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7bb4a3bace
conflict. Adding unit test verify that deleteValidation is retried. adding e2e test verifying the webhook can intercept configmap and custom resource deletion, and the existing object is sent via the admissionreview.OldObject. update the admission integration test to verify that the existing object is passed to the deletion admission webhook as oldObject, in case of an immediate deletion and in case of an update-on-delete.
105 lines
3.3 KiB
Go
105 lines
3.3 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 main
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import (
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"k8s.io/api/admission/v1beta1"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/klog"
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)
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const (
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configMapPatch1 string = `[
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{ "op": "add", "path": "/data/mutation-stage-1", "value": "yes" }
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]`
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configMapPatch2 string = `[
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{ "op": "add", "path": "/data/mutation-stage-2", "value": "yes" }
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]`
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)
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// deny configmaps with specific key-value pair.
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func admitConfigMaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
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klog.V(2).Info("admitting configmaps")
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configMapResource := metav1.GroupVersionResource{Group: "", Version: "v1", Resource: "configmaps"}
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if ar.Request.Resource != configMapResource {
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klog.Errorf("expect resource to be %s", configMapResource)
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return nil
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}
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var raw []byte
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if ar.Request.Operation == v1beta1.Delete {
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raw = ar.Request.OldObject.Raw
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} else {
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raw = ar.Request.Object.Raw
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}
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configmap := corev1.ConfigMap{}
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deserializer := codecs.UniversalDeserializer()
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if _, _, err := deserializer.Decode(raw, nil, &configmap); err != nil {
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klog.Error(err)
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return toAdmissionResponse(err)
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}
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reviewResponse := v1beta1.AdmissionResponse{}
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reviewResponse.Allowed = true
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for k, v := range configmap.Data {
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if k == "webhook-e2e-test" && v == "webhook-disallow" &&
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(ar.Request.Operation == v1beta1.Create || ar.Request.Operation == v1beta1.Update) {
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reviewResponse.Allowed = false
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reviewResponse.Result = &metav1.Status{
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Reason: "the configmap contains unwanted key and value",
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}
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}
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if k == "webhook-e2e-test" && v == "webhook-nondeletable" && ar.Request.Operation == v1beta1.Delete {
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reviewResponse.Allowed = false
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reviewResponse.Result = &metav1.Status{
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Reason: "the configmap cannot be deleted because it contains unwanted key and value",
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}
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}
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}
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return &reviewResponse
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}
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func mutateConfigmaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
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klog.V(2).Info("mutating configmaps")
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configMapResource := metav1.GroupVersionResource{Group: "", Version: "v1", Resource: "configmaps"}
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if ar.Request.Resource != configMapResource {
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klog.Errorf("expect resource to be %s", configMapResource)
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return nil
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}
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raw := ar.Request.Object.Raw
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configmap := corev1.ConfigMap{}
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deserializer := codecs.UniversalDeserializer()
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if _, _, err := deserializer.Decode(raw, nil, &configmap); err != nil {
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klog.Error(err)
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return toAdmissionResponse(err)
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}
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reviewResponse := v1beta1.AdmissionResponse{}
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reviewResponse.Allowed = true
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if configmap.Data["mutation-start"] == "yes" {
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reviewResponse.Patch = []byte(configMapPatch1)
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}
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if configmap.Data["mutation-stage-1"] == "yes" {
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reviewResponse.Patch = []byte(configMapPatch2)
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}
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pt := v1beta1.PatchTypeJSONPatch
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reviewResponse.PatchType = &pt
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return &reviewResponse
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}
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