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crds.go
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crds.go
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/*
Copyright 2020 The Kubermatic Kubernetes Platform contributors.
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 gatekeeper
import (
"embed"
_ "embed"
"fmt"
"k8c.io/kubermatic/v2/pkg/resources/reconciling"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/apimachinery/pkg/util/yaml"
)
// embeddedFS is an embedded fs that contains Gatekeeper CRD manifests
//
//go:embed static/*
var embeddedFS embed.FS
// CRDs returns a list of CRDs.
func CRDs() ([]apiextensionsv1.CustomResourceDefinition, error) {
files, err := embeddedFS.ReadDir("static")
if err != nil {
return nil, err
}
result := []apiextensionsv1.CustomResourceDefinition{}
for _, info := range files {
crd, err := loadCRD(info.Name())
if err != nil {
return nil, fmt.Errorf("failed to open CRD: %w", err)
}
result = append(result, *crd)
}
return result, nil
}
func loadCRD(filename string) (*apiextensionsv1.CustomResourceDefinition, error) {
f, err := embeddedFS.Open("static/" + filename)
if err != nil {
return nil, err
}
defer f.Close()
crd := &apiextensionsv1.CustomResourceDefinition{}
dec := yaml.NewYAMLOrJSONDecoder(f, 1024)
if err := dec.Decode(crd); err != nil {
return nil, err
}
return crd, nil
}
// CRDReconciler returns a reconciler for a CRD.
func CRDReconciler(crd apiextensionsv1.CustomResourceDefinition) reconciling.NamedCustomResourceDefinitionReconcilerFactory {
return func() (string, reconciling.CustomResourceDefinitionReconciler) {
return crd.Name, func(target *apiextensionsv1.CustomResourceDefinition) (*apiextensionsv1.CustomResourceDefinition, error) {
target.Labels = crd.Labels
target.Annotations = crd.Annotations
target.Spec = crd.Spec
// reconcile fails if conversion is not set as it's set by default to None
target.Spec.Conversion = &apiextensionsv1.CustomResourceConversion{Strategy: apiextensionsv1.NoneConverter}
return target, nil
}
}
}