docker进程没有在后台运行
[英]docker process not running in background
问题描述
Im trying to create a ubuntu docker image but the process is not running in the background when I check the process. 
我试图创建一个ubuntu docker镜像，但是当我检查进程时，进程没有在后台运行。
Here are the commands 这是命令
PREMs-MacBook-Pro:Documents prem$ docker run ubuntu:16.04 grep -v '^#' /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu/ xenial main restricted
deb http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb http://archive.ubuntu.com/ubuntu/ xenial universe
deb-src http://archive.ubuntu.com/ubuntu/ xenial universe
deb http://archive.ubuntu.com/ubuntu/ xenial-updates universe
deb-src http://archive.ubuntu.com/ubuntu/ xenial-updates universe
deb http://archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ xenial-security main restricted
deb http://security.ubuntu.com/ubuntu/ xenial-security universe
deb-src http://security.ubuntu.com/ubuntu/ xenial-security universe
deb http://security.ubuntu.com/ubuntu/ xenial-security multiverse
PREMs-MacBook-Pro:Documents prem$ docker run ubuntu:16.04 grep -v '^#' /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu/ xenial main restricted
deb http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb http://archive.ubuntu.com/ubuntu/ xenial universe
deb-src http://archive.ubuntu.com/ubuntu/ xenial universe
deb http://archive.ubuntu.com/ubuntu/ xenial-updates universe
deb-src http://archive.ubuntu.com/ubuntu/ xenial-updates universe
deb http://archive.ubuntu.com/ubuntu/ xenial multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-updates multiverse
deb http://archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ xenial-security main restricted
deb http://security.ubuntu.com/ubuntu/ xenial-security universe
deb-src http://security.ubuntu.com/ubuntu/ xenial-security universe
deb http://security.ubuntu.com/ubuntu/ xenial-security multiverse
PREMs-MacBook-Pro:Documents prem$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
1 个解决方案
解决方案1
0 已采纳 2017-05-30 16:36:33
The simple answer is that your container has already exited when you check for running containers ( docker ps ) 简单的答案是，当您检查运行容器时，您的容器已经退出（ docker ps ）
As docker ps -a show all containers: those running and those not running. 作为docker ps -a显示所有容器：正在运行的容器和未运行的容器。
Your command grep does it job, then exits, so the container exits as well. 你的命令grep完成它的工作，然后退出，所以容器也会退出。
-d does not make any difference here because the container lives for a really short period of time. -d在这里没有任何区别，因为容器在很短的时间内存在。 But you can still see it's output using docker logs <container-id> 但是你仍然可以使用docker logs <container-id>看到它的输出
If you wanna inspect an image, just for fun you can: 如果你想检查图像，只是为了好玩，你可以：
docker run -it imagename bash
(Use sh if bash is not available) （如果没有bash，请使用sh ）
Bear in mind that docker run create a new container, so changes there will be only in that container. 请记住， docker run创建一个新容器，因此只会在该容器中进行更改。 Images are immutable. 图像是不可变的。
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