mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
81 lines
2.9 KiB
Go
81 lines
2.9 KiB
Go
/*
|
|
Copyright 2018 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package admission
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"net/http"
|
|
"time"
|
|
|
|
"k8s.io/klog/v2"
|
|
|
|
utilwait "k8s.io/apimachinery/pkg/util/wait"
|
|
"k8s.io/apiserver/pkg/admission"
|
|
webhookinit "k8s.io/apiserver/pkg/admission/plugin/webhook/initializer"
|
|
genericapiserver "k8s.io/apiserver/pkg/server"
|
|
egressselector "k8s.io/apiserver/pkg/server/egressselector"
|
|
"k8s.io/apiserver/pkg/util/webhook"
|
|
cacheddiscovery "k8s.io/client-go/discovery/cached/memory"
|
|
externalinformers "k8s.io/client-go/informers"
|
|
"k8s.io/client-go/kubernetes"
|
|
"k8s.io/client-go/rest"
|
|
"k8s.io/client-go/restmapper"
|
|
quotainstall "k8s.io/kubernetes/pkg/quota/v1/install"
|
|
)
|
|
|
|
// Config holds the configuration needed to for initialize the admission plugins
|
|
type Config struct {
|
|
CloudConfigFile string
|
|
LoopbackClientConfig *rest.Config
|
|
ExternalInformers externalinformers.SharedInformerFactory
|
|
}
|
|
|
|
// New sets up the plugins and admission start hooks needed for admission
|
|
func (c *Config) New(proxyTransport *http.Transport, egressSelector *egressselector.EgressSelector, serviceResolver webhook.ServiceResolver) ([]admission.PluginInitializer, genericapiserver.PostStartHookFunc, error) {
|
|
webhookAuthResolverWrapper := webhook.NewDefaultAuthenticationInfoResolverWrapper(proxyTransport, egressSelector, c.LoopbackClientConfig)
|
|
webhookPluginInitializer := webhookinit.NewPluginInitializer(webhookAuthResolverWrapper, serviceResolver)
|
|
|
|
var cloudConfig []byte
|
|
if c.CloudConfigFile != "" {
|
|
var err error
|
|
cloudConfig, err = ioutil.ReadFile(c.CloudConfigFile)
|
|
if err != nil {
|
|
klog.Fatalf("Error reading from cloud configuration file %s: %#v", c.CloudConfigFile, err)
|
|
}
|
|
}
|
|
clientset, err := kubernetes.NewForConfig(c.LoopbackClientConfig)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
discoveryClient := cacheddiscovery.NewMemCacheClient(clientset.Discovery())
|
|
discoveryRESTMapper := restmapper.NewDeferredDiscoveryRESTMapper(discoveryClient)
|
|
kubePluginInitializer := NewPluginInitializer(
|
|
cloudConfig,
|
|
discoveryRESTMapper,
|
|
quotainstall.NewQuotaConfigurationForAdmission(),
|
|
)
|
|
|
|
admissionPostStartHook := func(context genericapiserver.PostStartHookContext) error {
|
|
discoveryRESTMapper.Reset()
|
|
go utilwait.Until(discoveryRESTMapper.Reset, 30*time.Second, context.StopCh)
|
|
return nil
|
|
}
|
|
|
|
return []admission.PluginInitializer{webhookPluginInitializer, kubePluginInitializer}, admissionPostStartHook, nil
|
|
}
|