监控mysql主从数据一致,监控MySQL主从同步
脚本监控数据库主从同步
来源：http://oldboy.blog.51cto.com/2561410/1632876
来源：
(生产实战案例)：监控MySQL主从同步是否异常，如果异常，则发送短信或者邮件给管理员。提示：如果没主从同步环境,可以用下面文本放到文件里读取来模拟：
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)，则跳过错误。
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@oldboy~]# mysql -uroot -p'oldboy' -S /data/3307/mysql.sock -e "show slavestatus\G;"
*************************** 1. row ***************************
Slave_IO_State:Waiting for master to send event
Master_Host:10.0.0.179 #当前的mysql master服务器主机
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File:mysql-bin.000013
Read_Master_Log_Pos: 502547
Relay_Log_File:relay-bin.000013
Relay_Log_Pos:251
Relay_Master_Log_File:mysql-bin.000013
Slave_IO_Running:Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB: mysql
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 502547
Relay_Log_Space:502986
Until_Condition:None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0 #和主库比同步延迟的秒数，这个参数很重要
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
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第一关解决
[root@LAMP script]# cat mysqlzcjk.sh
#!/bin/sh
. /etc/init.d/functions
while true
do
num=0
array=($(egrep "_Running|Behind_Master" slave.log |awk '{print $NF}' ))
for status in ${array[*]}
do
if [ "$status" = "Yes" -o "$status" = "0" ]
then
let num=num+1
fi
done
if [ $num -eq 3 ]
then
action "MySQL slave is OK" /bin/true |tee success.log
cat success.log |mail -s "$char" [email protected]
else
action "MySQL slave is not OK" /bin/false | tee error.log
cat error.log |mail -s "$char" [email protected]
fi
sleep 30
done
##在生成情况，用下面命令取主从同步状态
##mysql -uroot -plvnian -e "show slave status\G;"|egrep "_Running|Behind_Master" |awk '{print $NF}'
=================
[root@LAMP script]# sh mysqlzcjk.sh
MySQL slave is not OK [FAILED]
MySQL slave is not OK [FAILED]
MySQL slave is not OK [FAILED]
MySQL slave is not OK [FAILED]
MySQL slave is not OK [FAILED]
MySQL slave is not OK [FAILED]
MySQL slave is not OK [FAILED]
MySQL slave is OK [ OK ]
MySQL slave is OK [ OK ]
#######################################################################
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第二第三关
#!/bin/sh
. /etc/init.d/functions
while true
do
num=0
errorno=(1158 1159 1007 1008 1062)
array=($(egrep "_Running|Behind_Master|SQL_Errno" slave.log |awk '{print $NF}' ))
for status in ${array[*]}
do
if [ "$status" = "Yes" -o "$status" = "0" ]
then
let num=num+1
fi
done
if [ $num -eq 3 ]
then
action "MySQL slave is OK" /bin/true |tee success.log
cat success.log |mail -s "$char" [email protected]
else
action "MySQL slave is not OK" /bin/false | tee error.log
cat error.log |mail -s "$char" [email protected]
for ((i=0;i
if [ $array[3] -eq ${errorno[$i]} ]
then
mysql -uroot -plvnian -e "stop slave && set global sql_slave_skip_counter=1;start slave;"
fi
fi
sleep 10
done
##在生成情况，用下面命令取主从同步状态
##mysql -uroot -plvnian -e "show slave status\G;"|egrep "_Running|Behind_Master|SQL_Errno" |awk '{print $NF}'
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测试命令：
stop slave sql_thread;
start slave sql_thread;
stop slave io_thread ;
start slave io_thread ;
stop slave;
start slave;