CODEWITHSUNDEEP
linuxdocker
stackoverheat
stackoverheat

Reputation: 11

How to list all the commands that executed on a pulled Docker image?

I'm currently studying Docker for the lab use. Imagine this is my situation: I created a Docker image and then pushed it to the Docker Hub with my username(e.g. myname/lab1). Later on, my friend pulled my image and then commit some changes on it, then pushed it to the Docker Hub with his username (his/lab1). My question is, assume I'm able to pull his the image (his/lab1) which is built upon my original image, how can I find/list all the changes my friend made to my original image?

Many thanks!

Upvotes: 1

Views: 387

Answers (1)

Robert
Robert

Reputation: 36893

You can use docker history <image_name/id>

▶ docker history ubuntu
IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
f7b3f317ec73        5 weeks ago         /bin/sh -c #(nop)  CMD ["/bin/bash"]            0 B
<missing>           5 weeks ago         /bin/sh -c mkdir -p /run/systemd && echo '...   7 B
<missing>           5 weeks ago         /bin/sh -c sed -i 's/^#\s*\(deb.*universe\...   2.76 kB
<missing>           5 weeks ago         /bin/sh -c rm -rf /var/lib/apt/lists/*          0 B
<missing>           5 weeks ago         /bin/sh -c set -xe   && echo '#!/bin/sh' >...   745 B
<missing>           5 weeks ago         /bin/sh -c #(nop) ADD file:141408db9037263...   117 MB

Add --no-trunc in order to see the complete command (CREATED BY column).

However, IMHO the ideal way to work with your friend should be maintaining a versioned Dockerfile and see the changes there.

If you don't track your changes with Dockerfile, and you use docker commit instead, it is more difficult to see the changes that a layer add. There is a proposal regarding this: https://github.com/moby/moby/issues/12641, that is still an Open Issue, as of Jun/2017.

Upvotes: 3

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