Django与Heroku上的Postgresql – 无法将主机名“db”翻译为地址：名称或服务未知
我部署在Heroku我的项目在Docker与Angular 4前端，Django后端和Postgresql数据库。 在这个时候我的文件看起来如下所示。 当我打开应用程序，我得到错误：
2017-07-11T19:51:14.485577+00:00 app[web.1]: self.connect() 2017-07-11T19:51:14.485577+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__ 2017-07-11T19:51:14.485578+00:00 app[web.1]: six.reraise(dj_exc_type, dj_exc_value, traceback) 2017-07-11T19:51:14.485578+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise 2017-07-11T19:51:14.485578+00:00 app[web.1]: raise value.with_traceback(tb) 2017-07-11T19:51:14.485579+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection 2017-07-11T19:51:14.485579+00:00 app[web.1]: self.connect() 2017-07-11T19:51:14.485579+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/base/base.py", line 189, in connect 2017-07-11T19:51:14.485580+00:00 app[web.1]: self.connection = self.get_new_connection(conn_params) 2017-07-11T19:51:14.485580+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 176, in get_new_connection 2017-07-11T19:51:14.485580+00:00 app[web.1]: connection = Database.connect(**conn_params) 2017-07-11T19:51:14.485581+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/psycopg2/__init__.py", line 130, in connect 2017-07-11T19:51:14.485581+00:00 app[web.1]: conn = _connect(dsn, connection_factory=connection_factory, **kwasync) 2017-07-11T19:51:14.485582+00:00 app[web.1]: django.db.utils.OperationalError: could not translate host name "db" to address: Name or service not known 本地一切似乎都正常工作。 我使用docker exec -ti name /bin/bash然后python {path}\manage.py migrate并添加数据库。
Heroku上的数据库迁移可能有问题吗？
Procfile：
web: sh -c 'cd PROJECT/backend/project && gunicorn project.wsgi --log-file -'
项目树：
DockerProject ├── Dockerfile ├── Procfile ├── init.sql ├── requirements.txt ├── docker-compose.yml └── PROJECT ├── frontend └── all files └── backend └── project ├── prices ├── manage.py └── project └── all backend files
前端的Dockerfile：
# Create image based on the official Node 6 image from dockerhub FROM node:6 # Create a directory where our app will be placed RUN mkdir -p /usr/src/app # Change directory so that our commands run inside this new directory WORKDIR /usr/src/app # Copy dependency definitions COPY package.json /usr/src/app # Install dependecies RUN npm install # Get all the code needed to run the app COPY . /usr/src/app # Expose the port the app runs in EXPOSE 4200 # Serve the app CMD ["npm", "start"]
主目录的Dockerfile：
FROM python:3.6.1 ENV PYTHONUNBUFFERED 1 RUN mkdir /code WORKDIR /code ADD requirements.txt /code/ RUN pip3 install -r requirements.txt ADD . /code/
泊坞窗，compose.yml：
version: '3' services: db: image: postgres environment: POSTGRES_USER: aso POSTGRES_PASSWORD: somepass django: build: . command: python3 MainDirectory/backend/myProject/manage.py runserver 0.0.0.0:8001 volumes: - .:/code ports: - "8001:8001" depends_on: - db angular: build: MainDirectory/frontend ports: - "4200:4200" depends_on: - django
init.sql：
CREATE USER myUser; CREATE DATABASE myProject; GRANT ALL PRIVILEGES ON DATABASE myProject TO myUser;
运行Postgres的db容器只存在于本地。 它没有部署到Heroku，无论如何Heroku不支持docker-compose，所以Django容器不知道“db”是指什么。
您应该使用通过dj-database-url覆盖数据库设置的正常模式，以便在生产中您的应用程序使用环境variables中指定的Postgres插件。