75 lines
2.4 KiB
Go
75 lines
2.4 KiB
Go
/*
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Copyright 2018 The Kubernetes 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 webhook
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import (
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"fmt"
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"k8s.io/api/admission/v1"
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apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
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apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/klog/v2"
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)
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// This function expects all CRDs submitted to it to be apiextensions.k8s.io/v1beta1 or apiextensions.k8s.io/v1.
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func admitCRD(ar v1.AdmissionReview) *v1.AdmissionResponse {
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klog.V(2).Info("admitting crd")
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resource := "customresourcedefinitions"
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v1beta1GVR := metav1.GroupVersionResource{Group: apiextensionsv1beta1.GroupName, Version: "v1beta1", Resource: resource}
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v1GVR := metav1.GroupVersionResource{Group: apiextensionsv1.GroupName, Version: "v1", Resource: resource}
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reviewResponse := v1.AdmissionResponse{}
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reviewResponse.Allowed = true
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raw := ar.Request.Object.Raw
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var labels map[string]string
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switch ar.Request.Resource {
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case v1beta1GVR:
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crd := apiextensionsv1beta1.CustomResourceDefinition{}
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deserializer := codecs.UniversalDeserializer()
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if _, _, err := deserializer.Decode(raw, nil, &crd); err != nil {
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klog.Error(err)
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return toV1AdmissionResponse(err)
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}
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labels = crd.Labels
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case v1GVR:
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crd := apiextensionsv1.CustomResourceDefinition{}
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deserializer := codecs.UniversalDeserializer()
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if _, _, err := deserializer.Decode(raw, nil, &crd); err != nil {
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klog.Error(err)
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return toV1AdmissionResponse(err)
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}
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labels = crd.Labels
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default:
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err := fmt.Errorf("expect resource to be one of [%v, %v] but got %v", v1beta1GVR, v1GVR, ar.Request.Resource)
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klog.Error(err)
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return toV1AdmissionResponse(err)
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}
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if v, ok := labels["webhook-e2e-test"]; ok {
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if v == "webhook-disallow" {
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reviewResponse.Allowed = false
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reviewResponse.Result = &metav1.Status{Message: "the crd contains unwanted label"}
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}
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}
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return &reviewResponse
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}
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