stack.yaml

# An example docker-compose file that can be used to run the stack.
# Run with: docker stack deploy -c stack.yaml stack

version: '3.9'

services:
  # Some random service that exits after 10 seconds.
  # This is used to demonstrate the stack.
  dummy:
    image: alpine
    command: /bin/sh -c "sleep 10 && echo 'I am done'"
    deploy:
      mode: replicated
      replicas: 4
      placement:
        max_replicas_per_node: 1

  prometheus:
    image: prom/prometheus:v2.32.1
    hostname: prometheus
    volumes:
      - ./prometheus.yml:/etc/prometheus/prometheus.yml
      # Mount a data volume to persist data between container restarts
      - prometheus_data:/prometheus
    command:
      - '--config.file=/etc/prometheus/prometheus.yml' # Prometheus configuration
      - '--storage.tsdb.retention.time=1y' # Keep data for 1 year
      - '--storage.tsdb.path=/prometheus' # Store data in /prometheus
    deploy:
      mode: global
      placement:
        constraints:
          - node.role == manager

  grafana:
    image: grafana/grafana:9.1.8
    volumes:
      # Mount the provisioning config to the container
      - ./grafana/provisioning:/etc/grafana/provisioning
    env_file:
      # Runtime environment variables
      - grafana/.env
    ports:
        - 3000:3000
    deploy:
      mode: global
      placement:
        constraints:
          - node.role == manager

  # The stack monitor.
  # Run `docker build -t stack-monitor .` to build the image.
  stack-monitor:
    image: stack-monitor
    environment:
      - STACK=stack
      - OUTPUT=/usr/share/nginx/html/metrics.txt
    volumes:
      # Mount a volume under the shared nginx dir to serve static files
      - stack_monitor_staticfiles:/usr/share/nginx/html/
      # Mount the Docker socket to be able to query the Docker API
      - /var/run/docker.sock:/var/run/docker.sock
    deploy:
      mode: global
      placement:
        constraints:
          - node.role == manager

  # The nginx proxy that serves the stack monitor metrics.
  stack-monitor-nginx:
    image: nginx:alpine
    hostname: stack-monitor-nginx
    volumes:
      # Mount a volume under the shared nginx dir to serve static files
      - stack_monitor_staticfiles:/usr/share/nginx/html/
    ports:
      - 80:80
    deploy:
      mode: global
      placement:
        constraints:
          - node.role == manager

volumes:
  prometheus_data:
    name: prometheus-data

  stack_monitor_staticfiles:
    name: stack_monitor_staticfiles