version: '3'

services:
  # Prometheus is a monitoring and time-series database
  prometheus:
    image: prom/prometheus:v2.5.0
    restart: on-failure
    command: --config.file=/etc/prometheus/config/prometheus.yml
    volumes:
      - ./config/prometheus/:/etc/prometheus/config/
    ports:
      - 9090:9090

  # Alertmanager is the component responsible for de-duplicating and sending
  # alerts via different backends (i.e. PagerDuty, Slack, etc)
  alertmanager:
    image: prom/alertmanager:v0.15.3
    restart: on-failure
    ports:
      - 9093:9093

  # Grafana can be used for creating nice dashboards based on the data stored
  # in Prometheus
  grafana:
    image: grafana/grafana:5.3.4
    restart: on-failure
    environment:
      GF_LOG_LEVEL: debug
    volumes:
      - ./config/grafana/datasource.yml:/etc/grafana/provisioning/datasources/prometheus.yml
      - ./config/grafana/dashboard-providers.yml:/etc/grafana/provisioning/dashboards/dashboard-providers.yml
      - ./config/grafana/dashboards/:/var/lib/grafana/dashboards/
    ports:
      - 3000:3000
    depends_on:
      - prometheus

  # Our sample Node.js application
  sample-app:
    build:
      context: ./sample-app
    volumes:
      - ./sample-app/index.js:/usr/src/app/index.js
    ports:
      - 4000:4000