如何分析Docker容器的磁盘使用情况 [英] How to analyze disk usage of a Docker container
问题描述
我可以看到Docker占用了12GB的文件系统:
I can see that Docker takes 12GB of my filesystem:
2.7G /var/lib/docker/vfs/dir
2.7G /var/lib/docker/vfs
2.8G /var/lib/docker/devicemapper/mnt
6.3G /var/lib/docker/devicemapper/devicemapper
9.1G /var/lib/docker/devicemapper
12G /var/lib/docker
但是,我怎么知道它是如何分布在容器上的?
But, how do I know how this is distributed over the containers?
我尝试通过运行(新的v1.3命令)将其附加到容器上
I tried to attach to the containers by running (the new v1.3 command)
docker exec -it <container_name> bash
,然后运行"df -h"以分析磁盘使用情况.似乎可行,但不适用于使用"volumes-from"的容器.
and then running 'df -h' to analyze the disk usage. It seems to be working, but not with containers that use 'volumes-from'.
例如,我为MongoDB使用了仅数据容器,称为"mongo-data".
For example, I use a data-only container for MongoDB, called 'mongo-data'.
当我先运行docker run -it --volumes-from mongo-data busybox
,然后在容器内运行df -h
时,它表示安装在/data/db
(我的"mongo-data"仅数据容器)上的文件系统使用11.3G,但是当我执行du -h /data/db
,它说它仅使用2.1G.
When I run docker run -it --volumes-from mongo-data busybox
, and then df -h
inside the container, It says that the filesystem mounted on /data/db
(my 'mongo-data' data-only container) uses 11.3G, but when I do du -h /data/db
, it says that it uses only 2.1G.
那么,如何分析容器/卷磁盘使用情况?或者,就我而言,如何找出"mongo-data"容器的大小?
So, how do I analyze a container/volume disk usage? Or, in my case, how do I find out the 'mongo-data' container size?
推荐答案
要查看容器的文件大小,可以使用docker ps
的--size
参数:
To see the file size of your containers, you can use the --size
argument of docker ps
:
docker ps --size
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