mirror of
https://github.com/ceph/ceph-csi.git
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81 lines
2.8 KiB
Go
81 lines
2.8 KiB
Go
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/*
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Copyright 2018 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 admission
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import (
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"io/ioutil"
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"net/http"
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"time"
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"k8s.io/klog"
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utilwait "k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/apiserver/pkg/admission"
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webhookinit "k8s.io/apiserver/pkg/admission/plugin/webhook/initializer"
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"k8s.io/apiserver/pkg/server"
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genericapiserver "k8s.io/apiserver/pkg/server"
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"k8s.io/apiserver/pkg/util/webhook"
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cacheddiscovery "k8s.io/client-go/discovery/cached"
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externalinformers "k8s.io/client-go/informers"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/restmapper"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
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quotainstall "k8s.io/kubernetes/pkg/quota/v1/install"
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)
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// Config holds the configuration needed to for initialize the admission plugins
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type Config struct {
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CloudConfigFile string
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LoopbackClientConfig *rest.Config
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ExternalInformers externalinformers.SharedInformerFactory
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}
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// New sets up the plugins and admission start hooks needed for admission
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func (c *Config) New(proxyTransport *http.Transport, serviceResolver webhook.ServiceResolver) ([]admission.PluginInitializer, server.PostStartHookFunc, error) {
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webhookAuthResolverWrapper := webhook.NewDefaultAuthenticationInfoResolverWrapper(proxyTransport, c.LoopbackClientConfig)
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webhookPluginInitializer := webhookinit.NewPluginInitializer(webhookAuthResolverWrapper, serviceResolver)
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var cloudConfig []byte
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if c.CloudConfigFile != "" {
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var err error
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cloudConfig, err = ioutil.ReadFile(c.CloudConfigFile)
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if err != nil {
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klog.Fatalf("Error reading from cloud configuration file %s: %#v", c.CloudConfigFile, err)
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}
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}
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internalClient, err := internalclientset.NewForConfig(c.LoopbackClientConfig)
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if err != nil {
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return nil, nil, err
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}
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discoveryClient := cacheddiscovery.NewMemCacheClient(internalClient.Discovery())
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discoveryRESTMapper := restmapper.NewDeferredDiscoveryRESTMapper(discoveryClient)
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kubePluginInitializer := NewPluginInitializer(
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cloudConfig,
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discoveryRESTMapper,
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quotainstall.NewQuotaConfigurationForAdmission(),
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)
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admissionPostStartHook := func(context genericapiserver.PostStartHookContext) error {
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discoveryRESTMapper.Reset()
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go utilwait.Until(discoveryRESTMapper.Reset, 30*time.Second, context.StopCh)
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return nil
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}
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return []admission.PluginInitializer{webhookPluginInitializer, kubePluginInitializer}, admissionPostStartHook, nil
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}
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