| Current Path : /lib/kdump/ |
Linux gator3171.hostgator.com 4.19.286-203.ELK.el7.x86_64 #1 SMP Wed Jun 14 04:33:55 CDT 2023 x86_64 |
| Current File : //lib/kdump/kdump-lib-initramfs.sh |
# These variables and functions are useful in 2nd kernel
. /lib/kdump-lib.sh
KDUMP_PATH="/var/crash"
CORE_COLLECTOR=""
DEFAULT_CORE_COLLECTOR="makedumpfile -l --message-level 1 -d 31"
DMESG_COLLECTOR="/sbin/vmcore-dmesg"
DEFAULT_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"
KDUMP_SCRIPT_DIR="/kdumpscripts"
DD_BLKSIZE=512
FINAL_ACTION="systemctl reboot -f"
KDUMP_CONF="/etc/kdump.conf"
KDUMP_PRE=""
KDUMP_POST=""
NEWROOT="/sysroot"
get_kdump_confs()
{
local config_opt config_val
while read 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"
;;
default)
case $config_val in
shell)
DEFAULT_ACTION="kdump_emergency_shell"
;;
reboot)
DEFAULT_ACTION="systemctl reboot -f"
;;
halt)
DEFAULT_ACTION="halt"
;;
poweroff)
DEFAULT_ACTION="poweroff"
;;
dump_to_rootfs)
DEFAULT_ACTION="dump_to_rootfs"
;;
esac
;;
esac
done <<< "$(read_strip_comments $KDUMP_CONF)"
if [ -z "$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
}
# dump_fs <mount point| device>
dump_fs()
{
local _dev=$(findmnt -k -f -n -r -o SOURCE $1)
local _mp=$(findmnt -k -f -n -r -o TARGET $1)
echo "kdump: dump target is $_dev"
if [ -z "$_mp" ]; then
echo "kdump: error: Dump target $_dev is not mounted."
return 1
fi
# Remove -F in makedumpfile case. We don't want a flat format dump here.
[[ $CORE_COLLECTOR = *makedumpfile* ]] && CORE_COLLECTOR=`echo $CORE_COLLECTOR | sed -e "s/-F//g"`
echo "kdump: saving to $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/"
mount -o remount,rw $_mp || return 1
mkdir -p $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR || return 1
save_vmcore_dmesg_fs ${DMESG_COLLECTOR} "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/"
echo "kdump: saving vmcore"
$CORE_COLLECTOR /proc/vmcore $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete || return 1
mv $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore
sync
echo "kdump: saving vmcore complete"
# improper kernel cmdline can cause the failure of echo, we can ignore this kind of failure
return 0
}
save_vmcore_dmesg_fs() {
local _dmesg_collector=$1
local _path=$2
echo "kdump: saving vmcore-dmesg.txt"
$_dmesg_collector /proc/vmcore > ${_path}/vmcore-dmesg-incomplete.txt
_exitcode=$?
if [ $_exitcode -eq 0 ]; then
mv ${_path}/vmcore-dmesg-incomplete.txt ${_path}/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
echo "kdump: saving vmcore-dmesg.txt complete"
else
echo "kdump: saving vmcore-dmesg.txt failed"
fi
}
dump_to_rootfs()
{
echo "Kdump: trying to bring up rootfs device"
systemctl start dracut-initqueue
echo "Kdump: waiting for rootfs mount, will timeout after 90 seconds"
systemctl start sysroot.mount
dump_fs $NEWROOT
}
kdump_emergency_shell()
{
echo "PS1=\"kdump:\\\${PWD}# \"" >/etc/profile
/bin/dracut-emergency
rm -f /etc/profile
}
do_default_action()
{
echo "Kdump: Executing default action $DEFAULT_ACTION"
eval $DEFAULT_ACTION
}
do_final_action()
{
eval $FINAL_ACTION
}