Can not access mysql docker

You can pass an extra environment variable when starting the MySQL container MYSQL_ROOT_HOST=<ip> this will create a root user with permission to login from given IP address. In case where you want to allow login from any IP you can specify MYSQL_ROOT_HOST=%.

This will work only for a newly created containers.

When spinning new container:

docker run --name some-mysql -e MYSQL_ROOT_HOST=% -e MYSQL_ROOT_PASSWORD=my-secret-pw -d mysql:latest

In compose file it would be:

version: '2'
services:

  ### Mysql container
  mysql:
    image: mysql:latest
    ports:
      - "3306:3306"
    volumes:
      - /var/lib/mysql:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: test_db
      MYSQL_USER: test
      MYSQL_PASSWORD: test_pass
      MYSQL_ROOT_HOST: '%'  # needs to be enclosed with quotes

This way it worked for me:

MYSQL_ROOT_HOST: '%'

In my case. I deleted the volumes configuration and it worked.