透過 Docker Compose 建立 Prometheus、Node-Exporter

Devops > Prometheus Prometheus

發布時間 : 2022-06-14 22:41

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前言
建立資料夾、yml檔
建立完成後 Run docker-compose

前言

本篇記錄以 docker-compose 方式建立 prometheus、node-exporter 服務

node-exporter 用以蒐集伺服器資訊，並透過 API 提供 Metric 資訊
prometheus 則可透過 node-exporter 蒐集的 Metric 資訊，將資訊整合起來當作資料來源

建立資料夾、yml檔

預期的資料夾配置如下

prometheus-docker-compose.yml
prometheus/
├── config
│ └── prometheus.yml
└── data

建立 prometheus-docker-compose.yml

vi prometheus-docker-compose.yml

version: '3.8'

networks:
  monitoring:
    driver: bridge
    
volumes:
  prometheus_data: {}

services:
  node-exporter:
    image: prom/node-exporter:latest
    container_name: node-exporter
    restart: unless-stopped
    volumes:
      - /proc:/host/proc:ro
      - /sys:/host/sys:ro
      - /:/rootfs:ro
    command:
      - '--path.procfs=/host/proc'
      - '--path.rootfs=/rootfs'
      - '--path.sysfs=/host/sys'
      - '--collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)'
    ports:
      - 9100:9100
    networks:
      - monitoring

  prometheus:
    image: prom/prometheus:latest
    container_name: prometheus
    restart: unless-stopped
    volumes:
      - ./prometheus/config:/etc/prometheus
      - ./prometheus/data:/prometheus
    command:
      - '--config.file=/etc/prometheus/prometheus.yml'
      - '--storage.tsdb.path=/prometheus'
      - '--web.console.libraries=/etc/prometheus/console_libraries'
      - '--web.console.templates=/etc/prometheus/consoles'
      - '--web.enable-lifecycle'
    ports:
      - 9090:9090
    networks:
      - monitoring

建立資料夾

mkdir prometheus
mkdir prometheus/config
mkdir prometheus/data

# 權限設定
chown -R nobody:nogroup prometheus/data

建立 prometheus/config/prometheus.yml

vi prometheus/config/prometheus.yml

global:
  scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

# Alertmanager configuration
alerting:
  alertmanagers:
    - static_configs:
        - targets:
          # - alertmanager:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first_rules.yml"
  # - "second_rules.yml"

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
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"]

  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: "node"
    
    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.

    static_configs:
      - targets: ["node-exporter:9100"]

建立完成後 Run docker-compose

docker-compose -f prometheus-docker-compose.yml up -d

查看一下是否建立成功

docker-compose -f prometheus-docker-compose.yml ps

# 輸出
    Name                   Command               State                    Ports                  
-------------------------------------------------------------------------------------------------
node-exporter   /bin/node_exporter --path. ...   Up      0.0.0.0:9100->9100/tcp,:::9100->9100/tcp
prometheus      /bin/prometheus --config.f ...   Up      0.0.0.0:9090->9090/tcp,:::9090->9090/tcp

查看一下 node-export 的 Metrics API 是否正常

curl http://localhost:9100/metrics

# 輸出
# HELP go_gc_duration_seconds A summary of the pause duration of garbage collection cycles.
# TYPE go_gc_duration_seconds summary
go_gc_duration_seconds{quantile="0"} 5.4387e-05
go_gc_duration_seconds{quantile="0.25"} 9.7283e-05
go_gc_duration_seconds{quantile="0.5"} 0.000119694
go_gc_duration_seconds{quantile="0.75"} 0.000192691
go_gc_duration_seconds{quantile="1"} 0.000771569
go_gc_duration_seconds_sum 0.003983712
go_gc_duration_seconds_count 23
... 太多資料省略 ...

查看一下 prometheus UI 確認 target 狀態
http://$IP:9090/targets

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