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server.go
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server.go
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/*
Copyright 2014 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 app does all of the work necessary to create a Kubernetes
// APIServer by binding together the API, master and APIServer infrastructure.
// It can be configured and called directly or via the hyperkube cache.
package app
import (
"strings"
"time"
"github.com/golang/glog"
"github.com/pborman/uuid"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"k8s.io/kubernetes/federation/cmd/federation-apiserver/app/options"
"k8s.io/kubernetes/pkg/admission"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/unversioned"
"k8s.io/kubernetes/pkg/apiserver/authenticator"
authorizerunion "k8s.io/kubernetes/pkg/auth/authorizer/union"
"k8s.io/kubernetes/pkg/auth/user"
"k8s.io/kubernetes/pkg/controller/informers"
"k8s.io/kubernetes/pkg/generated/openapi"
"k8s.io/kubernetes/pkg/genericapiserver"
"k8s.io/kubernetes/pkg/genericapiserver/authorizer"
genericvalidation "k8s.io/kubernetes/pkg/genericapiserver/validation"
"k8s.io/kubernetes/pkg/registry/cachesize"
"k8s.io/kubernetes/pkg/registry/generic"
"k8s.io/kubernetes/pkg/registry/generic/registry"
"k8s.io/kubernetes/pkg/routes"
"k8s.io/kubernetes/pkg/util/wait"
"k8s.io/kubernetes/pkg/version"
authenticatorunion "k8s.io/kubernetes/plugin/pkg/auth/authenticator/request/union"
)
// NewAPIServerCommand creates a *cobra.Command object with default parameters
func NewAPIServerCommand() *cobra.Command {
s := options.NewServerRunOptions()
s.AddFlags(pflag.CommandLine)
cmd := &cobra.Command{
Use: "federation-apiserver",
Long: `The Kubernetes federation API server validates and configures data
for the api objects which include pods, services, replicationcontrollers, and
others. The API Server services REST operations and provides the frontend to the
cluster's shared state through which all other components interact.`,
Run: func(cmd *cobra.Command, args []string) {
},
}
return cmd
}
// Run runs the specified APIServer. This should never exit.
func Run(s *options.ServerRunOptions) error {
genericvalidation.VerifyEtcdServersList(s.GenericServerRunOptions)
genericapiserver.DefaultAndValidateRunOptions(s.GenericServerRunOptions)
genericConfig := genericapiserver.NewConfig(). // create the new config
ApplyOptions(s.GenericServerRunOptions). // apply the options selected
Complete() // set default values based on the known values
if err := genericConfig.MaybeGenerateServingCerts(); err != nil {
glog.Fatalf("Failed to generate service certificate: %v", err)
}
// TODO: register cluster federation resources here.
resourceConfig := genericapiserver.NewResourceConfig()
if s.GenericServerRunOptions.StorageConfig.DeserializationCacheSize == 0 {
// When size of cache is not explicitly set, set it to 50000
s.GenericServerRunOptions.StorageConfig.DeserializationCacheSize = 50000
}
storageGroupsToEncodingVersion, err := s.GenericServerRunOptions.StorageGroupsToEncodingVersion()
if err != nil {
glog.Fatalf("error generating storage version map: %s", err)
}
storageFactory, err := genericapiserver.BuildDefaultStorageFactory(
s.GenericServerRunOptions.StorageConfig, s.GenericServerRunOptions.DefaultStorageMediaType, api.Codecs,
genericapiserver.NewDefaultResourceEncodingConfig(), storageGroupsToEncodingVersion,
[]unversioned.GroupVersionResource{}, resourceConfig, s.GenericServerRunOptions.RuntimeConfig)
if err != nil {
glog.Fatalf("error in initializing storage factory: %s", err)
}
for _, override := range s.GenericServerRunOptions.EtcdServersOverrides {
tokens := strings.Split(override, "#")
if len(tokens) != 2 {
glog.Errorf("invalid value of etcd server overrides: %s", override)
continue
}
apiresource := strings.Split(tokens[0], "/")
if len(apiresource) != 2 {
glog.Errorf("invalid resource definition: %s", tokens[0])
continue
}
group := apiresource[0]
resource := apiresource[1]
groupResource := unversioned.GroupResource{Group: group, Resource: resource}
servers := strings.Split(tokens[1], ";")
storageFactory.SetEtcdLocation(groupResource, servers)
}
apiAuthenticator, securityDefinitions, err := authenticator.New(authenticator.AuthenticatorConfig{
Anonymous: s.GenericServerRunOptions.AnonymousAuth,
AnyToken: s.GenericServerRunOptions.EnableAnyToken,
BasicAuthFile: s.GenericServerRunOptions.BasicAuthFile,
ClientCAFile: s.GenericServerRunOptions.ClientCAFile,
TokenAuthFile: s.GenericServerRunOptions.TokenAuthFile,
OIDCIssuerURL: s.GenericServerRunOptions.OIDCIssuerURL,
OIDCClientID: s.GenericServerRunOptions.OIDCClientID,
OIDCCAFile: s.GenericServerRunOptions.OIDCCAFile,
OIDCUsernameClaim: s.GenericServerRunOptions.OIDCUsernameClaim,
OIDCGroupsClaim: s.GenericServerRunOptions.OIDCGroupsClaim,
KeystoneURL: s.GenericServerRunOptions.KeystoneURL,
RequestHeaderConfig: s.GenericServerRunOptions.AuthenticationRequestHeaderConfig(),
})
if err != nil {
glog.Fatalf("Invalid Authentication Config: %v", err)
}
privilegedLoopbackToken := uuid.NewRandom().String()
selfClientConfig, err := s.GenericServerRunOptions.NewSelfClientConfig(privilegedLoopbackToken)
if err != nil {
glog.Fatalf("Failed to create clientset: %v", err)
}
client, err := s.GenericServerRunOptions.NewSelfClient(privilegedLoopbackToken)
if err != nil {
glog.Errorf("Failed to create clientset: %v", err)
}
sharedInformers := informers.NewSharedInformerFactory(client, 10*time.Minute)
authorizationConfig := authorizer.AuthorizationConfig{
PolicyFile: s.GenericServerRunOptions.AuthorizationPolicyFile,
WebhookConfigFile: s.GenericServerRunOptions.AuthorizationWebhookConfigFile,
WebhookCacheAuthorizedTTL: s.GenericServerRunOptions.AuthorizationWebhookCacheAuthorizedTTL,
WebhookCacheUnauthorizedTTL: s.GenericServerRunOptions.AuthorizationWebhookCacheUnauthorizedTTL,
RBACSuperUser: s.GenericServerRunOptions.AuthorizationRBACSuperUser,
InformerFactory: sharedInformers,
}
authorizationModeNames := strings.Split(s.GenericServerRunOptions.AuthorizationMode, ",")
apiAuthorizer, err := authorizer.NewAuthorizerFromAuthorizationConfig(authorizationModeNames, authorizationConfig)
if err != nil {
glog.Fatalf("Invalid Authorization Config: %v", err)
}
admissionControlPluginNames := strings.Split(s.GenericServerRunOptions.AdmissionControl, ",")
// TODO(dims): We probably need to add an option "EnableLoopbackToken"
if apiAuthenticator != nil {
var uid = uuid.NewRandom().String()
tokens := make(map[string]*user.DefaultInfo)
tokens[privilegedLoopbackToken] = &user.DefaultInfo{
Name: user.APIServerUser,
UID: uid,
Groups: []string{user.SystemPrivilegedGroup},
}
tokenAuthenticator := authenticator.NewAuthenticatorFromTokens(tokens)
apiAuthenticator = authenticatorunion.New(tokenAuthenticator, apiAuthenticator)
tokenAuthorizer := authorizer.NewPrivilegedGroups(user.SystemPrivilegedGroup)
apiAuthorizer = authorizerunion.New(tokenAuthorizer, apiAuthorizer)
}
pluginInitializer := admission.NewPluginInitializer(sharedInformers, apiAuthorizer)
admissionController, err := admission.NewFromPlugins(client, admissionControlPluginNames, s.GenericServerRunOptions.AdmissionControlConfigFile, pluginInitializer)
if err != nil {
glog.Fatalf("Failed to initialize plugins: %v", err)
}
kubeVersion := version.Get()
genericConfig.Version = &kubeVersion
genericConfig.LoopbackClientConfig = selfClientConfig
genericConfig.Authenticator = apiAuthenticator
genericConfig.Authorizer = apiAuthorizer
genericConfig.AdmissionControl = admissionController
genericConfig.APIResourceConfigSource = storageFactory.APIResourceConfigSource
genericConfig.OpenAPIConfig.Definitions = openapi.OpenAPIDefinitions
genericConfig.EnableOpenAPISupport = true
genericConfig.OpenAPIConfig.SecurityDefinitions = securityDefinitions
// TODO: Move this to generic api server (Need to move the command line flag).
if s.GenericServerRunOptions.EnableWatchCache {
cachesize.InitializeWatchCacheSizes(s.GenericServerRunOptions.TargetRAMMB)
cachesize.SetWatchCacheSizes(s.GenericServerRunOptions.WatchCacheSizes)
}
m, err := genericConfig.New()
if err != nil {
return err
}
routes.UIRedirect{}.Install(m.HandlerContainer)
routes.Logs{}.Install(m.HandlerContainer)
// TODO: Refactor this code to share it with kube-apiserver rather than duplicating it here.
restOptionsFactory := restOptionsFactory{
storageFactory: storageFactory,
enableGarbageCollection: s.GenericServerRunOptions.EnableGarbageCollection,
deleteCollectionWorkers: s.GenericServerRunOptions.DeleteCollectionWorkers,
}
if s.GenericServerRunOptions.EnableWatchCache {
restOptionsFactory.storageDecorator = registry.StorageWithCacher
} else {
restOptionsFactory.storageDecorator = generic.UndecoratedStorage
}
installFederationAPIs(m, restOptionsFactory)
installCoreAPIs(s, m, restOptionsFactory)
installExtensionsAPIs(m, restOptionsFactory)
sharedInformers.Start(wait.NeverStop)
m.PrepareRun().Run(wait.NeverStop)
return nil
}
type restOptionsFactory struct {
storageFactory genericapiserver.StorageFactory
storageDecorator generic.StorageDecorator
deleteCollectionWorkers int
enableGarbageCollection bool
}
func (f restOptionsFactory) NewFor(resource unversioned.GroupResource) generic.RESTOptions {
config, err := f.storageFactory.NewConfig(resource)
if err != nil {
glog.Fatalf("Unable to find storage config for %v, due to %v", resource, err.Error())
}
return generic.RESTOptions{
StorageConfig: config,
Decorator: f.storageDecorator,
DeleteCollectionWorkers: f.deleteCollectionWorkers,
EnableGarbageCollection: f.enableGarbageCollection,
ResourcePrefix: f.storageFactory.ResourcePrefix(resource),
}
}