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On actual testing, I could see that kvmheartbeat.sh script fails on NFS server failure and stops the agent only. Any HA VMs could be launched in different hosts, and recovery of NFS server could lead to a state where a HA enabled VM runs on two hosts and can potentially cause disk corruptions. In most cases, VM disk corruption will be worse than VM downtime. I've kept the sleep interval between check/rounds but reduced it to 10s. The change in behaviour was introduced in #2722. Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
167 lines
3.2 KiB
Bash
Executable File
167 lines
3.2 KiB
Bash
Executable File
#!/bin/bash
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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help() {
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printf "Usage: $0
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-i nfs server ip
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-p nfs server path
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-m mount point
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-h host
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-r write/read hb log
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-c cleanup
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-t interval between read hb log\n"
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exit 1
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}
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#set -x
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NfsSvrIP=
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NfsSvrPath=
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MountPoint=
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HostIP=
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interval=
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rflag=0
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cflag=0
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while getopts 'i:p:m:h:t:rc' OPTION
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do
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case $OPTION in
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i)
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NfsSvrIP="$OPTARG"
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;;
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p)
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NfsSvrPath="$OPTARG"
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;;
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m)
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MountPoint="$OPTARG"
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;;
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h)
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HostIP="$OPTARG"
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;;
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r)
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rflag=1
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;;
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t)
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interval="$OPTARG"
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;;
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c)
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cflag=1
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;;
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*)
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help
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;;
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esac
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done
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if [ -z "$NfsSvrIP" ]
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then
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exit 1
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fi
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#delete VMs on this mountpoint
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deleteVMs() {
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local mountPoint=$1
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vmPids=$(ps aux| grep qemu | grep "$mountPoint" | awk '{print $2}' 2> /dev/null)
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if [ $? -gt 0 ]
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then
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return
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fi
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if [ -z "$vmPids" ]
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then
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return
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fi
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for pid in $vmPids
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do
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kill -9 $pid &> /dev/null
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done
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}
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#checking is there the same nfs server mounted under $MountPoint?
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mounts=$(cat /proc/mounts |grep nfs|grep $MountPoint)
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if [ $? -gt 0 ]
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then
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# remount it
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mount $NfsSvrIP:$NfsSvrPath $MountPoint -o sync,soft,proto=tcp,acregmin=0,acregmax=0,acdirmin=0,acdirmax=0,noac,timeo=133,retrans=10 &> /dev/null
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if [ $? -gt 0 ]
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then
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printf "Failed to remount $NfsSvrIP:$NfsSvrPath under $MountPoint"
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exit 1
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fi
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if [ "$rflag" == "0" ]
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then
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deleteVMs $MountPoint
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fi
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fi
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hbFolder=$MountPoint/KVMHA/
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hbFile=$hbFolder/hb-$HostIP
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write_hbLog() {
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#write the heart beat log
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stat $hbFile &> /dev/null
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if [ $? -gt 0 ]
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then
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# create a new one
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mkdir -p $hbFolder &> /dev/null
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touch $hbFile &> /dev/null
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if [ $? -gt 0 ]
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then
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printf "Failed to create $hbFile"
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return 2
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fi
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fi
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timestamp=$(date +%s)
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echo $timestamp > $hbFile
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return $?
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}
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check_hbLog() {
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now=$(date +%s)
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hb=$(cat $hbFile)
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diff=`expr $now - $hb`
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if [ $diff -gt $interval ]
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then
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return 1
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fi
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return 0
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}
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if [ "$rflag" == "1" ]
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then
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check_hbLog
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if [ $? == 0 ]
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then
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echo "=====> ALIVE <====="
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else
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echo "=====> DEAD <======"
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fi
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exit 0
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elif [ "$cflag" == "1" ]
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then
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/usr/bin/logger -t heartbeat "kvmheartbeat.sh will reboot system because it was unable to write the heartbeat to the storage."
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sync &
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sleep 5
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echo b > /proc/sysrq-trigger
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exit $?
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else
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write_hbLog
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exit $?
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fi
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