有没有办法查看Windows版Docker上容器磁盘的使用情况？ [英] Is there a way to see container disk usage on Docker for Windows?

问题描述

我很好奇，是否有一种方法可以查看正在运行的Windows容器使用的磁盘空间，以及该容器映像中包含的层。基本上，容器自创建以来增长了多少。

I'm curious if there's a way to see how much disk space a running Windows container is using in addition to the layers that are part of the container's image. Basically, how much the container "grew" since it was created.

在Linux（或在HyperV中运行的Linux容器）中，这将是 docker ps -s ，但是该命令未在Windows容器上实现。我还尝试了 docker system df -v ，但是也没有实现。

In Linux (Or Linux containers running in a HyperV), this would be docker ps -s, however that command isn't implemented on Windows containers. I also tried docker system df -v but also, not implemented. Perhaps there's a hacky way by looking at a certain directly on disk or something?

推荐答案

我检查了运行于非Windows 10操作系统的Windows 10 1809， HyperV（进程隔离）容器，我非常确定Windows Server容器也是如此。

I checked on Windows 10 1809 running non-HyperV (process isolation) containers, I'm pretty sure its the same for Windows Server containers.

数据似乎保存在：

C:\ProgramData\Docker\windowsfilter\{ContainerId}

在 GraphDriver\Data＼下的 docker inspect {Id} 中直接引用了该文件夹＼dir 。

There's a direct reference to the folder in docker inspect {Id} under GraphDriver\Data\dir.

该文件夹包含文件 sandbox.vhdx ，似乎是每个容器的可写层。

The folder contains file sandbox.vhdx which appears to be the "writable layer" of each container.

我无法打开它并查看文件系统，但是如果我在容器中写入一些数据，我可以强制该文件增长：

I wasn't able to open it and view the filesystem, but if I write some data inside the container I can force the file to grow:

  docker exec <Id> powershell get-childitem c:\ -recurse `> c:\windows\temp\test.txt

当容器停止时该层仍然存在/ restarted，并且在容器 rm ed时删除文件夹。

The layer persists when the container is stopped/restarted, and the folder is removed when the container is rmed.

在研究时，我看到了在moby中打开PR 可以改善对该文件夹的清理。

While researching I saw an open PR in moby to improve cleanup of this folder.

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