zabbix自动发现mysql端口并监控

一、需求：

因为我们是游戏业务，要用到mysql，一个服务器上面跑多个mysql实例也是很正常。如果单独手动一台台修改agent.conf，添加web监控，太费时费力。所以就想的要用zabbix 的自动发现来监控

二、配置Agent

1.编写自动发现端口脚本

[root@tiejiang ~]# cat /etc/zabbix/alertscripts/zabbix_discovery_mysql.sh 
#!/bin/bash
mysql() {
            port=($(sudo netstat -tpln | awk -F "[ :]+" '/[m]ysql/' | awk -F: '{print $4}'))
            printf '{/n'
            printf '/t"data":[/n'
               for key in ${!port[@]}
                   do
                       if [[ "${#port[@]}" -gt 1 && "${key}" -ne "$((${#port[@]}-1))" ]];then
              socket=`ps aux|grep ${port[${key}]}|grep -v grep|awk -F '=' '{print $10}'|cut -d ' ' -f 1`
                          printf '/t {/n'
                          printf "/t/t/t/"{#MYSQLPORT}/":/"${port[${key}]}/"},/n"
                     else [[ "${key}" -eq "((${#port[@]}-1))" ]]
              socket=`ps aux|grep ${port[${key}]}|grep -v grep|awk -F '=' '{print $10}'|cut -d ' ' -f 1`
                          printf '/t {/n'
                          printf "/t/t/t/"{#MYSQLPORT}/":/"${port[${key}]}/"}/n"
                       fi
               done
                          printf '/t ]/n'
                          printf '}/n'
}
$1

2.赋权

赋执行权限 chmod 755  /etc/zabbix/alertscripts/zabbix_discovery_mysql.sh 
修改属组 chown  zabbix.zabbix /etc/zabbix/alertscripts/zabbix_discovery_mysql.sh

3.测试脚本效果

[root@tiejiang ~]# /etc/zabbix/alertscripts/zabbix_discovery_mysql.sh  mysql
{
        "data":[
         {
                        "{#MYSQLPORT}":"3306"}
         ]
}

4.配置agent.conf

[root@tiejiang ~]# cat /etc/zabbix/zabbix_agentd.conf | grep Include
### Option: Include
# Include=
# Include=/usr/local/etc/zabbix_agentd.userparams.conf
# Include=/usr/local/etc/zabbix_agentd.conf.d/
Include=/etc/zabbix/zabbix_agentd.conf.d/*.conf

[root@tiejiang zabbix_agentd.conf.d]# cat check_mysql.conf 
UserParameter=mysql.discovery[*],/etc/zabbix/alertscripts/zabbix_discovery_mysql.sh  $1
UserParameter=mysql_stats[*],/usr/bin/mysql --defaults-file=/home/zabbix/.my.cnf -P $1  -e "show global status"|grep "/<$2/>"|cut  -f2

5.sudo权限

#Defaults    requiretty
Defaults:zabbix    !requiretty
zabbix  ALL=(root)      NOPASSWD:/bin/netstat,/usr/bin/mysql

6.创建zabbix查询mysql用户

GRANT PROCESS ON *.* TO 'zabbix'@'localhost' identified BY 'zabbix';
Flush privileges;

注意：Warning: Using a password on the command line interface can be insecure.

因为mysql5.6不能使用明文密码登录，所以这里要创建一个文件用来指定用户名密码

7.创建mysql.cnf文件

[root@tiejiang zabbix]# cat /home/zabbix/.my.cnf 
[client]
user=zabbix
password=zabbix
host=localhost

chown zabbix.zabbix /home/zabbix/.my.cnf
chmod 600  /home/zabbix/.my.cnf

8.重启agent服务

service zabbix_agentd restart

9、测试

[root@tiejiang alertscripts]# /usr/local/zabbix/bin/zabbix_get  -s 127.0.0.1 -k mysql_stats[3306,Uptime]
3862
[root@tiejiang alertscripts]# /usr/local/zabbix/bin/zabbix_get -s 127.0.0.1 -k mysql.discovery[mysql] { "data":[ { "{#MYSQLPORT}":"3306"} ] }