自动化运维zabbix监控MySQL

一.agent端（mysql客户端）：

1、先在zabbix-agent所在的机器上安装好mariadb

[root@nginx-mysqldb home]# yum install mariadb mariadb-server -y

启动mariadb,并且设置开机启动

systemctl start mariadb
systemctl enable mariadb

检查进程是否启动

[root@nginx-mysqldb yum.repos.d]# ps aux|grep mysql查看mysql的进程
mysql     22539  0.7  2.3 1756668 88704 ?       Ssl  10:48   0:00 /usr/libexec/mysqld --basedir=/usr
root      22611  0.0  0.0  12320  1076 pts/0    R+   10:49   0:00 grep --color=auto mysql
[root@nginx-mysqldb yum.repos.d]# 
[root@nginx-mysqldb yum.repos.d]# netstat -anplut|grep mysql
tcp6       0      0 :::3306                 :::*                    LISTEN      22539/mysqld        
[root@nginx-mysqldb yum.repos.d]# lsof -i:3306
COMMAND   PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
mysqld  22539 mysql   21u  IPv6 236875      0t0  TCP *:mysql (LISTEN)
[root@nginx-mysqldb yum.repos.d]# 

检查下selinu和防火墙是否关闭

[root@nginx-mysqldb yum.repos.d]# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         
[root@nginx-mysqldb yum.repos.d]# getenforce 
Permissive
[root@nginx-mysqldb yum.repos.d]#

2、在zabbix-agent机器上新建识别采集mariadb数据的参数配置文件

[root@zabbix-client-1 zabbix_agentd.d]# cat userparameter_mysql.conf 
UserParameter=mysql.status[*],/etc/zabbix/zabbix_agentd.d/mysql_status.sh $1
UserParameter=mysql.ping,/usr/bin/mysqladmin -ucali -p'cali123456' -h localhost ping 2>/dev/null | grep -c alive
UserParameter=mysql.version,/usr/bin/mysql -V
UserParameter=mysql.bytes_sent,/etc/zabbix/zabbix_agentd.d/mysql_status.sh $1

一行一个对应的参数，可以添加很多行，也就是很多参数，方便zabbix-server和zabbix-agent之间沟通

UserParameter=mysql.bytes_sent 是zabbix-server后面采集数据传递的参数 mysql.bytes_sent

/etc/zabbix/zabbix_agentd.d/mysql_status.sh $1 是接受到mysql.bytes_sent后，zabbix-agent需要执行的命令

在服务器端使用zabbix-get采集数据的参数如下：

[root@zabbix-server-1 ~]# zabbix_get -s 192.168.1.141  -k mysql.status[Uptime]
44373
[root@zabbix-server-1 ~]# 

mysql的采集数据的脚本

[root@zabbix-client-1 zabbix_agentd.d]# cat mysql_status.sh 
#!/bin/bash 
#Desc：zabbix 监控 MySQL 状态
#Date：2020-3-19
#by：cali

#主机
HOST="localhost"
#用户
USER="cali"
#密码
PASSWORD="cali123456"
#端口
PORT="3306"
#MySQL连接
CONNECTION="mysqladmin -h ${HOST} -u ${USER} -P ${PORT} -p${PASSWORD}"

if [ $# -ne "1" ];then
    echo "arg error!"
fi

case $1 in
    Uptime)
        result=`${CONNECTION} status 2>/dev/null |awk '{print $2}'`
        echo $result
        ;;
    Questions)
        result=`${CONNECTION} status 2>/dev/null |awk '{print $6}'`
        echo $result
        ;;
    Com_update)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Com_update" |awk '{print $4}'`
        echo $result
        ;;
    Slow_queries)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Slow_queries" |awk '{print $4}'`
        echo $result
        ;;
    Com_select)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Com_select" |awk '{print $4}'`
        echo $result
        ;;
    Com_rollback)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Com_rollback" |awk '{print $4}'`
        echo $result
        ;;
    Com_insert)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Com_insert" |awk '{print $4}'`
        echo $result
        ;;
    Com_delete)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Com_delete" |awk '{print $4}'`
        echo $result
        ;;
    Com_commit)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Com_commit" |awk '{print $4}'`
        echo $result
        ;;
    Bytes_sent)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Bytes_sent" |awk '{print $4}'`
        echo $result
        ;;
    Bytes_received)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Bytes_received" |awk '{print $4}'`
        echo $result
        ;;
    Com_begin)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Com_begin" |awk '{print $4}'`
        echo $result
        ;;
    Threads_connected)
        result=`${CONNECTION} extended-status 2>/dev/null |grep -w "Threads_connected" |awk '{print $4}'`
        echo $result
        ;;
        *)
        echo "Usage:$0(Uptime|Questions|Com_update|Slow_queries|Com_select|Com_rollback|Com_insert|Com_delete|Com_commit|Bytes_sent|Bytes_received|Com_begin|Threads_connected)"
        ;;
esac
[root@zabbix-client-1 zabbix_agentd.d]# 

授予可执行权限

[root@nginx-mysqldb zabbix_agentd.d]# chmod +x mysql_status.sh 

3、创建用户并授权

[root@nginx-mysqldb ~]# mysql -uroot -p
Enter password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 8
Server version: 10.3.17-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> grant all on *.* to 'cali'@'%'  identified by 'cali123456';
Query OK, 0 rows affected (0.001 sec)

MariaDB [(none)]> 

all 代表所有的权限 --》增删改查都可以
. 表示可以访问任何的库，任何库里的表
‘cali’@’%’ 用户名 %代表可以从任何地方连接过来
identified by ‘cali123456’ 设置密码为cali123456

采集数据的核心命令 mysqladmin

[root@nginx-mysqldb ~]# mysqladmin  -h localhost -ucali -p'cali123456' -P 3306 version
mysqladmin  Ver 9.1 Distrib 10.3.17-MariaDB, for Linux on x86_64
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Server version		10.3.17-MariaDB
Protocol version	10
Connection		Localhost via UNIX socket
UNIX socket		/var/lib/mysql/mysql.sock
Uptime:			27 min 50 sec

Threads: 8  Questions: 42  Slow queries: 0  Opens: 37  Flush tables: 1  Open tables: 31  Queries per second avg: 0.025
[root@nginx-mysqldb ~]# 

刷新zabbix-agent服务，因为修改了配置文件

[root@nginx-mysqldb ~]# service zabbix-agent restart
Redirecting to /bin/systemctl restart zabbix-agent.service
[root@nginx-mysqldb ~]# 

在zabbix-server这边测试，是否可以采集数据

[root@zabbix-server-1 ~]# zabbix_get -s 192.168.111.133  -k mysql.status[Uptime]
2754
[root@zabbix-server-1 ~]# 

在zabbix-server服务器上的web界面添加监控主机和相关的监控项

二.在zabbix-server上

自己创建应用集mysql-monitor，添加监控项，然后添加图形，出图
1.mysql是否正常启动
2.mysql接受的字节和发送的字节数
Bytes_sent
Bytes_received
3.有多少用户登录到mysql里
mysql.status[Threads_connected]
4.了解mysql查询的次数
Com_select

自己增加一个监控项目的流程：
1.在zabbix-agent上的userparameter_mysql.conf 里添加参数
UserParameter=mysql.processlist,/usr/bin/mysqladmin -h localhost -ucali -p’cali123456’ processlist|awk ‘{print $4}’|uniq |sort -rn|tail -n +2|wc -w
2.刷新zabbix-agent服务
3.zabbix-server上添加监控项–》出图

真正的难点就是在zabbix-agent上去采集数据的脚本或者命令–》可以使用shell脚本或者python脚本