nagios监控mysql主从复制
下手处:登陆mysql从服务器,通过执行 mysql> show slave status\G 查看其输出,即可判定主从复制是否正常。下面是某个从服务器的输出:
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.10.231
Master_User: rep1
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 1752541
Relay_Log_File: hy-mysql3-relay-bin.000088
Relay_Log_Pos: 2339
Relay_Master_Log_File: mysql-bin.000004
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
这个输出,最关键处就是"Slave_IO_Running: Yes“和“Slave_SQL_Running: Yes”,这两个值全是"Yes"就表明主从复制正常,否则就是有问题。
操作步骤:
1、在主数据库服务器增加一个用户,给予较低的权限,操作为
mysql > grant Replication client on *.* to 'nagios'@'%' identified by 'nagios';
mysql> flush privileges;
4、编写脚本/usr/local/nrpe/libexec/check_mysql_slave(这是监控其作用的核心),其内容如下:
#!/bin/bash
declare -a slave_is
slave_is=($(/opt/mysql/bin/mysql -unagios -pnagios -e "show slave status\G"|grep Running |awk '{print $2}'))
if [ "${slave_is[0]}" = "Yes" -a "${slave_is[1]}" = "Yes" ]
then
echo "OK -slave is running"
exit 0
else
echo "Critical -slave is error"
exit 2
fi
下手处:登陆mysql从服务器,通过执行 mysql> show slave status\G 查看其输出,即可判定主从复制是否正常。下面是某个从服务器的输出:
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.10.231
Master_User: rep1
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 1752541
Relay_Log_File: hy-mysql3-relay-bin.000088
Relay_Log_Pos: 2339
Relay_Master_Log_File: mysql-bin.000004
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
这个输出,最关键处就是"Slave_IO_Running: Yes“和“Slave_SQL_Running: Yes”,这两个值全是"Yes"就表明主从复制正常,否则就是有问题。
操作步骤:
1、在主数据库服务器增加一个用户,给予较低的权限,操作为
mysql > grant Replication client on *.* to 'nagios'@'%' identified by 'nagios';
mysql> flush privileges;
2、登陆从服务器验证一下,看是否正常。操作为
mysql -unagios -pnagios -e "show slave stutas\G"
注意:这个操作是在 shell下操作的!!
mysql -unagios -pnagios -e "show slave stutas\G"
注意:这个操作是在 shell下操作的!!
3、在从服务器安装 nrpe,然后在配置文件nrpe.cfg加入一行
command[check_mysql_slave]=/usr/local/nrpe/libexec/chech_mysql_slave
command[check_mysql_slave]=/usr/local/nrpe/libexec/chech_mysql_slave
4、编写脚本/usr/local/nrpe/libexec/check_mysql_slave(这是监控其作用的核心),其内容如下:
#!/bin/bash
declare -a slave_is
slave_is=($(/opt/mysql/bin/mysql -unagios -pnagios -e "show slave status\G"|grep Running |awk '{print $2}'))
if [ "${slave_is[0]}" = "Yes" -a "${slave_is[1]}" = "Yes" ]
then
echo "OK -slave is running"
exit 0
else
echo "Critical -slave is error"
exit 2
fi
5、执行
/usr/local/nagios/libexec/check_nrpe -H 192.168.10.231
/usr/local/nagios/libexec/check_nrpe -H 192.168.10.231 -c check_mysql_slave
观察其输出:
6、修改nagios,并测试。
/usr/local/nagios/libexec/check_nrpe -H 192.168.10.231
/usr/local/nagios/libexec/check_nrpe -H 192.168.10.231 -c check_mysql_slave
观察其输出:
6、修改nagios,并测试。
(1)vim /usr/local/nagios/etc/services.cfg
define service {
host_name 192.168.10.231
service_description check_mysql_slave #名字任意定义
check_period 24x7
max_check_attempts 1
normal_check_interval 3
retry_check_interval 2
contact_groups sagroup #填写属于的组
process_perf_data 1
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_mysql_slave #需要监控的对象,在从机中对应好
host_name 192.168.10.231
service_description check_mysql_slave #名字任意定义
check_period 24x7
max_check_attempts 1
normal_check_interval 3
retry_check_interval 2
contact_groups sagroup #填写属于的组
process_perf_data 1
notification_interval 10
notification_period 24x7
notification_options w,u,c,r
check_command check_nrpe!check_mysql_slave #需要监控的对象,在从机中对应好
}