version: "3"

services:

  mongodb:
    image: mongo:latest
    ports:
      - "27017:27017"
    command: "--smallfiles --auth"
    environment:
      - MONGO_INITDB_ROOT_USERNAME=user
      - MONGO_INITDB_ROOT_PASSWORD=password
      - MONGO_INITDB_DATABASE=admin

  rocketchat:
    image: rocket.chat:latest
    restart: always
    ports:
      - "3000:3000"
    links:
      - mongodb
    depends_on:
      - mongoUsers
    environment:
      - MONGO_URL=mongodb://userChat:passChat@mongodb:27017/rocketchat

  mongoUsers:
    image: mongo:latest
    links:
      - mongodb
    depends_on:
      - mongodb
    command: >
      /bin/bash -c "
        while ! mongo --quiet 'mongodb/admin' --eval 'db.runCommand({ping:1}).ok';
        do
          sleep 1;
        done;
        mongo --host mongodb --eval \"db.getSiblingDB('admin').auth({user:'user',pwd:'password'}); \
                                      db.getSiblingDB('rocketchat').createUser({user:'userChat', pwd:'passChat',roles:[{role:'readWrite',db:'rocketchat'}]});\";
      "