Example of using docker-compose health checks

docker-compose.yml

version: '2.1'
services:
  db:
    image: bla_bla:1234/mysql:5.6
    environment:
      - MYSQL_ROOT_PASSWORD=XXXX
      - MYSQL_DATABASE=bla_bla_dev
      - MYSQL_USER=XXXX
      - MYSQL_PASSWORD=XXXX
    ports:
      - 3306
    healthcheck:
      test: "/etc/init.d/mysql status"
      interval: 1s
      retries: 120

  app:
    build: .
    command: /bin/bash -lc "whoami"
    volumes:
      - .:/app
    environment:
      - DB_HOST=db
      - DB_NAME=bla_bla_dev
      - DB_USERNAME=XXXX
      - DB_PASSWORD=XXXX
    links:
      - db
    depends_on:
      db:
        condition: service_healthy

I tried both and got the same results. I found this - maybe this will help? I still didn't try it myself ...