mysql主从延迟监控脚本示例

[mysql@SZDB run]$ more ck_slave_lag.sh
#!/bin/bash
#set -x
if [ $# -ne 3 ];then
      echo "usage:"
      echo "ck_slave_lag.sh <Servier-id> <MaxLag> <LogDir>"
      exit 0;
fi

ServerID=$1
MaxLag=$2
LogDir=$3
Timestamp=`date +%Y%m%d_%H%M%S`
Rentition=7
LogFile=$LogDir/slave_lag_$Timestamp.log
LagDetail=$LogDir/slave_lag_Detail_$Timestamp.log
mailadd=leshami@12306.cn
echo $ServerID
echo $MaxLag
echo $LogDir
echo $LogFile
echo $LagDetail
echo $mailadd
if [ ! -d $LogDir ];then
    mkdir -p $LogDir
fi
Lag=`/usr/bin/pt-heartbeat --user=monitor --password=xxx -S /tmp/mysql.sock -D test --master-server-id=$ServerID --check`
Lag=`echo ${Lag%.*}`
#Lag=3
echo $Lag
ptStatus=`ps -ef|grep pt-heart|grep daemonize`
echo $ptStatus
if [ $Lag -gt $MaxLag ]; then
    echo "The current date is `date` at `hostname`."          >>$LogFile
    echo "The current lag log file is $LogFile."              >>$LogFile
    echo "The current replication lag is $Lag."               >>$LogFile
    echo "The replication lag is larger than max lag $MaxLag." >>$LogFile
    if [ -z "$ptStatus" ] ; then
        echo "Start a monitor daemon with below command: "        >>$LogFile
        echo "pt-heartbeat --user=monitor --password=xxx -S /tmp/mysql.sock -D test " >>$LogFile
        echo " --master-server-id=11 --monitor --print-master-server-id --daemonize --log=$LagDetail" >>$LogFile
        /usr/bin/pt-heartbeat --user=monitor --password=xxx -S /tmp/mysql.sock -D test
        --master-server-id=$ServerID --monitor --print-master-server-id --daemonize --log=$LagDetail
        echo "More detail please check lag log from $LagDetail." >>$LogFile
        cat $LogFile | mutt -s "Found slave lag on `hostname`." $mailadd
    fi
fi
if [ -n "$ptStatus" ] ; then
    STime=`ps -ef|grep pt-heart|grep daemonize |glinuxjishu/13830.html target=_blank class=infotextkey>awk '{print $5}'`
    Pid=`ps -ef|grep pt-heart|grep daemonize |gawk '{print $2}'`
    STime=`date '+%Y%m%d'`" "$STime
    s_STime=`date -d "$STime" '+%s'`
    s_ETime=`date +%s`
    DiffSec=`expr $s_ETime - $s_STime`
    echo $STime
    echo $s_STime
    echo $s_ETime
    echo $DiffSec
    if [ "$DiffSec" -gt 1800 ]; then
       echo "kill -9 $Pid"
       kill -9 $Pid
    fi
fi
# Remove history slave lag log.
find $LogDir -name "*slave_lag*" -ctime +$Rentition -delete
exit

[mysql@SZDB run]$ crontab -l
#check slave lag
*/1 * * * * /run/ck_slave_lag.sh 11 3 /log/SlaveLag