prometheus监控mysql

创建一个用于mysqld_exporter连接到MySQL的用户并赋予所需的权限

mysql> GRANT REPLICATION CLIENT, PROCESS ON *.* TO 'mysqld_exporter'@'localhost' identified by '000000';
mysql> GRANT SELECT ON performance_schema.* TO 'mysqld_exporter'@'localhost';
mysql> flush privileges;

创建一个用于连接MySQL的配置文件

mysqld_exporter默认会读取~/.my.cnf文件。这里是创建在mysqld_exporter的安装目录下的。

$ vim /usr/local/prom/mysqld_exporter_0110/.my.cnf

[client]
user=mysqld_exporter
password=000000

创建Systemd服务

#vim /etc/systemd/system/mysql_exporter.service
[Unit]
Description=mysql_exporter
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/prom/exporter/mysqld_exporter_0110/mysqld_exporter --config.my-cnf=/usr/local/prom/exporter/mysqld_exporter_0110/.my.cnf
Restart=on-failure
[Install]
WantedBy=multi-user.target

启动mysqld_exporter

# systemctl start mysql_exporter
# systemctl status mysql_exporter

添加prometheus相关配置

# vi prometheus280/prometheus.yml

  - job_name: 'mysql'

    static_configs:
    - targets: ['localhost:9104']
      labels:
          instance: db1

重启prometheus即可