Admission webhook denied the request Not self-signed certificate with SHA1 is not allowed

Solution Unverified - Updated -

Issue

  • Migrator pod in openshift-kube-storage-version-migrator namespace spamming below warning message:
2025-06-23T07:24:33.004776294Z W0623 07:24:33.004710       1 core.go:221] migration of example-service, in the example namespace, will be retried: admission webhook "route.sha1-not-self-signed.rejection" denied the request: Not self-signed certificate with SHA1 is not allowed: https://issues.redhat.com/browse/OCPBUGS-45290

Environment

  • OpenShift Container Platform
    • 4.14

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