Prometheus监控之Mysql篇

mysqld_exporter的安装

1、mysqld_exporter的安装

官网地址：https://prometheus.io/download

[root@localhost ~]# wget https://github.com/prometheus/mysqld_exporter/releases/download/v0.12.1/mysqld_exporter-0.12.1.linux-amd64.tar.gz

2、解压mysqld_exporter

[root@localhost ~]# tar xf mysqld_exporter-0.12.1.linux-amd64.tar.gz

[root@localhost ~]# mv mysqld_exporter-0.12.1.linux-amd64 /usr/local/mysqld_exporter

3、Mysql授权（因为Mysql在本机）

mysql> grant all on *.* to admin@'localhost' identified by '123456';

mysql> flush privileges;

4、创建mysql.cnf配置文件

[root@localhost ~]# cd /usr/local/mysqld_exporter

[root@localhost mysqld_exporter]# vim mysql.cnf

1. [client]
2. user=admin
3. password=123456

5、创建Mysqld_exporter启动脚本

[root@localhost ~]# vim /usr/lib/systemd/system/mysqld_exporter.service

1. [Unit]
2. Description=mysqld_exporter
3. Documentation=https://prometheus.io
4. Wants=network-online.target
5. After=network.target
6. [Service]
7. Type=simple
8. User=root
9. ExecStart=/usr/local/mysqld_exporter/mysqld_exporter --config.my-cnf=/usr/local/mysqld_exporter/mysql.cnf
10. Restart=on-failure
11. [Install]
12. WantedBy=multi-user.target

6、启动mysqld_exporter

[root@localhost mysqld_exporter]# systemctl daemon-reload

[root@localhost mysqld_exporter]# systemctl start mysqld_exporter

7、浏览器访问本机IP:9104/metrics可以看到mysql的指标

8、修改prometheus配置文件，scrape_configs下面添加

[root@localhost mysqld_exporter]# vim /usr/local/prometheus/prometheus.yml

1. - job_name: 'mysql'
2. static_configs:
3. - targets: ['localhost:9104']

9、重启Prometheus服务

[root@localhost mysqld_exporter]# systemctl restart prometheus

10、在Prometheus界面可以看到mysql相关指标

11、查看Targets

二、Grafana配置

1、Granfana 导入Mysql 监控图表

推荐图标ID：https://grafana.com/dashboards/7362

2、输入图标ID

3、输入导入图标ID等待3秒弹出如下，修改后导入即可

4、监控展示

至此，Prometheus监控Mysql完毕。