validate kube-apiserver options

pkg/registry/cachesize/cachesize.go

@@ -105,6 +105,10 @@ func SetWatchCacheSizes(cacheSizes []string) {
 			glog.Errorf("invalid size of watch cache capabilities: %s", c)
 			continue
 		}
+		if size < 0 {
+			glog.Errorf("watch cache size cannot be negative: %s", c)
+			continue
+		}
 
 		watchCacheSizes[Resource(strings.ToLower(tokens[0]))] = size
 	}

staging/src/k8s.io/apiextensions-apiserver/pkg/cmd/server/BUILD

@@ -16,6 +16,7 @@ go_library(
         "//vendor/k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1:go_default_library",
         "//vendor/k8s.io/apiextensions-apiserver/pkg/apiserver:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/registry/generic:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/server:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/server/options:go_default_library",

staging/src/k8s.io/apiextensions-apiserver/pkg/cmd/server/start.go

@@ -26,6 +26,7 @@ import (
 	"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
 	"k8s.io/apiextensions-apiserver/pkg/apiserver"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	genericregistry "k8s.io/apiserver/pkg/registry/generic"
 	genericapiserver "k8s.io/apiserver/pkg/server"
 	genericoptions "k8s.io/apiserver/pkg/server/options"
@@ -78,7 +79,9 @@ func NewCommandStartCustomResourceDefinitionsServer(out, errOut io.Writer, stopC
 }
 
 func (o CustomResourceDefinitionsServerOptions) Validate(args []string) error {
-	return nil
+	errors := []error{}
+	errors = append(errors, o.RecommendedOptions.Validate()...)
+	return utilerrors.NewAggregate(errors)
 }
 
 func (o *CustomResourceDefinitionsServerOptions) Complete() error {

staging/src/k8s.io/apiserver/pkg/server/options/admission.go

@@ -89,3 +89,8 @@ func (a *AdmissionOptions) ApplyTo(serverCfg *server.Config, pluginInitializers
 	serverCfg.AdmissionControl = admissionChain
 	return nil
 }
+
+func (a *AdmissionOptions) Validate() []error {
+	errs := []error{}
+	return errs
+}

staging/src/k8s.io/apiserver/pkg/server/options/feature.go

@@ -55,3 +55,8 @@ func (o *FeatureOptions) ApplyTo(c *server.Config) error {
 
 	return nil
 }
+
+func (o *FeatureOptions) Validate() []error {
+	errs := []error{}
+	return errs
+}

staging/src/k8s.io/apiserver/pkg/server/options/recommended.go

@@ -77,3 +77,15 @@ func (o *RecommendedOptions) ApplyTo(config *server.Config) error {
 
 	return nil
 }
+
+func (o *RecommendedOptions) Validate() []error {
+	errors := []error{}
+	errors = append(errors, o.Etcd.Validate()...)
+	errors = append(errors, o.SecureServing.Validate()...)
+	errors = append(errors, o.Authentication.Validate()...)
+	errors = append(errors, o.Authorization.Validate()...)
+	errors = append(errors, o.Audit.Validate()...)
+	errors = append(errors, o.Features.Validate()...)
+
+	return errors
+}

staging/src/k8s.io/kube-aggregator/pkg/cmd/server/BUILD

@@ -14,6 +14,7 @@ go_library(
     deps = [
         "//vendor/github.com/spf13/cobra:go_default_library",
         "//vendor/github.com/spf13/pflag:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/server:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/server/filters:go_default_library",

staging/src/k8s.io/kube-aggregator/pkg/cmd/server/start.go

@@ -25,6 +25,7 @@ import (
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/apimachinery/pkg/util/sets"
 	genericapiserver "k8s.io/apiserver/pkg/server"
 	"k8s.io/apiserver/pkg/server/filters"
@@ -47,7 +48,7 @@ type AggregatorOptions struct {
 	ProxyClientCertFile string
 	ProxyClientKeyFile  string
 
-	// CoreAPIKubeconfig is a filename for a kubeconfig file to contact the core API server wtih
+	// CoreAPIKubeconfig is a filename for a kubeconfig file to contact the core API server with
 	// If it is not set, the in cluster config is used
 	CoreAPIKubeconfig string
 
@@ -102,7 +103,9 @@ func NewDefaultOptions(out, err io.Writer) *AggregatorOptions {
 }
 
 func (o AggregatorOptions) Validate(args []string) error {
-	return nil
+	errors := []error{}
+	errors = append(errors, o.RecommendedOptions.Validate()...)
+	return utilerrors.NewAggregate(errors)
 }
 
 func (o *AggregatorOptions) Complete() error {

staging/src/k8s.io/sample-apiserver/pkg/cmd/server/BUILD

@@ -13,6 +13,7 @@ go_library(
     tags = ["automanaged"],
     deps = [
         "//vendor/github.com/spf13/cobra:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/server:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/server/options:go_default_library",
         "//vendor/k8s.io/sample-apiserver/pkg/apis/wardle/v1alpha1:go_default_library",

staging/src/k8s.io/sample-apiserver/pkg/cmd/server/start.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/spf13/cobra"
 
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	genericapiserver "k8s.io/apiserver/pkg/server"
 	genericoptions "k8s.io/apiserver/pkg/server/options"
 	"k8s.io/sample-apiserver/pkg/apis/wardle/v1alpha1"
@@ -80,7 +81,10 @@ func NewCommandStartWardleServer(out, errOut io.Writer, stopCh <-chan struct{})
 }
 
 func (o WardleServerOptions) Validate(args []string) error {
-	return nil
+	errors := []error{}
+	errors = append(errors, o.RecommendedOptions.Validate()...)
+	errors = append(errors, o.Admission.Validate()...)
+	return utilerrors.NewAggregate(errors)
 }
 
 func (o *WardleServerOptions) Complete() error {