From: "Fabio M. Di Nitto" <[email protected]> requires wdmd >= 2.6
Resolves: rhbz#509056 Signed-off-by: Fabio M. Di Nitto <[email protected]> --- cman/scripts/Makefile | 2 +- cman/scripts/checkquorum.wdmd | 104 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 105 insertions(+), 1 deletions(-) create mode 100644 cman/scripts/checkquorum.wdmd diff --git a/cman/scripts/Makefile b/cman/scripts/Makefile index b4866c8..7950311 100644 --- a/cman/scripts/Makefile +++ b/cman/scripts/Makefile @@ -1,4 +1,4 @@ -SHAREDIRTEX=checkquorum +SHAREDIRTEX=checkquorum checkquorum.wdmd include ../../make/defines.mk include $(OBJDIR)/make/clean.mk diff --git a/cman/scripts/checkquorum.wdmd b/cman/scripts/checkquorum.wdmd new file mode 100644 index 0000000..1d81ff6 --- /dev/null +++ b/cman/scripts/checkquorum.wdmd @@ -0,0 +1,104 @@ +#!/bin/bash +# Quorum detection watchdog script +# +# This script will return -2 if the node had quorum at one point +# and then subsequently lost it +# +# Copyright 2012 Red Hat, Inc. + +# defaults + +# Amount of time in seconds to wait after quorum is lost to fail script +waittime=60 + +# action to take if quorum is missing for over > waittime +# autodetect|hardreboot|crashdump|watchdog +action=autodetect + +# Location of temporary file to capture timeouts +timerfile="/var/run/cluster/checkquorum-timer" + +# rpm based distros +[ -d /etc/sysconfig ] && \ + [ -f /etc/sysconfig/checkquorum ] && \ + . /etc/sysconfig/checkquorum + +# deb based distros +[ ! -d /etc/sysconfig ] && \ + [ -f /etc/default/checkquorum ] && \ + . /etc/default/checkquorum + +has_quorum() { + corosync-quorumtool -s 2>/dev/null | \ + grep ^Quorate: | \ + grep -q Yes$ +} + +had_quorum() { + output="$(corosync-objctl 2>/dev/null | \ + grep runtime.totem.pg.mrp.srp.operational_entered | cut -d "=" -f 2)" + [ -n "$output" ] && { + [ "$output" -ge 1 ] && return 0 + return 1 + } +} + +take_action() { + case "$action" in + watchdog) + [ -n "$wdmd_action" ] && return 1 + ;; + hardreboot) + echo 1 > /proc/sys/kernel/sysrq + echo b > /proc/sysrq-trigger + ;; + crashdump) + echo 1 > /proc/sys/kernel/sysrq + echo c > /proc/sysrq-trigger + ;; + autodetect) + service kdump status > /dev/null 2>&1 + usekexec="$?" + [ -n "$wdmd_action" ] && [ "$usekexec" != "0" ] && return 1 + echo 1 > /proc/sys/kernel/sysrq + [ "$usekexec" = "0" ] && echo c > /proc/sysrq-trigger + echo b > /proc/sysrq-trigger + esac +} + +# watchdog uses $1 = test or = repair +# with no arguments we are called by wdmd +[ -z "$1" ] && wdmd_action=yes + +# we don't support watchdog repair action +[ "$1" = "repair" ] && exit 1 + +service corosync status > /dev/null 2>&1 +ret=$? + +case "$ret" in + 3) # corosync is not running (clean) + rm -f "$timerfile" + exit 0 + ;; + 1) # corosync crashed or did exit abonormally (dirty - take action) + logger -t checkquorum.wdmd "corosync crashed or exited abonarmally. Node will soon reboot" + take_action + ;; + 0) # corosync is running (clean) + # check quorum here + has_quorum && { + echo -e "oldtime=$(date +%s)" > "$timerfile" + exit 0 + } + . "$timerfile" + newtime="$(date +%s)" + delta=$((newtime - oldtime)) + logger -t checkquorum.wdmd "Node has lost quorum. Node will soon reboot" + had_quorum && [ "$delta" -gt "$waittime" ] && { + take_action + } + ;; +esac + +exit $? -- 1.7.7.6
