docker-compose.yml

# version is now using "compose spec"
# v2 and v3 are now combined!
# docker-compose v1.27+ required
version: "3"

services:
  api-server:
    container_name: api-server
    build:
      context: .
    volumes:
      - ./src:/backend/src:ro
    environment:
      REDIS_DB_HOST: redis-db
      MONGO_DB_HOST: mongo-db
    depends_on:
      redis:
        condition: service_healthy
      mongo:
        condition: service_healthy
    ports:
      - ${SERVER_PORT}:${SERVER_PORT}
    networks:
      - back-tier
    # for consistent connection to the host on all platforms (Mac, Windows, and Linux)
    extra_hosts:
      - host.docker.internal:host-gateway
    restart: unless-stopped

  redis:
    container_name: redis-db
    image: redis:5.0-alpine3.10
    volumes:
      - redis-data:/data
      - ./healthchecks:/healthchecks:ro
    healthcheck:
      test: /healthchecks/redis.sh
      # check for 1 min before considered unhealthy
      interval: 3s
      retries: 20
    ports:
      - ${REDIS_DB_PORT}:${REDIS_DB_PORT}
    networks:
      - back-tier
    restart: unless-stopped # always

  mongo:
    container_name: mongo-db
    image: mongo:4.4.13
    volumes:
      - mongo-db:/data/db
      - mongo-config:/data/configdb
      - ./healthchecks:/healthchecks:ro
    healthcheck:
      test: [ "CMD", "sh", "healthchecks/mongo.sh" ]
      # check for 1 min before considered unhealthy
      interval: 3s
      retries: 20
    ports:
      - ${MONGO_DB_PORT}:${MONGO_DB_PORT}
    networks:
      - back-tier
    environment:
      MONGO_INITDB_DATABASE: ${MONGO_INITDB_DATABASE}
      MONGO_INITDB_ROOT_USERNAME: ${MONGO_INITDB_ROOT_USERNAME}
      MONGO_INITDB_ROOT_PASSWORD: ${MONGO_INITDB_ROOT_PASSWORD}
      MONGO_DB_PORT: ${MONGO_DB_PORT}
    restart: unless-stopped # always

volumes:
  # external: true -> keeps volumes when destroyed using docker-compose down -v
  mongo-db:
    name: mongo-db-volume
    external: true

  redis-data:
    name: redis-data-volume

  mongo-config:
    name: mongo-config-volume

networks:
  back-tier: