创建image中CMD如何写可以让container启动后持续运行？

来源：6-3 Docker Compose的安装和基本使用

Louis0o

2019-04-21

FROM centos:latest
# part 1
# LABAL 
# ENV 
COPY . /var/www/demo
WORKDIR /var/www/demo

# part 2 install dependency of httpd and python
RUN yum upgrade -y
RUN yum install -y httpd httpd-devel 
RUN yum install -y mod_wsgi 
RUN yum install -y epel-release
RUN yum install -y python-pip
RUN yum clean all
RUN pip --version
RUN pip install --upgrade pip
RUN pip install -r requirements.txt

# part 3 modify settings in httpd.conf
WORKDIR /etc/httpd/conf
RUN sed -i '/^DocumentRoot/c DocumentRoot "/var/www/demo"' httpd.conf
RUN sed -i '/^# Further relax access to the/{n;s/html/demo/;}' httpd.conf
RUN sed -i '$a ServerName localhost:80' httpd.conf
RUN sed -i '$a WSGIScriptAlias / /var/www/demo/demo/wsgi.py' httpd.conf
RUN sed -i '$a Alias /static /var/www/demo275/static' httpd.conf
RUN sed -i '$a Alias /media /var/www/demo275/media' httpd.conf
# more settings should be set.

EXPOSE 80
CMD ["httpd"]

老师，我在将自己的django APP通过docker-compose up -d部署的时候。这个django APP对应的service总是起来一下就立马退出了。

经过一番测试和研究，我觉得应该是Dockerfile中的CMD没有写好，或者是docker-compose.yml文件中的command: xx 没有指定好。

那么，我应该怎样去修改，才能使得docker-compose up -d后，django APP对应的service就一直运行呢？是改Dockerfile好，还是改docker-compose.yml文件好呢？

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