# 4.21.0-ec.0
Created: 2025-09-17 00:44:18 +0000 UTC
Image Digest: `sha256:14c03a6a2aca58d07db7ec628ed15d444b2dc5878db5d80ea2f2d58af51db707`
## Changes from 4.21.0-0.nightly-arm64-2025-10-25-111317
### Components
* Kubectl upgraded from 1.34.1 to 1.33.3
* Kubernetes upgraded from 1.34.1 to 1.33.4
* Kubernetes Tests upgraded from 1.34.1 to 1.33.3
* Red Hat Enterprise Linux CoreOS upgraded from 9.6.20251022-0 to 9.6.20250904-0
### 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
* [ovirt-csi-driver](https://github.com/openshift/ovirt-csi-driver) git [1db726a9](https://github.com/openshift/ovirt-csi-driver/commit/1db726a940d5ec150fd185a215f1368990653082) `sha256:7db7ce1563e1bf061930e5e04068a36b8721b36d402ce2d7f0ac7c6fd0cb2d60`
* [ovirt-csi-driver-operator](https://github.com/openshift/ovirt-csi-driver-operator) git [76db379d](https://github.com/openshift/ovirt-csi-driver-operator/commit/76db379d075fdae94ca604f3fa83b0612b36ef8d) `sha256:cf08584bbb3a0e20b350af450c81357685b37e48651944658e29ecfddd05c191`
### Rebuilt images without code change
* [egress-router-cni](https://github.com/openshift/egress-router-cni) git [5e0f8d1b](https://github.com/openshift/egress-router-cni/commit/5e0f8d1b545899fda27c5e1cc8707d33cba1b534) `sha256:7b37a681defbd9959a058dc5afdf0003d504519c61ff09d491329b500b92ffd5`
* [kubevirt-cloud-controller-manager](https://github.com/openshift/cloud-provider-kubevirt) git [3f4542ec](https://github.com/openshift/cloud-provider-kubevirt/commit/3f4542ecd17fb0e47da4c6d9bceb076b98fb314b) `sha256:7e671b7477b93b9e452d4bb81bd3f91fbb3d73f855bd9393ea804f95d47b6a0b`
* [libvirt-machine-controllers](https://github.com/openshift/cluster-api-provider-libvirt) git [a336f0b5](https://github.com/openshift/cluster-api-provider-libvirt/commit/a336f0b5f7ee99c418aaab3d511707bd0064bd56) `sha256:ea81db814203f5f3a7354484c79bc0beae934c78652887057016f9ad3d7908d2`
* [multus-cni](https://github.com/openshift/multus-cni) git [cf0f68ec](https://github.com/openshift/multus-cni/commit/cf0f68ec2b5fe9bc72d0da325e02cf63968747fe) `sha256:3901e75da0b7fa48ca1d815d343e895e09e86e28823acb8416ae8c95daca7af4`
* [multus-cni-microshift](https://github.com/openshift/multus-cni) git [cf0f68ec](https://github.com/openshift/multus-cni/commit/cf0f68ec2b5fe9bc72d0da325e02cf63968747fe) `sha256:24a05cbc31ee750014eb08adcdeccf3b8bb42321d4a45970a9169f0ee9e0bc4b`
* [multus-networkpolicy](https://github.com/openshift/multus-networkpolicy) git [ef99d3d4](https://github.com/openshift/multus-networkpolicy/commit/ef99d3d4cf1a15abfa55ef71b75c0eaa18a791ce) `sha256:fa4aa93709bf82088effb25410a85cc004f849ac85133e8bdcd703a7bd901b09`
* [multus-route-override-cni](https://github.com/openshift/route-override-cni) git [391c1b03](https://github.com/openshift/route-override-cni/commit/391c1b0361e17c5718508810f0bdb6ff66ae6e81) `sha256:b848ed129c0a97ed464229d66ba1d54c908107ad29ec7c5316bb009af549514a`
* [multus-whereabouts-ipam-cni](https://github.com/openshift/whereabouts-cni) git [43c89591](https://github.com/openshift/whereabouts-cni/commit/43c8959152a6ca8afdc73eaed624286628c2c22e) `sha256:ec1e8c120351b7c7b1e20d05cef5bff086a555b23d7c76669daced6d8c2cc0a0`