k8s.io/kubernetes@v1.29.3/test/integration/apiserver/crd_regression_test.go (about) 1 /* 2 Copyright 2022 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package apiserver 18 19 import ( 20 "context" 21 "fmt" 22 "testing" 23 "time" 24 25 apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1" 26 "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset" 27 metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" 28 "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" 29 "k8s.io/apimachinery/pkg/runtime/schema" 30 "k8s.io/apimachinery/pkg/util/wait" 31 "k8s.io/client-go/dynamic" 32 apiservertesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing" 33 "k8s.io/kubernetes/test/integration/framework" 34 "k8s.io/utils/pointer" 35 ) 36 37 // Regression test for https://issues.k8s.io/109099 38 func TestCRDExponentialRecursionBug(t *testing.T) { 39 server, err := apiservertesting.StartTestServer(t, apiservertesting.NewDefaultTestServerOptions(), nil, framework.SharedEtcd()) 40 if err != nil { 41 t.Fatal(err) 42 } 43 defer server.TearDownFn() 44 config := server.ClientConfig 45 46 apiExtensionClient, err := clientset.NewForConfig(config) 47 if err != nil { 48 t.Fatal(err) 49 } 50 dynamicClient, err := dynamic.NewForConfig(config) 51 if err != nil { 52 t.Fatal(err) 53 } 54 55 crd := &apiextensionsv1.CustomResourceDefinition{ 56 ObjectMeta: metav1.ObjectMeta{ 57 Name: "crontabs.stable.example.com", 58 }, 59 Spec: apiextensionsv1.CustomResourceDefinitionSpec{ 60 Group: "stable.example.com", 61 Scope: apiextensionsv1.ClusterScoped, 62 Names: apiextensionsv1.CustomResourceDefinitionNames{ 63 Plural: "crontabs", 64 Singular: "crontab", 65 Kind: "CronTab", 66 ListKind: "CronTabList", 67 }, 68 Versions: []apiextensionsv1.CustomResourceDefinitionVersion{ 69 { 70 Name: "v1beta1", 71 Served: true, 72 Storage: true, 73 Schema: &apiextensionsv1.CustomResourceValidation{ 74 OpenAPIV3Schema: &apiextensionsv1.JSONSchemaProps{ 75 XPreserveUnknownFields: pointer.BoolPtr(true), 76 Type: "object", 77 Properties: map[string]apiextensionsv1.JSONSchemaProps{}, 78 }, 79 }, 80 }, 81 }, 82 }, 83 } 84 85 crd, err = apiExtensionClient.ApiextensionsV1().CustomResourceDefinitions().Create(context.TODO(), crd, metav1.CreateOptions{}) 86 if err != nil { 87 t.Fatal(err) 88 } 89 90 // Wait until the CRD exist in discovery 91 err = wait.PollImmediate(100*time.Millisecond, 15*time.Second, func() (bool, error) { 92 groupResource, err := apiExtensionClient.Discovery().ServerResourcesForGroupVersion(crd.Spec.Group + "/" + crd.Spec.Versions[0].Name) 93 if err != nil { 94 return false, nil 95 } 96 for _, g := range groupResource.APIResources { 97 if g.Name == crd.Spec.Names.Plural { 98 return true, nil 99 } 100 } 101 return false, nil 102 }) 103 if err != nil { 104 t.Fatal(err) 105 } 106 107 gvr := schema.GroupVersionResource{ 108 Group: crd.Spec.Group, 109 Version: crd.Spec.Versions[0].Name, 110 Resource: crd.Spec.Names.Plural, 111 } 112 113 crClient := dynamicClient.Resource(gvr) 114 115 instance := &unstructured.Unstructured{ 116 Object: map[string]interface{}{ 117 "apiVersion": gvr.Group + "/" + gvr.Version, 118 "kind": crd.Spec.Names.Kind, 119 "metadata": map[string]interface{}{ 120 "name": "instanceame", 121 }, 122 "spec": map[string]interface{}{}, 123 }, 124 } 125 126 // create a object with nested fields to trigger the bug 127 var m map[string]interface{} 128 m = instance.Object["spec"].(map[string]interface{}) 129 for i := 0; i < 50; i++ { 130 m[fmt.Sprintf("field%d", i)] = map[string]interface{}{} 131 m = m[fmt.Sprintf("field%d", i)].(map[string]interface{}) 132 } 133 134 _, err = crClient.Create(context.TODO(), instance, metav1.CreateOptions{}) 135 if err != nil { 136 t.Errorf("Failed to create custom resource: %v", err) 137 } 138 139 }