mirror of
https://github.com/k3s-io/kubernetes.git
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267 lines
10 KiB
Go
267 lines
10 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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"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/kubernetes/federation/cmd/federation-apiserver/app/options"
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"k8s.io/kubernetes/pkg/admission"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/unversioned"
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"k8s.io/kubernetes/pkg/apis/rbac"
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"k8s.io/kubernetes/pkg/apiserver/authenticator"
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authorizerunion "k8s.io/kubernetes/pkg/auth/authorizer/union"
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"k8s.io/kubernetes/pkg/auth/user"
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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"
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"k8s.io/kubernetes/pkg/genericapiserver/authorizer"
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genericoptions "k8s.io/kubernetes/pkg/genericapiserver/options"
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genericvalidation "k8s.io/kubernetes/pkg/genericapiserver/validation"
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"k8s.io/kubernetes/pkg/registry/cachesize"
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"k8s.io/kubernetes/pkg/registry/generic"
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"k8s.io/kubernetes/pkg/registry/generic/registry"
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"k8s.io/kubernetes/pkg/registry/rbac/clusterrole"
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clusterroleetcd "k8s.io/kubernetes/pkg/registry/rbac/clusterrole/etcd"
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"k8s.io/kubernetes/pkg/registry/rbac/clusterrolebinding"
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clusterrolebindingetcd "k8s.io/kubernetes/pkg/registry/rbac/clusterrolebinding/etcd"
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"k8s.io/kubernetes/pkg/registry/rbac/role"
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roleetcd "k8s.io/kubernetes/pkg/registry/rbac/role/etcd"
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"k8s.io/kubernetes/pkg/registry/rbac/rolebinding"
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rolebindingetcd "k8s.io/kubernetes/pkg/registry/rbac/rolebinding/etcd"
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"k8s.io/kubernetes/pkg/routes"
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"k8s.io/kubernetes/pkg/util/wait"
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authenticatorunion "k8s.io/kubernetes/plugin/pkg/auth/authenticator/request/union"
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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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genericvalidation.VerifyEtcdServersList(s.ServerRunOptions)
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genericapiserver.DefaultAndValidateRunOptions(s.ServerRunOptions)
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// TODO: register cluster federation resources here.
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resourceConfig := genericapiserver.NewResourceConfig()
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storageGroupsToEncodingVersion, err := s.StorageGroupsToEncodingVersion()
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if err != nil {
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glog.Fatalf("error generating storage version map: %s", err)
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}
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storageFactory, err := genericapiserver.BuildDefaultStorageFactory(
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s.StorageConfig, s.DefaultStorageMediaType, api.Codecs,
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genericapiserver.NewDefaultResourceEncodingConfig(), storageGroupsToEncodingVersion,
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[]unversioned.GroupVersionResource{}, resourceConfig, s.RuntimeConfig)
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if err != nil {
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glog.Fatalf("error in initializing storage factory: %s", err)
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}
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for _, override := range s.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 := unversioned.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, err := authenticator.New(authenticator.AuthenticatorConfig{
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BasicAuthFile: s.BasicAuthFile,
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ClientCAFile: s.ClientCAFile,
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TokenAuthFile: s.TokenAuthFile,
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OIDCIssuerURL: s.OIDCIssuerURL,
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OIDCClientID: s.OIDCClientID,
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OIDCCAFile: s.OIDCCAFile,
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OIDCUsernameClaim: s.OIDCUsernameClaim,
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OIDCGroupsClaim: s.OIDCGroupsClaim,
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KeystoneURL: s.KeystoneURL,
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})
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if err != nil {
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glog.Fatalf("Invalid Authentication Config: %v", err)
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}
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authorizationModeNames := strings.Split(s.AuthorizationMode, ",")
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modeEnabled := func(mode string) bool {
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for _, m := range authorizationModeNames {
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if m == mode {
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return true
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}
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}
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return false
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}
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authorizationConfig := authorizer.AuthorizationConfig{
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PolicyFile: s.AuthorizationPolicyFile,
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WebhookConfigFile: s.AuthorizationWebhookConfigFile,
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WebhookCacheAuthorizedTTL: s.AuthorizationWebhookCacheAuthorizedTTL,
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WebhookCacheUnauthorizedTTL: s.AuthorizationWebhookCacheUnauthorizedTTL,
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RBACSuperUser: s.AuthorizationRBACSuperUser,
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}
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if modeEnabled(genericoptions.ModeRBAC) {
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mustGetRESTOptions := func(resource string) generic.RESTOptions {
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config, err := storageFactory.NewConfig(rbac.Resource(resource))
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if err != nil {
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glog.Fatalf("Unable to get %s storage: %v", resource, err)
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}
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return generic.RESTOptions{StorageConfig: config, Decorator: generic.UndecoratedStorage, ResourcePrefix: storageFactory.ResourcePrefix(rbac.Resource(resource))}
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}
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// For initial bootstrapping go directly to etcd to avoid privillege escalation check.
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authorizationConfig.RBACRoleRegistry = role.NewRegistry(roleetcd.NewREST(mustGetRESTOptions("roles")))
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authorizationConfig.RBACRoleBindingRegistry = rolebinding.NewRegistry(rolebindingetcd.NewREST(mustGetRESTOptions("rolebindings")))
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authorizationConfig.RBACClusterRoleRegistry = clusterrole.NewRegistry(clusterroleetcd.NewREST(mustGetRESTOptions("clusterroles")))
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authorizationConfig.RBACClusterRoleBindingRegistry = clusterrolebinding.NewRegistry(clusterrolebindingetcd.NewREST(mustGetRESTOptions("clusterrolebindings")))
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}
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apiAuthorizer, err := authorizer.NewAuthorizerFromAuthorizationConfig(authorizationModeNames, authorizationConfig)
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if err != nil {
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glog.Fatalf("Invalid Authorization Config: %v", err)
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}
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admissionControlPluginNames := strings.Split(s.AdmissionControl, ",")
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privilegedLoopbackToken := uuid.NewRandom().String()
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client, err := s.NewSelfClient(privilegedLoopbackToken)
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if err != nil {
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glog.Errorf("Failed to create clientset: %v", err)
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}
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// TODO(dims): We probably need to add an option "EnableLoopbackToken"
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if apiAuthenticator != nil {
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var uid = uuid.NewRandom().String()
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tokens := make(map[string]*user.DefaultInfo)
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tokens[privilegedLoopbackToken] = &user.DefaultInfo{
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Name: "system:apiserver",
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UID: uid,
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Groups: []string{"system:masters"},
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}
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tokenAuthenticator := authenticator.NewAuthenticatorFromTokens(tokens)
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apiAuthenticator = authenticatorunion.New(tokenAuthenticator, apiAuthenticator)
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tokenAuthorizer := authorizer.NewPrivilegedGroups("system:masters")
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apiAuthorizer = authorizerunion.New(tokenAuthorizer, apiAuthorizer)
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}
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sharedInformers := informers.NewSharedInformerFactory(client, 10*time.Minute)
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pluginInitializer := admission.NewPluginInitializer(sharedInformers)
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admissionController, err := admission.NewFromPlugins(client, admissionControlPluginNames, s.AdmissionControlConfigFile, pluginInitializer)
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if err != nil {
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glog.Fatalf("Failed to initialize plugins: %v", err)
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}
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genericConfig := genericapiserver.NewConfig(s.ServerRunOptions)
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// TODO: Move the following to generic api server as well.
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genericConfig.Authenticator = apiAuthenticator
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genericConfig.SupportsBasicAuth = len(s.BasicAuthFile) > 0
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genericConfig.Authorizer = apiAuthorizer
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genericConfig.AuthorizerRBACSuperUser = s.AuthorizationRBACSuperUser
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genericConfig.AdmissionControl = admissionController
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genericConfig.APIResourceConfigSource = storageFactory.APIResourceConfigSource
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genericConfig.MasterServiceNamespace = s.MasterServiceNamespace
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genericConfig.Serializer = api.Codecs
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genericConfig.OpenAPIDefinitions = openapi.OpenAPIDefinitions
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genericConfig.EnableOpenAPISupport = true
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// TODO: Move this to generic api server (Need to move the command line flag).
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if s.EnableWatchCache {
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cachesize.InitializeWatchCacheSizes(s.TargetRAMMB)
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cachesize.SetWatchCacheSizes(s.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.Mux, m.HandlerContainer)
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routes.Logs{}.Install(m.Mux, m.HandlerContainer)
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restOptionsFactory := restOptionsFactory{
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storageFactory: storageFactory,
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deleteCollectionWorkers: s.DeleteCollectionWorkers,
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}
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if s.EnableWatchCache {
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restOptionsFactory.storageDecorator = registry.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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sharedInformers.Start(wait.NeverStop)
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m.Run(s.ServerRunOptions)
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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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}
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func (f restOptionsFactory) NewFor(resource unversioned.GroupResource) generic.RESTOptions {
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config, err := f.storageFactory.NewConfig(resource)
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if err != nil {
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glog.Fatalf("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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ResourcePrefix: f.storageFactory.ResourcePrefix(resource),
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}
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}
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