4.21.0-rc.1-202601071524.p0

This is a candidate release for 4.21.0.

See the mirror for build artifacts:

• https://mirror.openshift.com/pub/openshift-v4/x86_64/microshift/ocp/4.21.0-rc.1/
• https://mirror.openshift.com/pub/openshift-v4/aarch64/microshift/ocp/4.21.0-rc.1/

Or add this RPM repository to your x86 systems:

[microshift-4.21.0-rc-1]
name=MicroShift 4.21.0 EarlyAccess rc.1 RPMs
baseurl=https://mirror.openshift.com/pub/openshift-v4/x86_64/microshift/ocp/4.21.0-rc.1/el9/os/
enabled=1
gpgcheck=0
skip_if_unavailable=0

or for aarch64 systems:

[microshift-4.21.0-rc-1]
name=MicroShift 4.21.0 EarlyAccess rc.1 RPMs
baseurl=https://mirror.openshift.com/pub/openshift-v4/aarch64/microshift/ocp/4.21.0-rc.1/el9/os/
enabled=1
gpgcheck=0
skip_if_unavailable=0

What's Changed

• [release-4.21] USHIFT-6136: CI implementation: Support prefer-align-cpus-by-uncorecache featureGate by @agullon in #5951
• [release-4.21] NO-ISSUE: Fix variable name in scenario.sh by @openshift-cherrypick-robot in #5956
• [release-4.21] USHIFT-6379: Extend timeouts in dualstack tests by @openshift-cherrypick-robot in #5957
• [release-4.21] USHIFT-6386: Update common_versions.sh file when 4.21 rc is released by @agullon in #5953
• [release-4.21] OCPBUGS-70139: Observability tests are failing when restarting microshift-observability service by @openshift-cherrypick-robot in #5968
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2025-12-21-151341_amd64-2025-12-21_arm64-2025-12-22 by @microshift-rebase-script[bot] in #5963
• [release-4.21] USHIFT-6380: Fix OLM test random failures by @ggiguash in #5971
• [release-4.21] USHIFT-6422: Fix BREW_LREL_RELEASE_VERSION to use RC version when LATEST_RELEASE_TYPE=rc by @openshift-cherrypick-robot in #5974
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2025-12-22-170804_amd64-2025-12-22_arm64-2025-12-23 by @microshift-rebase-script[bot] in #5972
• [release-4.21] USHIFT-6425: Increase LVMS deployment default timeouts in the configuration test by @openshift-cherrypick-robot in #5977
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2025-12-22-170804_amd64-2025-12-22_arm64-2025-12-23 by @microshift-rebase-script[bot] in #5978
• [release-4.21] USHIFT-6417: Fix optional scenario skip for sriov by @ggiguash in #5980
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2025-12-24-191318_amd64-2025-12-24_arm64-2025-12-24 by @microshift-rebase-script[bot] in #5984
• [release-4.21] USHIFT-6431: Retry Loki and Prometheus image pull by @openshift-cherrypick-robot in #5992
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2025-12-29-125551_amd64-2025-12-29_arm64-2025-12-29 by @microshift-rebase-script[bot] in #5993
• [release-4.21] USHIFT-6430: Optimize service restart sequence in FeatureGates suite by @openshift-cherrypick-robot in #5995
• [release-4.21] USHIFT-6427: Update script to wait for all containers to be ready in the pod by @openshift-cherrypick-robot in #5998
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2025-12-30-041927_amd64-2025-12-30_arm64-2025-12-30 by @microshift-rebase-script[bot] in #5997
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2026-01-01-151233_amd64-2026-01-01_arm64-2026-01-01 by @microshift-rebase-script[bot] in #6002
• [release-4.21] USHIFT-6436: Increase GDP test deployment timeouts to 5m by @openshift-cherrypick-robot in #6007
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2026-01-02-092922_amd64-2026-01-02_arm64-2026-01-04 by @microshift-rebase-script[bot] in #6013
• [release-4.21] USHIFT-6439: Increase the default timeout of microshift pod creation to 5m by @openshift-cherrypick-robot in #6017
• [release-4.21] USHIFT-6437: Add a delay when restarting MicroShift service by @openshift-cherrypick-robot in #6023
• [release-4.21] USHIFT-6432: Move rhel96-bootc.image-bootc to base group2 to optimize cache build time by @openshift-cherrypick-robot in #6021
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2026-01-04-010945_amd64-2026-01-04_arm64-2026-01-06 by @microshift-rebase-script[bot] in #6024
• NO-ISSUE: rebase-release-4.21-4.21.0-0.nightly-2026-01-06-165528_amd64-2026-01-06_arm64-2026-01-06 by @microshift-rebase-script[bot] in #6030
• [release-4.21] USHIFT-6360: Merge 4 release scenarios into two by @openshift-cherrypick-robot in #6026

Full Changelog: 4.21.0-rc.0-202512191500.p0...4.21.0-rc.1-202601071524.p0