#!/bin/sh . /lib/dracut-lib.sh set -o pipefail set -x KDUMP_PATH="/var/crash" CORE_COLLECTOR="" DEFAULT_CORE_COLLECTOR="makedumpfile -c --message-level 1 -d 31" DEFAULT_ACTION="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="reboot -f" DUMP_RETVAL=0 conf_file="/etc/kdump.conf" KDUMP_PRE="" KDUMP_POST="" export PATH=$PATH:$KDUMP_SCRIPT_DIR do_default_action() { wait_for_loginit $DEFAULT_ACTION } do_kdump_pre() { if [ -n "$KDUMP_PRE" ]; then "$KDUMP_PRE" fi } do_kdump_post() { if [ -n "$KDUMP_POST" ]; then "$KDUMP_POST" "$1" fi } add_dump_code() { DUMP_INSTRUCTION=$1 } dump_fs() { local _mp=$(findmnt -k -f -n -r -o TARGET $1) if [ -z "$_mp" ]; then echo "kdump: error: Dump target $1 is not mounted." return 1 fi if [ "$_mp" = "$NEWROOT/" ] || [ "$_mp" = "$NEWROOT" ] then mount -o remount,rw $_mp || return 1 fi mkdir -p $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR || return 1 $CORE_COLLECTOR /proc/vmcore $_mp/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore || return 1 umount $_mp || return 1 return 0 } dump_raw() { [ -b "$1" ] || return 1 echo "Saving to raw disk $1" if $(echo -n $CORE_COLLECTOR|grep -q makedumpfile); then _src_size_mb="Unknown" else _src_size=`ls -l /proc/vmcore | cut -d' ' -f5` _src_size_mb=$(($_src_size / 1048576)) fi monitor_dd_progress $_src_size_mb & $CORE_COLLECTOR /proc/vmcore | dd of=$1 bs=$DD_BLKSIZE >> /tmp/dd_progress_file 2>&1 || return 1 return 0 } dump_to_rootfs() { #For dumping to rootfs, "-F" need be removed. Surely only available for makedumpfile case. [[ $CORE_COLLECTOR = *makedumpfile* ]] && CORE_COLLECTOR=`echo $CORE_COLLECTOR | sed -e s/-F//g` mount -o remount,rw $NEWROOT/ || return 1 mkdir -p $NEWROOT/$KDUMP_PATH/$HOST_IP-$DATEDIR $CORE_COLLECTOR /proc/vmcore $NEWROOT/$KDUMP_PATH/$HOST_IP-$DATEDIR/vmcore || return 1 sync } dump_ssh() { local _opt="-i $1 -o BatchMode=yes -o StrictHostKeyChecking=yes" local _dir="$KDUMP_PATH/$HOST_IP-$DATEDIR" cat /var/lib/random-seed > /dev/urandom ssh -q $_opt $2 mkdir -p $_dir || return 1 if [ "${CORE_COLLECTOR%% *}" = "scp" ]; then scp -q $_opt /proc/vmcore "$2:$_dir/vmcore-incomplete" || return 1 ssh $_opt $2 "mv $_dir/vmcore-incomplete $_dir/vmcore" || return 1 else $CORE_COLLECTOR /proc/vmcore | ssh $_opt $2 "dd bs=512 of=$_dir/vmcore-incomplete" || return 1 ssh $_opt $2 "mv $_dir/vmcore-incomplete $_dir/vmcore.flat" || return 1 fi } is_ssh_dump_target() { grep -q "^ssh[[:blank:]].*@" $conf_file } is_nfs_dump_target() { grep -q "^nfs.*:" $conf_file } is_raw_dump_target() { grep -q "^raw" $conf_file } get_host_ip() { local _host if is_nfs_dump_target || is_ssh_dump_target then kdumpnic=$(getarg kdumpnic=) [ -z "$kdumpnic" ] && echo "failed to get kdumpnic!" && return 1 _host=`ip addr show dev $kdumpnic|grep 'inet '` [ $? -ne 0 ] && echo "Wrong kdumpnic: $kdumpnic" && return 1 _host="${_host##*inet }" _host="${_host%%/*}" [ -z "$_host" ] && echo "Wrong kdumpnic: $kdumpnic" && return 1 HOST_IP=$_host fi return 0 } read_kdump_conf() { if [ ! -f "$conf_file" ]; then echo "$conf_file not found" return fi # first get the necessary variables while read config_opt config_val; do 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" ;; default) case $config_val in shell) DEFAULT_ACTION="_emergency_shell kdump" ;; reboot) DEFAULT_ACTION="reboot -f" ;; halt) DEFAULT_ACTION="halt -f" ;; poweroff) DEFAULT_ACTION="poweroff -f" ;; dump_to_rootfs) DEFAULT_ACTION="dump_to_rootfs" ;; esac ;; esac done < $conf_file # rescan for add code for dump target while read config_opt config_val; do case "$config_opt" in ext[234]|xfs|btrfs|minix|nfs) add_dump_code "dump_fs $config_val" ;; raw) add_dump_code "dump_raw $config_val" ;; ssh) add_dump_code "dump_ssh $SSH_KEY_LOCATION $config_val" ;; esac done < $conf_file } read_kdump_conf if [ -z "$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 get_host_ip if [ $? -ne 0 ]; then echo "get_host_ip exited with non-zero status!" do_default_action $FINAL_ACTION fi if [ -z "$DUMP_INSTRUCTION" ]; then add_dump_code "dump_to_rootfs" fi do_kdump_pre if [ $? -ne 0 ]; then echo "kdump_pre script exited with non-zero status!" $FINAL_ACTION fi $DUMP_INSTRUCTION DUMP_RETVAL=$? do_kdump_post $DUMP_RETVAL if [ $? -ne 0 ]; then echo "kdump_post script exited with non-zero status!" fi if [ $DUMP_RETVAL -ne 0 ]; then do_default_action fi $FINAL_ACTION