如何在restart =“始终”中重新启动现有的Docker容器模式？ [英] How to restart an existing Docker container in restart="always" mode?

问题描述

当您最初从图像中运行Docker容器时，您可以指定选项：

When you initially run a Docker container from an image you can specify the option:

--restart="always"

这样可以确保由于某些原因停止运行，Docker守护程序始终重新启动该容器。所以你可以这样运行一个容器：

This ensures that the container is always restarted by the Docker daemon if for some reason it stops. So you could run a container like so:

docker run --restart="always" <IMAGE>

此外，您还可以通过指定其容器ID来重新启动现有的Docker容器，即：

Also you can restart an existing Docker container by specifying its container ID, i.e.:

docker start <CONTAINER ID>

但是，我无法确定是否可以更改原来未运行的现有容器 - restart =always 选项，将其转换为将来始终重新启动。

However I can't determine if it's possible to change an existing container, that originally was not run with the --restart="always option, to convert it to always restart in future.

目前唯一的方法我可以认为这样做是将容器保存为新的映像，然后将该映像作为新的容器运行 - restart =always选项。实际上是正确的做法吗？

Currently the only way I can think to do this is to save the container as a new image and then run that image as a new container with the --restart="always" option. Would this in fact be the correct way to do this?

编辑：原来我还没有清楚的是我在想最初运行的容器已经发生变化的情况，需要持久化，所以从原始图像运行新的容器是不够的。

EDIT: What I perhaps didn't make clear enough originally is that I am thinking about the situation where there have been changes in the container since it was originally run, which need to be persisted. So just running a new container from the original image would not be sufficient.

推荐答案

好的，所以要回答我自己的问题，似乎只能用重新启动同一个容器 - restart = always ，因为这是您首次运行容器时所必须执行的操作，而不是您启动现有容器时可以使用的参数。

Ok, so to answer my own question, it seems that it's not possible just to restart the same container with --restart=always, because that's something you have to do when you run a container for the first time and not a parameter that you can use when you start an existing container.

有三种可能的解决方法：

There are three possible work-arounds to this:

1. 正如@ user2915097所说，你可以放弃原始容器（停止它，然后用 docker rm< CONTAINER ID> 删除它）以整理。然后从原始图像运行一个新的容器，这次指定了 -restart = always 选项。



2. 如果没有卷被使用，所以更改是容器的内部，您需要将容器提交到一个新的映像，然后从该映像运行一个新的容器。

1. As @user2915097 stated, you can abandon the original container (stopping it and then deleting it with docker rm <CONTAINER ID>to tidy up). Then just run a new container from the original image specifying the -restart=always option this time.

2. If no volumes were used, so the changes are internal to the container, you need to commit the container to a new image and then run a new container from that image.

docker commit< CONTAINER ID> < NEW IMAGE NAME>

docker run -d --restart = always ...< NEW IMAGE NAME>

如果使用卷，所有更改都限于卷，则可以运行第二个容器， code> - 卷 - 来自参数，而不必提交新版本的图像。即

If volumes were used and all changes are restricted to the volumes, then you can run a second container with the --volumes-from parameter without having to commit a new version of the image. i.e.

• 停靠站停止&CONTINERER 1 NAME>


• docker run -d --restart = always --volumes-from< CONTAINER 1 NAME> ...< ORIGINAL IMAGE NAME>

• docker stop <CONTAINER 1 NAME>
• docker run -d --restart=always --volumes-from <CONTAINER 1 NAME> ... <ORIGINAL IMAGE NAME>

然后删除容器1将是安全的，如这个卷不会被删除，而另一个容器继续使用它们。

It would then be safe to delete Container 1, as the volumes will not be deleted whilst another container continues to use them.

我想还有第四种可能性;如果您使用卷（和）您知道容器中没有卷的更改，则必须使用（2）和（3）的组合）。

I guess there is a fourth possibility too; if you used a volume(s) and you know that there have been changes to the container that aren't on the volume, then you'll have to use a combination of (2) and (3).

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