[英]Django app server hangs / won't start in Docker Compose
I am trying to launch a straightforward Django app server in Docker Compose, paired with a Postgres container. 我正在尝试在Docker Compose中启动一个简单的Django应用服务器,并与Postgres容器配对。 It goes through as I would expect, launching the entrypoint script, but it never seems to actually run the Django app server (which should be the last step, and remain running).
它按照我的预期进行,启动了入口点脚本,但似乎从未真正运行Django应用服务器(这应该是最后一步,并保持运行状态)。
I know it runs the entrypoint script, because the migrate step is run. 我知道它运行入口点脚本,因为运行了迁移步骤。 The app server never outputs any of the expected output, and port 8000 never responds.
应用程序服务器从不输出任何预期的输出,并且端口8000从不响应。
I am using Docker for Mac (stable), if it matters. 如果有问题,我正在使用Mac的Docker(稳定)。
Dockerfile for my Django app container: 我的Django应用容器的Dockerfile:
FROM ubuntu:16.04
COPY my_app /my_app
RUN apt-get update \
&& apt-get install -y python3 python3-psycopg2 python3-pip
RUN apt-get install -y nodejs npm
WORKDIR /my_app
RUN pip3 install -r requirements.txt
RUN npm install bower
RUN python3 manage.py bower install
RUN python3 manage.py collectstatic --no-input
EXPOSE 8000
COPY entrypoint.sh /
RUN chmod 755 /entrypoint.sh
CMD python3 manage.py runserver 0.0.0.0:8000
ENTRYPOINT ["/entrypoint.sh"]
Django entrypoint script: Django入口点脚本:
#!/bin/sh
# Allow database container to start up or recover from a crash
sleep 10
cd /my_app
# Run any pending migrations
python3 manage.py migrate
exec $@
docker-compose.yml: docker-compose.yml:
version: '2'
services:
db:
image: postgres:9.6
volumes:
- ./db/pgdata:/pgdata
environment:
- POSTGRES_USER=my_user
- POSTGRES_PASSWORD=my_password
- PGDATA=/pgdata
- POSTGRES_DB=my_database
appserver:
image: my-image
command: python3 manage.py runserver 0.0.0.0:8000
ports:
- '8000:8000'
environment:
- POSTGRES_USER=my_user
- POSTGRES_PASSWORD=my_password
- POSTGRES_DB=my_database
links:
- db
depends_on:
- db
Use the exec form for CMD
in your Dockerfile 在Dockerfile中使用
CMD
的exec表单
CMD ["python3", "manage.py", "runserver", "0.0.0.0:8000"]
The entrypoint.sh
scripts exec
is currently trying to run: 该
entrypoint.sh
脚本exec
目前正试图运行:
/bin/sh -c python3 manage.py runserver 0.0.0.0:8000
Which doesn't seem to work, I think it's just running python3
. 这似乎不起作用,我认为它只是运行
python3
。
You should quote the positional parameters variable so the shell maintains each parameter, even if there are spaces. 您应该引用位置参数变量,以便即使有空格,外壳程序也可以维护每个参数。
exec "$@"
But it's best not to have sh
in between docker and your app, so always use the exec form for a CMD
. 但最好不要有
sh
在码头工人和您的应用程序之间,所以总是使用exec形式的CMD
。
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