启动服务后如何保持Docker容器运行？ [英] How to Keep Docker Container Running After Starting Services?

问题描述

我看过一些教程似乎做了同样的事情我想做，但由于某些原因，我的Docker容器退出。基本上，我在Docker容器内设置了一个Web服务器和几个守护进程。我通过一个名为 run-all.sh 的bash脚本来做最后的部分，这是通过我的Docker文件中的CMD运行的。 run-all.sh 看起来像这样：

I've seen a bunch of tutorials that seem do the same thing I'm trying to do, but for some reason my Docker containers exit. Basically, I'm setting up a web-server and a few daemons inside a Docker container. I do the final parts of this through a bash script called run-all.sh that I run through CMD in my Dockerfile. run-all.sh looks like this:

service supervisor start
service nginx start

我在Dockerfile里面启动它，如下所示：

And I start it inside of my Dockerfile as follows:

CMD ["sh", "/root/credentialize_and_run.sh"]

我可以看到，当我手动运行东西（即使用-i -t / bin / bash进行映像）时，所有服务都正常启动，一切都看起来像运行图像一样正常运行，但是一旦完成了我的进程启动，它就会退出。我想让进程无限期地运行，据我所知，容器必须继续运行才能发生这种情况。然而，当我运行 docker ps -a 时，我看到：

I can see that the services all start up correctly when I run things manually (i.e. getting on to the image with -i -t /bin/bash), and everything looks like it runs correctly when I run the image, but it exits once it finishes starting up my processes. I'd like the processes to run indefinitely, and as far as I understand, the container has to keep running for this to happen. Nevertheless, when I run docker ps -a, I see:

➜  docker_test  docker ps -a
CONTAINER ID        IMAGE                            COMMAND                CREATED             STATUS                      PORTS               NAMES
c7706edc4189        some_name/some_repo:blah   "sh /root/run-all.sh   8 minutes ago       Exited (0) 8 minutes ago                        grave_jones

什么给了？为什么会退出？我知道我可以在我的最后放一个循环bash脚本，以保持它，但是什么是正确的方法来保持它退出？

What gives? Why is it exiting? I know I could just put a while loop at the end of my bash script to keep it up, but what's the right way to keep it from exiting?

推荐答案

我只是有同样的问题我发现如果您正在使用 -t 和 -d 标志运行容器，则它将继续运行。 / p>

I just had the same problem and I found out that if you are running your container with the -t and -d flag, it keeps running.

docker run -td <image>

这是标志的作用（根据 docker run --help ）：

Here is what the flags do (according to docker run --help):

-d, --detach=false         Run container in background and print container ID
-t, --tty=false            Allocate a pseudo-TTY

最重要的一个是 -t 。 -d 只需让您在后台运行容器。

The most important one is the -t flag. -d just lets you run the container in the background.

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