NO-JIRA: always set minAvailable on PDBs to 1

[sjenning]

We are currently experiencing issues in CI when the autoscaler scales down the cluster and evicts pods from actively running mgmt clusters running prow jobs. These mgmt clusters run SingleReplica to save on resources and can not tolerate being evicted without control plane downtime. Depending on when this downtime occurs during the job, it frequently causes flakes.

Setting minAvailable to 1 on deployments that are required for smooth running of the KAS (etcd, kas itself, aggregated apiservers, and ingress to the kas) will prevent these pods from being evicted until the jobs complete.

[stevekuznetsov]

/lgtm
/approve

[openshift-ci]

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This pull-request has been approved by: sjenning, stevekuznetsov

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[openshift-ci-robot]

@sjenning: This pull request explicitly references no jira issue.

In response to this:

We are currently experiencing issues in CI when the autoscaler scales down the cluster and evicts pods from actively running mgmt clusters running prow jobs. These mgmt clusters run SingleReplica to save on resources and can not tolerate being evicted without control plane downtime. Depending on when this downtime occurs during the job, it frequently causes flakes.

Setting minAvailable to 1 on deployments that are required for smooth running of the KAS (etcd, kas itself, aggregated apiservers, and ingress to the kas) will prevent these pods from being evicted until the jobs complete.

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[sjenning]

/test e2e-aws

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[openshift-bot]

[ART PR BUILD NOTIFIER]

This PR has been included in build ose-hypershift-container-v4.16.0-202402211939.p0.gaa65231.assembly.stream.el9 for distgit hypershift.
All builds following this will include this PR.