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cluster_template.go
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cluster_template.go
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// Copyright 2021 VMware
//
// 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.
// +versionName=v1alpha1
// +groupName=carto.run
// +kubebuilder:object:generate=true
package v1alpha1
import (
"errors"
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/json"
"sigs.k8s.io/controller-runtime/pkg/webhook"
)
// +kubebuilder:object:root=true
// +kubebuilder:subresource:status
// +kubebuilder:resource:scope=Cluster
type ClusterTemplate struct {
metav1.TypeMeta `json:",inline"`
metav1.ObjectMeta `json:"metadata"`
Spec TemplateSpec `json:"spec"`
Status TemplateStatus `json:"status,omitempty"`
}
type TemplateSpec struct {
// +kubebuilder:pruning:PreserveUnknownFields
Template *runtime.RawExtension `json:"template,omitempty"`
Ytt string `json:"ytt,omitempty"`
Params TemplateParams `json:"params,omitempty"`
}
type TemplateStatus struct {
}
var _ webhook.Validator = &ClusterTemplate{}
func (c *ClusterTemplate) ValidateCreate() error {
return c.Spec.validate()
}
func (c *ClusterTemplate) ValidateUpdate(_ runtime.Object) error {
return c.Spec.validate()
}
func (c *ClusterTemplate) ValidateDelete() error {
return nil
}
func (t *TemplateSpec) validate() error {
if t.Template == nil && t.Ytt == "" {
return fmt.Errorf("invalid template: must specify one of template or ytt, found neither")
}
if t.Template != nil && t.Ytt != "" {
return fmt.Errorf("invalid template: must specify one of template or ytt, found both")
}
if t.Template != nil {
obj := metav1.PartialObjectMetadata{}
if err := json.Unmarshal(t.Template.Raw, &obj); err != nil {
return fmt.Errorf("invalid template: failed to parse object metadata: %w", err)
}
if obj.Namespace != metav1.NamespaceNone {
return errors.New("invalid template: template should not set metadata.namespace on the child object")
}
}
return nil
}
// +kubebuilder:object:root=true
type ClusterTemplateList struct {
metav1.TypeMeta `json:",inline"`
metav1.ListMeta `json:"metadata,omitempty"`
Items []ClusterTemplate `json:"items"`
}
func init() {
SchemeBuilder.Register(
&ClusterTemplate{},
&ClusterTemplateList{},
)
}