基本信息

• Nagios：Nagios core 4.4.3
• Nagios Plugins：check_mysql_health 2.2.2
• Mysql-server: 192.168.0.91
• db user：db
• 操作流程：下載插件->安裝插件->配置command->添加主機->添加服務

安裝插件

1. 下載 wget https://labs.consol.de/assets/downloads/nagios/check_mysql_health-2.2.2.tar.gz
2. 配置、編譯、安裝

tar -xzvf check_mysql_health-2.2.2.tar.gz
cd check_mysql_health-2.2.2
# configure
./configure --prefix=/usr/local/nagios/libexec --with-nagios-user=nagios --with-nagios-group=nagios --with-perl=/usr/bin/perl
# make
sudo make
# install
sudo make install
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配置

配置插件

1. 添加check命令

cd /usr/local/nagios/etc/objects/
sudo vi commands.cfg
## add
define command {command_name check_mysql_healthcommand_line $USER1$/check_mysql_health -H $ARG1$ --username $ARG2$ --password $ARG3$ --port $ARG4$ --mode $ARG5$	
}
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2. 創建主機配置文件

cd /usr/local/nagios/etc/objects
sudo touch mysql92\1.cfg && sudo chown nagios:nagios mysql91.cfg
# add
# define a host use template linux-server
define host {use			linux-serverhost_name		mysql91alias		mysql server 91address		192.168.0.91
}
# define a new hostgroup
define hostgroup {hostgroup_name	mysql-serveralias		mysql-servermembers		mysql91
}
# define services with template generic-service
# mysql_conn_time
define service {use			generic-servicehost_name		mysql91service_description	mysql_conn_timecheck_command	check_mysql_health!192.168.0.91!db!MysqlPasswd2019!3306!connection-time!
}
# mysql_threads_connected
define service {use			generic-servicehost_name		mysql91service_description	mysql_threads_connectedcheck_command	check_mysql_health!192.168.0.91!db!MysqlPasswd2019!3306!threads-connected!
}
# mysql_slow_queries
define service {use			generic-servicehost_name		mysql91service_description mysql_slow_queriescheck_command	check_mysql_health!192.168.0.91!db!MysqlPasswd2019!3306!slow-queries!
}
# mysql_encde
define service {use			generic-servicehost_name		mysql91service_description mysql_sqlcheck_command	check_mysql_health!192.168.0.91!db!MysqlPasswd2019!3306!encode!
}
# mysql_open_files
define service {use			generic-servicehost_name		mysql91service_description mysql_open_filescheck_command	check_mysql_health!192.168.0.91!db!MysqlPasswd2019!3306!open-files!
}
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3. 更多Mysql檢查
   check_mysql_health插件通過修改--mode的參數來設定檢查項，其他檢查可以參考check_mysql_health mode參數
4. 檢查Nagios配置文件
   sudo /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg [站外圖片上傳中...(image-396093-1556865444556)]
5. 重啟Nagios服務，打開web界面查看新增的主機和服務
   sudo systemctl restart nagios

6. 測試報警
   將被監控主機的mysql服務關閉，查看Nagios Web平臺中的報警。

參考

1. check_mysql_health website