kexec-tools/dracut-module-setup.sh
Kairui Song 06aa5b897f Remove the kdump error handler isolation wrapper
Resolves: bz1901024
Upstream: Fedora
Conflict: None

commit a2306346bc
Author: Kairui Song <kasong@redhat.com>
Date:   Mon Apr 26 17:09:56 2021 +0800

    Remove the kdump error handler isolation wrapper

    The wrapper is introduced in commit 002337c, according to the commit
    message, the only usage of the wrapper is when dracut-initqueue calls
    "systemctl start emergency" directly. In that case, emergency
    is started, but not in a isolation mode, which means dracut-initqueue
    is still running. On the other hand, emergency will call
    "systemctl start dracut-initqueue" again when default action is dump_to_rootfs.

    systemd would block on the last dracut-initqueue, waiting for the first
    instance to exit, which leaves us hang.

    In previous commit we added initqueue status detect in dump_to_rootfs,
    so now even without the wrapper, it will not hang.

    And actually, previously, with the wrapper, emergency might still hang
    for like 30s. When dracut called emergency service because initqueue
    timed out, dump_to_rootfs will try start initqueue again and timeout
    again. Now with the wrapper removed, we can avoid these two kinds of
    hangs, bacause without the isolation we can detect initqueue service
    status correctly in such case.

    Also remove the invalid header comments in service file, the service
    is not part of systemd code. And sync the service spec with dracut.

    Signed-off-by: Kairui Song <kasong@redhat.com>
    Acked-by: Coiby Xu <coxu@redhat.com>

Signed-off-by: Kairui Song <kasong@redhat.com>
2021-06-04 14:29:28 +08:00

1058 lines
33 KiB
Bash
Executable File

#!/bin/bash
kdump_module_init() {
if ! [[ -d "${initdir}/tmp" ]]; then
mkdir -p "${initdir}/tmp"
fi
. /lib/kdump/kdump-lib.sh
}
check() {
[[ $debug ]] && set -x
#kdumpctl sets this explicitly
if [ -z "$IN_KDUMP" ] || [ ! -f /etc/kdump.conf ]
then
return 1
fi
return 0
}
depends() {
local _dep="base shutdown"
kdump_module_init
add_opt_module() {
[[ " $omit_dracutmodules " != *\ $1\ * ]] && _dep="$_dep $1"
}
is_squash_available() {
for kmodule in squashfs overlay loop; do
if [ -z "$KDUMP_KERNELVER" ]; then
modprobe --dry-run $kmodule &>/dev/null || return 1
else
modprobe -S $KDUMP_KERNELVER --dry-run $kmodule &>/dev/null || return 1
fi
done
}
if is_squash_available && ! is_fadump_capable; then
add_opt_module squash
else
dwarning "Required modules to build a squashed kdump image is missing!"
fi
if is_wdt_active; then
add_opt_module watchdog
fi
if is_ssh_dump_target; then
_dep="$_dep ssh-client"
fi
if [ "$(uname -m)" = "s390x" ]; then
_dep="$_dep znet"
fi
if [ -n "$( find /sys/devices -name drm )" ] || [ -d /sys/module/hyperv_fb ]; then
add_opt_module drm
fi
if is_generic_fence_kdump || is_pcs_fence_kdump; then
_dep="$_dep network"
fi
echo $_dep
}
kdump_is_bridge() {
[ -d /sys/class/net/"$1"/bridge ]
}
kdump_is_bond() {
[ -d /sys/class/net/"$1"/bonding ]
}
kdump_is_team() {
[ -f /usr/bin/teamnl ] && teamnl $1 ports &> /dev/null
}
kdump_is_vlan() {
[ -f /proc/net/vlan/"$1" ]
}
# $1: netdev name
source_ifcfg_file() {
local ifcfg_file
dwarning "Network Scripts are deprecated. You are encouraged to set up network by NetworkManager."
ifcfg_file=$(get_ifcfg_filename $1)
if [ -f "${ifcfg_file}" ]; then
. ${ifcfg_file}
else
dwarning "The ifcfg file of $1 is not found!"
fi
}
# $1: nmcli connection show output
kdump_setup_dns() {
local _netdev="$1"
local _nm_show_cmd="$2"
local _nameserver _dns _tmp array
local _dnsfile=${initdir}/etc/cmdline.d/42dns.conf
_tmp=$(get_nmcli_value_by_field "$_nm_show_cmd" "IP4.DNS")
array=(${_tmp//|/ })
if [[ ${array[@]} ]]; then
for _dns in "${array[@]}"
do
echo "nameserver=$_dns" >> "$_dnsfile"
done
else
dwarning "Failed to get DNS info via nmcli output. Now try sourcing ifcfg script"
source_ifcfg_file "$_netdev"
[ -n "$DNS1" ] && echo "nameserver=$DNS1" > "$_dnsfile"
[ -n "$DNS2" ] && echo "nameserver=$DNS2" >> "$_dnsfile"
fi
while read content;
do
_nameserver=$(echo $content | grep ^nameserver)
[ -z "$_nameserver" ] && continue
_dns=$(echo $_nameserver | cut -d' ' -f2)
[ -z "$_dns" ] && continue
if [ ! -f $_dnsfile ] || [ ! $(cat $_dnsfile | grep -q $_dns) ]; then
echo "nameserver=$_dns" >> "$_dnsfile"
fi
done < "/etc/resolv.conf"
}
# $1: repeat times
# $2: string to be repeated
# $3: separator
repeatedly_join_str() {
local _count="$1"
local _str="$2"
local _separator="$3"
local i _res
if [[ "$_count" -le 0 ]]; then
echo -n ""
return
fi
i=0
_res="$_str"
((_count--))
while [[ "$i" -lt "$_count" ]]; do
((i++))
_res="${_res}${_separator}${_str}"
done
echo -n "$_res"
}
# $1: prefix
# $2: ipv6_flag="-6" indicates it's IPv6
# Given a prefix, calculate the netmask (equivalent of "ipcalc -m")
# by concatenating three parts,
# 1) the groups with all bits set 1
# 2) a group with partial bits set to 0
# 3) the groups with all bits set to 0
cal_netmask_by_prefix() {
local _prefix="$1"
local _ipv6_flag="$2" _ipv6
local _bits_per_octet=8
local _count _res _octets_per_group _octets_total _seperator _total_groups
local _max_group_value _max_group_value_repr _bits_per_group _tmp _zero_bits
if [[ "$_ipv6_flag" == "-6" ]]; then
_ipv6=1
else
_ipv6=0
fi
if [[ "$_prefix" -lt 0 || "$_prefix" -gt 128 ]] || \
( ((!_ipv6)) && [[ "$_prefix" -gt 32 ]] ); then
derror "Bad prefix:$_prefix for calculating netmask"
exit 1
fi
if ((_ipv6)); then
_octets_per_group=2
_octets_total=16
_seperator=":"
else
_octets_per_group=1
_octets_total=4
_seperator="."
fi
_total_groups=$((_octets_total/_octets_per_group))
_bits_per_group=$((_octets_per_group * _bits_per_octet))
_max_group_value=$(((1 << _bits_per_group) - 1))
if ((_ipv6)); then
_max_group_value_repr=$(printf "%x" $_max_group_value)
else
_max_group_value_repr="$_max_group_value"
fi
_count=$((_prefix/_octets_per_group/_bits_per_octet))
_first_part=$(repeatedly_join_str "$_count" "$_max_group_value_repr" "$_seperator")
_res="$_first_part"
_tmp=$((_octets_total*_bits_per_octet-_prefix))
_zero_bits=$(expr $_tmp % $_bits_per_group)
if [[ "$_zero_bits" -ne 0 ]]; then
_second_part=$((_max_group_value >> _zero_bits << _zero_bits))
if ((_ipv6)); then
_second_part=$(printf "%x" $_second_part)
fi
((_count++))
if [[ -z "$_first_part" ]]; then
_res="$_second_part"
else
_res="${_first_part}${_seperator}${_second_part}"
fi
fi
_count=$((_total_groups-_count))
if [[ "$_count" -eq 0 ]]; then
echo -n "$_res"
return
fi
if ((_ipv6)) && [[ "$_count" -gt 1 ]] ; then
# use condensed notion for IPv6
_third_part=":"
else
_third_part=$(repeatedly_join_str "$_count" "0" "$_seperator")
fi
if [[ -z "$_res" ]] && ((!_ipv6)) ; then
echo -n "${_third_part}"
else
echo -n "${_res}${_seperator}${_third_part}"
fi
}
#$1: netdev name
#$2: srcaddr
#if it use static ip echo it, or echo null
kdump_static_ip() {
local _netdev="$1" _srcaddr="$2" kdumpnic="$3" _ipv6_flag
local _netmask _gateway _ipaddr _target _nexthop _prefix
_ipaddr=$(ip addr show dev $_netdev permanent | awk "/ $_srcaddr\/.* /{print \$2}")
if is_ipv6_address $_srcaddr; then
_ipv6_flag="-6"
fi
if [ -n "$_ipaddr" ]; then
_gateway=$(ip $_ipv6_flag route list dev $_netdev | \
awk '/^default /{print $3}' | head -n 1)
if [ "x" != "x"$_ipv6_flag ]; then
# _ipaddr="2002::56ff:feb6:56d5/64", _netmask is the number after "/"
_netmask=${_ipaddr#*\/}
_srcaddr="[$_srcaddr]"
_gateway="[$_gateway]"
else
_prefix=$(cut -d'/' -f2 <<< "$_ipaddr")
_netmask=$(cal_netmask_by_prefix "$_prefix" "$_ipv6_flag")
if [[ "$?" -ne 0 ]]; then
derror "Failed to calculate netmask for $_ipaddr"
exit 1
fi
fi
echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
fi
/sbin/ip $_ipv6_flag route show | grep -v default |\
grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" |\
while read _route; do
_target=`echo $_route | cut -d ' ' -f1`
_nexthop=`echo $_route | cut -d ' ' -f3`
if [ "x" != "x"$_ipv6_flag ]; then
_target="[$_target]"
_nexthop="[$_nexthop]"
fi
echo "rd.route=$_target:$_nexthop:$kdumpnic"
done >> ${initdir}/etc/cmdline.d/45route-static.conf
kdump_handle_mulitpath_route $_netdev $_srcaddr $kdumpnic
}
kdump_handle_mulitpath_route() {
local _netdev="$1" _srcaddr="$2" kdumpnic="$3" _ipv6_flag
local _target _nexthop _route _weight _max_weight _rule
if is_ipv6_address $_srcaddr; then
_ipv6_flag="-6"
fi
while IFS="" read _route; do
if [[ "$_route" =~ [[:space:]]+nexthop ]]; then
_route=$(echo "$_route" | sed -e 's/^[[:space:]]*//')
# Parse multipath route, using previous _target
[[ "$_target" == 'default' ]] && continue
[[ "$_route" =~ .*via.*\ $_netdev ]] || continue
_weight=`echo "$_route" | cut -d ' ' -f7`
if [[ "$_weight" -gt "$_max_weight" ]]; then
_nexthop=`echo "$_route" | cut -d ' ' -f3`
_max_weight=$_weight
if [ "x" != "x"$_ipv6_flag ]; then
_rule="rd.route=[$_target]:[$_nexthop]:$kdumpnic"
else
_rule="rd.route=$_target:$_nexthop:$kdumpnic"
fi
fi
else
[[ -n "$_rule" ]] && echo "$_rule"
_target=`echo "$_route" | cut -d ' ' -f1`
_rule="" _max_weight=0 _weight=0
fi
done >> ${initdir}/etc/cmdline.d/45route-static.conf\
<<< "$(/sbin/ip $_ipv6_flag route show)"
[[ -n $_rule ]] && echo $_rule >> ${initdir}/etc/cmdline.d/45route-static.conf
}
kdump_get_mac_addr() {
cat /sys/class/net/$1/address
}
#Bonding or team master modifies the mac address
#of its slaves, we should use perm address
kdump_get_perm_addr() {
local addr=$(ethtool -P $1 | sed -e 's/Permanent address: //')
if [ -z "$addr" ] || [ "$addr" = "00:00:00:00:00:00" ]
then
derror "Can't get the permanent address of $1"
else
echo "$addr"
fi
}
# Prefix kernel assigned names with "kdump-". EX: eth0 -> kdump-eth0
# Because kernel assigned names are not persistent between 1st and 2nd
# kernel. We could probably end up with eth0 being eth1, eth0 being
# eth1, and naming conflict happens.
kdump_setup_ifname() {
local _ifname
# If ifname already has 'kdump-' prefix, we must be switching from
# fadump to kdump. Skip prefixing 'kdump-' in this case as adding
# another prefix may truncate the ifname. Since an ifname with
# 'kdump-' is already persistent, this should be fine.
if [[ $1 =~ eth* ]] && [[ ! $1 =~ ^kdump-* ]]; then
_ifname="kdump-$1"
else
_ifname="$1"
fi
echo "$_ifname"
}
kdump_setup_bridge() {
local _netdev=$1
local _brif _dev _mac _kdumpdev
for _dev in `ls /sys/class/net/$_netdev/brif/`; do
_kdumpdev=$_dev
if kdump_is_bond "$_dev"; then
$(kdump_setup_bond "$_dev" "$(get_nmcli_connection_show_cmd_by_ifname "$_dev")")
if [[ $? != 0 ]]; then
exit 1
fi
elif kdump_is_team "$_dev"; then
kdump_setup_team "$_dev"
elif kdump_is_vlan "$_dev"; then
kdump_setup_vlan "$_dev"
else
_mac=$(kdump_get_mac_addr $_dev)
_kdumpdev=$(kdump_setup_ifname $_dev)
echo -n " ifname=$_kdumpdev:$_mac" >> ${initdir}/etc/cmdline.d/41bridge.conf
fi
_brif+="$_kdumpdev,"
done
echo " bridge=$_netdev:$(echo $_brif | sed -e 's/,$//')" >> ${initdir}/etc/cmdline.d/41bridge.conf
}
# drauct takes bond=<bondname>[:<bondslaves>:[:<options>]] syntax to parse
# bond. For example:
# bond=bond0:eth0,eth1:mode=balance-rr
kdump_setup_bond() {
local _netdev="$1"
local _nm_show_cmd="$2"
local _dev _mac _slaves _kdumpdev _bondoptions
for _dev in `cat /sys/class/net/$_netdev/bonding/slaves`; do
_mac=$(kdump_get_perm_addr $_dev)
_kdumpdev=$(kdump_setup_ifname $_dev)
echo -n " ifname=$_kdumpdev:$_mac" >> ${initdir}/etc/cmdline.d/42bond.conf
_slaves+="$_kdumpdev,"
done
echo -n " bond=$_netdev:$(echo $_slaves | sed 's/,$//')" >> ${initdir}/etc/cmdline.d/42bond.conf
_bondoptions=$(get_nmcli_value_by_field "$_nm_show_cmd" "bond.options")
if [[ -z "_bondoptions" ]]; then
dwarning "Failed to get bond configuration via nmlci output. Now try sourcing ifcfg script."
source_ifcfg_file $_netdev
_bondoptions="$(echo $BONDING_OPTS | xargs echo | tr " " ",")"
fi
if [[ -z "_bondoptions" ]]; then
derror "Get empty bond options"
exit 1
fi
echo ":$_bondoptions" >> ${initdir}/etc/cmdline.d/42bond.conf
}
kdump_setup_team() {
local _netdev=$1
local _dev _mac _slaves _kdumpdev
for _dev in `teamnl $_netdev ports | awk -F':' '{print $2}'`; do
_mac=$(kdump_get_perm_addr $_dev)
_kdumpdev=$(kdump_setup_ifname $_dev)
echo -n " ifname=$_kdumpdev:$_mac" >> ${initdir}/etc/cmdline.d/44team.conf
_slaves+="$_kdumpdev,"
done
echo " team=$_netdev:$(echo $_slaves | sed -e 's/,$//')" >> ${initdir}/etc/cmdline.d/44team.conf
#Buggy version teamdctl outputs to stderr!
#Try to use the latest version of teamd.
teamdctl "$_netdev" config dump > ${initdir}/tmp/$$-$_netdev.conf
if [ $? -ne 0 ]
then
derror "teamdctl failed."
exit 1
fi
inst_dir /etc/teamd
inst_simple ${initdir}/tmp/$$-$_netdev.conf "/etc/teamd/$_netdev.conf"
rm -f ${initdir}/tmp/$$-$_netdev.conf
}
kdump_setup_vlan() {
local _netdev=$1
local _phydev="$(awk '/^Device:/{print $2}' /proc/net/vlan/"$_netdev")"
local _netmac="$(kdump_get_mac_addr $_phydev)"
local _kdumpdev
#Just support vlan over bond and team
if kdump_is_bridge "$_phydev"; then
derror "Vlan over bridge is not supported!"
exit 1
elif kdump_is_bond "$_phydev"; then
$(kdump_setup_bond "$_phydev" "$(get_nmcli_connection_show_cmd_by_ifname "$_phydev")")
if [[ $? != 0 ]]; then
exit 1
fi
echo " vlan=$(kdump_setup_ifname $_netdev):$_phydev" > ${initdir}/etc/cmdline.d/43vlan.conf
else
_kdumpdev="$(kdump_setup_ifname $_phydev)"
echo " vlan=$(kdump_setup_ifname $_netdev):$_kdumpdev ifname=$_kdumpdev:$_netmac" > ${initdir}/etc/cmdline.d/43vlan.conf
fi
}
# setup s390 znet cmdline
# $1: netdev (ifname)
# $2: nmcli connection show output
kdump_setup_znet() {
local _netdev="$1"
local _nmcli_cmd="$2"
local s390_prefix="802-3-ethernet.s390-"
local _options=""
local NETTYPE
local SUBCHANNELS
NETTYPE=$(get_nmcli_value_by_field "$_nmcli_cmd" "${s390_prefix}nettype")
SUBCHANNELS=$(get_nmcli_value_by_field "$_nmcli_cmd" "${s390_prefix}subchannels")
_options=$(get_nmcli_value_by_field "$_nmcli_cmd" "${s390_prefix}options")
if [[ -z "$NETTYPE" || -z "$SUBCHANNELS" || -z "$_options" ]]; then
dwarning "Failed to get znet configuration via nmlci output. Now try sourcing ifcfg script."
source_ifcfg_file $_netdev
for i in $OPTIONS; do
_options=${_options},$i
done
fi
if [[ -z "$NETTYPE" || -z "$SUBCHANNELS" || -z "$_options" ]]; then
exit 1
fi
echo rd.znet=${NETTYPE},${SUBCHANNELS},${_options} rd.znet_ifname=$_netdev:${SUBCHANNELS} > ${initdir}/etc/cmdline.d/30znet.conf
}
kdump_get_ip_route()
{
local _route=$(/sbin/ip -o route get to $1 2>&1)
[ $? != 0 ] && die "Bad kdump network destination: $1"
echo $_route
}
kdump_get_ip_route_field()
{
if `echo $1 | grep -q $2`; then
echo ${1##*$2} | cut -d ' ' -f1
fi
}
kdump_get_remote_ip()
{
local _remote=$(get_remote_host $1) _remote_temp
if is_hostname $_remote; then
_remote_temp=`getent ahosts $_remote | grep -v : | head -n 1`
if [ -z "$_remote_temp" ]; then
_remote_temp=`getent ahosts $_remote | head -n 1`
fi
_remote=`echo $_remote_temp | cut -d' ' -f1`
fi
echo $_remote
}
# Setup dracut to bring up network interface that enable
# initramfs accessing giving destination
# $1: destination host
kdump_install_net() {
local _destaddr _srcaddr _route _netdev _nm_show_cmd kdumpnic
local _static _proto _ip_conf _ip_opts _ifname_opts
_destaddr=$(kdump_get_remote_ip $1)
_route=$(kdump_get_ip_route $_destaddr)
_srcaddr=$(kdump_get_ip_route_field "$_route" "src")
_netdev=$(kdump_get_ip_route_field "$_route" "dev")
_nm_show_cmd=$(get_nmcli_connection_show_cmd_by_ifname "$_netdev")
_netmac=$(kdump_get_mac_addr $_netdev)
kdumpnic=$(kdump_setup_ifname $_netdev)
if [ "$(uname -m)" = "s390x" ]; then
$(kdump_setup_znet "$_netdev" "$_nm_show_cmd")
if [[ $? != 0 ]]; then
derror "Failed to set up znet"
exit 1
fi
fi
_static=$(kdump_static_ip $_netdev $_srcaddr $kdumpnic)
if [ -n "$_static" ]; then
_proto=none
elif is_ipv6_address $_srcaddr; then
_proto=auto6
else
_proto=dhcp
fi
_ip_conf="${initdir}/etc/cmdline.d/40ip.conf"
_ip_opts=" ip=${_static}$kdumpnic:${_proto}"
# dracut doesn't allow duplicated configuration for same NIC, even they're exactly the same.
# so we have to avoid adding duplicates
# We should also check /proc/cmdline for existing ip=xx arg.
# For example, iscsi boot will specify ip=xxx arg in cmdline.
if [ ! -f $_ip_conf ] || ! grep -q $_ip_opts $_ip_conf &&\
! grep -q "ip=[^[:space:]]*$_netdev" /proc/cmdline; then
echo "$_ip_opts" >> $_ip_conf
fi
if kdump_is_bridge "$_netdev"; then
kdump_setup_bridge "$_netdev"
elif kdump_is_bond "$_netdev"; then
$(kdump_setup_bond "$_netdev" "$_nm_show_cmd")
if [[ $? != 0 ]]; then
exit 1
fi
elif kdump_is_team "$_netdev"; then
kdump_setup_team "$_netdev"
elif kdump_is_vlan "$_netdev"; then
kdump_setup_vlan "$_netdev"
else
_ifname_opts=" ifname=$kdumpnic:$_netmac"
echo "$_ifname_opts" >> $_ip_conf
fi
kdump_setup_dns "$_netdev" "$_nm_show_cmd"
if [ ! -f ${initdir}/etc/cmdline.d/50neednet.conf ]; then
# network-manager module needs this parameter
echo "rd.neednet" >> ${initdir}/etc/cmdline.d/50neednet.conf
fi
# Save netdev used for kdump as cmdline
# Whoever calling kdump_install_net() is setting up the default gateway,
# ie. bootdev/kdumpnic. So don't override the setting if calling
# kdump_install_net() for another time. For example, after setting eth0 as
# the default gate way for network dump, eth1 in the fence kdump path will
# call kdump_install_net again and we don't want eth1 to be the default
# gateway.
if [ ! -f ${initdir}/etc/cmdline.d/60kdumpnic.conf ] &&
[ ! -f ${initdir}/etc/cmdline.d/70bootdev.conf ]; then
echo "kdumpnic=$kdumpnic" > ${initdir}/etc/cmdline.d/60kdumpnic.conf
echo "bootdev=$kdumpnic" > ${initdir}/etc/cmdline.d/70bootdev.conf
fi
}
# install etc/kdump/pre.d and /etc/kdump/post.d
kdump_install_pre_post_conf() {
if [ -d /etc/kdump/pre.d ]; then
for file in /etc/kdump/pre.d/*; do
if [ -x "$file" ]; then
dracut_install $file
elif [ $file != "/etc/kdump/pre.d/*" ]; then
echo "$file is not executable"
fi
done
fi
if [ -d /etc/kdump/post.d ]; then
for file in /etc/kdump/post.d/*; do
if [ -x "$file" ]; then
dracut_install $file
elif [ $file != "/etc/kdump/post.d/*" ]; then
echo "$file is not executable"
fi
done
fi
}
default_dump_target_install_conf()
{
local _target _fstype
local _mntpoint _save_path
is_user_configured_dump_target && return
_save_path=$(get_bind_mount_source $(get_save_path))
_target=$(get_target_from_path $_save_path)
_mntpoint=$(get_mntpoint_from_target $_target)
_fstype=$(get_fs_type_from_target $_target)
if is_fs_type_nfs $_fstype; then
kdump_install_net "$_target"
_fstype="nfs"
else
_target=$(kdump_get_persistent_dev $_target)
fi
echo "$_fstype $_target" >> ${initdir}/tmp/$$-kdump.conf
# don't touch the path under root mount
if [ "$_mntpoint" != "/" ]; then
_save_path=${_save_path##"$_mntpoint"}
fi
#erase the old path line, then insert the parsed path
sed -i "/^path/d" ${initdir}/tmp/$$-kdump.conf
echo "path $_save_path" >> ${initdir}/tmp/$$-kdump.conf
}
#install kdump.conf and what user specifies in kdump.conf
kdump_install_conf() {
local _opt _val _pdev
(read_strip_comments /etc/kdump.conf) > ${initdir}/tmp/$$-kdump.conf
while read _opt _val;
do
# remove inline comments after the end of a directive.
case "$_opt" in
raw)
_pdev=$(persistent_policy="by-id" kdump_get_persistent_dev $_val)
sed -i -e "s#^$_opt[[:space:]]\+$_val#$_opt $_pdev#" ${initdir}/tmp/$$-kdump.conf
;;
ext[234]|xfs|btrfs|minix)
_pdev=$(kdump_get_persistent_dev $_val)
sed -i -e "s#^$_opt[[:space:]]\+$_val#$_opt $_pdev#" ${initdir}/tmp/$$-kdump.conf
;;
ssh|nfs)
kdump_install_net "$_val"
;;
dracut_args)
if [[ $(get_dracut_args_fstype "$_val") = nfs* ]] ; then
kdump_install_net "$(get_dracut_args_target "$_val")"
fi
;;
kdump_pre|kdump_post|extra_bins)
dracut_install $_val
;;
core_collector)
dracut_install "${_val%%[[:blank:]]*}"
;;
esac
done <<< "$(read_strip_comments /etc/kdump.conf)"
kdump_install_pre_post_conf
default_dump_target_install_conf
kdump_configure_fence_kdump "${initdir}/tmp/$$-kdump.conf"
inst "${initdir}/tmp/$$-kdump.conf" "/etc/kdump.conf"
rm -f ${initdir}/tmp/$$-kdump.conf
}
# Default sysctl parameters should suffice for kdump kernel.
# Remove custom configurations sysctl.conf & sysctl.d/*
remove_sysctl_conf() {
# As custom configurations like vm.min_free_kbytes can lead
# to OOM issues in kdump kernel, avoid them
rm -f "${initdir}/etc/sysctl.conf"
rm -rf "${initdir}/etc/sysctl.d"
rm -rf "${initdir}/run/sysctl.d"
rm -rf "${initdir}/usr/lib/sysctl.d"
}
kdump_iscsi_get_rec_val() {
local result
# The open-iscsi 742 release changed to using flat files in
# /var/lib/iscsi.
result=$(/sbin/iscsiadm --show -m session -r ${1} | grep "^${2} = ")
result=${result##* = }
echo $result
}
kdump_get_iscsi_initiator() {
local _initiator
local initiator_conf="/etc/iscsi/initiatorname.iscsi"
[ -f "$initiator_conf" ] || return 1
while read _initiator; do
[ -z "${_initiator%%#*}" ] && continue # Skip comment lines
case $_initiator in
InitiatorName=*)
initiator=${_initiator#InitiatorName=}
echo "rd.iscsi.initiator=${initiator}"
return 0;;
*) ;;
esac
done < ${initiator_conf}
return 1
}
# Figure out iBFT session according to session type
is_ibft() {
[ "$(kdump_iscsi_get_rec_val $1 "node.discovery_type")" = fw ]
}
kdump_setup_iscsi_device() {
local path=$1
local tgt_name; local tgt_ipaddr;
local username; local password; local userpwd_str;
local username_in; local password_in; local userpwd_in_str;
local netroot_str ; local initiator_str;
local netroot_conf="${initdir}/etc/cmdline.d/50iscsi.conf"
local initiator_conf="/etc/iscsi/initiatorname.iscsi"
dinfo "Found iscsi component $1"
# Check once before getting explicit values, so we can bail out early,
# e.g. in case of pure-hardware(all-offload) iscsi.
if ! /sbin/iscsiadm -m session -r ${path} &>/dev/null ; then
return 1
fi
if is_ibft ${path}; then
return
fi
# Remove software iscsi cmdline generated by 95iscsi,
# and let kdump regenerate here.
rm -f ${initdir}/etc/cmdline.d/95iscsi.conf
tgt_name=$(kdump_iscsi_get_rec_val ${path} "node.name")
tgt_ipaddr=$(kdump_iscsi_get_rec_val ${path} "node.conn\[0\].address")
# get and set username and password details
username=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.username")
[ "$username" == "<empty>" ] && username=""
password=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.password")
[ "$password" == "<empty>" ] && password=""
username_in=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.username_in")
[ -n "$username" ] && userpwd_str="$username:$password"
# get and set incoming username and password details
[ "$username_in" == "<empty>" ] && username_in=""
password_in=$(kdump_iscsi_get_rec_val ${path} "node.session.auth.password_in")
[ "$password_in" == "<empty>" ] && password_in=""
[ -n "$username_in" ] && userpwd_in_str=":$username_in:$password_in"
kdump_install_net "$tgt_ipaddr"
# prepare netroot= command line
# FIXME: Do we need to parse and set other parameters like protocol, port
# iscsi_iface_name, netdev_name, LUN etc.
if is_ipv6_address $tgt_ipaddr; then
tgt_ipaddr="[$tgt_ipaddr]"
fi
netroot_str="netroot=iscsi:${userpwd_str}${userpwd_in_str}@$tgt_ipaddr::::$tgt_name"
[[ -f $netroot_conf ]] || touch $netroot_conf
# If netroot target does not exist already, append.
if ! grep -q $netroot_str $netroot_conf; then
echo $netroot_str >> $netroot_conf
dinfo "Appended $netroot_str to $netroot_conf"
fi
# Setup initator
initiator_str=$(kdump_get_iscsi_initiator)
[ $? -ne "0" ] && derror "Failed to get initiator name" && return 1
# If initiator details do not exist already, append.
if ! grep -q "$initiator_str" $netroot_conf; then
echo "$initiator_str" >> $netroot_conf
dinfo "Appended "$initiator_str" to $netroot_conf"
fi
}
kdump_check_iscsi_targets () {
# If our prerequisites are not met, fail anyways.
type -P iscsistart >/dev/null || return 1
kdump_check_setup_iscsi() (
local _dev
_dev=$1
[[ -L /sys/dev/block/$_dev ]] || return
cd "$(readlink -f /sys/dev/block/$_dev)"
until [[ -d sys || -d iscsi_session ]]; do
cd ..
done
[[ -d iscsi_session ]] && kdump_setup_iscsi_device "$PWD"
)
[[ $hostonly ]] || [[ $mount_needs ]] && {
for_each_host_dev_and_slaves_all kdump_check_setup_iscsi
}
}
# hostname -a is deprecated, do it by ourself
get_alias() {
local ips
local entries
local alias_set
ips=$(hostname -I)
for ip in $ips
do
# in /etc/hosts, alias can come at the 2nd column
entries=$(grep $ip /etc/hosts | awk '{ $1=""; print $0 }')
if [ $? -eq 0 ]; then
alias_set="$alias_set $entries"
fi
done
echo $alias_set
}
is_localhost() {
local hostnames=$(hostname -A)
local shortnames=$(hostname -A -s)
local aliasname=$(get_alias)
local nodename=$1
hostnames="$hostnames $shortnames $aliasname"
for name in ${hostnames}; do
if [ "$name" == "$nodename" ]; then
return 0
fi
done
return 1
}
# retrieves fence_kdump nodes from Pacemaker cluster configuration
get_pcs_fence_kdump_nodes() {
local nodes
pcs cluster sync > /dev/null 2>&1 && pcs cluster cib-upgrade > /dev/null 2>&1
# get cluster nodes from cluster cib, get interface and ip address
nodelist=`pcs cluster cib | xmllint --xpath "/cib/status/node_state/@uname" -`
# nodelist is formed as 'uname="node1" uname="node2" ... uname="nodeX"'
# we need to convert each to node1, node2 ... nodeX in each iteration
for node in ${nodelist}; do
# convert $node from 'uname="nodeX"' to 'nodeX'
eval $node
nodename=$uname
# Skip its own node name
if is_localhost $nodename; then
continue
fi
nodes="$nodes $nodename"
done
echo $nodes
}
# retrieves fence_kdump args from config file
get_pcs_fence_kdump_args() {
if [ -f $FENCE_KDUMP_CONFIG_FILE ]; then
. $FENCE_KDUMP_CONFIG_FILE
echo $FENCE_KDUMP_OPTS
fi
}
get_generic_fence_kdump_nodes() {
local filtered
local nodes
nodes=$(get_option_value "fence_kdump_nodes")
for node in ${nodes}; do
# Skip its own node name
if is_localhost $node; then
continue
fi
filtered="$filtered $node"
done
echo $filtered
}
# setup fence_kdump in cluster
# setup proper network and install needed files
kdump_configure_fence_kdump () {
local kdump_cfg_file=$1
local nodes
local args
if is_generic_fence_kdump; then
nodes=$(get_generic_fence_kdump_nodes)
elif is_pcs_fence_kdump; then
nodes=$(get_pcs_fence_kdump_nodes)
# set appropriate options in kdump.conf
echo "fence_kdump_nodes $nodes" >> ${kdump_cfg_file}
args=$(get_pcs_fence_kdump_args)
if [ -n "$args" ]; then
echo "fence_kdump_args $args" >> ${kdump_cfg_file}
fi
else
# fence_kdump not configured
return 1
fi
# setup network for each node
for node in ${nodes}; do
kdump_install_net $node
done
dracut_install /etc/hosts
dracut_install /etc/nsswitch.conf
dracut_install $FENCE_KDUMP_SEND
}
# Install a random seed used to feed /dev/urandom
# By the time kdump service starts, /dev/uramdom is already fed by systemd
kdump_install_random_seed() {
local poolsize=`cat /proc/sys/kernel/random/poolsize`
if [ ! -d ${initdir}/var/lib/ ]; then
mkdir -p ${initdir}/var/lib/
fi
dd if=/dev/urandom of=${initdir}/var/lib/random-seed \
bs=$poolsize count=1 2> /dev/null
}
kdump_install_systemd_conf() {
local failure_action=$(get_option_value "failure_action")
# Kdump turns out to require longer default systemd mount timeout
# than 1st kernel(90s by default), we use default 300s for kdump.
grep -r "^[[:space:]]*DefaultTimeoutStartSec=" ${initdir}/etc/systemd/system.conf* &>/dev/null
if [ $? -ne 0 ]; then
mkdir -p ${initdir}/etc/systemd/system.conf.d
echo "[Manager]" > ${initdir}/etc/systemd/system.conf.d/kdump.conf
echo "DefaultTimeoutStartSec=300s" >> ${initdir}/etc/systemd/system.conf.d/kdump.conf
fi
# Forward logs to console directly, and don't read Kmsg, this avoids
# unneccessary memory consumption and make console output more useful.
# Only do so for non fadump image.
mkdir -p ${initdir}/etc/systemd/journald.conf.d
echo "[Journal]" > ${initdir}/etc/systemd/journald.conf.d/kdump.conf
echo "Storage=volatile" >> ${initdir}/etc/systemd/journald.conf.d/kdump.conf
echo "ReadKMsg=no" >> ${initdir}/etc/systemd/journald.conf.d/kdump.conf
echo "ForwardToConsole=yes" >> ${initdir}/etc/systemd/journald.conf.d/kdump.conf
}
install() {
kdump_module_init
kdump_install_conf
remove_sysctl_conf
if is_ssh_dump_target; then
kdump_install_random_seed
fi
dracut_install -o /etc/adjtime /etc/localtime
inst "$moddir/monitor_dd_progress" "/kdumpscripts/monitor_dd_progress"
chmod +x ${initdir}/kdumpscripts/monitor_dd_progress
inst "/bin/dd" "/bin/dd"
inst "/bin/tail" "/bin/tail"
inst "/bin/date" "/bin/date"
inst "/bin/sync" "/bin/sync"
inst "/bin/cut" "/bin/cut"
inst "/bin/head" "/bin/head"
inst "/bin/awk" "/bin/awk"
inst "/bin/sed" "/bin/sed"
inst "/sbin/makedumpfile" "/sbin/makedumpfile"
inst "/sbin/vmcore-dmesg" "/sbin/vmcore-dmesg"
inst "/usr/bin/printf" "/sbin/printf"
inst "/usr/bin/logger" "/sbin/logger"
inst "/usr/bin/chmod" "/sbin/chmod"
inst "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
inst "/lib/kdump/kdump-lib-initramfs.sh" "/lib/kdump-lib-initramfs.sh"
inst "/lib/kdump/kdump-logger.sh" "/lib/kdump-logger.sh"
inst "$moddir/kdump.sh" "/usr/bin/kdump.sh"
inst "$moddir/kdump-capture.service" "$systemdsystemunitdir/kdump-capture.service"
systemctl -q --root "$initdir" add-wants initrd.target kdump-capture.service
inst "$moddir/kdump-error-handler.sh" "/usr/bin/kdump-error-handler.sh"
# Replace existing emergency service and emergency target
cp "$moddir/kdump-emergency.service" "$initdir/$systemdsystemunitdir/emergency.service"
cp "$moddir/kdump-emergency.target" "$initdir/$systemdsystemunitdir/emergency.target"
# Also redirect dracut-emergency to kdump error handler
ln_r "$systemdsystemunitdir/emergency.service" "$systemdsystemunitdir/dracut-emergency.service"
# Check for all the devices and if any device is iscsi, bring up iscsi
# target. Ideally all this should be pushed into dracut iscsi module
# at some point of time.
kdump_check_iscsi_targets
kdump_install_systemd_conf
# nfs/ssh dump will need to get host ip in second kernel and need to call 'ip' tool, see get_host_ip for more detail
if is_nfs_dump_target || is_ssh_dump_target; then
inst "ip"
fi
# For the lvm type target under kdump, in /etc/lvm/lvm.conf we can
# safely replace "reserved_memory=XXXX"(default value is 8192) with
# "reserved_memory=1024" to lower memory pressure under kdump. We do
# it unconditionally here, if "/etc/lvm/lvm.conf" doesn't exist, it
# actually does nothing.
sed -i -e \
's/\(^[[:space:]]*reserved_memory[[:space:]]*=\)[[:space:]]*[[:digit:]]*/\1 1024/' \
${initdir}/etc/lvm/lvm.conf &>/dev/null
# Save more memory by dropping switch root capability
if ! is_fadump_capable; then
dracut_no_switch_root
fi
}