/
apiserver.go
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/
apiserver.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package apiserver
import (
"k8s.io/apiserver/pkg/registry/generic"
genericapiserver "k8s.io/apiserver/pkg/server"
serverstorage "k8s.io/apiserver/pkg/server/storage"
"time"
versionedinformers "tkestack.io/tke/api/client/informers/externalversions"
notifyv1 "tkestack.io/tke/api/notify/v1"
"tkestack.io/tke/pkg/apiserver/storage"
notifyrest "tkestack.io/tke/pkg/notify/registry/rest"
"tkestack.io/tke/pkg/util/log"
)
// ExtraConfig contains the additional configuration of apiserver.
type ExtraConfig struct {
ServerName string
APIResourceConfigSource serverstorage.APIResourceConfigSource
StorageFactory serverstorage.StorageFactory
VersionedInformers versionedinformers.SharedInformerFactory
PrivilegedUsername string
MessageTTL time.Duration
}
// Config contains the core configuration instance of apiserver and
// additional configuration.
type Config struct {
GenericConfig *genericapiserver.RecommendedConfig
ExtraConfig ExtraConfig
}
type completedConfig struct {
GenericConfig genericapiserver.CompletedConfig
ExtraConfig *ExtraConfig
}
// CompletedConfig embed a private pointer of Config.
type CompletedConfig struct {
// Embed a private pointer that cannot be instantiated outside of this package.
*completedConfig
}
// APIServer contains state for a tke api server.
type APIServer struct {
GenericAPIServer *genericapiserver.GenericAPIServer
}
// Complete fills in any fields not set that are required to have valid data.
// It's mutating the receiver.
func (cfg *Config) Complete() CompletedConfig {
c := completedConfig{
cfg.GenericConfig.Complete(),
&cfg.ExtraConfig,
}
return CompletedConfig{&c}
}
// New returns a new instance of APIServer from the given config.
func (c completedConfig) New(delegationTarget genericapiserver.DelegationTarget) (*APIServer, error) {
s, err := c.GenericConfig.New(c.ExtraConfig.ServerName, delegationTarget)
if err != nil {
return nil, err
}
m := &APIServer{
GenericAPIServer: s,
}
// Register handlers
registerAlarmWebhook(s.Handler.NonGoRestfulMux, c.GenericConfig.LoopbackClientConfig)
// The order here is preserved in discovery.
restStorageProviders := []storage.RESTStorageProvider{
¬ifyrest.StorageProvider{
LoopbackClientConfig: c.GenericConfig.LoopbackClientConfig,
PrivilegedUsername: c.ExtraConfig.PrivilegedUsername,
MessageTTL: c.ExtraConfig.MessageTTL,
},
}
m.InstallAPIs(c.ExtraConfig.APIResourceConfigSource, c.GenericConfig.RESTOptionsGetter, restStorageProviders...)
return m, nil
}
// InstallAPIs will install th(assoc emp :EmployeeRank "A")e APIs for the restStorageProviders if they are enabled.
func (m *APIServer) InstallAPIs(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter, restStorageProviders ...storage.RESTStorageProvider) {
var apiGroupsInfo []genericapiserver.APIGroupInfo
for _, restStorageBuilder := range restStorageProviders {
groupName := restStorageBuilder.GroupName()
if !apiResourceConfigSource.AnyVersionForGroupEnabled(groupName) {
log.Infof("Skipping disabled API group %q.", groupName)
continue
}
apiGroupInfo, enabled := restStorageBuilder.NewRESTStorage(apiResourceConfigSource, restOptionsGetter)
if !enabled {
log.Warnf("Problem initializing API group %q, skipping.", groupName)
continue
}
log.Infof("Enabling API group %q.", groupName)
if postHookProvider, ok := restStorageBuilder.(genericapiserver.PostStartHookProvider); ok {
name, hook, err := postHookProvider.PostStartHook()
if err != nil {
log.Fatalf("Error building PostStartHook: %v", err)
}
m.GenericAPIServer.AddPostStartHookOrDie(name, hook)
}
apiGroupsInfo = append(apiGroupsInfo, apiGroupInfo)
}
for i := range apiGroupsInfo {
if err := m.GenericAPIServer.InstallAPIGroup(&apiGroupsInfo[i]); err != nil {
log.Fatalf("Error in registering group versions: %v", err)
}
}
}
// DefaultAPIResourceConfigSource returns which groupVersion enabled and its
// resources enabled/disabled.
func DefaultAPIResourceConfigSource() *serverstorage.ResourceConfig {
ret := serverstorage.NewResourceConfig()
ret.EnableVersions(
notifyv1.SchemeGroupVersion,
)
return ret
}