k8s.io/apiserver@v0.31.1/pkg/admission/initializer/initializer.go (about) 1 /* 2 Copyright 2017 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 initializer 18 19 import ( 20 "k8s.io/apimachinery/pkg/api/meta" 21 "k8s.io/apiserver/pkg/admission" 22 "k8s.io/apiserver/pkg/authorization/authorizer" 23 "k8s.io/client-go/dynamic" 24 "k8s.io/client-go/informers" 25 "k8s.io/client-go/kubernetes" 26 "k8s.io/component-base/featuregate" 27 ) 28 29 type pluginInitializer struct { 30 externalClient kubernetes.Interface 31 dynamicClient dynamic.Interface 32 externalInformers informers.SharedInformerFactory 33 authorizer authorizer.Authorizer 34 featureGates featuregate.FeatureGate 35 stopCh <-chan struct{} 36 restMapper meta.RESTMapper 37 } 38 39 // New creates an instance of admission plugins initializer. 40 // This constructor is public with a long param list so that callers immediately know that new information can be expected 41 // during compilation when they update a level. 42 func New( 43 extClientset kubernetes.Interface, 44 dynamicClient dynamic.Interface, 45 extInformers informers.SharedInformerFactory, 46 authz authorizer.Authorizer, 47 featureGates featuregate.FeatureGate, 48 stopCh <-chan struct{}, 49 restMapper meta.RESTMapper, 50 ) pluginInitializer { 51 return pluginInitializer{ 52 externalClient: extClientset, 53 dynamicClient: dynamicClient, 54 externalInformers: extInformers, 55 authorizer: authz, 56 featureGates: featureGates, 57 stopCh: stopCh, 58 restMapper: restMapper, 59 } 60 } 61 62 // Initialize checks the initialization interfaces implemented by a plugin 63 // and provide the appropriate initialization data 64 func (i pluginInitializer) Initialize(plugin admission.Interface) { 65 // First tell the plugin about drained notification, so it can pass it to further initializations. 66 if wants, ok := plugin.(WantsDrainedNotification); ok { 67 wants.SetDrainedNotification(i.stopCh) 68 } 69 70 // Second tell the plugin about enabled features, so it can decide whether to start informers or not 71 if wants, ok := plugin.(WantsFeatures); ok { 72 wants.InspectFeatureGates(i.featureGates) 73 } 74 75 if wants, ok := plugin.(WantsExternalKubeClientSet); ok { 76 wants.SetExternalKubeClientSet(i.externalClient) 77 } 78 79 if wants, ok := plugin.(WantsDynamicClient); ok { 80 wants.SetDynamicClient(i.dynamicClient) 81 } 82 83 if wants, ok := plugin.(WantsExternalKubeInformerFactory); ok { 84 wants.SetExternalKubeInformerFactory(i.externalInformers) 85 } 86 87 if wants, ok := plugin.(WantsAuthorizer); ok { 88 wants.SetAuthorizer(i.authorizer) 89 } 90 if wants, ok := plugin.(WantsRESTMapper); ok { 91 wants.SetRESTMapper(i.restMapper) 92 } 93 } 94 95 var _ admission.PluginInitializer = pluginInitializer{}