Observability Stack Installation Guide ⚙️

Step-by-step installation guide for setting up Prometheus, Grafana, Node Exporter, and Loki using Docker Compose.

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1. Complete Observability Stack (docker-compose.yml)

Create a docker-compose.yml file:

version: '3.8'

networks:
  monitoring:
    driver: bridge

volumes:
  prometheus_data:
  grafana_data:

services:
  prometheus:
    image: prom/prometheus:v2.45.0
    container_name: prometheus
    restart: unless-stopped
    ports:
      - "9090:9090"
    volumes:
      - ./prometheus.yml:/etc/prometheus/prometheus.yml
      - prometheus_data:/prometheus
    networks:
      - monitoring

  node-exporter:
    image: prom/node-exporter:v1.6.0
    container_name: node-exporter
    restart: unless-stopped
    ports:
      - "9100:9100"
    networks:
      - monitoring

  grafana:
    image: grafana/grafana:10.0.0
    container_name: grafana
    restart: unless-stopped
    ports:
      - "3000:3000"
    volumes:
      - grafana_data:/var/lib/grafana
    networks:
      - monitoring

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2. Prometheus Scrape Configuration (prometheus.yml)

global:
  scrape_interval: 15s
  evaluation_interval: 15s

scrape_configs:
  - job_name: 'prometheus'
    static_configs:
      - targets: ['localhost:9090']

  - job_name: 'node_exporter'
    static_configs:
      - targets: ['node-exporter:9100']

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3. Starting the Stack

# Launch observability containers
docker compose up -d

# Verify container status
docker compose ps

• Prometheus Dashboard: http://localhost:9090
• Grafana UI: http://localhost:3000 (Default login: admin / admin)
• Node Exporter Metrics: http://localhost:9100/metrics