Add clusterclass support for managed clusters

api/v1beta1/azuremanagedclustertemplate_types.go

@@ -0,0 +1,56 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1beta1
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// AzureManagedClusterTemplateSpec defines the desired state of AzureManagedClusterTemplate.
+type AzureManagedClusterTemplateSpec struct {
+	Template AzureManagedClusterTemplateResource `json:"template"`
+}
+
+// +kubebuilder:object:root=true
+// +kubebuilder:resource:path=azuremanagedclustertemplates,scope=Namespaced,categories=cluster-api
+// +kubebuilder:storageversion
+
+// AzureManagedClusterTemplate is the Schema for the AzureManagedClusterTemplates API.
+type AzureManagedClusterTemplate struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec AzureManagedClusterTemplateSpec `json:"spec,omitempty"`
+}
+
+// +kubebuilder:object:root=true
+
+// AzureManagedClusterTemplateList contains a list of AzureManagedClusterTemplates.
+type AzureManagedClusterTemplateList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []AzureManagedClusterTemplate `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&AzureManagedClusterTemplate{}, &AzureManagedClusterTemplateList{})
+}
+
+// AzureManagedClusterTemplateResource describes the data needed to create an AzureManagedCluster from a template.
+type AzureManagedClusterTemplateResource struct {
+	Spec AzureManagedClusterTemplateResourceSpec `json:"spec"`
+}

api/v1beta1/azuremanagedclustertemplate_webhook.go

@@ -0,0 +1,77 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1beta1
+
+import (
+	"reflect"
+
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/validation/field"
+	"sigs.k8s.io/cluster-api-provider-azure/feature"
+	capifeature "sigs.k8s.io/cluster-api/feature"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/webhook"
+)
+
+// AzureManagedClusterTemplateImmutableMsg is the message used for errors on fields that are immutable.
+const AzureManagedClusterTemplateImmutableMsg = "AzureManagedClusterTemplate spec.template.spec field is immutable. Please create new resource instead. ref doc: https://cluster-api.sigs.k8s.io/tasks/experimental-features/cluster-class/change-clusterclass.html"
+
+// SetupWebhookWithManager sets up and registers the webhook with the manager.
+func (r *AzureManagedClusterTemplate) SetupWebhookWithManager(mgr ctrl.Manager) error {
+	return ctrl.NewWebhookManagedBy(mgr).
+		For(r).
+		Complete()
+}
+
+// +kubebuilder:webhook:verbs=update,path=/validate-infrastructure-cluster-x-k8s-io-v1beta1-azuremanagedclustertemplate,mutating=false,failurePolicy=fail,groups=infrastructure.cluster.x-k8s.io,resources=azuremanagedclustertemplates,versions=v1beta1,name=validation.azuremanagedclustertemplates.infrastructure.cluster.x-k8s.io,sideEffects=None,admissionReviewVersions=v1;v1beta1
+
+var _ webhook.Validator = &AzureManagedClusterTemplate{}
+
+// ValidateCreate implements webhook.Validator so a webhook will be registered for the type.
+func (r *AzureManagedClusterTemplate) ValidateCreate() error {
+	// NOTE: AzureManagedClusterTemplate relies upon MachinePools, which is behind a feature gate flag.
+	// The webhook must prevent creating new objects in case the feature flag is disabled.
+	if !feature.Gates.Enabled(capifeature.MachinePool) {
+		return field.Forbidden(
+			field.NewPath("spec"),
+			"can be set only if the Cluster API 'MachinePool' feature flag is enabled",
+		)
+	}
+	return nil
+}
+
+// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type.
+func (r *AzureManagedClusterTemplate) ValidateUpdate(oldRaw runtime.Object) error {
+	var allErrs field.ErrorList
+	old := oldRaw.(*AzureManagedClusterTemplate)
+	if !reflect.DeepEqual(r.Spec.Template.Spec, old.Spec.Template.Spec) {
+		allErrs = append(allErrs,
+			field.Invalid(field.NewPath("AzureManagedClusterTemplate", "spec", "template", "spec"), rScanInterval, AzureManagedClusterTemplateImmutableMsg),
+		)
+	}
+
+	if len(allErrs) == 0 {
+		return nil
+	}
+	return apierrors.NewInvalid(GroupVersion.WithKind("AzureManagedClusterTemplate").GroupKind(), r.Name, allErrs)
+}
+
+// ValidateDelete implements webhook.Validator so a webhook will be registered for the type.
+func (r *AzureManagedClusterTemplate) ValidateDelete() error {
+	return nil
+}