docker-compose and mysql. What is the problem?

Question

Docker

Good afternoon.
Docker-compose up --build -d starts the container correctly. But at a connection to mysql the error falls out.

version: "3.6"
services:
  db:
    image: mysql:5.7
    restart: always
    ports:
      - "3306:3306"
    environment:
      MYSQL_ALLOW_EMPTY_PASSWORD: "yes"

At the same time, the hard rustles intensively for a couple more minutes and then the connection rises. It turns out that control is transferred to the terminal even before mysql starts. Tell me, please, how to cure it? This has not been observed before.

Answer 1

Read this https://docs.docker.com/compose/startup-order/