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4.21.0-ec.0

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oc adm release extract --tools quay.io/openshift-release-dev/ocp-release:4.21.0-ec.0-aarch64
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Tests:

Upgrades from:

Untested upgrades: 4.20.0-rc.1, 4.20.0-rc.2, 4.20.0-rc.3

Upgrades to:


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Changes from 4.21.0-0.nightly-arm64-2025-10-25-111317

Created: 2025-09-17 00:44:18 +0000 UTC

Image Digest: sha256:14c03a6a2aca58d07db7ec628ed15d444b2dc5878db5d80ea2f2d58af51db707

Components

FeatureGate Changes

FeatureGate Default
Hypershift
Default
SelfManagedHA
DevPreviewNoUpgrade
Hypershift
DevPreviewNoUpgrade
SelfManagedHA
TechPreviewNoUpgrade
Hypershift
TechPreviewNoUpgrade
SelfManagedHA
CBORServingAndStorage
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
ClientsAllowCBOR
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
ClientsPreferCBOR
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
ClusterAPIMachineManagementVSphere
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
EventTTL
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
ManagedBootImagesCPMS
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
MutableCSINodeAllocatableCount
(0 tests)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
Unconditionally Enabled
(Changed)
ExternalOIDCWithUIDAndExtraClaimMappings
(5 tests)
Disabled
(Changed)
Disabled
(Changed)
Enabled Enabled Enabled Enabled
GCPClusterHostedDNSInstall
(0 tests)
Disabled
(Changed)
Disabled
(Changed)
Enabled Enabled Enabled Enabled
ManagedBootImagesAzure
(0 tests)
Disabled
(Changed)
Disabled
(Changed)
Enabled Enabled Enabled Enabled
ManagedBootImagesvSphere
(6 tests)
Disabled
(Changed)
Disabled
(Changed)
Enabled Enabled Enabled Enabled
PreconfiguredUDNAddresses
(6 tests)
Disabled
(Changed)
Disabled
(Changed)
Enabled Enabled Enabled Enabled
VolumeAttributesClass
(50 tests)
Disabled
(Changed)
Disabled
(Changed)
Enabled Enabled Enabled Enabled
ExternalOIDC
(9 tests)
Enabled Disabled
(Changed)
Enabled Enabled Enabled Enabled
NewOLMWebhookProviderOpenshiftServiceCA
(0 tests)
Disabled Disabled
(Changed)
Disabled Enabled Disabled Enabled
IngressControllerLBSubnetsAWS
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
SetEIPForNLBIngressController
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
InsightsConfigAPI
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)
NodeSwap
(0 tests)
Enabled
(New)
Enabled
(New)
Enabled
(New)
Enabled
(New)

New images

Rebuilt images without code change


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: 9.6.20250904-0

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