# 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" 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" 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. config_val=$(strip_comments $config_val) case "$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" ;; halt) FAILURE_ACTION="halt" ;; poweroff) FAILURE_ACTION="systemctl poweroff -f" ;; 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 < $KDUMP_CONF if [ -z "$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 dump_fs() { local _dev=$(findmnt -k -f -n -r -o SOURCE $1) local _mp=$(findmnt -k -f -n -r -o TARGET $1) local _op=$(findmnt -k -f -n -r -o OPTIONS $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/" # Only remount to read-write mode if the dump target is mounted read-only. if [[ "$_op" = "ro"* ]]; then echo "kdump: Mounting Dump target $_dev in rw mode." mount -o remount,rw $_dev $_mp || return 1 fi 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_failure_action() { echo "Kdump: Executing failure action $FAILURE_ACTION" eval $FAILURE_ACTION } do_final_action() { eval $FINAL_ACTION }