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# These variables and functions are useful in 2nd kernel . /lib/kdump-lib.sh . /lib/kdump-logger.sh 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" KDUMP_SCRIPT_DIR="/kdumpscripts" DD_BLKSIZE=512 FINAL_ACTION="systemctl reboot -f" KDUMP_CONF="/etc/kdump.conf" KDUMP_PRE="" KDUMP_POST="" NEWROOT="/sysroot" OPALCORE="/sys/firmware/opal/mpipl/core" #initiate the kdump logger dlog_init if [ $? -ne 0 ]; then echo "failed to initiate the kdump logger." exit 1 fi get_kdump_confs() { local config_opt config_val while read config_opt config_val; do # remove inline comments after the end of a directive. case "$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" ;; 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 $config_val in reboot) FINAL_ACTION="systemctl reboot -f" ;; halt) FINAL_ACTION="halt" ;; poweroff) FINAL_ACTION="systemctl poweroff -f" ;; esac ;; esac done <<< "$(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 } # 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 } # dump_fs <mount point> dump_fs() { local _exitcode local _mp=$1 ddebug "dump_fs _mp=$_mp" if ! is_mounted "$_mp"; then dinfo "dump path \"$_mp\" is not mounted, trying to mount..." mount --target $_mp if [ $? -ne 0 ]; then derror "failed to dump to \"$_mp\", it's not a mount point!" return 1 fi 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"` dinfo "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-$DATEDIR/" save_opalcore_fs "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/" dinfo "saving vmcore" $CORE_COLLECTOR /proc/vmcore $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete _exitcode=$? if [ $_exitcode -eq 0 ]; then sync -f "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete" _sync_exitcode=$? if [ $_sync_exitcode -eq 0 ]; then mv "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore-incomplete" "$_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore" dinfo "saving vmcore complete" else derror "sync vmcore failed, _exitcode:$_sync_exitcode" return 1 fi else derror "saving vmcore failed, _exitcode:$_exitcode" fi dinfo "saving the $KDUMP_LOG_FILE to $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/" save_log mv $KDUMP_LOG_FILE $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/ if [ $_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 } save_vmcore_dmesg_fs() { local _dmesg_collector=$1 local _path=$2 dinfo "saving vmcore-dmesg.txt to ${_path}" $_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 chmod 600 ${_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 dinfo "saving vmcore-dmesg.txt complete" else derror "saving vmcore-dmesg.txt failed" fi } save_opalcore_fs() { local _path=$1 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 ${_path}/opalcore" cp $OPALCORE ${_path}/opalcore if [ $? -ne 0 ]; then derror "saving opalcore failed" return 1 fi sync dinfo "saving opalcore complete" return 0 } dump_to_rootfs() { dinfo "Trying to bring up rootfs device" systemctl start dracut-initqueue dinfo "Waiting for rootfs mount, will timeout after 90 seconds" systemctl start sysroot.mount ddebug "NEWROOT=$NEWROOT" dump_fs $NEWROOT } kdump_emergency_shell() { echo "PS1=\"kdump:\\\${PWD}# \"" >/etc/profile ddebug "Switching to dracut emergency..." /bin/dracut-emergency rm -f /etc/profile } do_failure_action() { dinfo "Executing failure action $FAILURE_ACTION" eval $FAILURE_ACTION } do_final_action() { dinfo "Executing final action $FINAL_ACTION" eval $FINAL_ACTION }