[英]Starting Postgres in Docker Container
For testing, I'm trying to setup Postgres inside of a docker container so that our python app can run it's test suite against it. 为了测试,我试图在docker容器中设置Postgres,以便我们的python应用程序可以运行它的测试套件。
Here's my Dockerfile: 这是我的Dockerfile:
# Set the base image to Ubuntu
FROM ubuntu:16.04
# Update the default application repository sources list
RUN apt-get update && apt-get install -y \
python2.7 \
python-pip \
python-dev \
build-essential \
libpq-dev \
libsasl2-dev \
libffi-dev \
postgresql
USER postgres
RUN /etc/init.d/postgresql start && \
psql -c "CREATE USER circle WITH SUPERUSER PASSWORD 'circle';" && \
createdb -O darwin circle_test
USER root
RUN service postgresql stop && service postgresql start
# Upgrade pip
RUN pip install --upgrade pip
COPY . /app
WORKDIR /app
RUN pip install -r requirements.txt
EXPOSE 5000
# Set the container entrypoint
ENTRYPOINT ["gunicorn", "--config", "/app/config/gunicorn.py", "--access-logfile", "-", "--error-logfile", "-", "app:app"]
When I run: 当我跑:
docker run --entrypoint python darwin:latest -m unittest discover -v -s test
I'm getting: 我越来越:
could not connect to server: Connection refused
Is the server running on host "localhost" (127.0.0.1) and accepting
TCP/IP connections on port 5432?
The only way I can get it to work is if I ssh into the container, restart postgres and run the test suite directly. 我可以让它工作的唯一方法是,如果我进入容器,重新启动postgres并直接运行测试套件。
Is there something I'm missing here? 这里有什么我想念的吗?
In a Dockerfile you have 在Dockerfile中你有
a configuration phase, the RUN directive (and some others) 配置阶段,RUN指令(和其他一些)
the process(es) you start, that you put in either 你开始的过程,你输入的过程
CMD
or 要么
ENTRYPOINT
see the docs 看文档
https://docs.docker.com/engine/reference/builder/#cmd https://docs.docker.com/engine/reference/builder/#cmd
and 和
https://docs.docker.com/engine/reference/builder/#entrypoint https://docs.docker.com/engine/reference/builder/#entrypoint
when a container has completed what it has to do in this start phase, it dies. 当一个容器完成了它在这个开始阶段必须做的事情时,它就会死掉。
This is why the reference Dockerfile for PostgreSQL, at 这就是PostgreSQL的引用Dockerfile的原因
https://github.com/docker-library/postgres/blob/3d4e5e9f64124b72aa80f80e2635aff0545988c6/9.6/Dockerfile https://github.com/docker-library/postgres/blob/3d4e5e9f64124b72aa80f80e2635aff0545988c6/9.6/Dockerfile
ends with 以。。结束
CMD ["postgres"]
if you want to start several processes, see supervisord or such tool (s6, daemontools...) 如果你想启动几个进程,请参阅supervisord或此类工具(s6,daemontools ......)
https://docs.docker.com/engine/admin/using_supervisord/ https://docs.docker.com/engine/admin/using_supervisord/
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