Prometheus客户端mysql监控mysqld_exporter

Posted 2021-10-09 gsls200808

上一篇文章讲了监控docker，这一篇讲监控mysql

用到的exporter是官方的：GitHub - prometheus/mysqld_exporter: Exporter for MySQL server metrics

默认端口9104，监控通过添加用户查询sql实现，无需重启mysql服务端

1.下载安装mysqld_exporter

下载安装mysql_exporter

wget https://github.com/prometheus/mysqld_exporter/releases/download/v0.13.0/mysqld_exporter-0.13.0.linux-amd64.tar.gz
tar -C /usr/local -zxvf  mysqld_exporter-0.13.0.linux-amd64.tar.gz

建立软链接
 

ln -sv /usr/local/mysqld_exporter-0.13.0.linux-amd64/ /usr/local/mysqld_exporter

执行sql

#exporter'@'localhost'用户
CREATE USER 'exporter'@'localhost' IDENTIFIED BY '000000' WITH MAX_USER_CONNECTIONS 3;
GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO 'exporter'@'localhost';
GRANT SELECT ON performance_schema.* TO 'exporter'@'localhost';  
FLUSH PRIVILEGES;

#'exporter'@'%'用户
CREATE USER 'exporter'@'%' IDENTIFIED BY '000000' WITH MAX_USER_CONNECTIONS 3;
GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO 'exporter'@'%';
GRANT SELECT ON performance_schema.* TO 'exporter'@'%';  
FLUSH PRIVILEGES;

这里有两个用户的命令，默认exporter'@'localhost'看有无结果，若没有用exporter'@'%'

在mysqld_exporter创建mysql配置文件，运行时读配置文件登录mysql
 

vi /usr/local/mysqld_exporter/.my.cnf

内容如下

[client]
user=exporter
password=000000

设置开机自启服务

vi /usr/lib/systemd/system/mysqld_exporter.service

内容如下

[Unit]
Description=https://prometheus.io

[Service]
Restart=on-failure
ExecStart=/usr/local/mysqld_exporter/mysqld_exporter --config.my-cnf=/usr/local/mysqld_exporter/.my.cnf

[Install]
WantedBy=multi-user.target

启动和开机自启

systemctl daemon-reload
systemctl start mysqld_exporter.service & systemctl enable mysqld_exporter

防火墙放行9104端口

firewall-cmd --zone=public  --add-port=9104/tcp  --permanent
firewall-cmd --reload

metrics访问地址
http://10.24.11.202:9104/metrics
ip改成自己的ip

  2.服务端prometheus.yml添加节点信息

编辑

vi /usr/local/prometheus/prometheus.yml

添加

  - job_name: "202mysql"
    static_configs:
      - targets: ["10.24.11.202:9104"]
        labels:
          service: mysql-service

名称自己起，targets需要配置客户端的ip端口号

重启服务端

systemctl restart prometheus

查看target

3.Grafana添加仪表

然后导入仪表盘插件，先从官网找模板

这里推荐复制id 7362(MySQL Overview)

导入过程跟上一篇一样，仪表如图