There are a lot of <https github com k3s io k3s issues q=is rancher-users #k3s

Title

lively-wolf-56294

05/02/2023, 12:49 PM

There are a lot of High CPU use issues reported in GitHub. I sympathize with this latest post https://canthonyscott.com/k3s-cpu-usage-bug-remains/. Most of my tests are on arm64 (RockPi 4). I have tested versions from v1.24.x until v1.27.1. The use case is very simple: just start

k3s.service

and

k3s-server

takes >50% of CPU and a good chunk of RAM too.

k3s check-config

passes. Checked the k3s logs but it looks normal to me. What else could be done to address the High CPU use on arm64?

✅ 1

Installing k3s using the steps from web page:

curl -sfL <https://get.k3s.io> | sh - 
# Check for Ready node, takes ~30 seconds 
sudo k3s kubectl get node

clever-air-65544

05/02/2023, 4:34 PM

You've linked a list with 89 closed bugs, 5 open

RockPi is a very low powered device, kubernetes is a pretty big resource hog, the fact that it's runnable on k3s highights that it is in fact lightweight

lively-wolf-56294

05/02/2023, 5:08 PM

Hi Chris, thank you for replying to my post. Which arm64 HW do you recommend to run k3s?

from the official k3s installation is possible to install k3s with debug symbols to profile which part of the code is consuming the CPU?

creamy-pencil-82913

05/02/2023, 9:05 PM

I would encourage you to look at: • https://github.com/k3s-io/k3s/issues/3117#issuecomment-1325549185 • https://github.com/k3s-io/k3s/issues/2278#issuecomment-771104128

🎉 1

and no, we do not ship a version with extra symbols because that’s not generally how one profiles golang, but we do have a flag to enable pprof.

👍 1

lively-wolf-56294

05/02/2023, 9:30 PM

Those links clarify and answer my questions. Thank you so much for taking your time to look and share it!

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