OCPBUGS-86429: Unpin libreswan version for IPsec scaling fix

[anuragthehatter]

Summary

Unpin libreswan from version 4.6 to enable consuming libreswan 5.x from the FDP repository, which resolves IPsec pluto segfaults at 75+ node scale in 4.18.z.

Background

At 75+ node IPsec mesh scale, libreswan 4.6 pluto crashes with a segfault in set_larval_v2_transition() during concurrent Child SA negotiation, causing permanent tunnel failures. Libreswan 5.x fixes this issue.

This reverts the pin added for OCPBUGS-43498, as libreswan 5.x resolves the scaling problem.

Related Changes

This is part of a coordinated set of PRs to unpin libreswan in 4.18.z:

• openshift/os: this PR
• openshift/machine-config-operator: OCPBUGS-86429: Unpin libreswan and add 5.x compat for IPsec scaling fix machine-config-operator#6310
• openshift/cluster-network-operator: (to be created - skip _stackmanager for libreswan 5.3+)
• openshift/ovn-kubernetes: (to be created - unpin libreswan in Dockerfile)

References

• Bug: https://issues.redhat.com/browse/OCPBUGS-86429
• Brew build: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=66972299
• Cherry-picked from: SDN-5544: Unpin libreswan version #1771 (9bb575a)

🤖 Generated with Claude Code

[openshift-ci-robot]

@anuragthehatter: This pull request references Jira Issue OCPBUGS-86429, which is invalid:

• release note text must be set and not match the template OR release note type must be set to "Release Note Not Required". For more information you can reference the OpenShift Bug Process.
• expected Jira Issue OCPBUGS-86429 to depend on a bug targeting a version in 4.19.0, 4.19.z and in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but no dependents were found

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.

Details

In response to this:

Summary

Unpin libreswan from version 4.6 to enable consuming libreswan 5.x from the FDP repository, which resolves IPsec pluto segfaults at 75+ node scale in 4.18.z.

Background

At 75+ node IPsec mesh scale, libreswan 4.6 pluto crashes with a segfault in set_larval_v2_transition() during concurrent Child SA negotiation, causing permanent tunnel failures. Libreswan 5.x fixes this issue.

This reverts the pin added for OCPBUGS-43498, as libreswan 5.x resolves the scaling problem.

Related Changes

This is part of a coordinated set of PRs to unpin libreswan in 4.18.z:

• openshift/os: this PR
• openshift/machine-config-operator: OCPBUGS-86429: Unpin libreswan and add 5.x compat for IPsec scaling fix machine-config-operator#6310
• openshift/cluster-network-operator: (to be created - skip _stackmanager for libreswan 5.3+)
• openshift/ovn-kubernetes: (to be created - unpin libreswan in Dockerfile)

References

• Bug: https://issues.redhat.com/browse/OCPBUGS-86429
• Brew build: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=66972299
• Cherry-picked from: SDN-5544: Unpin libreswan version #1771 (9bb575a)

🤖 Generated with Claude Code

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[anuragthehatter]

/assign @pperiyasamy for review

[openshift-ci]

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In response to this:

/assign @pperiyasamy for review

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@anuragthehatter: The following test 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/rhcos-9-build-test-qemu	632aa8e	link	true	/test rhcos-9-build-test-qemu

Full PR test history. Your PR dashboard.

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