CAPD: add DockerClusterTemplate type

Author: Yuvaraj Kakaraparthi

test/infrastructure/docker/PROJECT

@@ -20,3 +20,6 @@ resources:
 - group: infrastructure
   version: v1alpha4
   kind: DockerMachinePool
+- group: infrastructure
+  version: v1alpha4
+  kind: DockerClusterTemplate

test/infrastructure/docker/api/v1alpha4/dockercluster_webhook.go

@@ -0,0 +1,69 @@
+/*
+Copyright 2021 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 v1alpha4
+
+import (
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/util/validation/field"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/webhook"
+)
+
+func (c *DockerCluster) SetupWebhookWithManager(mgr ctrl.Manager) error {
+	return ctrl.NewWebhookManagedBy(mgr).
+		For(c).
+		Complete()
+}
+
+// +kubebuilder:webhook:verbs=create;update,path=/mutate-infrastructure-cluster-x-k8s-io-v1alpha4-dockercluster,mutating=true,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=dockerclusters,versions=v1alpha4,name=default.dockercluster.infrastructure.cluster.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1
+
+var _ webhook.Defaulter = &DockerCluster{}
+
+// Default implements webhook.Defaulter so a webhook will be registered for the type.
+func (c *DockerCluster) Default() {
+	defaultDockerClusterSpec(&c.Spec)
+}
+
+// +kubebuilder:webhook:verbs=create;update,path=/validate-infrastructure-cluster-x-k8s-io-v1alpha4-dockercluster,mutating=false,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=dockerclusters,versions=v1alpha4,name=validation.dockercluster.infrastructure.cluster.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1
+
+var _ webhook.Validator = &DockerCluster{}
+
+// ValidateCreate implements webhook.Validator so a webhook will be registered for the type.
+func (c *DockerCluster) ValidateCreate() error {
+	allErrs := validateDockerClusterSpec(c.Spec)
+	if len(allErrs) > 0 {
+		return apierrors.NewInvalid(GroupVersion.WithKind("DockerCluster").GroupKind(), c.Name, allErrs)
+	}
+	return nil
+}
+
+// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type.
+func (c *DockerCluster) ValidateUpdate(old runtime.Object) error {
+	return nil
+}
+
+// ValidateDelete implements webhook.Validator so a webhook will be registered for the type.
+func (c *DockerCluster) ValidateDelete() error {
+	return nil
+}
+
+func defaultDockerClusterSpec(s *DockerClusterSpec) {}
+
+func validateDockerClusterSpec(s DockerClusterSpec) field.ErrorList {
+	return nil
+}

test/infrastructure/docker/api/v1alpha4/dockerclustertemplate_types.go

@@ -0,0 +1,55 @@
+/*
+Copyright 2021 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 v1alpha4
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// DockerClusterTemplateSpec defines the desired state of DockerClusterTemplate.
+type DockerClusterTemplateSpec struct {
+	Template DockerClusterTemplateResource `json:"template"`
+}
+
+// +kubebuilder:object:root=true
+
+// DockerClusterTemplate is the Schema for the dockerclustertemplates API.
+type DockerClusterTemplate struct {
+	metav1.TypeMeta   `json:",inline"`
+	metav1.ObjectMeta `json:"metadata,omitempty"`
+
+	Spec DockerClusterTemplateSpec `json:"spec,omitempty"`
+}
+
+// +kubebuilder:object:root=true
+// +kubebuilder:resource:path=dockerclustertemplates,scope=Namespaced,categories=cluster-api
+
+// DockerClusterTemplateList contains a list of DockerClusterTemplate.
+type DockerClusterTemplateList struct {
+	metav1.TypeMeta `json:",inline"`
+	metav1.ListMeta `json:"metadata,omitempty"`
+	Items           []DockerClusterTemplate `json:"items"`
+}
+
+func init() {
+	SchemeBuilder.Register(&DockerClusterTemplate{}, &DockerClusterTemplateList{})
+}
+
+// DockerClusterTemplateResource describes the data needed to create a DockerCluster from a template.
+type DockerClusterTemplateResource struct {
+	Spec DockerClusterSpec `json:"spec"`
+}

test/infrastructure/docker/api/v1alpha4/dockerclustertemplate_webhook.go

@@ -0,0 +1,69 @@
+/*
+Copyright 2021 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 v1alpha4
+
+import (
+	"errors"
+	"reflect"
+
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/runtime"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/webhook"
+)
+
+func (r *DockerClusterTemplate) SetupWebhookWithManager(mgr ctrl.Manager) error {
+	return ctrl.NewWebhookManagedBy(mgr).
+		For(r).
+		Complete()
+}
+
+// +kubebuilder:webhook:verbs=create;update,path=/mutate-infrastructure-cluster-x-k8s-io-v1alpha4-dockerclustertemplate,mutating=true,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=dockerclustertemplates,versions=v1alpha4,name=default.dockerclustertemplate.infrastructure.cluster.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1
+
+var _ webhook.Defaulter = &DockerClusterTemplate{}
+
+// Default implements webhook.Defaulter so a webhook will be registered for the type.
+func (r *DockerClusterTemplate) Default() {
+	defaultDockerClusterSpec(&r.Spec.Template.Spec)
+}
+
+// +kubebuilder:webhook:verbs=create;update,path=/validate-infrastructure-cluster-x-k8s-io-v1alpha4-dockerclustertemplate,mutating=false,failurePolicy=fail,matchPolicy=Equivalent,groups=infrastructure.cluster.x-k8s.io,resources=dockerclustertemplates,versions=v1alpha4,name=validation.dockerclustertemplate.infrastructure.cluster.x-k8s.io,sideEffects=None,admissionReviewVersions=v1beta1
+
+var _ webhook.Validator = &DockerClusterTemplate{}
+
+// ValidateCreate implements webhook.Validator so a webhook will be registered for the type.
+func (r *DockerClusterTemplate) ValidateCreate() error {
+	allErrs := validateDockerClusterSpec(r.Spec.Template.Spec)
+	if len(allErrs) > 0 {
+		return apierrors.NewInvalid(GroupVersion.WithKind("DockerClusterTemplate").GroupKind(), r.Name, allErrs)
+	}
+	return nil
+}
+
+// ValidateUpdate implements webhook.Validator so a webhook will be registered for the type.
+func (r *DockerClusterTemplate) ValidateUpdate(oldRaw runtime.Object) error {
+	old := oldRaw.(*DockerClusterTemplate)
+	if !reflect.DeepEqual(r.Spec, old.Spec) {
+		return errors.New("DockerClusterTemplateSpec is immutable")
+	}
+	return nil
+}
+
+// ValidateDelete implements webhook.Validator so a webhook will be registered for the type.
+func (r *DockerClusterTemplate) ValidateDelete() error {
+	return nil
+}