diff --git a/cmd/kube-apiserver/app/BUILD b/cmd/kube-apiserver/app/BUILD index a107cf0dc70..8ec3a3c952d 100644 --- a/cmd/kube-apiserver/app/BUILD +++ b/cmd/kube-apiserver/app/BUILD @@ -14,7 +14,6 @@ go_library( "//pkg/api/legacyscheme:go_default_library", "//pkg/capabilities:go_default_library", "//pkg/controller/serviceaccount:go_default_library", - "//pkg/features:go_default_library", "//pkg/generated/openapi:go_default_library", "//pkg/kubeapiserver:go_default_library", "//pkg/kubeapiserver/admission:go_default_library", diff --git a/cmd/kube-apiserver/app/options/BUILD b/cmd/kube-apiserver/app/options/BUILD index 857701f7903..770d36dbb8e 100644 --- a/cmd/kube-apiserver/app/options/BUILD +++ b/cmd/kube-apiserver/app/options/BUILD @@ -21,10 +21,12 @@ go_library( "//pkg/kubelet/client:go_default_library", "//pkg/master/ports:go_default_library", "//pkg/master/reconcilers:go_default_library", + "//pkg/serviceaccount:go_default_library", "//staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver:go_default_library", "//staging/src/k8s.io/apimachinery/pkg/util/net:go_default_library", "//staging/src/k8s.io/apiserver/pkg/server/options:go_default_library", "//staging/src/k8s.io/apiserver/pkg/storage/storagebackend:go_default_library", + "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library", "//staging/src/k8s.io/apiserver/pkg/util/flag:go_default_library", "//staging/src/k8s.io/kube-aggregator/pkg/apiserver/scheme:go_default_library", ], diff --git a/cmd/kube-apiserver/app/options/options.go b/cmd/kube-apiserver/app/options/options.go index 7416c214fbb..23146dd913a 100644 --- a/cmd/kube-apiserver/app/options/options.go +++ b/cmd/kube-apiserver/app/options/options.go @@ -27,13 +27,12 @@ import ( "k8s.io/apiserver/pkg/storage/storagebackend" apiserverflag "k8s.io/apiserver/pkg/util/flag" api "k8s.io/kubernetes/pkg/apis/core" + _ "k8s.io/kubernetes/pkg/features" // add the kubernetes feature gates kubeoptions "k8s.io/kubernetes/pkg/kubeapiserver/options" kubeletclient "k8s.io/kubernetes/pkg/kubelet/client" "k8s.io/kubernetes/pkg/master/ports" "k8s.io/kubernetes/pkg/master/reconcilers" - - // add the kubernetes feature gates - _ "k8s.io/kubernetes/pkg/features" + "k8s.io/kubernetes/pkg/serviceaccount" ) // ServerRunOptions runs a kubernetes api server. @@ -70,7 +69,9 @@ type ServerRunOptions struct { MasterCount int EndpointReconcilerType string - ServiceAccountSigningKeyFile string + ServiceAccountSigningKeyFile string + ServiceAccountIssuer serviceaccount.TokenGenerator + ServiceAccountTokenMaxExpiration time.Duration } // NewServerRunOptions creates a new ServerRunOptions object with default parameters diff --git a/cmd/kube-apiserver/app/options/validation.go b/cmd/kube-apiserver/app/options/validation.go index f1295756621..4ea411d41ba 100644 --- a/cmd/kube-apiserver/app/options/validation.go +++ b/cmd/kube-apiserver/app/options/validation.go @@ -20,8 +20,10 @@ import ( "fmt" apiextensionsapiserver "k8s.io/apiextensions-apiserver/pkg/apiserver" + utilfeature "k8s.io/apiserver/pkg/util/feature" aggregatorscheme "k8s.io/kube-aggregator/pkg/apiserver/scheme" "k8s.io/kubernetes/pkg/api/legacyscheme" + "k8s.io/kubernetes/pkg/features" ) // TODO: Longer term we should read this from some config store, rather than a flag. @@ -49,6 +51,34 @@ func validateServiceNodePort(options *ServerRunOptions) []error { return errors } +func validateTokenRequest(options *ServerRunOptions) []error { + errors := []error{} + + enableAttempted := options.ServiceAccountSigningKeyFile != "" || + options.Authentication.ServiceAccounts.Issuer != "" || + len(options.Authentication.APIAudiences) != 0 + + enableSucceeded := options.ServiceAccountIssuer != nil + + if enableAttempted && !utilfeature.DefaultFeatureGate.Enabled(features.TokenRequest) { + errors = append(errors, fmt.Errorf("the TokenRequest feature is not enabled but --service-account-signing-key-file, --service-account-issuer and/or --api-audiences flags were passed")) + } + + if utilfeature.DefaultFeatureGate.Enabled(features.BoundServiceAccountTokenVolume) && !utilfeature.DefaultFeatureGate.Enabled(features.TokenRequest) { + errors = append(errors, fmt.Errorf("the BoundServiceAccountTokenVolume feature depends on the TokenRequest feature, but the TokenRequest features is not enabled")) + } + + if !enableAttempted && utilfeature.DefaultFeatureGate.Enabled(features.BoundServiceAccountTokenVolume) { + errors = append(errors, fmt.Errorf("--service-account-signing-key-file and --service-account-issuer are required flags")) + } + + if enableAttempted && !enableSucceeded { + errors = append(errors, fmt.Errorf("--service-account-signing-key-file, --service-account-issuer, and --api-audiences should be specified together")) + } + + return errors +} + // Validate checks ServerRunOptions and return a slice of found errors. func (s *ServerRunOptions) Validate() []error { var errors []error @@ -85,6 +115,9 @@ func (s *ServerRunOptions) Validate() []error { if errs := s.APIEnablement.Validate(legacyscheme.Scheme, apiextensionsapiserver.Scheme, aggregatorscheme.Scheme); len(errs) > 0 { errors = append(errors, errs...) } + if errs := validateTokenRequest(s); len(errs) > 0 { + errors = append(errors, errs...) + } return errors } diff --git a/cmd/kube-apiserver/app/server.go b/cmd/kube-apiserver/app/server.go index f38af7331c3..430c04bc618 100644 --- a/cmd/kube-apiserver/app/server.go +++ b/cmd/kube-apiserver/app/server.go @@ -33,7 +33,6 @@ import ( "github.com/go-openapi/spec" "github.com/spf13/cobra" - "k8s.io/klog" extensionsapiserver "k8s.io/apiextensions-apiserver/pkg/apiserver" "k8s.io/apimachinery/pkg/apis/meta/v1" @@ -50,13 +49,13 @@ import ( serveroptions "k8s.io/apiserver/pkg/server/options" serverstorage "k8s.io/apiserver/pkg/server/storage" "k8s.io/apiserver/pkg/storage/etcd3/preflight" - utilfeature "k8s.io/apiserver/pkg/util/feature" apiserverflag "k8s.io/apiserver/pkg/util/flag" "k8s.io/apiserver/pkg/util/webhook" clientgoinformers "k8s.io/client-go/informers" clientgoclientset "k8s.io/client-go/kubernetes" certutil "k8s.io/client-go/util/cert" cloudprovider "k8s.io/cloud-provider" + "k8s.io/klog" aggregatorapiserver "k8s.io/kube-aggregator/pkg/apiserver" aggregatorscheme "k8s.io/kube-aggregator/pkg/apiserver/scheme" openapi "k8s.io/kube-openapi/pkg/common" @@ -64,7 +63,6 @@ import ( "k8s.io/kubernetes/pkg/api/legacyscheme" "k8s.io/kubernetes/pkg/capabilities" serviceaccountcontroller "k8s.io/kubernetes/pkg/controller/serviceaccount" - "k8s.io/kubernetes/pkg/features" generatedopenapi "k8s.io/kubernetes/pkg/generated/openapi" "k8s.io/kubernetes/pkg/kubeapiserver" kubeapiserveradmission "k8s.io/kubernetes/pkg/kubeapiserver/admission" @@ -78,13 +76,12 @@ import ( "k8s.io/kubernetes/pkg/registry/cachesize" rbacrest "k8s.io/kubernetes/pkg/registry/rbac/rest" "k8s.io/kubernetes/pkg/serviceaccount" - "k8s.io/kubernetes/pkg/version" - "k8s.io/kubernetes/pkg/version/verflag" - "k8s.io/kubernetes/plugin/pkg/auth/authenticator/token/bootstrap" - utilflag "k8s.io/kubernetes/pkg/util/flag" _ "k8s.io/kubernetes/pkg/util/reflector/prometheus" // for reflector metric registration _ "k8s.io/kubernetes/pkg/util/workqueue/prometheus" // for workqueue metric registration + "k8s.io/kubernetes/pkg/version" + "k8s.io/kubernetes/pkg/version/verflag" + "k8s.io/kubernetes/plugin/pkg/auth/authenticator/token/bootstrap" ) const etcdRetryLimit = 60 @@ -318,48 +315,6 @@ func CreateKubeAPIServerConfig( return } - var ( - issuer serviceaccount.TokenGenerator - maxExpiration time.Duration - ) - - if s.ServiceAccountSigningKeyFile != "" || - s.Authentication.ServiceAccounts.Issuer != "" || - len(s.Authentication.APIAudiences) > 0 { - if !utilfeature.DefaultFeatureGate.Enabled(features.TokenRequest) { - lastErr = fmt.Errorf("the TokenRequest feature is not enabled but --service-account-signing-key-file, --service-account-issuer and/or --service-account-api-audiences flags were passed") - return - } - if s.ServiceAccountSigningKeyFile == "" || - s.Authentication.ServiceAccounts.Issuer == "" || - len(s.Authentication.APIAudiences) == 0 || - len(s.Authentication.ServiceAccounts.KeyFiles) == 0 { - lastErr = fmt.Errorf("service-account-signing-key-file, service-account-issuer, service-account-api-audiences and service-account-key-file should be specified together") - return - } - sk, err := certutil.PrivateKeyFromFile(s.ServiceAccountSigningKeyFile) - if err != nil { - lastErr = fmt.Errorf("failed to parse service-account-issuer-key-file: %v", err) - return - } - if s.Authentication.ServiceAccounts.MaxExpiration != 0 { - lowBound := time.Hour - upBound := time.Duration(1<<32) * time.Second - if s.Authentication.ServiceAccounts.MaxExpiration < lowBound || - s.Authentication.ServiceAccounts.MaxExpiration > upBound { - lastErr = fmt.Errorf("the serviceaccount max expiration is out of range, must be between 1 hour to 2^32 seconds") - return - } - } - - issuer, err = serviceaccount.JWTTokenGenerator(s.Authentication.ServiceAccounts.Issuer, sk) - if err != nil { - lastErr = fmt.Errorf("failed to build token generator: %v", err) - return - } - maxExpiration = s.Authentication.ServiceAccounts.MaxExpiration - } - config = &master.Config{ GenericConfig: genericConfig, ExtraConfig: master.ExtraConfig{ @@ -391,8 +346,8 @@ func CreateKubeAPIServerConfig( EndpointReconcilerType: reconcilers.Type(s.EndpointReconcilerType), MasterCount: s.MasterCount, - ServiceAccountIssuer: issuer, - ServiceAccountMaxExpiration: maxExpiration, + ServiceAccountIssuer: s.ServiceAccountIssuer, + ServiceAccountMaxExpiration: s.ServiceAccountTokenMaxExpiration, VersionedInformers: versionedInformers, }, @@ -603,6 +558,27 @@ func Complete(s *options.ServerRunOptions) (completedServerRunOptions, error) { } } + if s.ServiceAccountSigningKeyFile != "" && s.Authentication.ServiceAccounts.Issuer != "" { + sk, err := certutil.PrivateKeyFromFile(s.ServiceAccountSigningKeyFile) + if err != nil { + return options, fmt.Errorf("failed to parse service-account-issuer-key-file: %v", err) + } + if s.Authentication.ServiceAccounts.MaxExpiration != 0 { + lowBound := time.Hour + upBound := time.Duration(1<<32) * time.Second + if s.Authentication.ServiceAccounts.MaxExpiration < lowBound || + s.Authentication.ServiceAccounts.MaxExpiration > upBound { + return options, fmt.Errorf("the serviceaccount max expiration must be between 1 hour to 2^32 seconds") + } + } + + s.ServiceAccountIssuer, err = serviceaccount.JWTTokenGenerator(s.Authentication.ServiceAccounts.Issuer, sk) + if err != nil { + return options, fmt.Errorf("failed to build token generator: %v", err) + } + s.ServiceAccountTokenMaxExpiration = s.Authentication.ServiceAccounts.MaxExpiration + } + if s.Etcd.EnableWatchCache { klog.V(2).Infof("Initializing cache sizes based on %dMB limit", s.GenericServerRunOptions.TargetRAMMB) sizes := cachesize.NewHeuristicWatchCacheSizes(s.GenericServerRunOptions.TargetRAMMB) diff --git a/test/integration/auth/svcaccttoken_test.go b/test/integration/auth/svcaccttoken_test.go index 6409c475bed..7b9d39ebadd 100644 --- a/test/integration/auth/svcaccttoken_test.go +++ b/test/integration/auth/svcaccttoken_test.go @@ -89,7 +89,7 @@ func TestServiceAccountTokenCreate(t *testing.T) { } masterConfig.ExtraConfig.ServiceAccountIssuer = tokenGenerator masterConfig.ExtraConfig.ServiceAccountMaxExpiration = maxExpirationDuration - masterConfig.ExtraConfig.APIAudiences = aud + masterConfig.GenericConfig.Authentication.APIAudiences = aud master, _, closeFn := framework.RunAMaster(masterConfig) defer closeFn()