Zabbix 2.2 监控 MySQL

使用Zabbix 2.2系统自带的模板监控MySQL的状态。

配置环境

• CentOS 6.6及以上
• Zabbix 2.2
• MySQL
• 已关闭防火墙

配置Zabbix

1. 在zabbix的主机监控下添加Template App MySQL的监控项。

2. 在被监控的主机上建立一个不需要任何权限的MySQL账户：

    GRANT USAGE ON *.* TO 'zabbix'@'localhost' IDENTIFIED BY '密码';
    FLUSH PRIVILEGES;
   

3. 添加监控访问MySQL的配置文件

   新建一个文件.my.cnf，默认文件的位置应该是/var/lib/zabbix，这里我选择存放在/etc/zabbix/下。

   .my.cnf内容

    # Zabbix Agent
    [mysql]
    host=127.0.0.1
    user=zabbix
    password=密码
    socket=/var/lib/mysql/mysqld.sock
    [mysqladmin]
    host=127.0.0.1
    user=zabbix
    password=密码
    socket=/var/lib/mysql/mysqld.sock
   

   一定要注意各项信息是否符合本机，检查mysqld.sock文件。在配置过程中，host后边添加了多余的空格导致zabbix_agent访问数据库失败。

4. 修改zabbix配置

   修改/etc/zabbix/zabbix_agentd.d/userparameter_mysql.conf文件，将所有的HOME指向的文件路径指向到上一步保存的.my.cnf文件所在的目录。修改后的文件如下：

    # For all the following commands HOME should be set to the directory that has .my.cnf file with password information.
   
    # Flexible parameter to grab global variables. On the frontend side, use keys like mysql.status[Com_insert].
    # Key syntax is mysql.status[variable].
    UserParameter=mysql.status[*],echo "show global status where Variable_name='$1';" | HOME=/etc/zabbix mysql -N | awk '{print $$2}'
   
    # Flexible parameter to determine database or table size. On the frontend side, use keys like mysql.size[zabbix,history,data].
    # Key syntax is mysql.size[<database>,<table>,<type>].
    # Database may be a database name or "all". Default is "all".
    # Table may be a table name or "all". Default is "all".
    # Type may be "data", "index", "free" or "both". Both is a sum of data and index. Default is "both".
    # Database is mandatory if a table is specified. Type may be specified always.
    # Returns value in bytes.
    # 'sum' on data_length or index_length alone needed when we are getting this information for whole database instead of a single table
    UserParameter=mysql.size[*],echo "select sum($(case "$3" in both|"") echo "data_length+index_length";; data|index) echo "$3_length";; free) echo "data_free";; esac)) from information_schema.tables$([[ "$1" = "all" || ! "$1" ]] || echo " where table_schema='$1'")$([[ "$2" = "all" || ! "$2" ]] || echo "and table_name='$2'");" | HOME=/etc/zabbix mysql -N
   
    UserParameter=mysql.ping,HOME=/etc/zabbix mysqladmin ping | grep -c alive
    UserParameter=mysql.version,mysql -V
   

5. 重启zabbix agent

    service zabbix-agent restart
   

6. 参考文档

   http://www.kaijia.me/2014/01/use-zabbix-monitor-mysql-server/ http://blog.themilkyway.org/2013/11/how-to-monitor-mysql-using-the-new-zabbix-template-app-mysql/ http://jaychang.iteye.com/blog/2214996 http://os.51cto.com/art/201404/435139.htm http://magic3.blog.51cto.com/1146917/1324494