kexec-tools/dracut-kdump.sh

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#!/bin/sh
. /lib/dracut-lib.sh
set -x
KDUMP_PATH="/var/crash"
CORE_COLLECTOR=""
DEFAULT_CORE_COLLECTOR="makedumpfile -c --message-level 1 -d 31"
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DEFAULT_ACTION="dump_rootfs"
DATEDIR=`date +%d.%m.%y-%T`
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"
export PATH=$PATH:$KDUMP_SCRIPT_DIR
# we use manual setup nics in udev rules,
# so we need to test network is really ok
wait_for_net_ok() {
local ip=$(getarg ip)
local iface=`echo $ip|cut -d':' -f1`
return $(wait_for_route_ok $iface)
}
do_default_action()
{
wait_for_loginit
$DEFAULT_ACTION
}
add_dump_code()
{
DUMP_INSTRUCTION=$1
}
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get_mp()
{
local _mp
local dev mp fs opts rest
while read dev mp fs opts rest; do
if [ "$dev" = "$1" ]; then
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_mp="$mp"
break
fi
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done < /proc/mounts
echo "$_mp"
}
to_dev_name()
{
local dev="$1"
case "$dev" in
UUID=*)
dev=`blkid -U "${dev#UUID=}"`
;;
LABEL=*)
dev=`blkid -L "${dev#LABEL=}"`
;;
esac
echo $dev
}
dump_localfs()
{
local _dev=`to_dev_name $1`
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local _mp=`get_mp $_dev`
if [ "$_mp" = "$NEWROOT/" ] || [ "$_mp" = "$NEWROOT" ]
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then
mount -o remount,rw $_mp || return 1
fi
mkdir -p $_mp/$KDUMP_PATH/$DATEDIR
$CORE_COLLECTOR /proc/vmcore $_mp/$KDUMP_PATH/$DATEDIR/vmcore || return 1
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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_rootfs()
{
mount -o remount,rw $NEWROOT/ || return 1
mkdir -p $NEWROOT/$KDUMP_PATH/$DATEDIR
$CORE_COLLECTOR /proc/vmcore $NEWROOT/$KDUMP_PATH/$DATEDIR/vmcore || return 1
sync
}
dump_nfs()
{
mount -o remount,rw $NEWROOT/ || return 1
[ -d $NEWROOT/mnt ] || mkdir -p $NEWROOT/mnt
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mount -o nolock -o tcp -t nfs $1 $NEWROOT/mnt/ || return 1
mkdir -p $NEWROOT/mnt/$KDUMP_PATH/$DATEDIR || return 1
$CORE_COLLECTOR /proc/vmcore $NEWROOT/mnt/$KDUMP_PATH/$DATEDIR/vmcore || return 1
umount $NEWROOT/mnt/ || return 1
return 0
}
dump_ssh()
{
local _opt="-i $1 -o BatchMode=yes -o StrictHostKeyChecking=yes"
local _dir="$KDUMP_PATH/$DATEDIR"
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 "^net.*@" $conf_file
}
is_raw_dump_target()
{
grep -q "^raw" $conf_file
}
read_kdump_conf()
{
if [ ! -f "$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
;;
default)
case $config_val in
shell)
DEFAULT_ACTION="sh -i -l"
;;
reboot)
DEFAULT_ACTION="reboot -f"
;;
halt)
DEFAULT_ACTION="halt -f"
;;
poweroff)
DEFAULT_ACTION="poweroff -f"
;;
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)
add_dump_code "dump_localfs $config_val"
;;
raw)
add_dump_code "dump_raw $config_val"
;;
net)
wait_for_net_ok
if [[ "$config_val" =~ "@" ]]; then
add_dump_code "dump_ssh $SSH_KEY_LOCATION $config_val"
else
add_dump_code "dump_nfs $config_val"
fi
;;
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
if [ -z "$DUMP_INSTRUCTION" ]; then
add_dump_code "dump_rootfs"
fi
$DUMP_INSTRUCTION
DUMP_RETVAL=$?
if [ $DUMP_RETVAL -ne 0 ]; then
do_default_action
fi
$FINAL_ACTION