docker-stack.yml

version: '3.9'
# a stack-file version of this for running in Swarm services
# Swarm still needs the 3.x version for stacks

services:
  node:
    # reminder, don't use latest tag in production, use versions created by CI/CD
    image: bretfisher/node-docker-good-defaults:latest
    ports:
      - "80:3000"
    environment:
      - NODE_ENV=production
      - MONGO_USERNAME_FILE=/run/secrets/mongo_root
      - MONGO_PASSWORD_FILE=/run/secrets/mongo_root_password
      - MONGO_HOSTNAME=mongo
      - MONGO_PORT=27017
      - MONGO_DATABASE_NAME=example-database
    secrets:
      - mongo_root
      - mongo_root_password
    deploy:
      replicas: 2

  mongo:
    image: mongo
    ports:
      - "27017:27017"
    environment:
      - MONGO_INITDB_ROOT_USERNAME_FILE=/run/secrets/mongo_root
      - MONGO_INITDB_ROOT_PASSWORD_FILE=/run/secrets/mongo_root_password
      - MONGO_INITDB_DATABASE=example-database
    secrets:
      - mongo_root
      - mongo_root_password
    healthcheck:
      test: "[ `echo 'db.runCommand(\"ping\").ok' | mongo localhost/example-database --quiet` ] && echo 0 || echo 1"
      interval: 5s
      timeout: 5s
      retries: 3

secrets:
  mongo_root:
    external: true
  mongo_root_password:
    external: true