +1,16 @@
|
||||
[Unit]
|
||||
Description=Crash recovery kernel arming
|
||||
After=network.target network-online.target remote-fs.target basic.target
|
||||
DefaultDependencies=no
|
||||
ConditionKernelCommandLine=crashkernel
|
||||
|
||||
[Service]
|
||||
Type=oneshot
|
||||
ExecStart=/usr/bin/kdumpctl start
|
||||
ExecStop=/usr/bin/kdumpctl stop
|
||||
ExecReload=/usr/bin/kdumpctl reload
|
||||
RemainAfterExit=yes
|
||||
StartLimitInterval=0
|
||||
|
||||
[Install]
|
||||
WantedBy=multi-user.target
|
||||
53
SOURCES/kdump.sysconfig
Normal file
53
SOURCES/kdump.sysconfig
Normal file
@ -0,0 +1,53 @@
|
||||
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
|
||||
# If no version is specified, then the init script will try to find a
|
||||
# kdump kernel with the same version number as the running kernel.
|
||||
KDUMP_KERNELVER=""
|
||||
|
||||
# The kdump commandline is the command line that needs to be passed off to
|
||||
# the kdump kernel. This will likely match the contents of the grub kernel
|
||||
# line. For example:
|
||||
# KDUMP_COMMANDLINE="ro root=LABEL=/"
|
||||
# Dracut depends on proper root= options, so please make sure that appropriate
|
||||
# root= options are copied from /proc/cmdline. In general it is best to append
|
||||
# command line options using "KDUMP_COMMANDLINE_APPEND=".
|
||||
# If a command line is not specified, the default will be taken from
|
||||
# /proc/cmdline
|
||||
KDUMP_COMMANDLINE=""
|
||||
|
||||
# This variable lets us remove arguments from the current kdump commandline
|
||||
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
|
||||
# NOTE: some arguments such as crashkernel will always be removed
|
||||
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb cma hugetlb_cma"
|
||||
|
||||
# This variable lets us append arguments to the current kdump commandline
|
||||
# after processed by KDUMP_COMMANDLINE_REMOVE
|
||||
KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 reset_devices novmcoredd cma=0 hugetlb_cma=0"
|
||||
|
||||
# Any additional kexec arguments required. In most situations, this should
|
||||
# be left empty
|
||||
#
|
||||
# Example:
|
||||
# KEXEC_ARGS="--elf32-core-headers"
|
||||
KEXEC_ARGS=""
|
||||
|
||||
#Where to find the boot image
|
||||
#KDUMP_BOOTDIR="/boot"
|
||||
|
||||
#What is the image type used for kdump
|
||||
KDUMP_IMG="vmlinuz"
|
||||
|
||||
# Logging is controlled by following variables in the first kernel:
|
||||
# - @var KDUMP_STDLOGLVL - logging level to standard error (console output)
|
||||
# - @var KDUMP_SYSLOGLVL - logging level to syslog (by logger command)
|
||||
# - @var KDUMP_KMSGLOGLVL - logging level to /dev/kmsg (only for boot-time)
|
||||
#
|
||||
# In the second kernel, kdump will use the rd.kdumploglvl option to set the
|
||||
# log level in the above KDUMP_COMMANDLINE_APPEND.
|
||||
# - @var rd.kdumploglvl - logging level to syslog (by logger command)
|
||||
# - for example: add the rd.kdumploglvl=3 option to KDUMP_COMMANDLINE_APPEND
|
||||
#
|
||||
# Logging levels: no logging(0), error(1),warn(2),info(3),debug(4)
|
||||
#
|
||||
# KDUMP_STDLOGLVL=3
|
||||
# KDUMP_SYSLOGLVL=0
|
||||
# KDUMP_KMSGLOGLVL=0
|
||||
53
SOURCES/kdump.sysconfig.aarch64
Normal file
53
SOURCES/kdump.sysconfig.aarch64
Normal file
@ -0,0 +1,53 @@
|
||||
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
|
||||
# If no version is specified, then the init script will try to find a
|
||||
# kdump kernel with the same version number as the running kernel.
|
||||
KDUMP_KERNELVER=""
|
||||
|
||||
# The kdump commandline is the command line that needs to be passed off to
|
||||
# the kdump kernel. This will likely match the contents of the grub kernel
|
||||
# line. For example:
|
||||
# KDUMP_COMMANDLINE="ro root=LABEL=/"
|
||||
# Dracut depends on proper root= options, so please make sure that appropriate
|
||||
# root= options are copied from /proc/cmdline. In general it is best to append
|
||||
# command line options using "KDUMP_COMMANDLINE_APPEND=".
|
||||
# If a command line is not specified, the default will be taken from
|
||||
# /proc/cmdline
|
||||
KDUMP_COMMANDLINE=""
|
||||
|
||||
# This variable lets us remove arguments from the current kdump commandline
|
||||
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
|
||||
# NOTE: some arguments such as crashkernel will always be removed
|
||||
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb cma hugetlb_cma"
|
||||
|
||||
# This variable lets us append arguments to the current kdump commandline
|
||||
# after processed by KDUMP_COMMANDLINE_REMOVE
|
||||
KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory udev.children-max=2 panic=10 swiotlb=noforce novmcoredd cma=0 hugetlb_cma=0"
|
||||
|
||||
# Any additional kexec arguments required. In most situations, this should
|
||||
# be left empty
|
||||
#
|
||||
# Example:
|
||||
# KEXEC_ARGS="--elf32-core-headers"
|
||||
KEXEC_ARGS="-s"
|
||||
|
||||
#Where to find the boot image
|
||||
#KDUMP_BOOTDIR="/boot"
|
||||
|
||||
#What is the image type used for kdump
|
||||
KDUMP_IMG="vmlinuz"
|
||||
|
||||
# Logging is controlled by following variables in the first kernel:
|
||||
# - @var KDUMP_STDLOGLVL - logging level to standard error (console output)
|
||||
# - @var KDUMP_SYSLOGLVL - logging level to syslog (by logger command)
|
||||
# - @var KDUMP_KMSGLOGLVL - logging level to /dev/kmsg (only for boot-time)
|
||||
#
|
||||
# In the second kernel, kdump will use the rd.kdumploglvl option to set the
|
||||
# log level in the above KDUMP_COMMANDLINE_APPEND.
|
||||
# - @var rd.kdumploglvl - logging level to syslog (by logger command)
|
||||
# - for example: add the rd.kdumploglvl=3 option to KDUMP_COMMANDLINE_APPEND
|
||||
#
|
||||
# Logging levels: no logging(0), error(1),warn(2),info(3),debug(4)
|
||||
#
|
||||
# KDUMP_STDLOGLVL=3
|
||||
# KDUMP_SYSLOGLVL=0
|
||||
# KDUMP_KMSGLOGLVL=0
|
||||
56
SOURCES/kdump.sysconfig.i386
Normal file
56
SOURCES/kdump.sysconfig.i386
Normal file
@ -0,0 +1,56 @@
|
||||
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
|
||||
# If no version is specified, then the init script will try to find a
|
||||
# kdump kernel with the same version number as the running kernel.
|
||||
KDUMP_KERNELVER=""
|
||||
|
||||
# The kdump commandline is the command line that needs to be passed off to
|
||||
# the kdump kernel. This will likely match the contents of the grub kernel
|
||||
# line. For example:
|
||||
# KDUMP_COMMANDLINE="ro root=LABEL=/"
|
||||
# Dracut depends on proper root= options, so please make sure that appropriate
|
||||
# root= options are copied from /proc/cmdline. In general it is best to append
|
||||
# command line options using "KDUMP_COMMANDLINE_APPEND=".
|
||||
# If a command line is not specified, the default will be taken from
|
||||
# /proc/cmdline
|
||||
KDUMP_COMMANDLINE=""
|
||||
|
||||
# This variable lets us remove arguments from the current kdump commandline
|
||||
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
|
||||
# NOTE: some arguments such as crashkernel will always be removed
|
||||
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb cma hugetlb_cma"
|
||||
|
||||
# This variable lets us append arguments to the current kdump commandline
|
||||
# after processed by KDUMP_COMMANDLINE_REMOVE
|
||||
KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices numa=off udev.children-max=2 panic=10 transparent_hugepage=never novmcoredd cma=0 hugetlb_cma=0"
|
||||
|
||||
# Any additional kexec arguments required. In most situations, this should
|
||||
# be left empty
|
||||
#
|
||||
# Example:
|
||||
# KEXEC_ARGS="--elf32-core-headers"
|
||||
KEXEC_ARGS=""
|
||||
|
||||
#Where to find the boot image
|
||||
#KDUMP_BOOTDIR="/boot"
|
||||
|
||||
#What is the image type used for kdump
|
||||
KDUMP_IMG="vmlinuz"
|
||||
|
||||
#What is the images extension. Relocatable kernels don't have one
|
||||
KDUMP_IMG_EXT=""
|
||||
|
||||
# Logging is controlled by following variables in the first kernel:
|
||||
# - @var KDUMP_STDLOGLVL - logging level to standard error (console output)
|
||||
# - @var KDUMP_SYSLOGLVL - logging level to syslog (by logger command)
|
||||
# - @var KDUMP_KMSGLOGLVL - logging level to /dev/kmsg (only for boot-time)
|
||||
#
|
||||
# In the second kernel, kdump will use the rd.kdumploglvl option to set the
|
||||
# log level in the above KDUMP_COMMANDLINE_APPEND.
|
||||
# - @var rd.kdumploglvl - logging level to syslog (by logger command)
|
||||
# - for example: add the rd.kdumploglvl=3 option to KDUMP_COMMANDLINE_APPEND
|
||||
#
|
||||
# Logging levels: no logging(0), error(1),warn(2),info(3),debug(4)
|
||||
#
|
||||
# KDUMP_STDLOGLVL=3
|
||||
# KDUMP_SYSLOGLVL=0
|
||||
# KDUMP_KMSGLOGLVL=0
|
||||
58
SOURCES/kdump.sysconfig.ppc64
Normal file
58
SOURCES/kdump.sysconfig.ppc64
Normal file
@ -0,0 +1,58 @@
|
||||
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
|
||||
# If no version is specified, then the init script will try to find a
|
||||
# kdump kernel with the same version number as the running kernel.
|
||||
KDUMP_KERNELVER=""
|
||||
|
||||
# The kdump commandline is the command line that needs to be passed off to
|
||||
# the kdump kernel. This will likely match the contents of the grub kernel
|
||||
# line. For example:
|
||||
# KDUMP_COMMANDLINE="ro root=LABEL=/"
|
||||
# Dracut depends on proper root= options, so please make sure that appropriate
|
||||
# root= options are copied from /proc/cmdline. In general it is best to append
|
||||
# command line options using "KDUMP_COMMANDLINE_APPEND=".
|
||||
# If a command line is not specified, the default will be taken from
|
||||
# /proc/cmdline
|
||||
KDUMP_COMMANDLINE=""
|
||||
|
||||
# This variable lets us remove arguments from the current kdump commandline
|
||||
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
|
||||
# NOTE: some arguments such as crashkernel will always be removed
|
||||
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb hugetlb_cma"
|
||||
|
||||
# This variable lets us append arguments to the current kdump commandline
|
||||
# after processed by KDUMP_COMMANDLINE_REMOVE
|
||||
KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 noirqdistrib reset_devices cgroup_disable=memory numa=off udev.children-max=2 ehea.use_mcs=0 panic=10 kvm_cma_resv_ratio=0 transparent_hugepage=never novmcoredd hugetlb_cma=0"
|
||||
|
||||
# Any additional kexec arguments required. In most situations, this should
|
||||
# be left empty
|
||||
#
|
||||
# Example:
|
||||
# KEXEC_ARGS="--elf32-core-headers"
|
||||
KEXEC_ARGS="--dt-no-old-root"
|
||||
|
||||
#Where to find the boot image
|
||||
#KDUMP_BOOTDIR="/boot"
|
||||
|
||||
#What is the image type used for kdump
|
||||
KDUMP_IMG="vmlinuz"
|
||||
|
||||
#What is the images extension. Relocatable kernels don't have one
|
||||
KDUMP_IMG_EXT=""
|
||||
|
||||
#Specify the action after failure
|
||||
|
||||
# Logging is controlled by following variables in the first kernel:
|
||||
# - @var KDUMP_STDLOGLVL - logging level to standard error (console output)
|
||||
# - @var KDUMP_SYSLOGLVL - logging level to syslog (by logger command)
|
||||
# - @var KDUMP_KMSGLOGLVL - logging level to /dev/kmsg (only for boot-time)
|
||||
#
|
||||
# In the second kernel, kdump will use the rd.kdumploglvl option to set the
|
||||
# log level in the above KDUMP_COMMANDLINE_APPEND.
|
||||
# - @var rd.kdumploglvl - logging level to syslog (by logger command)
|
||||
# - for example: add the rd.kdumploglvl=3 option to KDUMP_COMMANDLINE_APPEND
|
||||
#
|
||||
# Logging levels: no logging(0), error(1),warn(2),info(3),debug(4)
|
||||
#
|
||||
# KDUMP_STDLOGLVL=3
|
||||
# KDUMP_SYSLOGLVL=0
|
||||
# KDUMP_KMSGLOGLVL=0
|
||||
58
SOURCES/kdump.sysconfig.ppc64le
Normal file
58
SOURCES/kdump.sysconfig.ppc64le
Normal file
@ -0,0 +1,58 @@
|
||||
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
|
||||
# If no version is specified, then the init script will try to find a
|
||||
# kdump kernel with the same version number as the running kernel.
|
||||
KDUMP_KERNELVER=""
|
||||
|
||||
# The kdump commandline is the command line that needs to be passed off to
|
||||
# the kdump kernel. This will likely match the contents of the grub kernel
|
||||
# line. For example:
|
||||
# KDUMP_COMMANDLINE="ro root=LABEL=/"
|
||||
# Dracut depends on proper root= options, so please make sure that appropriate
|
||||
# root= options are copied from /proc/cmdline. In general it is best to append
|
||||
# command line options using "KDUMP_COMMANDLINE_APPEND=".
|
||||
# If a command line is not specified, the default will be taken from
|
||||
# /proc/cmdline
|
||||
KDUMP_COMMANDLINE=""
|
||||
|
||||
# This variable lets us remove arguments from the current kdump commandline
|
||||
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
|
||||
# NOTE: some arguments such as crashkernel will always be removed
|
||||
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb hugetlb_cma"
|
||||
|
||||
# This variable lets us append arguments to the current kdump commandline
|
||||
# after processed by KDUMP_COMMANDLINE_REMOVE
|
||||
KDUMP_COMMANDLINE_APPEND="irqpoll maxcpus=1 noirqdistrib reset_devices cgroup_disable=memory numa=off udev.children-max=2 ehea.use_mcs=0 panic=10 kvm_cma_resv_ratio=0 transparent_hugepage=never novmcoredd hugetlb_cma=0"
|
||||
|
||||
# Any additional kexec arguments required. In most situations, this should
|
||||
# be left empty
|
||||
#
|
||||
# Example:
|
||||
# KEXEC_ARGS="--elf32-core-headers"
|
||||
KEXEC_ARGS="--dt-no-old-root -s"
|
||||
|
||||
#Where to find the boot image
|
||||
#KDUMP_BOOTDIR="/boot"
|
||||
|
||||
#What is the image type used for kdump
|
||||
KDUMP_IMG="vmlinuz"
|
||||
|
||||
#What is the images extension. Relocatable kernels don't have one
|
||||
KDUMP_IMG_EXT=""
|
||||
|
||||
#Specify the action after failure
|
||||
|
||||
# Logging is controlled by following variables in the first kernel:
|
||||
# - @var KDUMP_STDLOGLVL - logging level to standard error (console output)
|
||||
# - @var KDUMP_SYSLOGLVL - logging level to syslog (by logger command)
|
||||
# - @var KDUMP_KMSGLOGLVL - logging level to /dev/kmsg (only for boot-time)
|
||||
#
|
||||
# In the second kernel, kdump will use the rd.kdumploglvl option to set the
|
||||
# log level in the above KDUMP_COMMANDLINE_APPEND.
|
||||
# - @var rd.kdumploglvl - logging level to syslog (by logger command)
|
||||
# - for example: add the rd.kdumploglvl=3 option to KDUMP_COMMANDLINE_APPEND
|
||||
#
|
||||
# Logging levels: no logging(0), error(1),warn(2),info(3),debug(4)
|
||||
#
|
||||
# KDUMP_STDLOGLVL=3
|
||||
# KDUMP_SYSLOGLVL=0
|
||||
# KDUMP_KMSGLOGLVL=0
|
||||
59
SOURCES/kdump.sysconfig.s390x
Normal file
59
SOURCES/kdump.sysconfig.s390x
Normal file
@ -0,0 +1,59 @@
|
||||
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
|
||||
# If no version is specified, then the init script will try to find a
|
||||
# kdump kernel with the same version number as the running kernel.
|
||||
KDUMP_KERNELVER=""
|
||||
|
||||
# The kdump commandline is the command line that needs to be passed off to
|
||||
# the kdump kernel. This will likely match the contents of the grub kernel
|
||||
# line. For example:
|
||||
# KDUMP_COMMANDLINE="ro root=LABEL=/"
|
||||
# Dracut depends on proper root= options, so please make sure that appropriate
|
||||
# root= options are copied from /proc/cmdline. In general it is best to append
|
||||
# command line options using "KDUMP_COMMANDLINE_APPEND=".
|
||||
# If a command line is not specified, the default will be taken from
|
||||
# /proc/cmdline
|
||||
KDUMP_COMMANDLINE=""
|
||||
|
||||
# This variable lets us remove arguments from the current kdump commandline
|
||||
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
|
||||
# NOTE: some arguments such as crashkernel will always be removed
|
||||
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb vmcp_cma cma hugetlb_cma prot_virt"
|
||||
|
||||
# This variable lets us append arguments to the current kdump commandline
|
||||
# after processed by KDUMP_COMMANDLINE_REMOVE
|
||||
KDUMP_COMMANDLINE_APPEND="nr_cpus=1 cgroup_disable=memory numa=off udev.children-max=2 panic=10 transparent_hugepage=never novmcoredd vmcp_cma=0 cma=0 hugetlb_cma=0"
|
||||
|
||||
# Any additional /sbin/mkdumprd arguments required.
|
||||
MKDUMPRD_ARGS=""
|
||||
|
||||
# Any additional kexec arguments required. In most situations, this should
|
||||
# be left empty
|
||||
#
|
||||
# Example:
|
||||
# KEXEC_ARGS="--elf32-core-headers"
|
||||
KEXEC_ARGS="-s"
|
||||
|
||||
#Where to find the boot image
|
||||
#KDUMP_BOOTDIR="/boot"
|
||||
|
||||
#What is the image type used for kdump
|
||||
KDUMP_IMG="vmlinuz"
|
||||
|
||||
#What is the images extension. Relocatable kernels don't have one
|
||||
KDUMP_IMG_EXT=""
|
||||
|
||||
# Logging is controlled by following variables in the first kernel:
|
||||
# - @var KDUMP_STDLOGLVL - logging level to standard error (console output)
|
||||
# - @var KDUMP_SYSLOGLVL - logging level to syslog (by logger command)
|
||||
# - @var KDUMP_KMSGLOGLVL - logging level to /dev/kmsg (only for boot-time)
|
||||
#
|
||||
# In the second kernel, kdump will use the rd.kdumploglvl option to set the
|
||||
# log level in the above KDUMP_COMMANDLINE_APPEND.
|
||||
# - @var rd.kdumploglvl - logging level to syslog (by logger command)
|
||||
# - for example: add the rd.kdumploglvl=3 option to KDUMP_COMMANDLINE_APPEND
|
||||
#
|
||||
# Logging levels: no logging(0), error(1),warn(2),info(3),debug(4)
|
||||
#
|
||||
# KDUMP_STDLOGLVL=3
|
||||
# KDUMP_SYSLOGLVL=0
|
||||
# KDUMP_KMSGLOGLVL=0
|
||||
56
SOURCES/kdump.sysconfig.x86_64
Normal file
56
SOURCES/kdump.sysconfig.x86_64
Normal file
@ -0,0 +1,56 @@
|
||||
# Kernel Version string for the -kdump kernel, such as 2.6.13-1544.FC5kdump
|
||||
# If no version is specified, then the init script will try to find a
|
||||
# kdump kernel with the same version number as the running kernel.
|
||||
KDUMP_KERNELVER=""
|
||||
|
||||
# The kdump commandline is the command line that needs to be passed off to
|
||||
# the kdump kernel. This will likely match the contents of the grub kernel
|
||||
# line. For example:
|
||||
# KDUMP_COMMANDLINE="ro root=LABEL=/"
|
||||
# Dracut depends on proper root= options, so please make sure that appropriate
|
||||
# root= options are copied from /proc/cmdline. In general it is best to append
|
||||
# command line options using "KDUMP_COMMANDLINE_APPEND=".
|
||||
# If a command line is not specified, the default will be taken from
|
||||
# /proc/cmdline
|
||||
KDUMP_COMMANDLINE=""
|
||||
|
||||
# This variable lets us remove arguments from the current kdump commandline
|
||||
# as taken from either KDUMP_COMMANDLINE above, or from /proc/cmdline
|
||||
# NOTE: some arguments such as crashkernel will always be removed
|
||||
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb cma hugetlb_cma"
|
||||
|
||||
# This variable lets us append arguments to the current kdump commandline
|
||||
# after processed by KDUMP_COMMANDLINE_REMOVE
|
||||
KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 acpi_no_memhotplug transparent_hugepage=never nokaslr hest_disable novmcoredd cma=0 hugetlb_cma=0"
|
||||
|
||||
# Any additional kexec arguments required. In most situations, this should
|
||||
# be left empty
|
||||
#
|
||||
# Example:
|
||||
# KEXEC_ARGS="--elf32-core-headers"
|
||||
KEXEC_ARGS="-s"
|
||||
|
||||
#Where to find the boot image
|
||||
#KDUMP_BOOTDIR="/boot"
|
||||
|
||||
#What is the image type used for kdump
|
||||
KDUMP_IMG="vmlinuz"
|
||||
|
||||
#What is the images extension. Relocatable kernels don't have one
|
||||
KDUMP_IMG_EXT=""
|
||||
|
||||
# Logging is controlled by following variables in the first kernel:
|
||||
# - @var KDUMP_STDLOGLVL - logging level to standard error (console output)
|
||||
# - @var KDUMP_SYSLOGLVL - logging level to syslog (by logger command)
|
||||
# - @var KDUMP_KMSGLOGLVL - logging level to /dev/kmsg (only for boot-time)
|
||||
#
|
||||
# In the second kernel, kdump will use the rd.kdumploglvl option to set the
|
||||
# log level in the above KDUMP_COMMANDLINE_APPEND.
|
||||
# - @var rd.kdumploglvl - logging level to syslog (by logger command)
|
||||
# - for example: add the rd.kdumploglvl=3 option to KDUMP_COMMANDLINE_APPEND
|
||||
#
|
||||
# Logging levels: no logging(0), error(1),warn(2),info(3),debug(4)
|
||||
#
|
||||
# KDUMP_STDLOGLVL=3
|
||||
# KDUMP_SYSLOGLVL=0
|
||||
# KDUMP_KMSGLOGLVL=0
|
||||
1820
SOURCES/kdumpctl
Executable file
1820
SOURCES/kdumpctl
Executable file
File diff suppressed because it is too large
Load Diff
69
SOURCES/kdumpctl.8
Normal file
69
SOURCES/kdumpctl.8
Normal file
@ -0,0 +1,69 @@
|
||||
.TH KDUMPCTL 8 2015-07-13 kexec-tools
|
||||
|
||||
.SH NAME
|
||||
kdumpctl \- control interface for kdump
|
||||
|
||||
.SH SYNOPSIS
|
||||
.B kdumpctl
|
||||
.I COMMAND
|
||||
|
||||
.SH DESCRIPTION
|
||||
.B kdumpctl
|
||||
is used to check or control the kdump service.
|
||||
In most cases, you should use
|
||||
.B systemctl
|
||||
to start / stop / enable kdump service instead. However,
|
||||
.B kdumpctl
|
||||
provides more details for debug and a helper to setup ssh key authentication.
|
||||
|
||||
.SH COMMANDS
|
||||
.TP
|
||||
.I start
|
||||
Start the service.
|
||||
.TP
|
||||
.I stop
|
||||
Stop the service.
|
||||
.TP
|
||||
.I status
|
||||
Prints the current status of kdump service.
|
||||
It returns non-zero value if kdump is not operational.
|
||||
.TP
|
||||
.I restart
|
||||
Is equal to
|
||||
.I start; stop
|
||||
.TP
|
||||
.I reload
|
||||
reload crash kernel image and initramfs without triggering a rebuild.
|
||||
.TP
|
||||
.I rebuild
|
||||
rebuild the crash kernel initramfs.
|
||||
.TP
|
||||
.I propagate
|
||||
Helps to setup key authentication for ssh storage since it's
|
||||
impossible to use password authentication during kdump.
|
||||
.TP
|
||||
.I showmem
|
||||
Prints the size of reserved memory for crash kernel in megabytes.
|
||||
.TP
|
||||
.I estimate
|
||||
Estimate a suitable crashkernel value for current machine. This is a
|
||||
best-effort estimate. It will print a recommanded crashkernel value
|
||||
based on current kdump setup, and list some details of memory usage.
|
||||
.TP
|
||||
.I reset-crashkernel [--kernel=path_to_kernel] [--reboot]
|
||||
Reset crashkernel to default value recommended by kexec-tools. If no kernel
|
||||
is specified, will reset KDUMP_KERNELVER if it's defined in /etc/sysconfig/kdump
|
||||
or current running kernel's crashkernel value if KDUMP_KERNELVER is empty. You can
|
||||
also specify --kernel=ALL and --kernel=DEFAULT which have the same meaning as
|
||||
grubby's kernel-path=ALL and kernel-path=DEFAULT. ppc64le supports FADump and
|
||||
supports an additonal [--fadump=[on|off|nocma]] parameter to toggle FADump
|
||||
on/off.
|
||||
|
||||
Note: The memory requirements for kdump varies heavily depending on the
|
||||
used hardware and system configuration. Thus the recommended
|
||||
crashkernel might not work for your specific setup. Please test if
|
||||
kdump works after resetting the crashkernel value.
|
||||
|
||||
.SH "SEE ALSO"
|
||||
.BR kdump.conf (5),
|
||||
.BR mkdumprd (8)
|
||||
1047
SOURCES/kexec-kdump-howto.txt
Normal file
1047
SOURCES/kexec-kdump-howto.txt
Normal file
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,95 @@
|
||||
commit 186e7b0752d8fce1618fa37519671c834c46340e
|
||||
Author: Alexander Egorenkov <egorenar@linux.ibm.com>
|
||||
Date: Wed Dec 15 18:48:53 2021 +0100
|
||||
|
||||
s390: handle R_390_PLT32DBL reloc entries in machine_apply_elf_rel()
|
||||
|
||||
Starting with gcc 11.3, the C compiler will generate PLT-relative function
|
||||
calls even if they are local and do not require it. Later on during linking,
|
||||
the linker will replace all PLT-relative calls to local functions with
|
||||
PC-relative ones. Unfortunately, the purgatory code of kexec/kdump is
|
||||
not being linked as a regular executable or shared library would have been,
|
||||
and therefore, all PLT-relative addresses remain in the generated purgatory
|
||||
object code unresolved. This in turn lets kexec-tools fail with
|
||||
"Unknown rela relocation: 0x14 0x73c0901c" for such relocation types.
|
||||
|
||||
Furthermore, the clang C compiler has always behaved like described above
|
||||
and this commit should fix the purgatory code built with the latter.
|
||||
|
||||
Because the purgatory code is no regular executable or shared library,
|
||||
contains only calls to local functions and has no PLT, all R_390_PLT32DBL
|
||||
relocation entries can be resolved just like a R_390_PC32DBL one.
|
||||
|
||||
* https://refspecs.linuxfoundation.org/ELF/zSeries/lzsabi0_zSeries/x1633.html#AEN1699
|
||||
|
||||
Relocation entries of purgatory code generated with gcc 11.3
|
||||
------------------------------------------------------------
|
||||
|
||||
$ readelf -r purgatory/purgatory.o
|
||||
|
||||
Relocation section '.rela.text' at offset 0x6e8 contains 27 entries:
|
||||
Offset Info Type Sym. Value Sym. Name + Addend
|
||||
00000000000c 000300000013 R_390_PC32DBL 0000000000000000 .data + 2
|
||||
00000000001a 001000000014 R_390_PLT32DBL 0000000000000000 sha256_starts + 2
|
||||
000000000030 001100000014 R_390_PLT32DBL 0000000000000000 sha256_update + 2
|
||||
000000000046 001200000014 R_390_PLT32DBL 0000000000000000 sha256_finish + 2
|
||||
000000000050 000300000013 R_390_PC32DBL 0000000000000000 .data + 102
|
||||
00000000005a 001300000014 R_390_PLT32DBL 0000000000000000 memcmp + 2
|
||||
...
|
||||
000000000118 001600000014 R_390_PLT32DBL 0000000000000000 setup_arch + 2
|
||||
00000000011e 000300000013 R_390_PC32DBL 0000000000000000 .data + 2
|
||||
00000000012c 000f00000014 R_390_PLT32DBL 0000000000000000 verify_sha256_digest + 2
|
||||
000000000142 001700000014 R_390_PLT32DBL 0000000000000000
|
||||
post_verification[...] + 2
|
||||
|
||||
Relocation entries of purgatory code generated with gcc 11.2
|
||||
------------------------------------------------------------
|
||||
|
||||
$ readelf -r purgatory/purgatory.o
|
||||
|
||||
Relocation section '.rela.text' at offset 0x6e8 contains 27 entries:
|
||||
Offset Info Type Sym. Value Sym. Name + Addend
|
||||
00000000000e 000300000013 R_390_PC32DBL 0000000000000000 .data + 2
|
||||
00000000001c 001000000013 R_390_PC32DBL 0000000000000000 sha256_starts + 2
|
||||
000000000036 001100000013 R_390_PC32DBL 0000000000000000 sha256_update + 2
|
||||
000000000048 001200000013 R_390_PC32DBL 0000000000000000 sha256_finish + 2
|
||||
000000000052 000300000013 R_390_PC32DBL 0000000000000000 .data + 102
|
||||
00000000005c 001300000013 R_390_PC32DBL 0000000000000000 memcmp + 2
|
||||
...
|
||||
00000000011a 001600000013 R_390_PC32DBL 0000000000000000 setup_arch + 2
|
||||
000000000120 000300000013 R_390_PC32DBL 0000000000000000 .data + 122
|
||||
000000000130 000f00000013 R_390_PC32DBL 0000000000000000 verify_sha256_digest + 2
|
||||
000000000146 001700000013 R_390_PC32DBL 0000000000000000 post_verification[...] + 2
|
||||
|
||||
Corresponding s390 kernel discussion:
|
||||
* https://lore.kernel.org/linux-s390/20211208105801.188140-1-egorenar@linux.ibm.com/T/#u
|
||||
|
||||
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
|
||||
Reported-by: Tao Liu <ltao@redhat.com>
|
||||
Suggested-by: Philipp Rudo <prudo@redhat.com>
|
||||
Reviewed-by: Philipp Rudo <prudo@redhat.com>
|
||||
[hca@linux.ibm.com: changed commit message as requested by Philipp Rudo]
|
||||
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
|
||||
Signed-off-by: Simon Horman <horms@verge.net.au>
|
||||
|
||||
diff --git a/kexec/arch/s390/kexec-elf-rel-s390.c b/kexec/arch/s390/kexec-elf-rel-s390.c
|
||||
index a5e1b73455785ae3bc3aa72b3beee13ae202e82f..91ba86a9991dad4271b834fc3b24861c40309e52 100644
|
||||
--- a/kexec/arch/s390/kexec-elf-rel-s390.c
|
||||
+++ b/kexec/arch/s390/kexec-elf-rel-s390.c
|
||||
@@ -56,6 +56,7 @@ void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
|
||||
case R_390_PC16: /* PC relative 16 bit. */
|
||||
case R_390_PC16DBL: /* PC relative 16 bit shifted by 1. */
|
||||
case R_390_PC32DBL: /* PC relative 32 bit shifted by 1. */
|
||||
+ case R_390_PLT32DBL: /* 32 bit PC rel. PLT shifted by 1. */
|
||||
case R_390_PC32: /* PC relative 32 bit. */
|
||||
case R_390_PC64: /* PC relative 64 bit. */
|
||||
val -= address;
|
||||
@@ -63,7 +64,7 @@ void machine_apply_elf_rel(struct mem_ehdr *UNUSED(ehdr),
|
||||
*(unsigned short *) loc = val;
|
||||
else if (r_type == R_390_PC16DBL)
|
||||
*(unsigned short *) loc = val >> 1;
|
||||
- else if (r_type == R_390_PC32DBL)
|
||||
+ else if (r_type == R_390_PC32DBL || r_type == R_390_PLT32DBL)
|
||||
*(unsigned int *) loc = val >> 1;
|
||||
else if (r_type == R_390_PC32)
|
||||
*(unsigned int *) loc = val;
|
||||
@ -0,0 +1,49 @@
|
||||
From 59b1726fbcc251155140c8a1972384498fee4daf Mon Sep 17 00:00:00 2001
|
||||
From: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
|
||||
Date: Tue, 25 Jan 2022 12:55:15 +0000
|
||||
Subject: [PATCH] [PATCH] sadump, kaslr: fix failure of calculating
|
||||
kaslr_offset
|
||||
|
||||
On kernels v5.8 or later, makedumpfile fails for memory dumps in the
|
||||
sadump-related formats as follows:
|
||||
|
||||
# makedumpfile -f -l -d 31 -x ./vmlinux /dev/sdd4 /root/vmcore-ld31
|
||||
__vtop4_x86_64: Can't get a valid pud_pte.
|
||||
...110 lines of the same message...
|
||||
__vtop4_x86_64: Can't get a valid pud_pte.
|
||||
calc_kaslr_offset: failed to calculate kaslr_offset and phys_base; default to 0
|
||||
readmem: type_addr: 1, addr:ffffffff85411858, size:8
|
||||
__vtop4_x86_64: Can't get pgd (page_dir:ffffffff85411858).
|
||||
readmem: Can't convert a virtual address(ffffffff059be980) to physical address.
|
||||
readmem: type_addr: 0, addr:ffffffff059be980, size:1024
|
||||
cpu_online_mask_init: Can't read cpu_online_mask memory.
|
||||
|
||||
makedumpfile Failed.
|
||||
|
||||
This is caused by the kernel commit 9d06c4027f21 ("x86/entry: Convert
|
||||
Divide Error to IDTENTRY") that renamed divide_error to
|
||||
asm_exc_divide_error, breaking logic for calculating kaslr offset.
|
||||
|
||||
Fix this by adding initialization of asm_exc_divide_error.
|
||||
|
||||
Signed-off-by: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
|
||||
---
|
||||
makedumpfile.c | 2 ++
|
||||
1 file changed, 2 insertions(+)
|
||||
|
||||
diff --git a/makedumpfile-1.7.0/makedumpfile.c b/makedumpfile-1.7.0/makedumpfile.c
|
||||
index a51bdaf..7ed9756 100644
|
||||
--- a/makedumpfile-1.7.0/makedumpfile.c
|
||||
+++ b/makedumpfile-1.7.0/makedumpfile.c
|
||||
@@ -1667,6 +1667,8 @@ get_symbol_info(void)
|
||||
SYMBOL_INIT(cur_cpu_spec, "cur_cpu_spec");
|
||||
|
||||
SYMBOL_INIT(divide_error, "divide_error");
|
||||
+ if (SYMBOL(divide_error) == NOT_FOUND_SYMBOL)
|
||||
+ SYMBOL_INIT(divide_error, "asm_exc_divide_error");
|
||||
SYMBOL_INIT(idt_table, "idt_table");
|
||||
SYMBOL_INIT(saved_command_line, "saved_command_line");
|
||||
SYMBOL_INIT(pti_init, "pti_init");
|
||||
--
|
||||
2.33.1
|
||||
|
||||
25
SOURCES/live-image-kdump-howto.txt
Normal file
25
SOURCES/live-image-kdump-howto.txt
Normal file
@ -0,0 +1,25 @@
|
||||
Kdump now works on live images with some manual configurations. Here is the step
|
||||
by step guide.
|
||||
|
||||
1. Enable crashkernel reservation
|
||||
|
||||
Since there isn't any config file that can be used to configure kernel
|
||||
parameters for live images before booting them, we have to append 'crashkernel'
|
||||
argument in boot menu every time we boot a live image.
|
||||
|
||||
2. Change dump target in /etc/kdump.conf
|
||||
|
||||
When kdump kernel boots in a live environment, the default target /var/crash is
|
||||
in RAM so you need to change the dump target to an external disk or a network
|
||||
dump target.
|
||||
|
||||
Besides, make sure that "default dump_to_rootfs" is not specified.
|
||||
|
||||
3. Start kdump service
|
||||
|
||||
$ kdumpctl start
|
||||
|
||||
4. Trigger a kdump test
|
||||
|
||||
$ echo 1 > /proc/sys/kernel/sysrq
|
||||
$ echo c > /proc/sysrq-trigger
|
||||
469
SOURCES/mkdumprd
Normal file
469
SOURCES/mkdumprd
Normal file
@ -0,0 +1,469 @@
|
||||
#!/bin/bash --norc
|
||||
# New mkdumprd
|
||||
#
|
||||
# Copyright 2011 Red Hat, Inc.
|
||||
#
|
||||
# Written by Cong Wang <amwang@redhat.com>
|
||||
#
|
||||
|
||||
if [[ -f /etc/sysconfig/kdump ]]; then
|
||||
. /etc/sysconfig/kdump
|
||||
fi
|
||||
|
||||
[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
|
||||
. $dracutbasedir/dracut-functions.sh
|
||||
. /lib/kdump/kdump-lib.sh
|
||||
. /lib/kdump/kdump-logger.sh
|
||||
export IN_KDUMP=1
|
||||
|
||||
#initiate the kdump logger
|
||||
if ! dlog_init; then
|
||||
echo "failed to initiate the kdump logger."
|
||||
exit 1
|
||||
fi
|
||||
|
||||
SSH_KEY_LOCATION="/root/.ssh/kdump_id_rsa"
|
||||
SAVE_PATH=$(get_save_path)
|
||||
OVERRIDE_RESETTABLE=0
|
||||
|
||||
extra_modules=""
|
||||
dracut_args=(--add kdumpbase --quiet --hostonly --hostonly-cmdline --hostonly-i18n --hostonly-mode strict -o "plymouth resume ifcfg earlykdump")
|
||||
|
||||
MKDUMPRD_TMPDIR="$(mktemp -d -t mkdumprd.XXXXXX)"
|
||||
[ -d "$MKDUMPRD_TMPDIR" ] || perror_exit "dracut: mktemp -p -d -t dracut.XXXXXX failed."
|
||||
MKDUMPRD_TMPMNT="$MKDUMPRD_TMPDIR/target"
|
||||
|
||||
trap '
|
||||
ret=$?;
|
||||
is_mounted $MKDUMPRD_TMPMNT && umount -f $MKDUMPRD_TMPMNT;
|
||||
[[ -d $MKDUMPRD_TMPDIR ]] && rm --one-file-system -rf -- "$MKDUMPRD_TMPDIR";
|
||||
exit $ret;
|
||||
' EXIT
|
||||
|
||||
# clean up after ourselves no matter how we die.
|
||||
trap 'exit 1;' SIGINT
|
||||
|
||||
add_dracut_arg()
|
||||
{
|
||||
dracut_args+=("$@")
|
||||
}
|
||||
|
||||
add_dracut_mount()
|
||||
{
|
||||
add_dracut_arg "--mount" "$1"
|
||||
}
|
||||
|
||||
add_dracut_sshkey()
|
||||
{
|
||||
add_dracut_arg "--sshkey" "$1"
|
||||
}
|
||||
|
||||
# caller should ensure $1 is valid and mounted in 1st kernel
|
||||
to_mount()
|
||||
{
|
||||
local _target=$1 _fstype=$2 _options=$3 _sed_cmd _new_mntpoint _pdev
|
||||
|
||||
_new_mntpoint=$(get_kdump_mntpoint_from_target "$_target")
|
||||
_fstype="${_fstype:-$(get_fs_type_from_target "$_target")}"
|
||||
_options="${_options:-$(get_mntopt_from_target "$_target")}"
|
||||
_options="${_options:-defaults}"
|
||||
|
||||
if [[ $_fstype == "nfs"* ]]; then
|
||||
_pdev=$_target
|
||||
_sed_cmd+='s/,\(mount\)\?addr=[^,]*//g;'
|
||||
_sed_cmd+='s/,\(mount\)\?proto=[^,]*//g;'
|
||||
_sed_cmd+='s/,clientaddr=[^,]*//;'
|
||||
else
|
||||
# for non-nfs _target converting to use udev persistent name
|
||||
_pdev="$(kdump_get_persistent_dev "$_target")"
|
||||
if [[ -z $_pdev ]]; then
|
||||
return 1
|
||||
fi
|
||||
fi
|
||||
|
||||
# mount fs target as rw in 2nd kernel
|
||||
_sed_cmd+='s/\(^\|,\)ro\($\|,\)/\1rw\2/g;'
|
||||
# with 'noauto' in fstab nfs and non-root disk mount will fail in 2nd
|
||||
# kernel, filter it out here.
|
||||
_sed_cmd+='s/\(^\|,\)noauto\($\|,\)/\1/g;'
|
||||
# drop nofail or nobootwait
|
||||
_sed_cmd+='s/\(^\|,\)nofail\($\|,\)/\1/g;'
|
||||
_sed_cmd+='s/\(^\|,\)nobootwait\($\|,\)/\1/g;'
|
||||
|
||||
_options=$(echo "$_options" | sed "$_sed_cmd")
|
||||
|
||||
echo "$_pdev $_new_mntpoint $_fstype $_options"
|
||||
}
|
||||
|
||||
#Function: get_ssh_size
|
||||
#$1=dump target
|
||||
#called from while loop and shouldn't read from stdin, so we're using "ssh -n"
|
||||
get_ssh_size()
|
||||
{
|
||||
local _out
|
||||
local _opt=("-i" "$SSH_KEY_LOCATION" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=yes")
|
||||
|
||||
if ! _out=$(ssh -q -n "${_opt[@]}" "$1" "df" "--output=avail" "$SAVE_PATH"); then
|
||||
perror_exit "checking remote ssh server available size failed."
|
||||
fi
|
||||
|
||||
echo -n "$_out" | tail -1
|
||||
}
|
||||
|
||||
#mkdir if save path does not exist on ssh dump target
|
||||
#$1=ssh dump target
|
||||
#caller should ensure write permission on $1:$SAVE_PATH
|
||||
#called from while loop and shouldn't read from stdin, so we're using "ssh -n"
|
||||
mkdir_save_path_ssh()
|
||||
{
|
||||
local _opt _dir
|
||||
_opt=(-i "$SSH_KEY_LOCATION" -o BatchMode=yes -o StrictHostKeyChecking=yes)
|
||||
ssh -qn "${_opt[@]}" "$1" mkdir -p "$SAVE_PATH" &> /dev/null ||
|
||||
perror_exit "mkdir failed on $1:$SAVE_PATH"
|
||||
|
||||
# check whether user has write permission on $1:$SAVE_PATH
|
||||
_dir=$(ssh -qn "${_opt[@]}" "$1" mktemp -dqp "$SAVE_PATH" 2> /dev/null) ||
|
||||
perror_exit "Could not create temporary directory on $1:$SAVE_PATH. Make sure user has write permission on destination"
|
||||
ssh -qn "${_opt[@]}" "$1" rmdir "$_dir"
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
#Function: get_fs_size
|
||||
#$1=dump target
|
||||
get_fs_size()
|
||||
{
|
||||
df --output=avail "$(get_mntpoint_from_target "$1")/$SAVE_PATH" | tail -1
|
||||
}
|
||||
|
||||
#Function: get_raw_size
|
||||
#$1=dump target
|
||||
get_raw_size()
|
||||
{
|
||||
fdisk -s "$1"
|
||||
}
|
||||
|
||||
#Function: check_size
|
||||
#$1: dump type string ('raw', 'fs', 'ssh')
|
||||
#$2: dump target
|
||||
check_size()
|
||||
{
|
||||
local avail memtotal
|
||||
|
||||
memtotal=$(awk '/MemTotal/{print $2}' /proc/meminfo)
|
||||
case "$1" in
|
||||
raw)
|
||||
avail=$(get_raw_size "$2")
|
||||
;;
|
||||
ssh)
|
||||
avail=$(get_ssh_size "$2")
|
||||
;;
|
||||
fs)
|
||||
avail=$(get_fs_size "$2")
|
||||
;;
|
||||
*)
|
||||
return
|
||||
;;
|
||||
esac || perror_exit "Check dump target size failed"
|
||||
|
||||
if [[ $avail -lt $memtotal ]]; then
|
||||
dwarn "Warning: There might not be enough space to save a vmcore."
|
||||
dwarn " The size of $2 should be greater than $memtotal kilo bytes."
|
||||
fi
|
||||
}
|
||||
|
||||
check_save_path_fs()
|
||||
{
|
||||
local _path=$1
|
||||
|
||||
if [[ ! -d $_path ]]; then
|
||||
perror_exit "Dump path $_path does not exist."
|
||||
fi
|
||||
}
|
||||
|
||||
mount_failure()
|
||||
{
|
||||
local _target=$1
|
||||
local _mnt=$2
|
||||
local _fstype=$3
|
||||
local msg="Failed to mount $_target"
|
||||
|
||||
if [[ -n $_mnt ]]; then
|
||||
msg="$msg on $_mnt"
|
||||
fi
|
||||
|
||||
msg="$msg for kdump preflight check."
|
||||
|
||||
if [[ $_fstype == "nfs" ]]; then
|
||||
msg="$msg Please make sure nfs-utils has been installed."
|
||||
fi
|
||||
|
||||
perror_exit "$msg"
|
||||
}
|
||||
|
||||
check_user_configured_target()
|
||||
{
|
||||
local _target=$1 _cfg_fs_type=$2 _mounted
|
||||
local _mnt _opt _fstype
|
||||
|
||||
_mnt=$(get_mntpoint_from_target "$_target")
|
||||
_opt=$(get_mntopt_from_target "$_target")
|
||||
_fstype=$(get_fs_type_from_target "$_target")
|
||||
|
||||
if [[ -n $_fstype ]]; then
|
||||
# In case of nfs4, nfs should be used instead, nfs* options is deprecated in kdump.conf
|
||||
[[ $_fstype == "nfs"* ]] && _fstype=nfs
|
||||
|
||||
if [[ -n $_cfg_fs_type ]] && [[ $_fstype != "$_cfg_fs_type" ]]; then
|
||||
perror_exit "\"$_target\" have a wrong type config \"$_cfg_fs_type\", expected \"$_fstype\""
|
||||
fi
|
||||
else
|
||||
_fstype="$_cfg_fs_type"
|
||||
_fstype="$_cfg_fs_type"
|
||||
fi
|
||||
|
||||
# For noauto mount, mount it inplace with default value.
|
||||
# Else use the temporary target directory
|
||||
if [[ -n $_mnt ]]; then
|
||||
if ! is_mounted "$_mnt"; then
|
||||
if [[ $_opt == *",noauto"* ]]; then
|
||||
mount "$_mnt" || mount_failure "$_target" "$_mnt" "$_fstype"
|
||||
_mounted=$_mnt
|
||||
else
|
||||
perror_exit "Dump target \"$_target\" is neither mounted nor configured as \"noauto\""
|
||||
fi
|
||||
fi
|
||||
else
|
||||
_mnt=$MKDUMPRD_TMPMNT
|
||||
mkdir -p "$_mnt"
|
||||
mount "$_target" "$_mnt" -t "$_fstype" -o defaults || mount_failure "$_target" "" "$_fstype"
|
||||
_mounted=$_mnt
|
||||
fi
|
||||
|
||||
# For user configured target, use $SAVE_PATH as the dump path within the target
|
||||
if [[ ! -d "$_mnt/$SAVE_PATH" ]]; then
|
||||
perror_exit "Dump path \"$_mnt/$SAVE_PATH\" does not exist in dump target \"$_target\""
|
||||
fi
|
||||
|
||||
check_size fs "$_target"
|
||||
|
||||
# Unmount it early, if function is interrupted and didn't reach here, the shell trap will clear it up anyway
|
||||
if [[ -n $_mounted ]]; then
|
||||
umount -f -- "$_mounted"
|
||||
fi
|
||||
}
|
||||
|
||||
# $1: core_collector config value
|
||||
verify_core_collector()
|
||||
{
|
||||
local _cmd="${1%% *}"
|
||||
local _params="${1#* }"
|
||||
|
||||
if [[ $_cmd != "makedumpfile" ]]; then
|
||||
if is_raw_dump_target; then
|
||||
dwarn "Warning: specifying a non-makedumpfile core collector, you will have to recover the vmcore manually."
|
||||
fi
|
||||
return
|
||||
fi
|
||||
|
||||
if is_ssh_dump_target || is_raw_dump_target; then
|
||||
if ! strstr "$_params" "-F"; then
|
||||
perror_exit 'The specified dump target needs makedumpfile "-F" option.'
|
||||
fi
|
||||
_params="$_params vmcore"
|
||||
else
|
||||
_params="$_params vmcore dumpfile"
|
||||
fi
|
||||
|
||||
# shellcheck disable=SC2086
|
||||
if ! $_cmd --check-params $_params; then
|
||||
perror_exit "makedumpfile parameter check failed."
|
||||
fi
|
||||
}
|
||||
|
||||
add_mount()
|
||||
{
|
||||
local _mnt
|
||||
|
||||
_mnt=$(to_mount "$@") || exit 1
|
||||
|
||||
add_dracut_mount "$_mnt"
|
||||
}
|
||||
|
||||
#handle the case user does not specify the dump target explicitly
|
||||
handle_default_dump_target()
|
||||
{
|
||||
local _target
|
||||
local _mntpoint
|
||||
|
||||
is_user_configured_dump_target && return
|
||||
|
||||
check_save_path_fs "$SAVE_PATH"
|
||||
|
||||
_save_path=$(get_bind_mount_source "$SAVE_PATH")
|
||||
_target=$(get_target_from_path "$_save_path")
|
||||
_mntpoint=$(get_mntpoint_from_target "$_target")
|
||||
|
||||
SAVE_PATH=${_save_path##"$_mntpoint"}
|
||||
add_mount "$_target"
|
||||
check_size fs "$_target"
|
||||
}
|
||||
|
||||
# $1: function name
|
||||
for_each_block_target()
|
||||
{
|
||||
local dev majmin
|
||||
|
||||
for dev in $(get_kdump_targets); do
|
||||
[[ -b $dev ]] || continue
|
||||
majmin=$(get_maj_min "$dev")
|
||||
check_block_and_slaves "$1" "$majmin" && return 1
|
||||
done
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
#judge if a specific device with $1 is unresettable
|
||||
#return false if unresettable.
|
||||
is_unresettable()
|
||||
{
|
||||
local path device resettable=1
|
||||
|
||||
path="/sys/$(udevadm info --query=all --path="/sys/dev/block/$1" | awk '/^P:/ {print $2}' | sed -e 's/\(cciss[0-9]\+\/\).*/\1/g' -e 's/\/block\/.*$//')/resettable"
|
||||
if [[ -f $path ]]; then
|
||||
resettable="$(< "$path")"
|
||||
[[ $resettable -eq 0 ]] && [[ $OVERRIDE_RESETTABLE -eq 0 ]] && {
|
||||
device=$(udevadm info --query=all --path="/sys/dev/block/$1" | awk -F= '/DEVNAME/{print $2}')
|
||||
derror "Error: Can not save vmcore because device $device is unresettable"
|
||||
return 0
|
||||
}
|
||||
fi
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
#check if machine is resettable.
|
||||
#return true if resettable
|
||||
check_resettable()
|
||||
{
|
||||
local _target _override_resettable
|
||||
|
||||
_override_resettable=$(kdump_get_conf_val override_resettable)
|
||||
OVERRIDE_RESETTABLE=${_override_resettable:-$OVERRIDE_RESETTABLE}
|
||||
if [ "$OVERRIDE_RESETTABLE" != "0" ] && [ "$OVERRIDE_RESETTABLE" != "1" ]; then
|
||||
perror_exit "override_resettable value '$OVERRIDE_RESETTABLE' is invalid"
|
||||
fi
|
||||
|
||||
for_each_block_target is_unresettable && return
|
||||
|
||||
return 1
|
||||
}
|
||||
|
||||
check_crypt()
|
||||
{
|
||||
local _dev
|
||||
|
||||
for _dev in $(get_kdump_targets); do
|
||||
if [[ -n $(get_luks_crypt_dev "$(get_maj_min "$_dev")") ]]; then
|
||||
derror "Device $_dev is encrypted." && return 1
|
||||
fi
|
||||
done
|
||||
}
|
||||
|
||||
if ! check_resettable; then
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if ! check_crypt; then
|
||||
dwarn "Warning: Encrypted device is in dump path, which is not recommended, see kexec-kdump-howto.txt for more details."
|
||||
fi
|
||||
|
||||
# firstly get right SSH_KEY_LOCATION
|
||||
keyfile=$(kdump_get_conf_val sshkey)
|
||||
if [[ -f $keyfile ]]; then
|
||||
# canonicalize the path
|
||||
SSH_KEY_LOCATION=$(/usr/bin/readlink -m "$keyfile")
|
||||
fi
|
||||
|
||||
while read -r config_opt config_val; do
|
||||
# remove inline comments after the end of a directive.
|
||||
case "$config_opt" in
|
||||
extra_modules)
|
||||
extra_modules="$extra_modules $config_val"
|
||||
;;
|
||||
ext[234] | xfs | btrfs | minix | nfs)
|
||||
check_user_configured_target "$config_val" "$config_opt"
|
||||
add_mount "$config_val" "$config_opt"
|
||||
;;
|
||||
raw)
|
||||
# checking raw disk writable
|
||||
dd if="$config_val" count=1 of=/dev/null > /dev/null 2>&1 || {
|
||||
perror_exit "Bad raw disk $config_val"
|
||||
}
|
||||
_praw=$(persistent_policy="by-id" kdump_get_persistent_dev "$config_val")
|
||||
if [[ -z $_praw ]]; then
|
||||
exit 1
|
||||
fi
|
||||
add_dracut_arg "--device" "$_praw"
|
||||
check_size raw "$config_val"
|
||||
;;
|
||||
ssh)
|
||||
if strstr "$config_val" "@"; then
|
||||
mkdir_save_path_ssh "$config_val"
|
||||
check_size ssh "$config_val"
|
||||
add_dracut_sshkey "$SSH_KEY_LOCATION"
|
||||
else
|
||||
perror_exit "Bad ssh dump target $config_val"
|
||||
fi
|
||||
;;
|
||||
core_collector)
|
||||
verify_core_collector "$config_val"
|
||||
;;
|
||||
dracut_args)
|
||||
while read -r dracut_arg; do
|
||||
add_dracut_arg "$dracut_arg"
|
||||
done <<< "$(echo "$config_val" | xargs -n 1 echo)"
|
||||
;;
|
||||
*) ;;
|
||||
|
||||
esac
|
||||
done <<< "$(kdump_read_conf)"
|
||||
|
||||
handle_default_dump_target
|
||||
|
||||
if ! have_compression_in_dracut_args; then
|
||||
# Here zstd is set as the default compression method. If squash module
|
||||
# is available for dracut, libzstd will be used by mksquashfs. If
|
||||
# squash module is unavailable, command zstd will be used instead.
|
||||
if is_squash_available || is_zstd_command_available; then
|
||||
add_dracut_arg "--compress" "zstd"
|
||||
fi
|
||||
fi
|
||||
|
||||
if [[ -n $extra_modules ]]; then
|
||||
add_dracut_arg "--add-drivers" "$extra_modules"
|
||||
fi
|
||||
|
||||
# TODO: The below check is not needed anymore with the introduction of
|
||||
# 'zz-fadumpinit' module, that isolates fadump's capture kernel initrd,
|
||||
# but still sysroot.mount unit gets generated based on 'root=' kernel
|
||||
# parameter available in fadump case. So, find a way to fix that first
|
||||
# before removing this check.
|
||||
if ! is_fadump_capable; then
|
||||
# The 2nd rootfs mount stays behind the normal dump target mount,
|
||||
# so it doesn't affect the logic of check_dump_fs_modified().
|
||||
is_dump_to_rootfs && add_mount "$(to_dev_name "$(get_root_fs_device)")"
|
||||
|
||||
add_dracut_arg "--no-hostonly-default-device"
|
||||
fi
|
||||
|
||||
# This is RHEL-only to work around nvme problem, then real fix should go to dracut
|
||||
if [[ -d /sys/module/nvme ]]; then
|
||||
add_dracut_arg "--add-drivers" "nvme"
|
||||
fi
|
||||
|
||||
dracut "${dracut_args[@]}" "$@"
|
||||
|
||||
_rc=$?
|
||||
sync
|
||||
exit $_rc
|
||||
39
SOURCES/mkdumprd.8
Normal file
39
SOURCES/mkdumprd.8
Normal file
@ -0,0 +1,39 @@
|
||||
.TH MKDUMRD 8 "Fri Feb 9 2007"
|
||||
.SH NAME
|
||||
mkdumprd \- creates initial ramdisk images for kdump crash recovery
|
||||
.SH SYNOPSIS
|
||||
\fBmkdumprd\fR [OPTION]
|
||||
|
||||
.SH DESCRIPTION
|
||||
\fBmkdumprd\fR creates an initial ram file system for use in conjunction with
|
||||
the booting of a kernel within the kdump framework for crash recovery.
|
||||
\fBmkdumprds\fR purpose is to create an initial ram filesystem capable of copying
|
||||
the crashed systems vmcore image to a location specified in \fI/etc/kdump.conf
|
||||
|
||||
\fBmkdumprd\fR interrogates the running system to understand what modules need to
|
||||
be loaded in the initramfs (based on configuration retrieved from
|
||||
\fI/etc/kdump.conf)\fR
|
||||
|
||||
\fBmkdumprd\fR add a new \fBdracut\fR module 99kdumpbase and use \fBdracut\fR
|
||||
utility to generate the initramfs. When generating a kdump initramfs, \fBmkdumprd\fR
|
||||
will determine how much disk space is available, if the dump target's available
|
||||
space is not greater than the total system memory, \fBmkdumprd\fR will print a
|
||||
warning to remind that there might not be enough space to save a vmcore. The
|
||||
warning covers extreme scenarios such as the slab explodes with non-zero data or
|
||||
a full vmcore, etc. Therefore, need to prevent users from having minimum disk
|
||||
space for crash dump.
|
||||
|
||||
\fBmkdumprd\fR was not intended for casual use outside of the service
|
||||
initialization script for the kdump utility, and should not be run manually. If
|
||||
you require a custom kdump initramfs image, it is suggested that you use the
|
||||
kdump service infrastructure to create one, and then manually unpack, modify and
|
||||
repack the image.
|
||||
|
||||
|
||||
.SH OPTIONS
|
||||
.TP
|
||||
All options here are passed to dracut directly, please refer \fBdracut\fR docs
|
||||
for the info.
|
||||
|
||||
.SH "SEE ALSO"
|
||||
.BR dracut (8)
|
||||
74
SOURCES/mkfadumprd
Normal file
74
SOURCES/mkfadumprd
Normal file
@ -0,0 +1,74 @@
|
||||
#!/bin/bash --norc
|
||||
# Generate an initramfs image that isolates dump capture capability within
|
||||
# the default initramfs using zz-fadumpinit dracut module.
|
||||
|
||||
if [[ -f /etc/sysconfig/kdump ]]; then
|
||||
. /etc/sysconfig/kdump
|
||||
fi
|
||||
|
||||
[[ $dracutbasedir ]] || dracutbasedir=/usr/lib/dracut
|
||||
. $dracutbasedir/dracut-functions.sh
|
||||
. /lib/kdump/kdump-lib.sh
|
||||
. /lib/kdump/kdump-logger.sh
|
||||
|
||||
#initiate the kdump logger
|
||||
if ! dlog_init; then
|
||||
echo "mkfadumprd: failed to initiate the kdump logger."
|
||||
exit 1
|
||||
fi
|
||||
|
||||
MKFADUMPRD_TMPDIR="$(mktemp -d -t mkfadumprd.XXXXXX)"
|
||||
[ -d "$MKFADUMPRD_TMPDIR" ] || perror_exit "mkfadumprd: mktemp -d -t mkfadumprd.XXXXXX failed."
|
||||
trap '
|
||||
ret=$?;
|
||||
[[ -d $MKFADUMPRD_TMPDIR ]] && rm --one-file-system -rf -- "$MKFADUMPRD_TMPDIR";
|
||||
exit $ret;
|
||||
' EXIT
|
||||
|
||||
# clean up after ourselves no matter how we die.
|
||||
trap 'exit 1;' SIGINT
|
||||
|
||||
MKDUMPRD="/sbin/mkdumprd -f"
|
||||
# Default boot initramfs to be rebuilt
|
||||
REBUILD_INITRD="$1" && shift
|
||||
TARGET_INITRD="$1" && shift
|
||||
FADUMP_INITRD="$MKFADUMPRD_TMPDIR/fadump.img"
|
||||
|
||||
### First build an initramfs with dump capture capability
|
||||
# this file tells the initrd is fadump enabled
|
||||
touch "$MKFADUMPRD_TMPDIR/fadump.initramfs"
|
||||
ddebug "rebuild fadump initrd: $FADUMP_INITRD $DEFAULT_INITRD $KDUMP_KERNELVER"
|
||||
if ! $MKDUMPRD "$FADUMP_INITRD" -i "$MKFADUMPRD_TMPDIR/fadump.initramfs" /etc/fadump.initramfs; then
|
||||
perror_exit "mkfadumprd: failed to build image with dump capture support"
|
||||
fi
|
||||
|
||||
### Unpack the initramfs having dump capture capability
|
||||
mkdir -p "$MKFADUMPRD_TMPDIR/fadumproot"
|
||||
if ! (pushd "$MKFADUMPRD_TMPDIR/fadumproot" > /dev/null && lsinitrd --unpack "$FADUMP_INITRD" &&
|
||||
popd > /dev/null); then
|
||||
derror "mkfadumprd: failed to unpack '$MKFADUMPRD_TMPDIR'"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
### Pack it into the normal boot initramfs with zz-fadumpinit module
|
||||
_dracut_isolate_args=(
|
||||
--rebuild "$REBUILD_INITRD" --add zz-fadumpinit
|
||||
-i "$MKFADUMPRD_TMPDIR/fadumproot" /fadumproot
|
||||
-i "$MKFADUMPRD_TMPDIR/fadumproot/usr/lib/dracut/hostonly-kernel-modules.txt"
|
||||
/usr/lib/dracut/fadump-kernel-modules.txt
|
||||
)
|
||||
|
||||
if is_squash_available; then
|
||||
_dracut_isolate_args+=(--add squash)
|
||||
fi
|
||||
|
||||
# Same as setting zstd in mkdumprd
|
||||
if ! have_compression_in_dracut_args; then
|
||||
if is_squash_available || is_zstd_command_available; then
|
||||
_dracut_isolate_args+=(--compress zstd)
|
||||
fi
|
||||
fi
|
||||
|
||||
if ! dracut --force --quiet "${_dracut_isolate_args[@]}" "$@" "$TARGET_INITRD"; then
|
||||
perror_exit "mkfadumprd: failed to setup '$TARGET_INITRD' with dump capture capability"
|
||||
fi
|
||||
119
SOURCES/supported-kdump-targets.txt
Normal file
119
SOURCES/supported-kdump-targets.txt
Normal file
@ -0,0 +1,119 @@
|
||||
Supported Kdump Targets
|
||||
|
||||
This document try to list all supported kdump targets, and those supported
|
||||
or unknown/tech-preview targets, this can help users to decide whether a dump
|
||||
solution is available.
|
||||
|
||||
Dump Target support status
|
||||
==========================
|
||||
This section tries to come up with some kind of guidelines in terms of
|
||||
what dump targets are supported/not supported. Whatever is listed here
|
||||
is not binding in any manner. It is just sharing of current understanding
|
||||
and if something is not right, this section needs to be edited.
|
||||
|
||||
Following are 3 lists. First one contains supported targets. These are
|
||||
generic configurations which should work and some configuration most
|
||||
likely has worked in testing. Second list is known unsupported targets.
|
||||
These targets we know either don't work or we don't support. And third
|
||||
list is unknown/tech-preview. We either don't yet know the status of kdump
|
||||
on these targets or these are under tech-preview.
|
||||
|
||||
Note, these lists are not set in stone and can be changed at any point of
|
||||
time. Also these lists might not be complete. We will add/remove items to
|
||||
it as we get more testing information. Also, there are many corner cases
|
||||
which can't possibly be listed. For example in general we might be
|
||||
supporting software iscsi but there might be some configurations of it
|
||||
which don't work.
|
||||
|
||||
So if any target is listed in supported section, it does not mean it works
|
||||
in all possible configurations. It just means that in common configurations
|
||||
it should work but there can be issues with particular configurations which
|
||||
are not supported. As we come to know of particular issues, we will keep on
|
||||
updating lists accordingly.
|
||||
|
||||
|
||||
Supported Dump targets
|
||||
----------------------
|
||||
storage:
|
||||
LVM volume (no thinp)
|
||||
FC disks (qla2xxx, lpfc, bnx2fc, bfa)
|
||||
software initiator based iSCSI
|
||||
software RAID (mdraid)
|
||||
hardware RAID (smartpqi, hpsa, megaraid, mpt3sas, aacraid, mpi3mr)
|
||||
SCSI/SATA disks
|
||||
iSCSI HBA (all offload)
|
||||
hardware FCoE (qla2xxx, lpfc)
|
||||
software FCoE (bnx2fc) (Extra configuration required,
|
||||
please read "Note on FCoE" section below)
|
||||
|
||||
network:
|
||||
Hardware using kernel modules: (igb, ixgbe, ice, i40e, e1000e, igc,
|
||||
tg3, bnx2x, bnxt_en, qede, cxgb4, be2net, enic, sfc, mlx4_en,
|
||||
mlx5_core, r8169, atlantic, nfp, ionic; nicvf (aarch64 only))
|
||||
protocol: ipv4
|
||||
bonding
|
||||
vlan
|
||||
bridge
|
||||
vlan tagged bonding
|
||||
bridge over bond/vlan
|
||||
|
||||
hypervisor:
|
||||
kvm
|
||||
xen (Supported in select configurations only)
|
||||
|
||||
filesystem:
|
||||
ext[234]
|
||||
xfs
|
||||
nfs
|
||||
|
||||
firmware:
|
||||
BIOS
|
||||
UEFI
|
||||
|
||||
hypervisor:
|
||||
VMWare ESXi 4.x 5.x would not be tested/supported any more.
|
||||
only support ESXi 6.6, 6.7, 7.0
|
||||
Hyper-V 2012 R2 (RHEL Gen1 UP Guest only), later version will
|
||||
also be tested/supported
|
||||
|
||||
Unsupported Dump targets
|
||||
------------------------
|
||||
storage:
|
||||
BIOS RAID
|
||||
Thin provisioning volume
|
||||
Software iSCSI with iBFT (bnx2i, cxgb3i, cxgb4i)
|
||||
Software iSCSI with hybrid (be2iscsi)
|
||||
FCoE
|
||||
legacy IDE
|
||||
glusterfs
|
||||
gfs2/clvm/halvm
|
||||
|
||||
network:
|
||||
hardware using kernel modules: (sfc SRIOV, cxgb4vf, pch_gbe)
|
||||
protocol: ipv6
|
||||
wireless
|
||||
Infiniband (IB)
|
||||
vlan over bridge/team
|
||||
|
||||
filesystem:
|
||||
btrfs
|
||||
|
||||
Unknown/tech-preview
|
||||
--------------------
|
||||
storage:
|
||||
PCI Express based SSDs
|
||||
|
||||
hypervisor:
|
||||
Hyper-V 2008
|
||||
Hyper-V 2012
|
||||
|
||||
|
||||
Note on FCoE
|
||||
=====================
|
||||
If you are trying to dump to a software FCoE target, you may encounter OOM
|
||||
issue, because some software FCoE requires more memory to work. In such case,
|
||||
you may need to increase the kdump reserved memory size in "crashkernel="
|
||||
kernel parameter.
|
||||
|
||||
For hardware FCoE, kdump should work naturally as firmware will do the
|
||||
initialization job. The capture kernel and kdump tools will run just fine.
|
||||
2402
SPECS/kexec-tools.spec
Normal file
2402
SPECS/kexec-tools.spec
Normal file
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue
Block a user