mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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570 lines
17 KiB
Go
570 lines
17 KiB
Go
/*
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Copyright 2016 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 garbagecollector
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import (
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"net/http"
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"net/http/httptest"
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"reflect"
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"strings"
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"sync"
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"testing"
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"github.com/stretchr/testify/assert"
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_ "k8s.io/kubernetes/pkg/api/install"
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"k8s.io/apimachinery/pkg/api/meta"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/runtime/serializer"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/json"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/strategicpatch"
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"k8s.io/client-go/dynamic"
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restclient "k8s.io/client-go/rest"
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"k8s.io/client-go/util/workqueue"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/controller/garbagecollector/metaonly"
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)
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func TestNewGarbageCollector(t *testing.T) {
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config := &restclient.Config{}
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config.ContentConfig.NegotiatedSerializer = serializer.DirectCodecFactory{CodecFactory: metaonly.NewMetadataCodecFactory()}
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metaOnlyClientPool := dynamic.NewClientPool(config, api.Registry.RESTMapper(), dynamic.LegacyAPIPathResolverFunc)
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config.ContentConfig.NegotiatedSerializer = nil
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clientPool := dynamic.NewClientPool(config, api.Registry.RESTMapper(), dynamic.LegacyAPIPathResolverFunc)
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podResource := map[schema.GroupVersionResource]struct{}{
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schema.GroupVersionResource{Version: "v1", Resource: "pods"}: {},
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// no monitor will be constructed for non-core resource, the GC construction will not fail.
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schema.GroupVersionResource{Group: "tpr.io", Version: "v1", Resource: "unknown"}: {},
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}
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gc, err := NewGarbageCollector(metaOnlyClientPool, clientPool, api.Registry.RESTMapper(), podResource)
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if err != nil {
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t.Fatal(err)
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}
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assert.Equal(t, 1, len(gc.dependencyGraphBuilder.monitors))
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}
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// fakeAction records information about requests to aid in testing.
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type fakeAction struct {
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method string
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path string
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query string
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}
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// String returns method=path to aid in testing
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func (f *fakeAction) String() string {
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return strings.Join([]string{f.method, f.path}, "=")
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}
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type FakeResponse struct {
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statusCode int
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content []byte
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}
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// fakeActionHandler holds a list of fakeActions received
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type fakeActionHandler struct {
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// statusCode and content returned by this handler for different method + path.
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response map[string]FakeResponse
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lock sync.Mutex
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actions []fakeAction
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}
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// ServeHTTP logs the action that occurred and always returns the associated status code
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func (f *fakeActionHandler) ServeHTTP(response http.ResponseWriter, request *http.Request) {
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f.lock.Lock()
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defer f.lock.Unlock()
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f.actions = append(f.actions, fakeAction{method: request.Method, path: request.URL.Path, query: request.URL.RawQuery})
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fakeResponse, ok := f.response[request.Method+request.URL.Path]
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if !ok {
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fakeResponse.statusCode = 200
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fakeResponse.content = []byte("{\"kind\": \"List\"}")
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}
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response.Header().Set("Content-Type", "application/json")
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response.WriteHeader(fakeResponse.statusCode)
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response.Write(fakeResponse.content)
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}
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// testServerAndClientConfig returns a server that listens and a config that can reference it
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func testServerAndClientConfig(handler func(http.ResponseWriter, *http.Request)) (*httptest.Server, *restclient.Config) {
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srv := httptest.NewServer(http.HandlerFunc(handler))
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config := &restclient.Config{
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Host: srv.URL,
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}
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return srv, config
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}
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func setupGC(t *testing.T, config *restclient.Config) *GarbageCollector {
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config.ContentConfig.NegotiatedSerializer = serializer.DirectCodecFactory{CodecFactory: metaonly.NewMetadataCodecFactory()}
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metaOnlyClientPool := dynamic.NewClientPool(config, api.Registry.RESTMapper(), dynamic.LegacyAPIPathResolverFunc)
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config.ContentConfig.NegotiatedSerializer = nil
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clientPool := dynamic.NewClientPool(config, api.Registry.RESTMapper(), dynamic.LegacyAPIPathResolverFunc)
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podResource := map[schema.GroupVersionResource]struct{}{schema.GroupVersionResource{Version: "v1", Resource: "pods"}: {}}
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gc, err := NewGarbageCollector(metaOnlyClientPool, clientPool, api.Registry.RESTMapper(), podResource)
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if err != nil {
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t.Fatal(err)
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}
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return gc
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}
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func getPod(podName string, ownerReferences []metav1.OwnerReference) *v1.Pod {
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return &v1.Pod{
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TypeMeta: metav1.TypeMeta{
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Kind: "Pod",
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APIVersion: "v1",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Namespace: "ns1",
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OwnerReferences: ownerReferences,
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},
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}
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}
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func serilizeOrDie(t *testing.T, object interface{}) []byte {
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data, err := json.Marshal(object)
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if err != nil {
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t.Fatal(err)
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}
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return data
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}
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// test the attemptToDeleteItem function making the expected actions.
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func TestAttemptToDeleteItem(t *testing.T) {
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pod := getPod("ToBeDeletedPod", []metav1.OwnerReference{
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{
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Kind: "ReplicationController",
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Name: "owner1",
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UID: "123",
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APIVersion: "v1",
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},
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})
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testHandler := &fakeActionHandler{
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response: map[string]FakeResponse{
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"GET" + "/api/v1/namespaces/ns1/replicationcontrollers/owner1": {
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404,
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[]byte{},
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},
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"GET" + "/api/v1/namespaces/ns1/pods/ToBeDeletedPod": {
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200,
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serilizeOrDie(t, pod),
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},
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},
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}
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srv, clientConfig := testServerAndClientConfig(testHandler.ServeHTTP)
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defer srv.Close()
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gc := setupGC(t, clientConfig)
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item := &node{
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identity: objectReference{
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OwnerReference: metav1.OwnerReference{
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Kind: pod.Kind,
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APIVersion: pod.APIVersion,
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Name: pod.Name,
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UID: pod.UID,
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},
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Namespace: pod.Namespace,
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},
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// owners are intentionally left empty. The attemptToDeleteItem routine should get the latest item from the server.
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owners: nil,
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}
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err := gc.attemptToDeleteItem(item)
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if err != nil {
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t.Errorf("Unexpected Error: %v", err)
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}
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expectedActionSet := sets.NewString()
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expectedActionSet.Insert("GET=/api/v1/namespaces/ns1/replicationcontrollers/owner1")
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expectedActionSet.Insert("DELETE=/api/v1/namespaces/ns1/pods/ToBeDeletedPod")
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expectedActionSet.Insert("GET=/api/v1/namespaces/ns1/pods/ToBeDeletedPod")
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actualActionSet := sets.NewString()
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for _, action := range testHandler.actions {
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actualActionSet.Insert(action.String())
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}
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if !expectedActionSet.Equal(actualActionSet) {
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t.Errorf("expected actions:\n%v\n but got:\n%v\nDifference:\n%v", expectedActionSet,
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actualActionSet, expectedActionSet.Difference(actualActionSet))
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}
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}
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// verifyGraphInvariants verifies that all of a node's owners list the node as a
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// dependent and vice versa. uidToNode has all the nodes in the graph.
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func verifyGraphInvariants(scenario string, uidToNode map[types.UID]*node, t *testing.T) {
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for myUID, node := range uidToNode {
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for dependentNode := range node.dependents {
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found := false
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for _, owner := range dependentNode.owners {
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if owner.UID == myUID {
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found = true
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break
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}
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}
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if !found {
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t.Errorf("scenario: %s: node %s has node %s as a dependent, but it's not present in the latter node's owners list", scenario, node.identity, dependentNode.identity)
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}
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}
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for _, owner := range node.owners {
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ownerNode, ok := uidToNode[owner.UID]
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if !ok {
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// It's possible that the owner node doesn't exist
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continue
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}
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if _, ok := ownerNode.dependents[node]; !ok {
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t.Errorf("node %s has node %s as an owner, but it's not present in the latter node's dependents list", node.identity, ownerNode.identity)
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}
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}
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}
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}
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func createEvent(eventType eventType, selfUID string, owners []string) event {
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var ownerReferences []metav1.OwnerReference
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for i := 0; i < len(owners); i++ {
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ownerReferences = append(ownerReferences, metav1.OwnerReference{UID: types.UID(owners[i])})
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}
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return event{
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eventType: eventType,
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obj: &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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UID: types.UID(selfUID),
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OwnerReferences: ownerReferences,
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},
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},
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}
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}
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func TestProcessEvent(t *testing.T) {
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var testScenarios = []struct {
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name string
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// a series of events that will be supplied to the
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// GraphBuilder.eventQueue.
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events []event
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}{
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{
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name: "test1",
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events: []event{
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createEvent(addEvent, "1", []string{}),
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createEvent(addEvent, "2", []string{"1"}),
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createEvent(addEvent, "3", []string{"1", "2"}),
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},
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},
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{
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name: "test2",
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events: []event{
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createEvent(addEvent, "1", []string{}),
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createEvent(addEvent, "2", []string{"1"}),
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createEvent(addEvent, "3", []string{"1", "2"}),
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createEvent(addEvent, "4", []string{"2"}),
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createEvent(deleteEvent, "2", []string{"doesn't matter"}),
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},
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},
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{
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name: "test3",
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events: []event{
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createEvent(addEvent, "1", []string{}),
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createEvent(addEvent, "2", []string{"1"}),
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createEvent(addEvent, "3", []string{"1", "2"}),
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createEvent(addEvent, "4", []string{"3"}),
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createEvent(updateEvent, "2", []string{"4"}),
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},
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},
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{
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name: "reverse test2",
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events: []event{
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createEvent(addEvent, "4", []string{"2"}),
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createEvent(addEvent, "3", []string{"1", "2"}),
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createEvent(addEvent, "2", []string{"1"}),
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createEvent(addEvent, "1", []string{}),
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createEvent(deleteEvent, "2", []string{"doesn't matter"}),
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},
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},
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}
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for _, scenario := range testScenarios {
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dependencyGraphBuilder := &GraphBuilder{
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graphChanges: workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
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uidToNode: &concurrentUIDToNode{
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uidToNodeLock: sync.RWMutex{},
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uidToNode: make(map[types.UID]*node),
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},
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attemptToDelete: workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
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absentOwnerCache: NewUIDCache(2),
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}
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for i := 0; i < len(scenario.events); i++ {
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dependencyGraphBuilder.graphChanges.Add(&scenario.events[i])
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dependencyGraphBuilder.processGraphChanges()
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verifyGraphInvariants(scenario.name, dependencyGraphBuilder.uidToNode.uidToNode, t)
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}
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}
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}
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// TestDependentsRace relies on golang's data race detector to check if there is
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// data race among in the dependents field.
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func TestDependentsRace(t *testing.T) {
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gc := setupGC(t, &restclient.Config{})
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const updates = 100
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owner := &node{dependents: make(map[*node]struct{})}
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ownerUID := types.UID("owner")
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gc.dependencyGraphBuilder.uidToNode.Write(owner)
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go func() {
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for i := 0; i < updates; i++ {
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dependent := &node{}
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gc.dependencyGraphBuilder.addDependentToOwners(dependent, []metav1.OwnerReference{{UID: ownerUID}})
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gc.dependencyGraphBuilder.removeDependentFromOwners(dependent, []metav1.OwnerReference{{UID: ownerUID}})
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}
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}()
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go func() {
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gc.attemptToOrphan.Add(owner)
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for i := 0; i < updates; i++ {
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gc.attemptToOrphanWorker()
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}
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}()
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}
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// test the list and watch functions correctly converts the ListOptions
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func TestGCListWatcher(t *testing.T) {
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testHandler := &fakeActionHandler{}
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srv, clientConfig := testServerAndClientConfig(testHandler.ServeHTTP)
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defer srv.Close()
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clientPool := dynamic.NewClientPool(clientConfig, api.Registry.RESTMapper(), dynamic.LegacyAPIPathResolverFunc)
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podResource := schema.GroupVersionResource{Version: "v1", Resource: "pods"}
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client, err := clientPool.ClientForGroupVersionResource(podResource)
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if err != nil {
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t.Fatal(err)
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}
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lw := listWatcher(client, podResource)
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if _, err := lw.Watch(metav1.ListOptions{ResourceVersion: "1"}); err != nil {
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t.Fatal(err)
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}
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if _, err := lw.List(metav1.ListOptions{ResourceVersion: "1"}); err != nil {
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t.Fatal(err)
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}
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if e, a := 2, len(testHandler.actions); e != a {
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t.Errorf("expect %d requests, got %d", e, a)
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}
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if e, a := "resourceVersion=1&watch=true", testHandler.actions[0].query; e != a {
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t.Errorf("expect %s, got %s", e, a)
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}
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if e, a := "resourceVersion=1", testHandler.actions[1].query; e != a {
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t.Errorf("expect %s, got %s", e, a)
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}
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}
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func podToGCNode(pod *v1.Pod) *node {
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return &node{
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identity: objectReference{
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OwnerReference: metav1.OwnerReference{
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Kind: pod.Kind,
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APIVersion: pod.APIVersion,
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Name: pod.Name,
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UID: pod.UID,
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},
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Namespace: pod.Namespace,
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},
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// owners are intentionally left empty. The attemptToDeleteItem routine should get the latest item from the server.
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owners: nil,
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}
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}
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func TestAbsentUIDCache(t *testing.T) {
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rc1Pod1 := getPod("rc1Pod1", []metav1.OwnerReference{
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{
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Kind: "ReplicationController",
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Name: "rc1",
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UID: "1",
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APIVersion: "v1",
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},
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})
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rc1Pod2 := getPod("rc1Pod2", []metav1.OwnerReference{
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{
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Kind: "ReplicationController",
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Name: "rc1",
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UID: "1",
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APIVersion: "v1",
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},
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})
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rc2Pod1 := getPod("rc2Pod1", []metav1.OwnerReference{
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{
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Kind: "ReplicationController",
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Name: "rc2",
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UID: "2",
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APIVersion: "v1",
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},
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})
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rc3Pod1 := getPod("rc3Pod1", []metav1.OwnerReference{
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{
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Kind: "ReplicationController",
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Name: "rc3",
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UID: "3",
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APIVersion: "v1",
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},
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})
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testHandler := &fakeActionHandler{
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response: map[string]FakeResponse{
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"GET" + "/api/v1/namespaces/ns1/pods/rc1Pod1": {
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200,
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serilizeOrDie(t, rc1Pod1),
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},
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"GET" + "/api/v1/namespaces/ns1/pods/rc1Pod2": {
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200,
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serilizeOrDie(t, rc1Pod2),
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},
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"GET" + "/api/v1/namespaces/ns1/pods/rc2Pod1": {
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200,
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serilizeOrDie(t, rc2Pod1),
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},
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"GET" + "/api/v1/namespaces/ns1/pods/rc3Pod1": {
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200,
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serilizeOrDie(t, rc3Pod1),
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},
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"GET" + "/api/v1/namespaces/ns1/replicationcontrollers/rc1": {
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404,
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[]byte{},
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},
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"GET" + "/api/v1/namespaces/ns1/replicationcontrollers/rc2": {
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404,
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[]byte{},
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},
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"GET" + "/api/v1/namespaces/ns1/replicationcontrollers/rc3": {
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404,
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[]byte{},
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},
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},
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}
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srv, clientConfig := testServerAndClientConfig(testHandler.ServeHTTP)
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defer srv.Close()
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gc := setupGC(t, clientConfig)
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gc.absentOwnerCache = NewUIDCache(2)
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gc.attemptToDeleteItem(podToGCNode(rc1Pod1))
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gc.attemptToDeleteItem(podToGCNode(rc2Pod1))
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// rc1 should already be in the cache, no request should be sent. rc1 should be promoted in the UIDCache
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gc.attemptToDeleteItem(podToGCNode(rc1Pod2))
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// after this call, rc2 should be evicted from the UIDCache
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gc.attemptToDeleteItem(podToGCNode(rc3Pod1))
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// check cache
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if !gc.absentOwnerCache.Has(types.UID("1")) {
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t.Errorf("expected rc1 to be in the cache")
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}
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if gc.absentOwnerCache.Has(types.UID("2")) {
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t.Errorf("expected rc2 to not exist in the cache")
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}
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if !gc.absentOwnerCache.Has(types.UID("3")) {
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t.Errorf("expected rc3 to be in the cache")
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}
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// check the request sent to the server
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count := 0
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for _, action := range testHandler.actions {
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if action.String() == "GET=/api/v1/namespaces/ns1/replicationcontrollers/rc1" {
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count++
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}
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}
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if count != 1 {
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t.Errorf("expected only 1 GET rc1 request, got %d", count)
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}
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}
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func TestDeleteOwnerRefPatch(t *testing.T) {
|
|
original := v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
UID: "100",
|
|
OwnerReferences: []metav1.OwnerReference{
|
|
{UID: "1"},
|
|
{UID: "2"},
|
|
{UID: "3"},
|
|
},
|
|
},
|
|
}
|
|
originalData := serilizeOrDie(t, original)
|
|
expected := v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
UID: "100",
|
|
OwnerReferences: []metav1.OwnerReference{
|
|
{UID: "1"},
|
|
},
|
|
},
|
|
}
|
|
patch := deleteOwnerRefPatch("100", "2", "3")
|
|
patched, err := strategicpatch.StrategicMergePatch(originalData, patch, v1.Pod{})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
var got v1.Pod
|
|
if err := json.Unmarshal(patched, &got); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if !reflect.DeepEqual(expected, got) {
|
|
t.Errorf("expected: %#v,\ngot: %#v", expected, got)
|
|
}
|
|
}
|
|
|
|
func TestUnblockOwnerReference(t *testing.T) {
|
|
trueVar := true
|
|
falseVar := false
|
|
original := v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
UID: "100",
|
|
OwnerReferences: []metav1.OwnerReference{
|
|
{UID: "1", BlockOwnerDeletion: &trueVar},
|
|
{UID: "2", BlockOwnerDeletion: &falseVar},
|
|
{UID: "3"},
|
|
},
|
|
},
|
|
}
|
|
originalData := serilizeOrDie(t, original)
|
|
expected := v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
UID: "100",
|
|
OwnerReferences: []metav1.OwnerReference{
|
|
{UID: "1", BlockOwnerDeletion: &falseVar},
|
|
{UID: "2", BlockOwnerDeletion: &falseVar},
|
|
{UID: "3"},
|
|
},
|
|
},
|
|
}
|
|
accessor, err := meta.Accessor(&original)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
n := node{
|
|
owners: accessor.GetOwnerReferences(),
|
|
}
|
|
patch, err := n.patchToUnblockOwnerReferences()
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
patched, err := strategicpatch.StrategicMergePatch(originalData, patch, v1.Pod{})
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
var got v1.Pod
|
|
if err := json.Unmarshal(patched, &got); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if !reflect.DeepEqual(expected, got) {
|
|
t.Errorf("expected: %#v,\ngot: %#v", expected, got)
|
|
t.Errorf("expected: %#v,\ngot: %#v", expected.OwnerReferences, got.OwnerReferences)
|
|
for _, ref := range got.OwnerReferences {
|
|
t.Errorf("ref.UID=%s, ref.BlockOwnerDeletion=%v", ref.UID, *ref.BlockOwnerDeletion)
|
|
}
|
|
}
|
|
}
|