protocol.go

Documentation: k8s.io/kubernetes/test/e2e/apimachinery

     1  /*
     2  Copyright 2019 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 apimachinery
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  
    23  	g "github.com/onsi/ginkgo/v2"
    24  	o "github.com/onsi/gomega"
    25  
    26  	v1 "k8s.io/api/core/v1"
    27  	apierrors "k8s.io/apimachinery/pkg/api/errors"
    28  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    29  	"k8s.io/apimachinery/pkg/fields"
    30  	"k8s.io/apimachinery/pkg/watch"
    31  	"k8s.io/client-go/kubernetes"
    32  	admissionapi "k8s.io/pod-security-admission/api"
    33  
    34  	"k8s.io/kubernetes/test/e2e/framework"
    35  )
    36  
    37  var _ = SIGDescribe("client-go should negotiate", func() {
    38  	f := framework.NewDefaultFramework("protocol")
    39  	f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
    40  
    41  	for _, s := range []string{
    42  		"application/json",
    43  		"application/vnd.kubernetes.protobuf",
    44  		"application/vnd.kubernetes.protobuf,application/json",
    45  		"application/json,application/vnd.kubernetes.protobuf",
    46  	} {
    47  		accept := s
    48  		g.It(fmt.Sprintf("watch and report errors with accept %q", accept), func() {
    49  			g.By("creating an object for which we will watch")
    50  			ns := f.Namespace.Name
    51  			client := f.ClientSet.CoreV1().ConfigMaps(ns)
    52  			configMapName := "e2e-client-go-test-negotiation"
    53  			testConfigMap := &v1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: configMapName}}
    54  			before, err := client.List(context.TODO(), metav1.ListOptions{})
    55  			framework.ExpectNoError(err)
    56  			_, err = client.Create(context.TODO(), testConfigMap, metav1.CreateOptions{})
    57  			framework.ExpectNoError(err)
    58  			opts := metav1.ListOptions{
    59  				ResourceVersion: before.ResourceVersion,
    60  				FieldSelector:   fields.SelectorFromSet(fields.Set{"metadata.name": configMapName}).String(),
    61  			}
    62  
    63  			g.By("watching for changes on the object")
    64  			cfg, err := framework.LoadConfig()
    65  			framework.ExpectNoError(err)
    66  
    67  			cfg.AcceptContentTypes = accept
    68  
    69  			c := kubernetes.NewForConfigOrDie(cfg)
    70  			w, err := c.CoreV1().ConfigMaps(ns).Watch(context.TODO(), opts)
    71  			framework.ExpectNoError(err)
    72  			defer w.Stop()
    73  
    74  			evt, ok := <-w.ResultChan()
    75  			o.Expect(ok).To(o.BeTrue())
    76  			switch evt.Type {
    77  			case watch.Added, watch.Modified:
    78  				// this is allowed
    79  			case watch.Error:
    80  				err := apierrors.FromObject(evt.Object)
    81  				// In Kubernetes 1.17 and earlier, the api server returns both apierrors.StatusReasonExpired and
    82  				// apierrors.StatusReasonGone for HTTP 410 (Gone) status code responses. In 1.18 the kube server is more consistent
    83  				// and always returns apierrors.StatusReasonExpired. For backward compatibility we can only remove the apierrs.IsGone
    84  				// check when we fully drop support for Kubernetes 1.17 servers from reflectors.
    85  				if apierrors.IsGone(err) || apierrors.IsResourceExpired(err) {
    86  					// this is allowed, since the kubernetes object could be very old
    87  					break
    88  				}
    89  				if apierrors.IsUnexpectedObjectError(err) {
    90  					g.Fail(fmt.Sprintf("unexpected object, wanted v1.Status: %#v", evt.Object))
    91  				}
    92  				g.Fail(fmt.Sprintf("unexpected error: %#v", evt.Object))
    93  			default:
    94  				g.Fail(fmt.Sprintf("unexpected type %s: %#v", evt.Type, evt.Object))
    95  			}
    96  		})
    97  	}
    98  })
    99
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