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4.21.0-ec.2

Download the installer for your operating system or run

oc adm release extract --tools quay.io/openshift-release-dev/ocp-release:4.21.0-ec.2-aarch64
Team Approvals:

Tests:

Upgrades from:

Untested upgrades: 4.20.0, 4.21.0-ec.0

Changes from 4.21.0-ec.1

Created: 2025-10-22 07:55:16 +0000 UTC

Image Digest: sha256:0dd6daa56e0a6aa8760c419fa6529a46703fb2b32fe14973de9d39e0bccd0bde

Components

FeatureGate Changes

FeatureGate Default
Hypershift
Default
SelfManagedHA
DevPreviewNoUpgrade
Hypershift
DevPreviewNoUpgrade
SelfManagedHA
TechPreviewNoUpgrade
Hypershift
TechPreviewNoUpgrade
SelfManagedHA
IngressControllerLBSubnetsAWS
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
NodeSwap
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
SetEIPForNLBIngressController
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
ExternalOIDCWithUIDAndExtraClaimMappings
(0 tests)
Enabled
(Changed)
Enabled
(Changed)
Enabled Enabled Enabled Enabled
ManagedBootImagesAzure
(0 tests)
Enabled
(Changed)
Enabled
(Changed)
Enabled Enabled Enabled Enabled
ManagedBootImagesvSphere
(0 tests)
Enabled
(Changed)
Enabled
(Changed)
Enabled Enabled Enabled Enabled
PreconfiguredUDNAddresses
(0 tests)
Enabled
(Changed)
Enabled
(Changed)
Enabled Enabled Enabled Enabled
VolumeAttributesClass
(0 tests)
Enabled
(Changed)
Enabled
(Changed)
Enabled Enabled Enabled Enabled
ExternalOIDC
(0 tests)
Enabled Enabled
(Changed)
Enabled Enabled Enabled Enabled
EventTTL
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
ManagedBootImagesCPMS
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)

Removed images

Rebuilt images without code change

agent-installer-api-server

agent-installer-csr-approver, agent-installer-orchestrator

agent-installer-node-agent

agent-installer-utils

apiserver-network-proxy

aws-cloud-controller-manager

aws-cluster-api-controllers

aws-ebs-csi-driver

aws-ebs-csi-driver-operator, azure-disk-csi-driver-operator, azure-file-csi-driver-operator, openstack-cinder-csi-driver-operator

aws-karpenter-provider-aws

aws-kms-encryption-provider

aws-machine-controllers

aws-pod-identity-webhook

azure-cloud-controller-manager, azure-cloud-node-manager

azure-cluster-api-controllers

azure-file-csi-driver

azure-kms-encryption-provider

azure-machine-controllers

azure-service-operator

azure-workload-identity-webhook

baremetal-cluster-api-controllers

baremetal-installer, installer, installer-artifacts

baremetal-machine-controllers

baremetal-operator

baremetal-runtimecfg

cli, cli-artifacts, deployer, tools

cloud-credential-operator

cloud-network-config-controller

cluster-authentication-operator

cluster-autoscaler

cluster-autoscaler-operator

cluster-baremetal-operator

cluster-bootstrap

cluster-capi-controllers

cluster-capi-operator

cluster-cloud-controller-manager-operator

cluster-config-api

cluster-config-operator

cluster-control-plane-machine-set-operator

cluster-csi-snapshot-controller-operator

cluster-dns-operator

cluster-etcd-operator

cluster-image-registry-operator

cluster-ingress-operator

cluster-kube-apiserver-operator

cluster-kube-cluster-api-operator

cluster-kube-controller-manager-operator

cluster-kube-scheduler-operator

cluster-kube-storage-version-migrator-operator

cluster-machine-approver

cluster-monitoring-operator

cluster-network-operator

cluster-node-tuning-operator

cluster-olm-operator

cluster-openshift-apiserver-operator

cluster-policy-controller

cluster-samples-operator

cluster-storage-operator

cluster-update-keys

cluster-version-operator

configmap-reloader

console

console-operator

container-networking-plugins, containernetworking-plugins-microshift

coredns

csi-driver-manila, csi-driver-manila-operator, csi-driver-nfs, hyperkube, ibm-cloud-controller-manager, ibm-vpc-block-csi-driver, ibm-vpc-block-csi-driver-operator, ibmcloud-cluster-api-controllers, ibmcloud-machine-controllers, kube-proxy, nutanix-cloud-controller-manager, nutanix-machine-controllers, pod, powervs-block-csi-driver, powervs-block-csi-driver-operator, powervs-cloud-controller-manager, powervs-machine-controllers, vsphere-cloud-controller-manager, vsphere-cluster-api-controllers, vsphere-csi-driver, vsphere-csi-driver-operator, vsphere-csi-driver-syncer, vsphere-problem-detector

csi-external-attacher

csi-external-provisioner

csi-external-resizer

csi-external-snapshotter, csi-snapshot-controller

csi-livenessprobe

csi-node-driver-registrar

docker-builder

docker-registry

etcd

gcp-cloud-controller-manager

gcp-cluster-api-controllers

gcp-machine-controllers

gcp-pd-csi-driver

gcp-workload-identity-federation-webhook

haproxy-router

hypershift

insights-operator

insights-runtime-exporter, insights-runtime-extractor

ironic

ironic-agent

ironic-machine-os-downloader

ironic-static-ip-manager

kube-metrics-server

kube-state-metrics

kube-storage-version-migrator

machine-api-operator

machine-config-operator

machine-image-customization-controller

machine-os-images

monitoring-plugin

multus-admission-controller

must-gather

network-interface-bond-cni

network-tools

networking-console-plugin

oauth-apiserver

oc-mirror

olm-catalogd, olm-operator-controller

openshift-apiserver

openshift-state-metrics

openstack-cinder-csi-driver, openstack-cloud-controller-manager

openstack-cluster-api-controllers

openstack-machine-api-provider

operator-framework-tools, operator-lifecycle-manager, operator-registry

operator-marketplace

ovn-kubernetes, ovn-kubernetes-microshift

prom-label-proxy

prometheus

prometheus-alertmanager

prometheus-config-reloader, prometheus-operator, prometheus-operator-admission-webhook

rhel-coreos, rhel-coreos-extensions

route-controller-manager

service-ca-operator

tests

volume-data-source-validator


Node Image Info

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Package List

Full list (551 packages)

Changed:

Extensions

Full list (144 packages)


Red Hat Enterprise Linux CoreOS base layer: 9.6.20251017-0

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Source code for this page located on github