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[release-4.21] OCPBUGS-69685: openshift: CAPI IPAM TechPreviewNoUpgrade: set webhooks failurepolicy: Ignore #257

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[release-4.21] OCPBUGS-69685: openshift: CAPI IPAM TechPreviewNoUpgrade: set webhooks failurepolicy: Ignore #257

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219c3cd
UPSTREAM: <carry>: openshift: set Core CAPI IPAM webhooks to failureP…
damdo Dec 15, 2025
aa0b86b
UPSTREAM: <drop>: Generate OpenShift manifests
damdo Dec 15, 2025
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92 changes: 46 additions & 46 deletions openshift/infrastructure-components-openshift.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -24393,6 +24393,52 @@ metadata:
clusterctl.cluster.x-k8s.io: ""
name: capi-validating-webhook-configuration
webhooks:
- admissionReviewVersions:
- v1
- v1beta1
clientConfig:
service:
name: capi-webhook-service
namespace: openshift-cluster-api
path: /validate-ipam-cluster-x-k8s-io-v1beta2-ipaddress
failurePolicy: Ignore
matchPolicy: Equivalent
name: validation.ipaddress.ipam.cluster.x-k8s.io
rules:
- apiGroups:
- ipam.cluster.x-k8s.io
apiVersions:
- v1beta2
operations:
- CREATE
- UPDATE
- DELETE
resources:
- ipaddresses
sideEffects: None
- admissionReviewVersions:
- v1
- v1beta1
clientConfig:
service:
name: capi-webhook-service
namespace: openshift-cluster-api
path: /validate-ipam-cluster-x-k8s-io-v1beta2-ipaddressclaim
failurePolicy: Ignore
matchPolicy: Equivalent
name: validation.ipaddressclaim.ipam.cluster.x-k8s.io
rules:
- apiGroups:
- ipam.cluster.x-k8s.io
apiVersions:
- v1beta2
operations:
- CREATE
- UPDATE
- DELETE
resources:
- ipaddressclaims
sideEffects: None
- admissionReviewVersions:
- v1
- v1beta1
Expand Down Expand Up @@ -24637,52 +24683,6 @@ webhooks:
resources:
- machinepools
sideEffects: None
- admissionReviewVersions:
- v1
- v1beta1
clientConfig:
service:
name: capi-webhook-service
namespace: openshift-cluster-api
path: /validate-ipam-cluster-x-k8s-io-v1beta2-ipaddress
failurePolicy: Fail
matchPolicy: Equivalent
name: validation.ipaddress.ipam.cluster.x-k8s.io
rules:
- apiGroups:
- ipam.cluster.x-k8s.io
apiVersions:
- v1beta2
operations:
- CREATE
- UPDATE
- DELETE
resources:
- ipaddresses
sideEffects: None
- admissionReviewVersions:
- v1
- v1beta1
clientConfig:
service:
name: capi-webhook-service
namespace: openshift-cluster-api
path: /validate-ipam-cluster-x-k8s-io-v1beta2-ipaddressclaim
failurePolicy: Fail
matchPolicy: Equivalent
name: validation.ipaddressclaim.ipam.cluster.x-k8s.io
rules:
- apiGroups:
- ipam.cluster.x-k8s.io
apiVersions:
- v1beta2
operations:
- CREATE
- UPDATE
- DELETE
resources:
- ipaddressclaims
sideEffects: None
---
apiVersion: v1
kind: Service
Expand Down
6 changes: 3 additions & 3 deletions openshift/kustomization.yaml
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Expand Up @@ -4,6 +4,6 @@ kind: Kustomization
resources:
- ../config/default

patchesStrategicMerge:
- ./patches/enable-metadata-syncing.yaml

patches:
- path: ./patches/enable-metadata-syncing.yaml
- path: ./patches/failure-policy-ignore-ipam-webhooks.yaml
2 changes: 1 addition & 1 deletion openshift/manifests/0000_30_cluster-api_04_cm.core-cluster-api.yaml
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24 changes: 24 additions & 0 deletions openshift/patches/failure-policy-ignore-ipam-webhooks.yaml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,24 @@
# Set the failurePolicy to Ignore for the validating webhooks handling IPAM resources.
#
# During bootstrap, the bootstrap node's Kube API Server receives IPAM create requests but is unable
# to reach the webhooks in the Cluster API namespace.
#
# This is because the bootstrap node doesn't have a route to the pods as it doesn't have access to the pod networks.
# If failurePolicy is set to Fail, the KAS cannot reach the webhook endpoints and the request fails, preventing creation of IPAddress and IPAddressClaim resources.
#
# This causes a chicken-and-egg problem as it prevents IPAM provisioning
# for the workers which won't start without their IP addresses being allocated.
#
# Setting failurePolicy to Ignore allows the resources to be created even when the webhooks are
# unreachable during bootstrap, matching what Machine API also does.
#
# More context: https://redhat-internal.slack.com/archives/C0A2M43S199/p1765540108488539
apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingWebhookConfiguration
metadata:
name: capi-validating-webhook-configuration
webhooks:
- name: validation.ipaddress.ipam.cluster.x-k8s.io
failurePolicy: Ignore
- name: validation.ipaddressclaim.ipam.cluster.x-k8s.io
failurePolicy: Ignore