使用Docker部署时发生内部服务器错误

问题描述

我想对Web服务进行docker化，我配置了以下文件：

dockerfile

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

docker-compose.yml

version: '3'

services:
  db:
    image: MysqL
    container_name: DB_test
    environment:
      MysqL_DATABASE: 'test'
      MysqL_USER: 'user'
      MysqL_PASSWORD: 'password'
      MysqL_ROOT_PASSWORD: 'password'
    ports:
      - "3306:3306"
    volumes:
      - ./sql:/docker-entrypoint-initdb.d
  web:
    build: .
    command: gunicorn --bind 0.0.0.0:8000 manage:app
    ports:
      - "8000:8000"
    depends_on:
      - db

sql / init.sql

GRANT ALL PRIVILEGES ON test TO 'user'@'%';

FLUSH PRIVILEGES;

sqlalchemy_conf

{
    "HR_API_ID" : "api_id","HR_API_CODE" : "api_code","DB_HOST" : "0.0.0.0","DB_PORT" : "3306","DB_USERNAME" : "user","DB_PASSWORD" : "password","DB_NAME" : "test","DB_CONNECTION" : "MysqL"
}

之后，我运行：

docker-compose build
docker-compose up

当我尝试访问http://0.0.0.0:8000/时，控制台中显示的日志错误是以下错误：

sqlalchemy.exc.OperationalError: (pyMysqL.err.OperationalError) (2003,"Can't connect to MysqL server on '0.0.0.0' ([Errno 111] Connection refused)") (Background on this error at: http://sqlalche.me/e/e3q8)

在http://0.0.0.0:8000/中：

Internal Server Error

我在做什么错了？

更新：

DB_HOST" : "db"

新错误：

sqlalchemy.exc.OperationalError: (pyMysqL.err.OperationalError) (1045,"Access denied for user 'user'@'172.19.0.3' (using password: YES)") (Background on this error at: http://sqlalche.me/e/e3q8)

不确定，但是在开始时运行 init.sql 应该可以避免该错误

解决方法

根据https://docs.docker.com/compose/networking/ 您的DB_HOST应该为db，这是您的数据库服务名称，而不是0.0.0.0