监控 MySQL(三)

mysqld_exporter 安装

下载慢，请查看软件下载列表

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cd /usr/local/src/
wget https://github.com/prometheus/mysqld_exporter/releases/download/v0.12.1/mysqld_exporter-0.12.1.darwin-amd64.tar.gz
tar -zxvf mysqld_exporter-0.12.1.darwin-amd64.tar.gz -C /usr/local/
mv /usr/local/mysqld_exporter-0.12.1.darwin-amd64 /usr/local/mysqld_exporter

创建 .my.cnf 文件

host 主机地址
user mysql名称
password mysql密码

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cat > /usr/local/mysqld_exporter/.my.cnf << EOF
[client]
host=127.0.0.1 
user=root
password=root
EOF

创建 systemd 服务

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cat > /lib/systemd/system/mysqld_exporter.service << EOF
[Unit]
Description=mysqld_exporter
Documentation=https://prometheus.io/
After=network.target

[Service]
Type=simple
User=root
ExecStart=/usr/local/mysqld_exporter/mysqld_exporter --config.my-cnf=/usr/local/mysqld_exporter/.my.cnf
KillMode=process
Restart=on-failure
RestartSec=10s

[Install]
WantedBy=multi-user.target
EOF

启动

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systemctl daemon-reload
systemctl start mysqld_exporter
systemctl status mysqld_exporter

验证 metrics
显示有数据则表示已经采集到数据啦。
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curl http://localhost:9104/metrics

添加到 prometheus 数据源

添加到 scrape_configs 节点上 job_name: ‘mysqld_exporter’

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vim /usr/local/prometheus/prometheus.yml

scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.

    static_configs:
    - targets: ['localhost:9090']

  - job_name: 'mysqld_exporter' # mysqld_exporter 数据源。
    scrape_interval: 10s
    static_configs:
      - targets: ['localhost:9104']

使用 prometool 工具检查配置是否成功

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./promtool check config prometheus.yml

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Checking prometheus.yml
  SUCCESS: 0 rule files found

重启 prometheus

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systemctl daemon-reload
systemctl restart prometheus

查看 prometheus 是否添加成功
http://127.0.0.1:9090/targets

MySQL Over 图表安装

https://grafana.com/grafana/dashboards/7362

在 Grafana 导入 ID： 7362 添加图表

Import ID: 7362

查看图表

https://www.sgfoot.com/soft.html 提供软件快速下载

mysqld_exporter 安装

添加到 prometheus 数据源

MySQL Over 图表安装

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