OCPBUGS-55335: apiserver: remove the requirement for LoopbackClientConfig

[vrutkovs]

What type of PR is this?

/kind bug

What this PR does / why we need it:

This setting is verifying that apiserver always have a config to connect to itself via loopback connection. This config includes a certificate key pair generated on the fly and stored in memory.

This function is also used by library-go to create any controller (i.e. operator). The controllers don't need loopback connections to function, so it generates certificate keypairs and doesn't use them.

Removing the requirement for LoopbackClientConfig won't affect how apiservers functions (all of them have it created and that doesn't change) and it allows library-go controllers to avoid creating in-memory certificate keypair not included in TLS registry

[openshift-ci-robot]

@vrutkovs: This pull request references Jira Issue OCPBUGS-55335, which is invalid:

• expected the bug to target the "4.19.0" version, but no target version was set

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

What type of PR is this?

/kind bug

What this PR does / why we need it:

This setting is verifying that apiserver always have a config to connect to itself via loopback connection. This config includes a certificate key pair generated on the fly and stored in memory.

This function is also used by library-go to create any controller (i.e. operator). The controllers don't need loopback connections to function, so it generates certificate keypairs and doesn't use them.

Removing the requirement for LoopbackClientConfig won't affect how apiservers functions (all of them have it created and that doesn't change) and it allows library-go controllers to avoid creating in-memory certificate keypair not included in TLS registry

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[openshift-ci-robot]

@vrutkovs: the contents of this pull request could not be automatically validated.

The following commits could not be validated and must be approved by a top-level approver:

• 119ef25|UPSTREAM: : OCPBUGS-55335: apiserver: remove the requirement for LoopbackClientConfig: does not specify an upstream backport in the commit message

Comment /validate-backports to re-evaluate validity of the upstream PRs, for example when they are merged upstream.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: vrutkovs
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[benluddy]

We don't have any operators that build against our Kubernetes fork, do we? If you wanted to pursue this approach I think you'd have to do it via https://github.com/openshift/kubernetes-apiserver/, but I don't think any of our operators should be using that, either.

[openshift-ci]

@vrutkovs: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-aws-ovn-runc	119ef25	link	true	/test e2e-aws-ovn-runc
ci/prow/e2e-aws-ovn-cgroupsv2	119ef25	link	true	/test e2e-aws-ovn-cgroupsv2
ci/prow/okd-scos-e2e-aws-ovn	119ef25	link	false	/test okd-scos-e2e-aws-ovn
ci/prow/e2e-agnostic-ovn-cmd	119ef25	link	false	/test e2e-agnostic-ovn-cmd
ci/prow/e2e-aws-ovn-serial	119ef25	link	true	/test e2e-aws-ovn-serial

Full PR test history. Your PR dashboard.

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