is there a reason that `kubectl` in rancher desktop doesn t rancher-users #rancher-desktop

Title

quick-keyboard-83126

01/30/2023, 3:00 PM

is there a reason that

kubectl

in rancher desktop doesn't include an arm ?

fast-garage-66093

01/30/2023, 5:29 PM

kubectl

in RD is actually

kuberlr

, which will fetch a compatible version of

kubectl

automatically based on the apiserver version. We only ship the amd64 version because there have been no upstream releases of

kubectl

on arm64 for versions before 1.21.0, I think

quick-keyboard-83126

01/30/2023, 5:30 PM

hmm

WARNING: This version information is deprecated and will be replaced with the output from kubectl version --short.  Use --output=yaml|json to get the full version.
Client Version: <http://version.Info|version.Info>{Major:"1", Minor:"24", GitVersion:"v1.24.1", GitCommit:"3ddd0f45aa91e2f30c70734b175631bec5b5825a", GitTreeState:"clean", BuildDate:"2022-05-24T12:26:19Z", GoVersion:"go1.18.2", Compiler:"gc", Platform:"darwin/amd64"}
Kustomize Version: v4.5.4
Server Version: <http://version.Info|version.Info>{Major:"1", Minor:"23", GitVersion:"v1.23.14-gke.401", GitCommit:"aafb848fb0f7414f744ec2835516352f9f2620bf", GitTreeState:"clean", BuildDate:"2022-11-28T16:13:06Z", GoVersion:"go1.17.13b7", Compiler:"gc", Platform:"linux/amd64"}

I'd expect to end up w/ a darwin/arm64e

fast-garage-66093

01/30/2023, 5:30 PM

Please release a darwin-arm64 binary · Issue #16 · flavio/kuberlr

That issue has the background.

quick-keyboard-83126

01/30/2023, 5:31 PM

(i'll get back to this, it's obviously frustrating, but i'm on a huddle)

fast-garage-66093

01/30/2023, 5:32 PM

Ok, thanks. Please file a bug against `kuberlr`; it needs to be updated to avoid the noise

quick-keyboard-83126

01/31/2023, 9:22 AM

so, https://github.com/flavio/kuberlr/releases/tag/v0.4.2 has an arm binary...

fast-garage-66093

01/31/2023, 5:43 PM

Yes, but that will only work for k8s 1.21.0+ because there are no binaries for arm for the earlier releases

kuberlr

is just a shim; it fetches compatible versions of

kubectl

from upstream.

So to use an arm version, we would have to build and compile a repo of older versions, and then make

kuberlr

fallback to that repo if the version doesn't exist in official releases.

Doable, but not a priority, as the Rosetta versions work just fine.

quick-keyboard-83126

01/31/2023, 5:49 PM

How far back do you need and how much faith do you need in the build process?

I could probably do it. Although I suspect you'd be better served owning the artifacts.

fast-garage-66093

01/31/2023, 5:51 PM

Yes, if the bits are not provided by upstream, then they have to be built by SUSE

It would only have to be done once, for the older bits, but somebody will also have to provide the PR to

kuberlr

to make use of a fallback location

quick-keyboard-83126

01/31/2023, 5:53 PM

There's no way upstream would do it. Their support policy only covers a couple of releases.

How far back do you need?

fast-garage-66093

01/31/2023, 5:55 PM

I don't understand what you are saying here. The whole point of the

kuberlr

mechanism is to seamlessly provide backwards and forwards compatibility because upstream itself doesn't guarantee it.

Rancher Desktop supports k3s versions back to 1.16.7 IIRC. It is arguable that nobody will ever use them, but if we don't support them with

kubectl

, then we need additional code in RD as well

quick-keyboard-83126

01/31/2023, 5:56 PM

https://endoflife.date/kubernetes says 1.23 and older are dead. So there's no way they'd accept a PR to build older clients

fast-garage-66093

01/31/2023, 5:58 PM

I know; that's why I said SUSE would have to build them and put them in a separate repo. But we would not want to publish versions for newer releases, so

kuberlr

would have to try to fetch the bits from upstream, and if they don't exist there, try once more against the SUSE repo with the older releases. That's why I said it needs additional support in kuberlr as well

quick-keyboard-83126

01/31/2023, 5:59 PM

I can see about building 1.16.7 for myself and then write a demo patch for kubelr

fast-garage-66093

01/31/2023, 6:00 PM

It should be a relatively simple script to build all the old versions automatically (assuming it actually builds). If I can get a script, we can run it on a build machine and put in a publish-to-github part as well.

👍 1

I just hope that the old releases can be compiled with newer versions of Go, as the old Go versions that upstream used to compile e.g. 1.16.x are likely not able to produce the darwin-arm64 binaries we need.

quick-keyboard-83126

01/31/2023, 6:02 PM

Yeah, that'll be the first thing I'll check.

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