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util.go
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util.go
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// Copyright 2019 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package util
import (
"encoding/json"
"gomodules.xyz/jsonpatch/v2"
admission "k8s.io/api/admission/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
)
// ARFail is a helper function to create an AdmissionResponse
// with an embedded error
func ARFail(err error) *admission.AdmissionResponse {
return &admission.AdmissionResponse{
Allowed: false,
Result: &metav1.Status{
Message: err.Error(),
Reason: metav1.StatusReasonNotAcceptable,
},
}
}
// ARSuccess return allow to action
func ARSuccess() *admission.AdmissionResponse {
return &admission.AdmissionResponse{
Allowed: true,
}
}
// ARPatch return admission response that contains a patch to mutate the object
func ARPatch(patch []byte) *admission.AdmissionResponse {
return &admission.AdmissionResponse{
Allowed: true,
Patch: patch,
PatchType: func() *admission.PatchType { p := admission.PatchTypeJSONPatch; return &p }(),
}
}
func CreateJsonPatch(original, current runtime.Object) ([]byte, error) {
ori, err := json.Marshal(original)
if err != nil {
return nil, err
}
cur, err := json.Marshal(current)
if err != nil {
return nil, err
}
patches, err := jsonpatch.CreatePatch(ori, cur)
if err != nil {
return nil, err
}
return json.Marshal(patches)
}