crd_regression_test.go

Documentation: k8s.io/kubernetes/test/integration/apiserver

     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  }
   140
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