2020-12-15 15:59:59 +00:00
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# This file contains a series of commands to perform (in order) in the kdump
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# kernel after a kernel crash in the crash kernel(1st kernel) has happened.
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#
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# Directives in this file are only applicable to the kdump initramfs, and have
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# no effect once the root filesystem is mounted and the normal init scripts are
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# processed.
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#
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# Currently, only one dump target and path can be specified. If the dumping to
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# the configured target fails, the failure action which can be configured via
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# the "failure_action" directive will be performed.
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#
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# Supported options:
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#
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# raw <partition>
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# - Will dd /proc/vmcore into <partition>.
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# Use persistent device names for partition devices,
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# such as /dev/vg/<devname>.
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#
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# nfs <nfs mount>
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# - Will mount nfs to <mnt>, and copy /proc/vmcore to
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# <mnt>/<path>/%HOST-%DATE/, supports DNS.
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#
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# ssh <user@server>
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2021-05-18 06:35:27 +00:00
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# - Will save /proc/vmcore to <user@server>:<path>/%HOST-%DATE/,
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2020-12-15 15:59:59 +00:00
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# supports DNS.
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# NOTE: make sure the user has write permissions on the server.
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#
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# sshkey <path>
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# - Will use the sshkey to do ssh dump.
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# Specify the path of the ssh key to use when dumping
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# via ssh. The default value is /root/.ssh/kdump_id_rsa.
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#
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# <fs type> <partition>
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# - Will mount -t <fs type> <partition> <mnt>, and copy
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# /proc/vmcore to <mnt>/<path>/%DATE/.
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# NOTE: <partition> can be a device node, label or uuid.
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# It's recommended to use persistent device names
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# such as /dev/vg/<devname>.
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# Otherwise it's suggested to use label or uuid.
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#
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# path <path>
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# - "path" represents the file system path in which vmcore
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# will be saved. If a dump target is specified in
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# kdump.conf, then "path" is relative to the specified
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# dump target.
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#
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# Interpretation of "path" changes a bit if the user didn't
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# specify any dump target explicitly in kdump.conf. In this
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# case, "path" represents the absolute path from root. The
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# dump target and adjusted path are arrived at automatically
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# depending on what's mounted in the current system.
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#
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# Ignored for raw device dumps. If unset, will use the default
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# "/var/crash".
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#
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# core_collector <command> <options>
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# - This allows you to specify the command to copy
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# the vmcore. The default is makedumpfile, which on
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# some architectures can drastically reduce vmcore size.
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# See /sbin/makedumpfile --help for a list of options.
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# Note that the -i and -g options are not needed here,
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# as the initrd will automatically be populated with a
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# config file appropriate for the running kernel.
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# The default core_collector for raw/ssh dump is:
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2021-05-18 06:35:27 +00:00
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# "makedumpfile -F -l --message-level 7 -d 31".
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2020-12-15 15:59:59 +00:00
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# The default core_collector for other targets is:
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2021-05-18 06:35:27 +00:00
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# "makedumpfile -l --message-level 7 -d 31".
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2020-12-15 15:59:59 +00:00
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#
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# "makedumpfile -F" will create a flattened vmcore.
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# You need to use "makedumpfile -R" to rearrange the dump data to
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# a normal dumpfile readable with analysis tools. For example:
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# "makedumpfile -R vmcore < vmcore.flat".
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#
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# For core_collector format details, you can refer to
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# kexec-kdump-howto.txt or kdump.conf manpage.
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#
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# kdump_post <binary | script>
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# - This directive allows you to run a executable binary
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# or script after the vmcore dump process terminates.
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# The exit status of the current dump process is fed to
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# the executable binary or script as its first argument.
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# All files under /etc/kdump/post.d are collectively sorted
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# and executed in lexical order, before binary or script
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# specified kdump_post parameter is executed.
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#
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# kdump_pre <binary | script>
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# - Works like the "kdump_post" directive, but instead of running
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# after the dump process, runs immediately before it.
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# Exit status of this binary is interpreted as follows:
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# 0 - continue with dump process as usual
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# non 0 - run the final action (reboot/poweroff/halt)
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# All files under /etc/kdump/pre.d are collectively sorted and
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# executed in lexical order, after binary or script specified
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# kdump_pre parameter is executed.
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# Even if the binary or script in /etc/kdump/pre.d directory
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# returns non 0 exit status, the processing is continued.
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#
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# extra_bins <binaries | shell scripts>
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# - This directive allows you to specify additional binaries or
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# shell scripts to be included in the kdump initrd.
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# Generally they are useful in conjunction with a kdump_post
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# or kdump_pre binary or script which depends on these extra_bins.
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#
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# extra_modules <module(s)>
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# - This directive allows you to specify extra kernel modules
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# that you want to be loaded in the kdump initrd.
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# Multiple modules can be listed, separated by spaces, and any
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# dependent modules will automatically be included.
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#
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# failure_action <reboot | halt | poweroff | shell | dump_to_rootfs>
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# - Action to perform in case dumping fails.
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# reboot: Reboot the system.
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# halt: Halt the system.
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# poweroff: Power down the system.
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# shell: Drop to a bash shell.
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# Exiting the shell reboots the system by default,
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# or perform "final_action".
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# dump_to_rootfs: Dump vmcore to rootfs from initramfs context and
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# reboot by default or perform "final_action".
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# Useful when non-root dump target is specified.
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# The default option is "reboot".
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#
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# default <reboot | halt | poweroff | shell | dump_to_rootfs>
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# - Same as the "failure_action" directive above, but this directive
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# is obsolete and will be removed in the future.
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#
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# final_action <reboot | halt | poweroff>
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# - Action to perform in case dumping succeeds. Also performed
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# when "shell" or "dump_to_rootfs" failure action finishes.
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# Each action is same as the "failure_action" directive above.
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# The default is "reboot".
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#
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# force_rebuild <0 | 1>
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# - By default, kdump initrd will only be rebuilt when necessary.
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# Specify 1 to force rebuilding kdump initrd every time when kdump
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# service starts.
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#
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# force_no_rebuild <0 | 1>
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# - By default, kdump initrd will be rebuilt when necessary.
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# Specify 1 to bypass rebuilding of kdump initrd.
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#
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# force_no_rebuild and force_rebuild options are mutually
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# exclusive and they should not be set to 1 simultaneously.
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#
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# override_resettable <0 | 1>
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# - Usually an unresettable block device can't be a dump target.
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# Specifying 1 when you want to dump even though the block
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# target is unresettable
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# By default, it is 0, which will not try dumping destined to fail.
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#
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# dracut_args <arg(s)>
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# - Pass extra dracut options when rebuilding kdump initrd.
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#
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# fence_kdump_args <arg(s)>
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# - Command line arguments for fence_kdump_send (it can contain
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# all valid arguments except hosts to send notification to).
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#
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# fence_kdump_nodes <node(s)>
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# - List of cluster node(s) except localhost, separated by spaces,
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# to send fence_kdump notifications to.
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# (this option is mandatory to enable fence_kdump).
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#
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#raw /dev/vg/lv_kdump
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#ext4 /dev/vg/lv_kdump
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#ext4 LABEL=/boot
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#ext4 UUID=03138356-5e61-4ab3-b58e-27507ac41937
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#nfs my.server.com:/export/tmp
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2021-05-18 06:35:27 +00:00
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#nfs [2001:db8::1:2:3:4]:/export/tmp
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2020-12-15 15:59:59 +00:00
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#ssh user@my.server.com
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2021-05-18 06:35:27 +00:00
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#ssh user@2001:db8::1:2:3:4
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2020-12-15 15:59:59 +00:00
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#sshkey /root/.ssh/kdump_id_rsa
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path /var/crash
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2021-05-18 06:35:27 +00:00
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core_collector makedumpfile -l --message-level 7 -d 31
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2020-12-15 15:59:59 +00:00
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#core_collector scp
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#kdump_post /var/crash/scripts/kdump-post.sh
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#kdump_pre /var/crash/scripts/kdump-pre.sh
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#extra_bins /usr/bin/lftp
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#extra_modules gfs2
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#failure_action shell
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#force_rebuild 1
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#force_no_rebuild 1
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#dracut_args --omit-drivers "cfg80211 snd" --add-drivers "ext2 ext3"
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#fence_kdump_args -p 7410 -f auto -c 0 -i 10
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#fence_kdump_nodes node1 node2
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