docker-compose.yml

version: '3.9'

services:
  postgres:
    image: postgres:15-alpine
    environment:
      - POSTGRES_PASSWORD=postgres
      - POSTGRES_USER=postgres
      - POSTGRES_DB=testdb
      - POSTGRES_INITDB_ARGS=--auth-host=md5
      - PGDATA=/var/lib/postgresql/data/pgdata
    ports:
      - "5432:5432"
    volumes:
      - postgres:/var/lib/postgresql/data

  backend:
    build:
      context: .
      dockerfile: Dockerfile
      target: production
    container_name: django_backend
    restart: always
    ports: # TODO unsafe open ports without reverse proxy like nginx
      - "80:8000"
    environment:
      - CELERY_BROKER_URL=redis://redis:6379/0
      - REDIS_URL=redis://redis:6379/0
      - DEBUG=True
      - DATABASE_URL=postgres://postgres:postgres@postgres/postgres
      - SECRET_KEY=wzrjq9#%_*fx^@0e7vrw64!ua1*d#_o6df7bvwow)jbwor6n7!
    healthcheck:
      test: curl --fail http://localhost:8000 || exit 1
      interval: 5s
      retries: 5
      timeout: 10s
    volumes:
      - ".:/app"
    depends_on:
      postgres:
        condition: service_started
      prometheus:
        condition: service_started
      redis:
        condition: service_healthy
    deploy:
      resources:
        limits:
          cpus: '1.5'
          memory: 750M

  redis:
    image: redis:7.0.8-alpine
    ports:
      - "6379:6379"
    healthcheck:
      test: [ "CMD-SHELL", "redis-cli ping | grep PONG" ]
      interval: 1s
      timeout: 3s
      retries: 5

  prometheus:
    image: prom/prometheus:latest
    restart: always
    volumes:
      - ./prometheus-conf.yaml:/etc/prometheus/prometheus.yml:ro
      - ./prometheus-rules.yaml:/etc/prometheus/django_rules.yml:ro
    command:
      - --config.file=/etc/prometheus/prometheus.yml
    ports:
      - "9090:9090"

  grafana:
    image: grafana/grafana:9.3.6
    container_name: grafana
    ports:
      - "3000:3000"
    volumes:
      - grafana-storage:/var/lib/grafana

  postgres-exporter:
    image: prometheuscommunity/postgres-exporter:latest
    restart: always
    environment:
      - DATA_SOURCE_NAME=postgresql://postgres:postgres@postgres:5432/testdb?sslmode=disable
    ports:
      - "9187:9187"
    depends_on:
      postgres:
        condition: service_started
    links:
      - postgres
      - prometheus


volumes:
  postgres:
  grafana-storage: