# 4.21.0-ec.0
Created: 2025-09-17 00:42:16 +0000 UTC
Image Digest: `sha256:254783c8928b9d8b0ed4cb5257602c8995fa721b1f3b8c83b9a49690f5ccdd79`
## Changes from 4.21.0-0.nightly-s390x-2025-10-22-031809
### 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 1.33.4 to 1.33.3
* Red Hat Enterprise Linux CoreOS upgraded from 9.6.20251021-0 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) |
| 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) `sha256:9ae79afa39ed9cd6b5846c100ee16f61ffcc04e10ce4c65ac6b0efce2586e6b0`
* [ovirt-csi-driver-operator](https://github.com/openshift/ovirt-csi-driver-operator) git [76db379d](https://github.com/openshift/ovirt-csi-driver-operator/commit/76db379d075fdae94ca604f3fa83b0612b36ef8d) `sha256:9fc7232e3e009bcd0131067bc4cf3acb4bae3c14cd86b0c9c741daeede611bb7`
### 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) `sha256:545a0e48110cc783bb90c8b1a1a277cc6e473c51810a6a1ba2b94f32451c5fe6`
* [kubevirt-cloud-controller-manager](https://github.com/openshift/cloud-provider-kubevirt) git [3f4542ec](https://github.com/openshift/cloud-provider-kubevirt/commit/3f4542ecd17fb0e47da4c6d9bceb076b98fb314b) `sha256:4f40f3cb5f6f1dc6f9a1615fce00ed94c78174d7e6d51bacc98852e99ff8bccf`
* [libvirt-machine-controllers](https://github.com/openshift/cluster-api-provider-libvirt) git [a336f0b5](https://github.com/openshift/cluster-api-provider-libvirt/commit/a336f0b5f7ee99c418aaab3d511707bd0064bd56) `sha256:ab6791356bc923ebc8c87305729c47735e38bc7f2b2b605e4ab3eb84b4544ffd`
* [metallb-frr](https://github.com/openshift/frr) git [fc0fe74f](https://github.com/openshift/frr/commit/fc0fe74f94b415b28d772dbc61f6323171a11b50) `sha256:9ae996c1dc1819b57e2b6ea8b4241cab1d5b3608d8bdba156a1606d723a1c94b`
* [multus-cni](https://github.com/openshift/multus-cni) git [cf0f68ec](https://github.com/openshift/multus-cni/commit/cf0f68ec2b5fe9bc72d0da325e02cf63968747fe) `sha256:532a5692c62b132471479530f262ec08df2ddd52f7a1b8bdc38993837f6446bd`
* [multus-cni-microshift](https://github.com/openshift/multus-cni) git [cf0f68ec](https://github.com/openshift/multus-cni/commit/cf0f68ec2b5fe9bc72d0da325e02cf63968747fe) `sha256:e0823d4033f5d4f45966d4d428031bce7013b7b24960054454799c31055c7f10`
* [multus-networkpolicy](https://github.com/openshift/multus-networkpolicy) git [ef99d3d4](https://github.com/openshift/multus-networkpolicy/commit/ef99d3d4cf1a15abfa55ef71b75c0eaa18a791ce) `sha256:e28024a1c94bf29076bad085d80e6e3c73e4f1ae1a038ad01700a5f54eb79820`
* [multus-route-override-cni](https://github.com/openshift/route-override-cni) git [391c1b03](https://github.com/openshift/route-override-cni/commit/391c1b0361e17c5718508810f0bdb6ff66ae6e81) `sha256:16c7aafd19e0f856579a1d2b71e330c5423ad616fb3c695644a19a03a6eccc5d`
* [multus-whereabouts-ipam-cni](https://github.com/openshift/whereabouts-cni) git [43c89591](https://github.com/openshift/whereabouts-cni/commit/43c8959152a6ca8afdc73eaed624286628c2c22e) `sha256:85720af1d704664de35d93e88403c3ff1315d2cd647b74777b2a4184ed54b5f3`