Ошибка соединения с MySQL в django во время работы docker-compose

Question

Dockerfile

FROM python:3.6
ENV PYTHONUNBUFFERED 1
WORKDIR /usr/src/govtcareer_api

COPY ./ /usr/src/govtcareer_api

RUN pip install -r requirements.txt

CMD ["/bin/bash"]

docker-compose.yml

version: "3"

services:
  govtcareer_api:
    container_name: govtcareer
    build: .
    command: "bash -c 'python manage.py migrate --no-input && python manage.py runserver 0.0.0.0:8000'"
    working_dir: /usr/src/govtcareer_api
    ports:
      - "8000:8000"
    volumes:
      - ./:/usr/src/govtcareer_api
    links:
      - mysql

  #db
  mysql:
    image: mysql
    restart: always
    ports:
      - "3306:3306"
    environment:
      MYSQL_DATABASE: "freejobalert"
      MYSQL_USER: "root"
      MYSQL_PASSWORD: "Thinkonce"
      MYSQL_ROOT_PASSWORD: "Thinkonce"
      MYSQL_HOST: "mysql"
      MYSQL_PORT: "3306"
      MYSQL_ALLOW_EMPTY_PASSWORD: "yes"

django-база данных:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'freejobalert',
        'USER': 'root',
        'PASSWORD': 'Thinkonce',
        'HOST': 'mysql',
        'PORT': '3306',
    }
}

ошибки:

    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 379, in check
    govtcareer        |     include_deployment_checks=include_deployment_checks,
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 59, in _run_checks
    govtcareer        |     issues = run_checks(tags=[Tags.database])
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/core/checks/registry.py", line 71, in run_checks
    govtcareer        |     new_errors = check(app_configs=app_configs)
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/core/checks/database.py", line 10, in check_database_backends
    govtcareer        |     issues.extend(conn.validation.check(**kwargs))
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/backends/mysql/validation.py", line 9, in check
    govtcareer        |     issues.extend(self._check_sql_mode(**kwargs))
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/backends/mysql/validation.py", line 13, in _check_sql_mode
    govtcareer        |     with self.connection.cursor() as cursor:
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 255, in cursor
    govtcareer        |     return self._cursor()
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 232, in _cursor
    govtcareer        |     self.ensure_connection()
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
    govtcareer        |     self.connect()
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
    govtcareer        |     raise dj_exc_value.with_traceback(traceback) from exc_value
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 216, in ensure_connection
    govtcareer        |     self.connect()
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 194, in connect
    govtcareer        |     self.connection = self.get_new_connection(conn_params)
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 227, in get_new_connection
    govtcareer        |     return Database.connect(**conn_params)
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/MySQLdb/__init__.py", line 85, in Connect
    govtcareer        |     return Connection(*args, **kwargs)
    govtcareer        |   File "/usr/local/lib/python3.6/site-packages/MySQLdb/connections.py", line 204, in __init__
    govtcareer        |     super(Connection, self).__init__(*args, **kwargs2)
    govtcareer        | django.db.utils.OperationalError: (2003, 'Can\'t connect to MySQL server on \'mysql\' (111 "Connection refused")')
    govtcareer exited with code 1
    mysql_1_31828138be40 | 2018-12-02T10:56:56.762071Z 5 [Warning] [MY-010453] [Server] root@localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.
    mysql_1_31828138be40 | 2018-12-02T10:57:05.849324Z 5 [Warning] [MY-010315] [Server] 'user' entry 'mysql.infoschema@localhost' ignored in --skip-name-resolve mode.

Я пытаюсь соединить django с mysql внутри docker, используя docker-команды.Вот коды и команды.

Я получаю некоторую ошибку соединения при запуске команды "sudo docker-compose up"

Но я могу получить доступ к базе данных mysql внутри докера.

Пожалуйста, взгляните на это