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If you build containers, you should be looking into Docker Slim (lemmy.fancywhale.ca)

submitted 2 years ago by FancyGUI@lemmy.fancywhale.ca to c/selfhosted@lemmy.world

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As the title says. I build containers for my platforms/clients/myself-selfhosted@home and you would not believe how much smaller you can get your images. Here's an example when slimming one of my images:

cmd=build info=results status='MINIFIED' by='18.97X' size.original='1.0 GB' size.optimized='55 MB'

That's a Python app that I didn't have to do multi-staged build with docker because of the Slim command. And it's a working version of that app that I'm using today.

Same for one of my flutter apps that I thought it was as small as it could be:

cmd=build info=results status='MINIFIED' by='1.98X' size.original='66 MB' size.optimized='33 MB'

TLDR: slim your container images!! https://github.com/slimtoolkit/slim

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[–] maor@lemmy.org.il 28 points 2 years ago* (last edited 2 years ago) (2 children)

It ptraces the main container process and cuts off unused files. It also fires some customizable HTTP requests to trigger any dynamically loading libraries. Clever idea. If I understand correctly, the problems that arise to me are:

Undoubtedly some essential files will be omitted. Unless my image consists merely of scratch and an executable, I can't imagine myself successfully covering all edge cases.
What about files that aren't loaded by HTTP requests?

I'm not shitting on this program at all. These are two problems that I'm sure they could solve or just tell straight up "we can't guarantee it'll work in XYZ scenarios. Don't use it if that's your use case". Then I saw that this is backed by some kinda SaaS with a domain that ends with .ai, and that explains why THAT FUCKING README IS WRITTEN like a FUCJik/INg MIND NUMBING LINKEDIN POST that my CEO could write bro what the fuck do you mean by simplifying the value of my digital assets in a seamless secure cost efficient way????? Who fucking cares??? ?WHat does your program ACTUALLY DO??????????

10000000s of seemingly AI-generated paragraphs going on and on about how convenient their product is, 1 measly line in a diagram that describes what it actually does. Again not to shit on the programmers at all, this is a great idea and I'm glad that it's being explored I just hate this industry I can't read another pile of gibberish like that. That ruined my night. Thanks for listening

[–] FancyGUI@lemmy.fancywhale.ca 10 points 2 years ago (1 children)

COuldn't agree more on this! Honestly. I understand that people want hefty descriptions with few inputs on their side, but this is sad.

Anyways! Some of my python cronjobs that I run on my cluster don't have an exposed service, and I can still make it work just fine by passing along the --exec flag and the stuff that takes to run the app. The complicated part is to define properly your environment variables that are necessary to run your use-cases and make sure that you execute all the necessary files. It's not a solution that fits all, for sure! And I honestly don't use it for everything. It's a tool to be used in some use-cases

[–] maor@lemmy.org.il 6 points 2 years ago

Oh there's an --exec flag as well? That's great. This seems like a totally viable solution for cases where the crux of the container is a small script, with a handful of decision branches so the surface area to cover is manageable, but it also needs to come in a non-alpine distro because I assume that's the hefty part that we're like to remove. But that's just off the top of my head, I'm sure there's more. It's genuinely a good idea and it deserves a respectful README as well :(

[–] MaxVerstappen@lemmy.world 6 points 2 years ago

I can feel this reply. Cheers to a better weekend!