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4.21.0-ec.1

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.1-s390x
Team Approvals:

No tests for this release

Upgrades from:

Untested upgrades: 4.20.0-rc.0, 4.20.0-rc.1, 4.20.0-rc.2, 4.20.0-rc.3, 4.21.0-ec.0

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Changes from 4.21.0-ec.0

Created: 2025-09-30 19:20:09 +0000 UTC

Image Digest: sha256:25c9117f99eef5c19f29f534de1daa4f4b5ff4b1227346a8c9f1981be08e68c3

Components

FeatureGate Changes

FeatureGate Default
Hypershift
Default
SelfManagedHA
DevPreviewNoUpgrade
Hypershift
DevPreviewNoUpgrade
SelfManagedHA
TechPreviewNoUpgrade
Hypershift
TechPreviewNoUpgrade
SelfManagedHA
InsightsConfigAPI
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
GCPClusterHostedDNSInstall
(0 tests)
Enabled
(Changed)
Enabled
(Changed)
Enabled Enabled Enabled Enabled
CBORServingAndStorage
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
ClientsAllowCBOR
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
ClientsPreferCBOR
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
ClusterAPIMachineManagementVSphere
(0 tests)
Enabled
(New)
Enabled
(New)

Rebuilt images without code change

agent-installer-api-server

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

agent-installer-node-agent

agent-installer-utils

aws-cloud-controller-manager, aws-cluster-api-controllers, aws-ebs-csi-driver, aws-ebs-csi-driver-operator, aws-machine-controllers, aws-pod-identity-webhook, azure-cloud-controller-manager, azure-cloud-node-manager, azure-cluster-api-controllers, azure-disk-csi-driver, azure-disk-csi-driver-operator, azure-file-csi-driver, azure-file-csi-driver-operator, azure-machine-controllers, azure-workload-identity-webhook, csi-driver-manila, csi-driver-manila-operator, csi-driver-nfs, gcp-cloud-controller-manager, gcp-cluster-api-controllers, gcp-machine-controllers, gcp-pd-csi-driver, gcp-pd-csi-driver-operator, hyperkube, ironic, ironic-agent, ironic-machine-os-downloader, ironic-static-ip-manager, kube-proxy, machine-image-customization-controller, 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

azure-service-operator

baremetal-installer, installer, installer-artifacts

baremetal-operator

cli, cli-artifacts, deployer, tools

cloud-credential-operator

cluster-authentication-operator

cluster-baremetal-operator

cluster-capi-controllers

cluster-capi-operator

cluster-cloud-controller-manager-operator

cluster-config-api

cluster-control-plane-machine-set-operator

cluster-csi-snapshot-controller-operator

cluster-dns-operator

cluster-etcd-operator

cluster-ingress-operator

cluster-kube-apiserver-operator

cluster-kube-cluster-api-operator

cluster-kube-controller-manager-operator

cluster-kube-scheduler-operator

cluster-machine-approver

cluster-monitoring-operator

cluster-network-operator

cluster-node-tuning-operator

cluster-olm-operator

cluster-openshift-apiserver-operator

cluster-openshift-controller-manager-operator

cluster-policy-controller

cluster-samples-operator

cluster-storage-operator

console

console-operator

coredns

csi-external-attacher

csi-external-resizer

csi-external-snapshot-metadata

csi-external-snapshotter, csi-snapshot-controller

docker-registry

driver-toolkit

haproxy-router

hypershift

ibm-cloud-controller-manager

ibmcloud-cluster-api-controllers

ibmcloud-machine-controllers

insights-operator

kube-state-metrics

machine-api-operator

machine-config-operator

monitoring-plugin

network-tools

networking-console-plugin

oauth-apiserver

oc-mirror

olm-catalogd, olm-operator-controller

openshift-apiserver

openshift-controller-manager

openstack-cinder-csi-driver-operator

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

operator-marketplace

ovn-kubernetes, ovn-kubernetes-microshift

prom-label-proxy

prometheus

prometheus-node-exporter

rhel-coreos, rhel-coreos-extensions

route-controller-manager

service-ca-operator

telemeter

tests

thanos


Node Image Info

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Package List

Full list (539 packages)

Changed:

Extensions

Full list (143 packages)


Red Hat Enterprise Linux CoreOS base layer: 9.6.20250925-0

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