Through docker Image, how to list out only the dependencies specified in dockerfile and not the ones which are automatically installed?

Question

I have a dockerfile which specified 12 ubuntu dependencies to install. I created a docker image and then spin up a container using that docker image. I just tried to list out the dependencies present in the docker image by "apt list --installed" (by using shell inside running container). I am able to see 409 dependencies which also include automatically installed dependencies. Is there any way by which I can list out only those 12 dependencies listed in docker file?

score 1 · Accepted Answer · answered Jun 23 '18 at 06:56

1

In your container shell, you should try to look for a log file mentioning the recent installed packages.

See "Is it possible to get a list of most recently installed packages?"

For instance:

grep " install " /var/log/dpkg.log

answered Jun 23 '18 at 06:56

VonC

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Thanks @Vonc, the link you shared lists out all the recently installed ubuntu dependencies. Is there any way to list out recently installed python dependencies too. – Sushil Raut Jul 06 '18 at 17:16
@SushilRaut Not sure, as python dependencies are installed through pip (https://stackoverflow.com/a/23885252/6309) – VonC Jul 06 '18 at 18:25

score 0 · Answer 2 · answered Jun 23 '18 at 07:45

0

I would spin up an instance of the base image and list its packages, then diff that list from the one for your derived instance.

answered Jun 23 '18 at 07:45

emory

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Through docker Image, how to list out only the dependencies specified in dockerfile and not the ones which are automatically installed?

2 Answers2