Add flatcar

[sylflo]

What type of PR is this?
/kind feature

What this PR does / why we need it:
Add support for Flatcar

Which issue(s) this PR fixes:

Fixes #5375

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

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[sylflo]

/check-cla

[sylflo]

I did not remove all the check with coreOS "Coreos", "Container Linux by CoreOS". But maybe it should be done in another PR as CoreOS will be EOL by the end of May

[sylflo]

/retest

[k8s-ci-robot]

@sylflo: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

In response to this:

/retest

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[sylflo]

@Miouge1 could it be possible to relaunch the test please ? Or I don't quite understand if I did anything wrong since the test are failing with a timeout https://gitlab.com/kargo-ci/kubernetes-sigs-kubespray/-/jobs/428891428

[Miouge1]

Yes, I restarted that job, the error looked unrelated to your patch.

[sylflo]

@Miouge1 I am sorry to bother you again, now it's this job https://gitlab.com/kargo-ci/kubernetes-sigs-kubespray/-/jobs/428891441 which fails with a timeout :/

[sylflo]

/assign @Miouge1

[Miouge1]

@sylflo can you rebase on latest master? that should solve the RECOVER_CONTROL_PLANE_TEST error.

[sylflo]

@Miouge1

It's way better :). I am just a bit surprised that this test does not pass https://gitlab.com/kargo-ci/kubernetes-sigs-kubespray/-/jobs/439743605.

Apparently it's a problem with ssh, maybe it's this file roles/download/tasks/prep_download.yml but that would be a bit weird if that's the problem no ?
Moreover this job passed with no problem before I rebased https://gitlab.com/kargo-ci/kubernetes-sigs-kubespray/-/jobs/428891430

[Miouge1]

@sylflo sometimes SSH doesn't answer fast enough in CI, a retry got the job green 🤷‍♂

Thank you for the contribution!

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Miouge1, sylflo

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