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在Docker上使用Django时出错-“无法在'127.0.0.1'(111)上连接到MySQL服务器”)

[英]Error using Django with Docker - “Can't connect to MySQL server on '127.0.0.1' (111)”)

我正在尝试将Docker与Django一起使用,但出现错误db_1 | error: database is uninitialized and password option is not specified db_1 | You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD django.db.utils.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1' (111)") db_1 | error: database is uninitialized and password option is not specified db_1 | You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD django.db.utils.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1' (111)") db_1 | error: database is uninitialized and password option is not specified db_1 | You need to specify one of MYSQL_ROOT_PASSWORD, MYSQL_ALLOW_EMPTY_PASSWORD and MYSQL_RANDOM_ROOT_PASSWORD django.db.utils.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1' (111)") 当我在没有Docker的情况下使用我的应用程序时,它可以工作。 有什么建议么?

我的Dockerfile:

FROM python:3
 ENV PYTHONUNBUFFERED 1
 RUN mkdir /code
 WORKDIR /code
 ADD requirements.txt /code/
 RUN pip install -r requirements.txt
 ADD . /code/

我的docker-compose.yml:

version: '3'

services:
  db:
    image: mysql
  web:
    build: .
    command: python3 Project/myVirtual/backend/pri/manage.py runserver 0.0.0.0:8000
    volumes:
      - .:/code
    ports:
      - "8000:8000"
    depends_on:
      - db

我已经将docker-compose.yaml更改为:

version: '3'

services:
  db:
    image: mysql
    environment:
      MYSQL_ROOT_PASSWORD: ""
      MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
  web:
    build: .
    command: python3 virtualPRI/PRI/backend/pri/manage.py runserver 0.0.0.0:8000
    volumes:
      - .:/code
    ports:
      - "8000:8000"
    depends_on:
      - db

但此刻,进程已阻塞

db_1   | 2017-06-13T05:16:16.457122Z 0 [Note] End of list of non-natively partitioned tables

有时我还是会得到web_1 | django.db.utils.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1' (111)") web_1 | django.db.utils.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1' (111)")

manage:py

#!/usr/bin/env python
import os
import sys

if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pri.settings")
    try:
        from django.core.management import execute_from_command_line
    except ImportError:
        # The above import may fail for some other reason. Ensure that the
        # issue is really that Django is missing to avoid masking other
        # exceptions on Python 2.
        try:
            import django
        except ImportError:
            raise ImportError(
                "Couldn't import Django. Are you sure it's installed and "
                "available on your PYTHONPATH environment variable? Did you "
                "forget to activate a virtual environment?"
            )
        raise
    execute_from_command_line(sys.argv)

127.0.0.1 (111)表示MySQL拒绝您的连接请求。 我假设MySQL服务器和Django不在同一Docker实例中运行,对吗?

如果MySQL在其他地方运行,则应确保在Django的配置文件中正确配置了MySQL连接。

解决方案1:通过将MySQL的绑定地址从127.0.0.1更改为0.0.0.0 ,可以允许对MySQL的远程访问(但我不鼓励您这样做)。 并正确更新MySQL DB连接设置。

在Linux中,您可以从/etc/my.cnf注释掉这些行(位置可以不同)

skip-networking
bind-address = 127.0.0.1

有关更多详细说明,另请参见https://dev.mysql.com/doc/refman/5.5/en/can-not-connect-to-server.html

解决方案2:( 受@programerq的评论启发),您可以在主机OS或另一个Docker实例中运行MySQL。 在MySQL势必127.0.0.1默认情况下,你可以映射MySQLMachine:MySQLPortDjangoDocker:MySQLPort当你开始你的Django泊坞实例。 这样,Django仍可以连接到MySQL的127.0.0.1 ,而无需注意MySQL实际上正在其他地方运行。

之前,我在Docker集群项目中做了一些端口映射,您可以检查我运行的命令 ,或者检查Docker官方文档。

希望这些想法能有所帮助,欢呼。

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