242 lines
9.4 KiB
Go
242 lines
9.4 KiB
Go
/*
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Copyright 2014 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 app does all of the work necessary to create a Kubernetes
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// APIServer by binding together the API, master and APIServer infrastructure.
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// It can be configured and called directly or via the hyperkube cache.
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package app
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import (
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"fmt"
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"strings"
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"time"
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"github.com/golang/glog"
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"github.com/pborman/uuid"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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"k8s.io/apimachinery/pkg/runtime/schema"
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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/apiserver/pkg/admission"
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"k8s.io/kubernetes/federation/cmd/federation-apiserver/app/options"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
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"k8s.io/kubernetes/pkg/controller/informers"
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"k8s.io/kubernetes/pkg/generated/openapi"
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"k8s.io/kubernetes/pkg/genericapiserver/registry/generic"
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genericregistry "k8s.io/kubernetes/pkg/genericapiserver/registry/generic/registry"
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genericapiserver "k8s.io/kubernetes/pkg/genericapiserver/server"
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"k8s.io/kubernetes/pkg/genericapiserver/server/filters"
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"k8s.io/kubernetes/pkg/kubeapiserver"
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kubeapiserveradmission "k8s.io/kubernetes/pkg/kubeapiserver/admission"
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"k8s.io/kubernetes/pkg/registry/cachesize"
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"k8s.io/kubernetes/pkg/routes"
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"k8s.io/kubernetes/pkg/version"
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)
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// NewAPIServerCommand creates a *cobra.Command object with default parameters
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func NewAPIServerCommand() *cobra.Command {
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s := options.NewServerRunOptions()
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s.AddFlags(pflag.CommandLine)
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cmd := &cobra.Command{
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Use: "federation-apiserver",
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Long: `The Kubernetes federation API server validates and configures data
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for the api objects which include pods, services, replicationcontrollers, and
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others. The API Server services REST operations and provides the frontend to the
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cluster's shared state through which all other components interact.`,
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Run: func(cmd *cobra.Command, args []string) {
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},
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}
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return cmd
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}
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// Run runs the specified APIServer. This should never exit.
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func Run(s *options.ServerRunOptions) error {
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// set defaults
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if err := s.GenericServerRunOptions.DefaultAdvertiseAddress(s.SecureServing, s.InsecureServing); err != nil {
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return err
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}
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if err := s.SecureServing.MaybeDefaultWithSelfSignedCerts(s.GenericServerRunOptions.AdvertiseAddress.String()); err != nil {
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return fmt.Errorf("error creating self-signed certificates: %v", err)
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}
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if err := s.CloudProvider.DefaultExternalHost(s.GenericServerRunOptions); err != nil {
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return fmt.Errorf("error setting the external host value: %v", err)
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}
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s.Authentication.ApplyAuthorization(s.Authorization)
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// validate options
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if errs := s.Validate(); len(errs) != 0 {
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return utilerrors.NewAggregate(errs)
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}
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genericConfig := genericapiserver.NewConfig(). // create the new config
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ApplyOptions(s.GenericServerRunOptions). // apply the options selected
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ApplyInsecureServingOptions(s.InsecureServing)
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if _, err := genericConfig.ApplySecureServingOptions(s.SecureServing); err != nil {
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return fmt.Errorf("failed to configure https: %s", err)
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}
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if err := s.Authentication.Apply(genericConfig); err != nil {
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return fmt.Errorf("failed to configure authentication: %s", err)
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}
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// TODO: register cluster federation resources here.
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resourceConfig := genericapiserver.NewResourceConfig()
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if s.Etcd.StorageConfig.DeserializationCacheSize == 0 {
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// When size of cache is not explicitly set, set it to 50000
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s.Etcd.StorageConfig.DeserializationCacheSize = 50000
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}
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storageGroupsToEncodingVersion, err := s.GenericServerRunOptions.StorageGroupsToEncodingVersion()
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if err != nil {
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return fmt.Errorf("error generating storage version map: %s", err)
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}
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storageFactory, err := kubeapiserver.BuildDefaultStorageFactory(
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s.Etcd.StorageConfig, s.GenericServerRunOptions.DefaultStorageMediaType, api.Codecs,
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genericapiserver.NewDefaultResourceEncodingConfig(), storageGroupsToEncodingVersion,
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[]schema.GroupVersionResource{}, resourceConfig, s.GenericServerRunOptions.RuntimeConfig)
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if err != nil {
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return fmt.Errorf("error in initializing storage factory: %s", err)
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}
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for _, override := range s.Etcd.EtcdServersOverrides {
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tokens := strings.Split(override, "#")
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if len(tokens) != 2 {
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glog.Errorf("invalid value of etcd server overrides: %s", override)
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continue
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}
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apiresource := strings.Split(tokens[0], "/")
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if len(apiresource) != 2 {
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glog.Errorf("invalid resource definition: %s", tokens[0])
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continue
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}
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group := apiresource[0]
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resource := apiresource[1]
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groupResource := schema.GroupResource{Group: group, Resource: resource}
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servers := strings.Split(tokens[1], ";")
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storageFactory.SetEtcdLocation(groupResource, servers)
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}
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apiAuthenticator, securityDefinitions, err := s.Authentication.ToAuthenticationConfig().New()
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if err != nil {
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return fmt.Errorf("invalid Authentication Config: %v", err)
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}
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privilegedLoopbackToken := uuid.NewRandom().String()
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selfClientConfig, err := genericapiserver.NewSelfClientConfig(genericConfig.SecureServingInfo, genericConfig.InsecureServingInfo, privilegedLoopbackToken)
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if err != nil {
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return fmt.Errorf("failed to create clientset: %v", err)
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}
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client, err := internalclientset.NewForConfig(selfClientConfig)
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if err != nil {
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return fmt.Errorf("failed to create clientset: %v", err)
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}
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sharedInformers := informers.NewSharedInformerFactory(nil, client, 10*time.Minute)
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authorizationConfig := s.Authorization.ToAuthorizationConfig(sharedInformers)
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apiAuthorizer, err := authorizationConfig.New()
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if err != nil {
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return fmt.Errorf("invalid Authorization Config: %v", err)
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}
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admissionControlPluginNames := strings.Split(s.GenericServerRunOptions.AdmissionControl, ",")
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pluginInitializer := kubeapiserveradmission.NewPluginInitializer(client, sharedInformers, apiAuthorizer)
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admissionConfigProvider, err := kubeapiserveradmission.ReadAdmissionConfiguration(admissionControlPluginNames, s.GenericServerRunOptions.AdmissionControlConfigFile)
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if err != nil {
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return fmt.Errorf("failed to read plugin config: %v", err)
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}
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admissionController, err := admission.NewFromPlugins(admissionControlPluginNames, admissionConfigProvider, pluginInitializer)
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if err != nil {
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return fmt.Errorf("failed to initialize plugins: %v", err)
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}
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kubeVersion := version.Get()
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genericConfig.Version = &kubeVersion
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genericConfig.LoopbackClientConfig = selfClientConfig
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genericConfig.Authenticator = apiAuthenticator
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genericConfig.Authorizer = apiAuthorizer
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genericConfig.AdmissionControl = admissionController
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genericConfig.OpenAPIConfig = genericapiserver.DefaultOpenAPIConfig(openapi.OpenAPIDefinitions)
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genericConfig.OpenAPIConfig.SecurityDefinitions = securityDefinitions
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genericConfig.SwaggerConfig = genericapiserver.DefaultSwaggerConfig()
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genericConfig.LongRunningFunc = filters.BasicLongRunningRequestCheck(
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sets.NewString("watch", "proxy"),
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sets.NewString("attach", "exec", "proxy", "log", "portforward"),
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)
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// TODO: Move this to generic api server (Need to move the command line flag).
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if s.GenericServerRunOptions.EnableWatchCache {
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cachesize.InitializeWatchCacheSizes(s.GenericServerRunOptions.TargetRAMMB)
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cachesize.SetWatchCacheSizes(s.GenericServerRunOptions.WatchCacheSizes)
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}
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m, err := genericConfig.Complete().New()
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if err != nil {
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return err
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}
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routes.UIRedirect{}.Install(m.HandlerContainer)
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routes.Logs{}.Install(m.HandlerContainer)
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// TODO: Refactor this code to share it with kube-apiserver rather than duplicating it here.
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restOptionsFactory := &restOptionsFactory{
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storageFactory: storageFactory,
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enableGarbageCollection: s.GenericServerRunOptions.EnableGarbageCollection,
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deleteCollectionWorkers: s.GenericServerRunOptions.DeleteCollectionWorkers,
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}
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if s.GenericServerRunOptions.EnableWatchCache {
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restOptionsFactory.storageDecorator = genericregistry.StorageWithCacher
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} else {
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restOptionsFactory.storageDecorator = generic.UndecoratedStorage
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}
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installFederationAPIs(m, restOptionsFactory)
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installCoreAPIs(s, m, restOptionsFactory)
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installExtensionsAPIs(m, restOptionsFactory)
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installBatchAPIs(m, restOptionsFactory)
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installAutoscalingAPIs(m, restOptionsFactory)
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sharedInformers.Start(wait.NeverStop)
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m.PrepareRun().Run(wait.NeverStop)
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return nil
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}
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type restOptionsFactory struct {
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storageFactory genericapiserver.StorageFactory
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storageDecorator generic.StorageDecorator
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deleteCollectionWorkers int
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enableGarbageCollection bool
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}
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func (f *restOptionsFactory) GetRESTOptions(resource schema.GroupResource) (generic.RESTOptions, error) {
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config, err := f.storageFactory.NewConfig(resource)
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if err != nil {
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return generic.RESTOptions{}, fmt.Errorf("Unable to find storage config for %v, due to %v", resource, err.Error())
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}
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return generic.RESTOptions{
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StorageConfig: config,
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Decorator: f.storageDecorator,
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DeleteCollectionWorkers: f.deleteCollectionWorkers,
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EnableGarbageCollection: f.enableGarbageCollection,
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ResourcePrefix: f.storageFactory.ResourcePrefix(resource),
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}, nil
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}
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