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

@wajdijurry, 4 years ago file :) where did you find it?

condition in depends_on is no longer supported from v3.0 and above.

Oh, god, why?

Oh, god, why?

The support was added back again

Oh, god, why?

The support was added back again

woohoo!

@Luc45 lu @fdorantesm hi, does this ensure that(test: "/etc/init.d/mysql status") the database has been created?
I found another way
test: ["CMD", "mysql" ,"-h", "mysql", "-P", "3306", "-u", "root", "-e", "SELECT 1", "cache"]
This execution failed:

Access denied for user 'root'@'172.25.0.3' (using password: NO)

---

I tried to add a password
["CMD", "mysql" ,"-h", "mysql", "-P", "3306", "-u", "root", "-p", "111111", "-e", "SELECT 1", "cache"]
This execution failed:

^[container for service "mysql" is unhealthy

I don't know how to write it

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