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Do you backup your docker images? (lemmy.world)

submitted 6 months ago by thelocalhostinger@lemmy.world to c/selfhosted@lemmy.world

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Not containers and data, but the images. The point would be reproducability in case a remote registry does not contain a certain image anymore. Do you do that and how?

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[–] crater2150@feddit.org 2 points 6 months ago (1 children)

A lot of Dockerfiles start with installing dependencies via the base image's package manager, without specifying exact versions (which isn't always possible, as most distros don't keep all history of all packages in their repos). So all your dependencies may have different versions, when you build again.

[–] realitaetsverlust@piefed.zip 1 points 6 months ago

True, but I got two problems with that thought chain:

I don't want any outdated dependencies within my network. There might be a critical bug in them and if I back up the images, I keep those bugs with me. That seems pretty silly.
If an application breaks because you updated dependencies, you either have to upgrade the application aswell or got some abandonware on your hands, in which case it's probably time to find a new one.