65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
/*
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Copyright 2021 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 overridepolicy
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import (
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"context"
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"encoding/json"
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"net/http"
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"k8s.io/klog/v2"
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"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
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policyv1alpha1 "github.com/karmada-io/karmada/pkg/apis/policy/v1alpha1"
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)
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// MutatingAdmission mutates API request if necessary.
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type MutatingAdmission struct {
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Decoder admission.Decoder
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}
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// Check if our MutatingAdmission implements necessary interface
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var _ admission.Handler = &MutatingAdmission{}
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// Handle yields a response to an AdmissionRequest.
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func (a *MutatingAdmission) Handle(_ context.Context, req admission.Request) admission.Response {
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policy := &policyv1alpha1.OverridePolicy{}
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err := a.Decoder.Decode(req, policy)
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if err != nil {
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return admission.Errored(http.StatusBadRequest, err)
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}
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// Set default namespace for all resource selector if not set.
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// We need to get the default namespace from the request because for kube-apiserver < v1.24,
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// the namespace of the object with namespace unset in the mutating webook chain of a create request
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// is not populated yet. See https://github.com/kubernetes/kubernetes/pull/94637 for more details.
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for i := range policy.Spec.ResourceSelectors {
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if len(policy.Spec.ResourceSelectors[i].Namespace) == 0 {
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klog.Infof("Setting resource selector default namespace for policy: %s/%s", req.Namespace, policy.Name)
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policy.Spec.ResourceSelectors[i].Namespace = req.Namespace
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}
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}
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marshaledBytes, err := json.Marshal(policy)
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if err != nil {
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return admission.Errored(http.StatusInternalServerError, err)
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}
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return admission.PatchResponseFromRaw(req.Object.Raw, marshaledBytes)
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}
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