监控mysql主从同步状态是否异常

监控mysql主从同步状态是否异常，如果异常，则发生短信或邮寄给管理员

阶段1：开发一个守护进程脚本每30秒实现检测一次。

阶段2：如果同步出现如下错误号(1158,1159,1008,1007,1062)，请跳过错误

阶段3：请使用数组技术实现上述脚本（获取主从判断及错误号部分）

[root@slave ~]# mysql -u root -proot -e "show slave statusG;"
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.16.1.2      #当前的mysql master服务器主机
                  Master_User: myslave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.000003
          Read_Master_Log_Pos: 471
               Relay_Log_File: relay-log-bin.000002
                Relay_Log_Pos: 252
        Relay_Master_Log_File: master-bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
                     Master_SSL_Key: 
                           Seconds_Behind_Master: 0    #和主库比同步延迟的秒数

 准备：
 
 egrep "_Running|Behind_Master" slave.log   #过滤
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
        Seconds_Behind_Master: 0
        
 [root@slave ~]# egrep "_Running|Behind_Master" slave.log | awk ‘{print $NF}‘
Yes
Yes
0

阶段一：开发一个守护进程脚本每30秒实现检测一次。

#!/bin/bash
while true
do
  array=($(egrep "_Running|Behind_Master" slave.log|awk ‘{print $NF}‘))
  if [ "${array[0]}" == "Yes" -a "${array[1]}" == "Yes" -a "${array[2]}" == "0" ]
  then
    echo "MySQL is slave is ok"
  else
      char="MySQL slave is not ok"
      echo "$char"
      echo "$char"|mail -s "$char" 995345781@qq.com
      break
  fi
  sleep 30
done


执行结果：
[root@slave ~]# sh test.sh  
MySQL is slave is ok
MySQL is slave is ok

终极版：

#!/bin/bash
#Date:2017-7-3
#Author:xcn(baishuchao@yeah.net)
#version 1.0
mysql_cmd="mysql -u root -proot"
errorno=(1158 1159 1008 1007 1062)
while true
do
  array=($($mysql_cmd -e "show slave statusG"|egrep ‘_Running|Behind_Master|Last_SQL_Errno‘|awk ‘{print $NF}‘))
  if [ "${array[0]}" == "Yes" -a "${array[1]}" == "Yes" -a "${array[2]}" == "0" ]
  then
    echo "MySQL is slave is ok"
  else
      for ((i=0;i<${#errorno[*]};i++))
      do
        if [ "${array[3]}" = "${errorno[$i]}" ];then
        $mysql_cmd -e "stop slave &&set global sql_slave_skip_counter=1;start slave;"
        fi
      done
      char="MySQL slave is not ok"
      echo "$char"
      echo "$char"|mail -s "$char" 995345781@qq.com
      break
  fi
  sleep 30
done

提示：这个脚本可以用于生产环境中，监控mysql主从同步状态是否异常，根据

‘_Running|Behind_Master|Last_SQL_Errno‘

这个进行判断，如果不正常的话则会进一步判断状态码，然后进行输出，则会发邮件或短信给运维人员