CAPD: add DockerClusterTemplate type

test/infrastructure/docker/PROJECT

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

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/config/crd/bases/infrastructure.cluster.x-k8s.io_dockerclustertemplates.yaml

@@ -0,0 +1,103 @@
+
+---
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    controller-gen.kubebuilder.io/version: v0.6.1
+  creationTimestamp: null
+  name: dockerclustertemplates.infrastructure.cluster.x-k8s.io
+spec:
+  group: infrastructure.cluster.x-k8s.io
+  names:
+    kind: DockerClusterTemplate
+    listKind: DockerClusterTemplateList
+    plural: dockerclustertemplates
+    singular: dockerclustertemplate
+  scope: Namespaced
+  versions:
+  - name: v1alpha4
+    schema:
+      openAPIV3Schema:
+        description: DockerClusterTemplate is the Schema for the dockerclustertemplates
+          API.
+        properties:
+          apiVersion:
+            description: 'APIVersion defines the versioned schema of this representation
+              of an object. Servers should convert recognized schemas to the latest
+              internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
+            type: string
+          kind:
+            description: 'Kind is a string value representing the REST resource this
+              object represents. Servers may infer this from the endpoint the client
+              submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
+            type: string
+          metadata:
+            type: object
+          spec:
+            description: DockerClusterTemplateSpec defines the desired state of DockerClusterTemplate.
+            properties:
+              template:
+                description: DockerClusterTemplateResource describes the data needed
+                  to create a DockerCluster from a template.
+                properties:
+                  spec:
+                    description: DockerClusterSpec defines the desired state of DockerCluster.
+                    properties:
+                      controlPlaneEndpoint:
+                        description: ControlPlaneEndpoint represents the endpoint
+                          used to communicate with the control plane.
+                        properties:
+                          host:
+                            description: Host is the hostname on which the API server
+                              is serving.
+                            type: string
+                          port:
+                            description: Port is the port on which the API server
+                              is serving.
+                            type: integer
+                        required:
+                        - host
+                        - port
+                        type: object
+                      failureDomains:
+                        additionalProperties:
+                          description: FailureDomainSpec is the Schema for Cluster
+                            API failure domains. It allows controllers to understand
+                            how many failure domains a cluster can optionally span
+                            across.
+                          properties:
+                            attributes:
+                              additionalProperties:
+                                type: string
+                              description: Attributes is a free form map of attributes
+                                an infrastructure provider might use or require.
+                              type: object
+                            controlPlane:
+                              description: ControlPlane determines if this failure
+                                domain is suitable for use by control plane machines.
+                              type: boolean
+                          type: object
+                        description: FailureDomains are not usulaly defined on the
+                          spec. The docker provider is special since failure domains
+                          don't mean anything in a local docker environment. Instead,
+                          the docker cluster controller will simply copy these into
+                          the Status and allow the Cluster API controllers to do what
+                          they will with the defined failure domains.
+                        type: object
+                    type: object
+                required:
+                - spec
+                type: object
+            required:
+            - template
+            type: object
+        type: object
+    served: true
+    storage: true
+status:
+  acceptedNames:
+    kind: ""
+    plural: ""
+  conditions: []
+  storedVersions: []

test/infrastructure/docker/config/crd/kustomization.yaml

@@ -12,19 +12,22 @@ resources:
 - bases/infrastructure.cluster.x-k8s.io_dockerclusters.yaml
 - bases/infrastructure.cluster.x-k8s.io_dockermachinetemplates.yaml
 - bases/infrastructure.cluster.x-k8s.io_dockermachinepools.yaml
+- bases/infrastructure.cluster.x-k8s.io_dockerclustertemplates.yaml
 # +kubebuilder:scaffold:crdkustomizeresource
 
 patchesStrategicMerge: []
 # [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix.
 # patches here are for enabling the conversion webhook for each CRD
 #- patches/webhook_in_dockermachines.yaml
 #- patches/webhook_in_dockerclusters.yaml
+#- patches/webhook_in_dockerclustertemplates.yaml
 # +kubebuilder:scaffold:crdkustomizewebhookpatch
 
 # [CERTMANAGER] To enable webhook, uncomment all the sections with [CERTMANAGER] prefix.
 # patches here are for enabling the CA injection for each CRD
 #- patches/cainjection_in_dockermachines.yaml
 #- patches/cainjection_in_dockerclusters.yaml
+#- patches/cainjection_in_dockerclustertemplates.yaml
 # +kubebuilder:scaffold:crdkustomizecainjectionpatch
 
 # the following config is for teaching kustomize how to do kustomization for CRDs.

test/infrastructure/docker/config/crd/patches/cainjection_in_dockerclustertemplates.yaml

@@ -0,0 +1,8 @@
+# The following patch adds a directive for certmanager to inject CA into the CRD
+# CRD conversion requires k8s 1.13 or later.
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME)
+  name: dockerclustertemplates.infrastructure.cluster.x-k8s.io

test/infrastructure/docker/config/crd/patches/webhook_in_dockerclustertemplates.yaml

@@ -0,0 +1,17 @@
+# The following patch enables conversion webhook for CRD
+# CRD conversion requires k8s 1.13 or later.
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  name: dockerclustertemplates.infrastructure.cluster.x-k8s.io
+spec:
+  conversion:
+    strategy: Webhook
+    webhookClientConfig:
+      # this is "\n" used as a placeholder, otherwise it will be rejected by the apiserver for being blank,
+      # but we're going to set it later using the cert-manager (or potentially a patch if not using cert-manager)
+      caBundle: Cg==
+      service:
+        namespace: system
+        name: webhook-service
+        path: /convert