利用 nagios 自带的插件来监控 mysql 的主从同步状态 （监控多实例）
Nagios监控Mysql主从同步
################################################
使用check_mysql插件 检查mysql主从同步（3307为从库）
################################################
[主动方式]
1、调试check_mysql主从同步的命令
登录到从库的服务器上进行如下操作：
[root@centos4 ~]# mysql -u root -p -S /data/3307/mysql.sock
mysql> grant super,replication slave on *.* to hackbase@'192.168.1.%' identified by 'wanqiu';
Query OK, 0 rows affected (0.00 sec)
mysql> exit
Bye
接下来我们登录到nagios服务端：
1、用check_mysql插件进行检测
[root@nagios ~]# cd /usr/local/nagios/libexec/
[root@nagios libexec]# ./check_mysql -uhackbase -p wanqiu -s /data/3307/mysql.sock -P3307 -H 192.168.1.123 -S
Uptime: 10848 Threads: 1 Questions: 24 Slow queries: 0 Opens: 13 Flush tables: 1 Open tables: 7 Queries per second avg: 0.002 Slave IO: Yes Slave SQL: Yes Seconds Behind Master: 0
2、编辑commands.cfg
[root@nagios libexec]# cd ../etc/objects/
[root@nagios objects]# vi host.cfg
******************************************
define host{
use linux-server
host_name mysql-tongbu
alias mysql-tongbu
address 192.168.1.123
process_perf_data 1
}
define hostgroup{
hostgroup_name linux-servers
alias Linux Servers
members mysql-tongbu
}
define hostextinfo {
host_name mysql-tongbu
action_url /nagios/pnp/index.php?host=$HOSTNAME$
}
******************************************
[root@nagios objects]# vi commands.cfg
******************************************
# 'check_mysql_slave' command definition
define command{
command_name check_mysql_slave
command_line $USER1$/check_mysql -uhackbase -p wanqiu -s /data/3307/mysql.sock -P3307 -H 192.168.1.123 -S
}
******************************************
3、添加检查mysql同步的服务配置
[root@nagios objects]# vi service.cfg
**********************************************************
define service {
use generic-service
host_name mysql-tongbu
service_description check_mysql_slave
check_command check_mysql_slave
max_check_attempts 2
normal_check_interval 4
retry_check_interval 4
check_period 24x7
notification_interval 1440
notification_period 24x7
notification_options w,u,c,r
contact_groups admins
process_perf_data 1
}
**********************************************************
4、检查语法并重起nagios
/etc/init.d/nagios checkconfig
/etc/init.d/nagios reload
5、进入界面查看变化
不同步状态时的内容，界面服务那一行为红色
check_mysql_slave CRITICAL 04-24-2011 17:20:11 0d 0h 0m 21s 1/2
Slave IO: No Slave SQL: Yes Seconds Behind Master: (null)
同步状态时的内容，界面服务那一行为绿色
check_mysql_slave OK 04-24-2011 17:28:11 0d 0h 2m 35s 1/2 Uptime: 182 Threads: 1 Questions: 7 Slow queries: 0 Opens: 11 Flush tables: 1 Open tables: 6 Queries per second avg: 0.038
Slave IO: Yes Slave SQL: Yes Seconds Behind Master: 0
如下图所示：
(全文完)