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[release-4.15] OCPBUGS-43742: Soften haproxy timeout for kubeapi probe #4663

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[release-4.15] OCPBUGS-43742: Soften haproxy timeout for kubeapi probe #4663

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This is an automated cherry-pick of #4657

/assign openshift-ci-robot

@mkowalski
OCPBUGS-43428: Soften haproxy timeout for kubeapi probe
cabbd67 
This PR changes timeouts used by haproxy when deciding whether the
master backend (i.e. k8s api server) is dead or alive.

The previous probe was relatively strict, allowing for a very fast
failover but at the same time very prone to temporary flakiness.

The new configuration aligns haproxy with the readiness probe used by
k8s when detecting if pod is dead or alive. Aligning those
configurations removes the mismatch we have when k8s believes api server
is ready but haproxy sees it as dead.

A consequence of this change is a potential increase of the downtime
when api server is forcefully removed. In the worst case scenario we may
see unavailability for 15 seconds. This should not be happening much in
a real setups, but for the sake of completeness this should be noted.

Fixes: OCPBUGS-43428
@openshift-cherrypick-robot openshift-cherrypick-robot mentioned this pull request Oct 26, 2024
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@openshift-cherrypick-robot: Detected clone of Jira Issue OCPBUGS-43719 with correct target version. Will retitle the PR to link to the clone.
/retitle [release-4.15] OCPBUGS-43742: Soften haproxy timeout for kubeapi probe

In response to this:

This is an automated cherry-pick of #4657

/assign openshift-ci-robot

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@openshift-ci openshift-ci bot changed the title [release-4.15] OCPBUGS-43719: Soften haproxy timeout for kubeapi probe [release-4.15] OCPBUGS-43742: Soften haproxy timeout for kubeapi probe Oct 26, 2024
@openshift-ci-robot openshift-ci-robot added jira/valid-reference Indicates that this PR references a valid Jira ticket of any type. jira/invalid-bug Indicates that a referenced Jira bug is invalid for the branch this PR is targeting. labels Oct 26, 2024
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@openshift-cherrypick-robot: This pull request references Jira Issue OCPBUGS-43742, which is invalid:

  • expected dependent Jira Issue OCPBUGS-43741 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is New instead

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:

This is an automated cherry-pick of #4657

/assign openshift-ci-robot

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

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openshift-ci bot commented Oct 26, 2024

@openshift-cherrypick-robot: 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/okd-scos-e2e-gcp-ovn-upgrade cabbd67 link false /test okd-scos-e2e-gcp-ovn-upgrade
ci/prow/okd-scos-e2e-aws-ovn cabbd67 link false /test okd-scos-e2e-aws-ovn
ci/prow/e2e-vsphere-ovn-upi-zones cabbd67 link false /test e2e-vsphere-ovn-upi-zones
ci/prow/okd-scos-e2e-gcp-op cabbd67 link false /test okd-scos-e2e-gcp-op

Full PR test history. Your PR dashboard.

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/lgtm

@openshift-ci openshift-ci bot added the lgtm Indicates that a PR is ready to be merged. label Oct 28, 2024
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openshift-ci bot commented Oct 28, 2024

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mkowalski, openshift-cherrypick-robot
Once this PR has been reviewed and has the lgtm label, please assign yuqi-zhang for approval. For more information see the Kubernetes Code Review Process.

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