Grafana 監控 Node

Node Exporter 設定

Docker compose

services:
  node_exporter:
    image: quay.io/prometheus/node-exporter:v1.9.0
    container_name: node_exporter
    command:
      - '--path.rootfs=/host'
    network_mode: host
    pid: host
    restart: unless-stopped
    ports:
      - 9100:9100
    volumes:
      - '/:/host:ro,rslave'

Linux service

1. 在 node 產生一個使用者, 用來執行服務:

   sudo useradd -s /bin/false node-exporter

2. 下載 node exporter

   export NODE_EXPORTER_VERSION=1.9.0 && wget https://github.com/prometheus/node_exporter/releases/download/v$NODE_EXPORTER_VERSION/node_exporter-$NODE_EXPORTER_VERSION.linux-$(dpkg --print-architecture).tar.gz

3. 解壓縮

   tar xvf node_exporter-$NODE_EXPORTER_VERSION.linux-$(dpkg --print-architecture).tar.gz -C /opt/node_exporter

4. 新增一個 service 執行 node-exporter - /etc/systemd/system/node_exporter.service:

   [Unit]
   Description=Node Exporter
   Wants=network-online.target
   After=network-online.target
   
   [Service]
   User=node-exporter
   Type=simple
   ExecStart=/opt/node_exporter/node_exporter --collector.systemd
   
   [Install]
   WantedBy=multi-user.target

5. 啟動服務:

   sudo systemctl daemon-reload
   sudo systemctl enable --now node_exporter
   sudo systemctl status node_exporter

6. 測試:

   curl http://<PVE_HOST>:9100/metrics

Prometheus 設定

新增 config 抓 node exporter:

scrape_configs:
- job_name: node
  static_configs:
  - targets: ['localhost:9100']

Grafana 設定

匯入 dashboard - Node Exporter Full ID: 1860