三、Prometheus监控Tidb

1.下载node_exporter

https://download.pingcap.org/node_exporter-v1.3.1-linux-amd64.tar.gz

将其配置为系统服务：

vim /usr/lib/systemd/system/node_exporter.service

[Unit]
Description=node_exporter
Documentation=https://prometheus.io
[Service]
ExecStart=/data/prometheus/node_exporter/node_exporter --web.listen-address=:9101
[Install]
WantedBy=multi-user.target

启动redis_exporter:

systemctl start node_exporter

查看redis_exporter状态:

systemctl status node_exporter

修改prometheus.yml，在scrape_configs下添加

- job_name: 'overwritten-nodes'
    #honor_labels: true  # 不要覆盖 job 和实例的 label
    static_configs:
      - targets: ["192.17.0.9:9101"]
  - job_name: 'tidb'
    #honor_labels: true  # 不要覆盖 job 和实例的 label
    static_configs:
      - targets: ["192.17.0.9:10080"]

Prometheus重新加载配置文件

curl -XPOST http://127.0.0.1:9090/-/reload

grafana仪表板：

https://github.com/pingcap/tidb/blob/release-8.1/pkg/metrics/grafana/overview.json