keepalived监控mysql进程脚本 监控mysql服务

原始出处：http://wangsheng1.blog.51cto.com/29473/1584949

有修改

监控MySQL有两种方法，一种是通过官方的check_mysql插件，另一种是通过第三方的check_mysql_health的插件。check_mysql_health的功能更为强大一些，这里我两种都简单的说下。

第一种方法：使用nagios-plugins 官方自带的chech_mysql插件

监控mysql可能在nagios服务器上没有官方的mysql的检测的插件。

需要先
yum install mysql-devel

然后在重新编译安装一次nagios-plugins插件

查看现在已经有了

[root@c65mini ~]# ll /usr/local/nagios/libexec/check_mysql
-rwxr-xr-x 1 nagios nagios 190768 10月 8 14:02 /usr/local/nagios/libexec/check_mysql

登陆进命令行模式

mysql -uroot -p

在被监控的远程服务器上（mysql服务器上）要先创建一个可以远程登陆mysql服务器的账号

GRANT ALL PRIVILEGES ON *.* TO 'nagios'@'192.168.163.129' IDENTIFIED BY 'nagios';

查看用户已经有了nagios用户

select user,host from mysql.user;

在监控主机上添加命令，需要修改commands.cfg

vim /usr/local/nagios/etc/objects/commands.cfg

#check mysql
define command{
command_name check_mysql
command_line $USER1$/check_mysql -H $HOSTADDRESS$ -P $ARG1$ -u $ARG2$ -p $ARG3$
}

因为是yum安装所以

cp /usr/local/nagios/libexec/check_mysql_health /usr/lib64/nagios/plugins/

或者

# ./configure  --libexecdir=/usr/lib64/nagios/plugins/

在监控主机上添加监控的服务

define service{
use generic-service,srv-pnp
host_name mysql-master-1
service_description MYSQL
check_command check_mysql!3306!nagios!nagios
notifications_enabled 1
}

测试下nagios的配置是否有错误

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

没问题重启nagios服务

/etc/init.d/nagios restart

 

第二种方法：check_mysql_health插件比起官方的check_mysql插件功能更为强大，check_mysql_health不但能监控MySQL是否正常运行，还能监控MySQL主从、MySQL连接数情况、MySQL慢查询等多种监控指标。

check_mysql_health官方介绍主页：http://labs.consol.de/nagios/check_mysql_health/

安装check_mysql_health插件

wget http://labs.consol.de/download/shinken-nagios-plugins/check_mysql_health-2.1.8.2.tar.gz
tar zxvf check_mysql_health-2.1.8.2.tar.gz
cd check_mysql_health-2.1.8.2
./configure
make
make install

check_mysql_health插件基本用法

/usr/local/nagios/libexec/check_mysql_health --hostname 192.168.163.130 --port 3306 --username nagios --password nagios --mode slow-queries

[root@link-1 objects]#  /usr/local/nagios/libexec/check_mysql_health --hostname 172.16.1.1 --port 3306 --username nagios --password nagios --mode slow-queries
CRITICAL - cannot connect to information_schema. install_driver(mysql) failed: Can't locate DBD/mysql.pm in @INC (@INC contains: /usr/local/nagios/libexec /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at (eval 18) line 3.
Perhaps the DBD::mysql perl module hasn't been fully installed,
or perhaps the capitalisation of 'mysql' isn't right.
Available drivers: DBM, ExampleP, File, Gofer, Proxy, SQLite, Sponge.
 at /usr/local/nagios/libexec/check_mysql_health line 1963

[root@link-1 ~]# yum -y install perl-DBD-MySQL.x86_64

[root@link-166 objects]#  /usr/local/nagios/libexec/check_mysql_health --hostname 172.16.1.1 --port 3306 --username nagios --password nagios --mode slow-queries
OK - 5 slow queries in 1464849671 seconds (0.00/sec) | slow_queries_rate=0.00%;0.1;1

各参数的含义，尤其–mode参数有很多监控的指标可以参考，具体查看官网可以知。

--hostname　定义被监控主机的IP或机器名 --port　　　  定义被监控主机上MySQL的运行端口 --username　定义被监控主机上MySQL的用户名 --password　 定义被监控主机上MySQL的密码 --mode　　　定义被监控主机上MySQL的监控指标

和官方插件类似，首先要建立一个可以用于远程登陆的mysql账号

GRANT ALL PRIVILEGES ON *.* TO 'nagios'@'192.168.163.130' IDENTIFIED BY 'nagios';

在监控主机上添加可以让命令以便让监控主机识别这个插件。

vi /usr/local/nagios/etc/objects/commands.cfg
define command{
        command_name check_mysql_health
        command_line $USER1$/check_mysql_health --hostname $ARG1$ --port $ARG2$ --username $ARG3$ --password $ARG4$ --mode $ARG5$
        }

在监控主机上添加要监控的服务

监控MySQL连接时间
define service{
use generic-service ; Name of service template to use
host_name mysql-master-1
service_description check_mysql_connection_time
check_command check_mysql_health!192.168.163.130!3306!nagios!nagios!connection-time
notifications_enabled 1
}
;监控MySQL连接数
define service{
use generic-service ; Name of service template to use
host_name mysql-master-1
service_description check_mysql_threads_connected
check_command check_mysql_health!192.168.163.130!3306!nagios!nagios!threads-connected
notifications_enabled 1
}
;监控MySQL慢查询情况
define service{
use generic-service ; Name of service template to use
host_name mysql-master-1
service_description check_mysql_slow_queries
check_command check_mysql_health!192.168.163.130!3306!nagios!nagios!slow-queries
notifications_enabled 1
}
;监控MySQL锁表情况
define service{
use generic-service ; Name of service template to use
host_name mysql-master-1
service_description check_mysql_table_lock_contention
check_command check_mysql_health!192.168.163.130!3306!nagios!nagios!table-lock-contention
notifications_enabled 1
}

如果web面板可能提示错误：

CRITICAL – statefilesdir /var/tmp/check_mysql_health does not exist or is not writable

可能和权限关系或者/var/temp下没有这个check_mysql_health

查看下check_mysql_health的权限所属。

[root@c65mini ~]# ll /usr/local/nagios/libexec/check_mysql_health 
-rwxr-xr-x 1 root root 122024 10月 9 15:57 /usr/local/nagios/libexec/check_mysql_health

插件的权限应该所属nagios用户和组，因此修改之。

chown nagios:nagios /usr/local/nagios/libexec/check_mysql_health

软链接一个

ln -s /usr/local/nagios/libexec/check_mysql_health /var/tmp/check_mysql_health

也可以：

chown nagios.nagios /var/tmp/check_mysql_health -R 

转载于:https://blog.51cto.com/wangqh/1785499