CentOS下編寫shell劇本來監控MySQL主從復制的教程

CentOS下編寫shell劇本來監控MySQL主從復制的教程。本站提示廣大學習愛好者：（CentOS下編寫shell劇本來監控MySQL主從復制的教程）文章只能為提供參考，不一定能成為您想要的結果。以下是CentOS下編寫shell劇本來監控MySQL主從復制的教程正文

目標：准時監控MySQL主從數據庫能否同步，假如分歧步，記載毛病時光，並履行敕令使主從恢復同步狀況

1、創立劇本文件

vi /home/crontab/check_mysql_slave.sh  #編纂，添加上面代碼

#!/bin/sh

# check_mysql_slave status

ip=eth0 #網卡稱號

mysql_binfile=/usr/local/mysql/bin/mysql

mysql_user=root #MySQL數據庫賬號

mysql_pass=123456 #暗碼

mysql_sockfile=/tmp/mysql.sock

datetime=`date +"%Y-%m-%d/%H:%M:%S"`  #獲得以後時光

mysql_slave_logfile=/home/logs/check_mysql_slave.log  #日記文件途徑，必需提早創立好

slave_ip=`ifconfig $ip|grep "inet addr" | awk -F[:" "]+ '{print $4}'`

status=$($mysql_binfile -u$mysql_user -p$mysql_pass -S $mysql_sockfile -e "show slave status\G" | grep -i "running")

Slave_IO_Running=`echo $status | grep Slave_IO_Running | awk ' {print $2}'`

Slave_SQL_Running=`echo $status | grep Slave_SQL_Running | awk '{print $2}'`

if [ "$Slave_IO_Running" = "Yes" -a "$Slave_SQL_Running" = "Yes" ]

then echo "Slave is Running!"

else

echo " $datetime $slave_ip Slave is not running!" >> $mysql_slave_logfile

$mysql_binfile -u$mysql_user -p$mysql_pass -S $mysql_sockfile -e "SLAVE STOP;"

$mysql_binfile -u$mysql_user -p$mysql_pass -S $mysql_sockfile -e "SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1;"

$mysql_binfile -u$mysql_user -p$mysql_pass -S $mysql_sockfile -e "SLAVE START;"

$mysql_binfile -u$mysql_user -p$mysql_pass -S $mysql_sockfile -e "EXIT"

fi

:wq! #保留加入

chmod +x /home/crontab/check_mysql_slave.sh #添加劇本履行權限

2、添加義務籌劃，修正/etc/crontab

vi /etc/crontab #在最初一行添加

*/10 * * * * root /home/crontab/check_mysql_slave.sh #表現每10分鐘履行一次

:wq! #保留加入

3、從新啟動crond使設置失效

/etc/rc.d/init.d/crond restart  #yum install -y vixie-cron裝置籌劃義務，某些體系上能夠沒有預裝

chkconfig crond on #設為開機啟動

service crond start #啟動

可以依據日記文件/home/logs/check_mysql_slave.log檢查MySQL主從同步狀況

PS：接上去這個劇本增長了“當發明同步湧現沒法同步的時刻”會主動提取主庫的file號，和pos,停止同步主庫，劇本內容以下：
 

#!/bin/sh
#set -x
#file is slave_repl.sh
#Author by Kevin
#date is 2011-11-13

mstool="/usr/local/mysql-3307/bin/mysql -h 192.168.1.106 -uroot -pw!zl7POg27 -P 3307"
sltool="/usr/local/mysql-3307/bin/mysql -h 192.168.1.107 -uroot -pw!zl7POg27 -P 3307"
declare -a slave_stat
slave_stat=($($sltool -e "show slave status\G"|grep Running |awk '{print $2}'))
if [ "${slave_stat[0]}" = "Yes" -a "${slave_stat[1]}" = "Yes" ]
   then
   echo "OK slave is running"
   exit 0
else
   echo "Critical slave is error"
   echo
   echo "*********************************************************"
   echo "Now Starting replication with Master Mysql!"
    file=`$mstool -e "show master status\G"|grep "File"|awk '{print $2}'` 
    pos=`$mstool -e "show master status\G"|grep "Pos"|awk '{print $2}'` 
    $sltool -e "slave stop;change master to master_host='192.168.1.106',master_port=3307,master_user='repl',master_password='w!zl7POg27',master_log_file='$file',master_log_pos=$pos;slave start;"
    sleep 3
    $sltool -e "show slave status\G;"|grep Running
  echo
  echo "Now Replication is Finished!"
  echo
  echo "**********************************************************"
    exit 2
fi

# ./slave_stop3307.sh 
*******************************
Now stop Slave Replication!
      Slave_IO_Running: No
     Slave_SQL_Running: No
*******************************
# ./slave_repl3307.sh 
Critical slave is error
*********************************************************
Now Starting replication with Master Mysql!
      Slave_IO_Running: Yes
     Slave_SQL_Running: Yes
Now Replication is Finished!
**********************************************************