patchnode_test.go

Documentation: k8s.io/kubernetes/cmd/kubeadm/app/phases/patchnode

     1  /*
     2  Copyright 2020 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 patchnode
    18  
    19  import (
    20  	"bytes"
    21  	"encoding/json"
    22  	"net/http"
    23  	"net/http/httptest"
    24  	"testing"
    25  
    26  	v1 "k8s.io/api/core/v1"
    27  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    28  	clientset "k8s.io/client-go/kubernetes"
    29  	restclient "k8s.io/client-go/rest"
    30  
    31  	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
    32  )
    33  
    34  func TestAnnotateCRISocket(t *testing.T) {
    35  	tests := []struct {
    36  		name                       string
    37  		currentCRISocketAnnotation string
    38  		newCRISocketAnnotation     string
    39  		expectedPatch              string
    40  	}{
    41  		{
    42  			name:                       "CRI-socket annotation missing",
    43  			currentCRISocketAnnotation: "",
    44  			newCRISocketAnnotation:     "unix:///run/containerd/containerd.sock",
    45  			expectedPatch:              `{"metadata":{"annotations":{"kubeadm.alpha.kubernetes.io/cri-socket":"unix:///run/containerd/containerd.sock"}}}`,
    46  		},
    47  		{
    48  			name:                       "CRI-socket annotation already exists",
    49  			currentCRISocketAnnotation: "unix:///run/containerd/containerd.sock",
    50  			newCRISocketAnnotation:     "unix:///run/containerd/containerd.sock",
    51  			expectedPatch:              `{}`,
    52  		},
    53  		{
    54  			name:                       "CRI-socket annotation needs to be updated",
    55  			currentCRISocketAnnotation: "unix:///foo/bar",
    56  			newCRISocketAnnotation:     "unix:///run/containerd/containerd.sock",
    57  			expectedPatch:              `{"metadata":{"annotations":{"kubeadm.alpha.kubernetes.io/cri-socket":"unix:///run/containerd/containerd.sock"}}}`,
    58  		},
    59  	}
    60  
    61  	for _, tc := range tests {
    62  		t.Run(tc.name, func(t *testing.T) {
    63  
    64  			nodename := "node01"
    65  			node := &v1.Node{
    66  				ObjectMeta: metav1.ObjectMeta{
    67  					Name: nodename,
    68  					Labels: map[string]string{
    69  						v1.LabelHostname: nodename,
    70  					},
    71  					Annotations: map[string]string{},
    72  				},
    73  			}
    74  
    75  			if tc.currentCRISocketAnnotation != "" {
    76  				node.ObjectMeta.Annotations[kubeadmconstants.AnnotationKubeadmCRISocket] = tc.currentCRISocketAnnotation
    77  			}
    78  
    79  			jsonNode, err := json.Marshal(node)
    80  			if err != nil {
    81  				t.Fatalf("unexpected encoding error: %v", err)
    82  			}
    83  
    84  			var patchRequest string
    85  			s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
    86  				w.Header().Set("Content-Type", "application/json")
    87  
    88  				if req.URL.Path != "/api/v1/nodes/"+nodename {
    89  					t.Errorf("request for unexpected HTTP resource: %v", req.URL.Path)
    90  					http.Error(w, "", http.StatusNotFound)
    91  					return
    92  				}
    93  
    94  				switch req.Method {
    95  				case "GET":
    96  				case "PATCH":
    97  					buf := new(bytes.Buffer)
    98  					buf.ReadFrom(req.Body)
    99  					patchRequest = buf.String()
   100  				default:
   101  					t.Errorf("request for unexpected HTTP verb: %v", req.Method)
   102  					http.Error(w, "", http.StatusNotFound)
   103  					return
   104  				}
   105  
   106  				w.WriteHeader(http.StatusOK)
   107  				w.Write(jsonNode)
   108  			}))
   109  			defer s.Close()
   110  
   111  			cs, err := clientset.NewForConfig(&restclient.Config{Host: s.URL})
   112  			if err != nil {
   113  				t.Fatalf("unexpected error building clientset: %v", err)
   114  			}
   115  
   116  			if err := AnnotateCRISocket(cs, nodename, tc.newCRISocketAnnotation); err != nil {
   117  				t.Errorf("unexpected error: %v", err)
   118  			}
   119  
   120  			if tc.expectedPatch != patchRequest {
   121  				t.Errorf("expected patch %v, got %v", tc.expectedPatch, patchRequest)
   122  			}
   123  		})
   124  	}
   125  }
   126
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