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Document additional required host binaries #3841

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twz123 opened this issue Dec 20, 2023 · 14 comments

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twz123 commented Dec 20, 2023

K0s actually requires quite some host binaries to be present on worker machines. The docs should reflect that, and maybe some sysprobes should be added. See #3386 (comment) for details:

Looking at the repo https://github.com/kubernetes/mount-utils where all mount stuff is implemented, replacing (u)mount calls with syscalls is only small part of the problem. There's plenty of other exec calls it does to resize FS, systemd dependencies, FS initialization etc.. Replacing all these is really not feasible or possible. So replacing just mount doesn't really get us anywhere IMO. xref: kubernetes/mount-utils#13

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jnummelin commented Dec 20, 2023

I think the challenge, especially relating to the mount-utils, is that not all the host bins are always needed. I think some of the exec calls are still due to in-tree volume providers and thus not always really needed. But in general I agree, we need to document these at least as soft dependencies.

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twz123 commented Dec 20, 2023

We already check quite some optional things in the sysprobes, e.g. some kernel config options. No need to have them to be hard failures, nevertheless good to know if they're missing.

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ncopa commented Dec 28, 2023

Isn't this fixed with 19c800d which both adds mount/umount to docs and a sysprobe?

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twz123 commented Jan 2, 2024

Isn't this fixed with 19c800d which both adds mount/umount to docs and a sysprobe?

This issue is about even more binaries, as Jussi pointed out in #3386 (comment).

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