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Prometheus 插件mysql_exporter安装过程

2023-06-10 14:19:19 作者：日近长安远

mysql_exporter是用来收集MysQL或者Mariadb数据库相关指标的，mysql_exporter需要连接到数据库并有相关权限，这篇文章主要介绍了Prometheus插件安装(mysql_exporter),需要的朋友可以参考下

简介

mysql_exporter是用来收集MysQL或者Mariadb数据库相关指标的，mysql_exporter需要连接到数据库并有相关权限。既可以用二进制安装部署，也可以通过容器形式部署，但为了数据收集的准确性，推荐二进制安装。

一，下载安装包并解压

安装包下载地址： https://github.com/prometheus/mysqld_exporter/releases

同样物理机上下载，然后上传到服务器，本次安装使用的版本为：mysqld_exporter-0.14.0.linux-amd64

1，根据服务器情况选择安装目录，上传安装包。

mkdir /mysqld_exporter
cd /mysqld_exporter/
[root@jd-mysql mysqld_exporter]# ls
mysqld_exporter-0.14.0.linux-amd64.tar.gz
#解压
[root@jd-mysql mysqld_exporter]# tar -xvzf mysqld_exporter-0.14.0.linux-amd64.tar.gz
[root@jd-mysql mysqld_exporter]# cp mysqld_exporter-0.14.0.linux-amd64/* .
[root@jd-mysql mysqld_exporter]# rm -rf mysqld_exporter-0.14.0.linux-amd64
[root@jd-mysql mysqld_exporter]# ls
LICENSE  mysqld_exporter  mysqld_exporter-0.14.0.linux-amd64.tar.gz  NOTICE

二，创建配置文件

创建配置文件.my.cnf ，填入如下内容后保存:wq

[root@jd-mysql mysqld_exporter]# cat .my.cnf 
[client]
user = exporter
password = Jd123456
host = 192.168.1.150
port = 3306

mysql创建用户并授权，注意服务ip不要填错

[root@jd-mysql mysqld_exporter]# mysql -uroot -pJiangda123#
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.7.40-log MySQL Community Server (GPL)
Copyright (c) 2000, 2022, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
root@(none) 11:06  mysql>create user 'exporter'@'%' identified by 'Jd123456';
Query OK, 0 rows affected (1.02 sec)
root@(none) 11:07  mysql>GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO 'exporter'@'%'  WITH MAX_USER_CONNECTIONS 3;
Query OK, 0 rows affected, 1 warning (0.00 sec)
root@(none) 11:07  mysql>flush privileges;
Query OK, 0 rows affected (0.00 sec)
root@(none) 11:07  mysql>exit
Bye

三，进行系统service编写

创建mysqld_exporter.service配置文件

cd /usr/lib/systemd/system
vim mysqld_exporter.service

mysqld_exporter.service 文件填入如下内容后保存:wq

[Unit]
Description=https://prometheus.io
[Service]
Restart=on-failure
ExecStart=/mysqld_exporter/mysqld_exporter --config.my-cnf=/mysqld_exporter/.my.cnf --web.listen-address=:9104
[Install]
WantedBy=multi-user.target

查看配置文件

cat mysqld_exporter.service

刷新服务配置并启动服务

systemctl daemon-reload
systemctl start mysqld_exporter.service

查看服务运行状态

systemctl status mysqld_exporter.service

设置开机自启动

systemctl enable mysqld_exporter.service

测试服务返回

curl localhost:9104/metrics

Docker部署

在Docker部署之前，首先要确保拥有Docker环境
拉取mysqld-exporter最新镜像

docker pull prom/mysqld-exporter

创建mysql监听用户并授权，注意服务ip不要填错

CREATE USER 'exporter'@'<安装Prometheus的主机IP>' IDENTIFIED BY '<your password>';
GRANT PROCESS, REPLICATION CLIENT, SELECT ON *.* TO 'exporter'@'<安装Prometheus的主机IP>';
flush privileges;

启动容器
注意：⚠️ 若二进制章节部署后，需要执行systemctl stop mysqld_exporter.service关闭服务，否则会造成端口冲突，或者docker的端口映射改为-p 9194:9104也可。注意环境变量DATA_SOURCE_NAME的mysql帐号密码与地址无误

docker run -d  --restart=always  --name mysqld-exporter -p 9104:9104 -e DATA_SOURCE_NAME="exporter:<pass>(11x.xx.xx.7:13306)/"  prom/mysqld-exporter

测试服务返回

curl localhost:9104/metrics

对接prometheus

打开prometheus.yml添加以下内容，并执行:wq，点击回车保存

   
 - job_name: "mysql"
   static_configs:
     - targets: ["192.168.1.150:9104"]
       labels:
         instance: mysqld-exporter

执行prometheus配置刷新

curl -XPOST localhost:9090/-/reload

打开prometheus，搜索mysql，可以看到出现了很多的参数指标

打开targets，可以看到节点状态已经UP

至此mysqld-exporter插件安装完毕

用Grafana出图

[root@nfs yum.repos.d]# mkdir /grafana
[root@nfs yum.repos.d]# cd /grafana/
[root@nfs grafana]# ls
grafana-enterprise-9.1.2-1.x86_64.rpm
[root@nfs grafana]# yum install grafana-enterprise-9.1.2-1.x86_64.rpm -y

安装好后

[root@nfs grafana]# service grafana-server start
Starting grafana-server (via systemctl):                   [  确定  ]
[root@nfs grafana]# systemctl enable grafana-server  
Created symlink from /etc/systemd/system/multi-user.target.wants/grafana-server.service to /usr/lib/systemd/system/grafana-server.service.
[root@nfs grafana]# netstat -anplut|grep grafana
tcp        0      0 192.168.1.130:56948     34.120.177.193:443      ESTABLISHED 8775/grafana-server 
tcp        0      0 192.168.1.130:48842     185.199.110.133:443     ESTABLISHED 8775/grafana-server 
tcp6       0      0 :::3000                 :::*                    LISTEN      8775/grafana-server

访问http://192.168.1.130:3000/