65 lines
2.2 KiB
Go
Executable File
65 lines
2.2 KiB
Go
Executable File
/*
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Copyright 2023 The Karmada Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package resourcedeletionprotection
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import (
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"context"
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"fmt"
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"net/http"
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admissionv1 "k8s.io/api/admission/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/klog/v2"
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"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
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workv1alpha2 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha2"
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)
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// ValidatingAdmission validates resource templates to ensure those protected resources are not delectable.
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type ValidatingAdmission struct {
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Decoder admission.Decoder
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}
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// Check if our ValidatingAdmission implements necessary interface
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var _ admission.Handler = &ValidatingAdmission{}
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// Handle implements admission.Handler interface.
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// It yields a response to an AdmissionRequest.
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func (v *ValidatingAdmission) Handle(_ context.Context, req admission.Request) admission.Response {
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if req.Operation != admissionv1.Delete {
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// We only care about the Delete operation.
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return admission.Allowed("")
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}
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// Parse the uncertain type resource object
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obj := &unstructured.Unstructured{}
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if err := v.Decoder.DecodeRaw(req.OldObject, obj); err != nil {
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return admission.Errored(http.StatusBadRequest, err)
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}
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klog.V(2).Infof("Validating ResourceDeletionProtection for resource: Kind:%s Name:%s Namespace:%s", req.Kind.Kind, obj.GetName(), obj.GetNamespace())
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if value, ok := obj.GetLabels()[workv1alpha2.DeletionProtectionLabelKey]; ok {
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// In normal, requests will be processed here.
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// Only v1alpha2.DeletionProtectionAlways value will be denied
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if value == workv1alpha2.DeletionProtectionAlways {
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return admission.Denied(fmt.Sprintf("This resource is protected, please make sure to remove the label: %s", workv1alpha2.DeletionProtectionLabelKey))
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}
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}
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return admission.Allowed("")
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}
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