docker-compose.yml

version: '3.1'
services:
  db:
    container_name: rocketchat_mongo_db
    image: mongo:4.0
    command: "mongod --smallfiles --oplogSize 128 --replSet rs0"
    environment:
      - MONGO_PORT
    ports:
      - "${MONGO_PORT}:${MONGO_PORT}"

  mongo-init-replica:
    container_name: rocketchat_mongo_init
    image: mongo:4.0
    command: 'bash -c "for i in `seq 1 30`; do mongo db/rocketchat --eval \"rs.initiate({ _id: ''rs0'', members: [ { _id: 0, host: ''db:27017'' } ]})\" && s=$$? && break || s=$$?; echo \"Tried $$i times. Waiting 5 secs...\"; sleep 5; done; (exit $$s)"'
    depends_on:
      - db

  rocketchat:
    container_name: rocketchat_app
    image: rocketchat/rocket.chat:${RC_VERSION}
    environment:
      - RC_VERSION
      - RC_PORT
      - MONGO_URL
      - MONGO_OPLOG_URL
      - HOME
      - PORT
      - ROOT_URL
      - Accounts_AvatarStorePath
      - ADMIN_USERNAME
      - ADMIN_PASS
      - ADMIN_EMAIL
    restart: unless-stopped
    links:
      - db
    depends_on:
      - db
    ports:
      - "${RC_PORT}:${RC_PORT}"
    healthcheck:
        test: ["CMD", "curl", "-f", "http://localhost:${RC_PORT}"]
        interval: 30s
        timeout: 30s
        retries: 5