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/*
Copyright 2016 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 options
import (
"strings"
"time"
"github.com/spf13/pflag"
versionedinformers "k8s.io/client-go/informers"
informers "k8s.io/kubernetes/pkg/client/informers/informers_generated/internalversion"
"k8s.io/kubernetes/pkg/kubeapiserver/authorizer"
authzmodes "k8s.io/kubernetes/pkg/kubeapiserver/authorizer/modes"
)
type BuiltInAuthorizationOptions struct {
Mode string
PolicyFile string
WebhookConfigFile string
WebhookCacheAuthorizedTTL time.Duration
WebhookCacheUnauthorizedTTL time.Duration
}
func NewBuiltInAuthorizationOptions() *BuiltInAuthorizationOptions {
return &BuiltInAuthorizationOptions{
Mode: authzmodes.ModeAlwaysAllow,
WebhookCacheAuthorizedTTL: 5 * time.Minute,
WebhookCacheUnauthorizedTTL: 30 * time.Second,
}
}
func (s *BuiltInAuthorizationOptions) Validate() []error {
allErrors := []error{}
return allErrors
}
func (s *BuiltInAuthorizationOptions) AddFlags(fs *pflag.FlagSet) {
fs.StringVar(&s.Mode, "authorization-mode", s.Mode, ""+
"Ordered list of plug-ins to do authorization on secure port. Comma-delimited list of: "+
strings.Join(authzmodes.AuthorizationModeChoices, ",")+".")
fs.StringVar(&s.PolicyFile, "authorization-policy-file", s.PolicyFile, ""+
"File with authorization policy in csv format, used with --authorization-mode=ABAC, on the secure port.")
fs.StringVar(&s.WebhookConfigFile, "authorization-webhook-config-file", s.WebhookConfigFile, ""+
"File with webhook configuration in kubeconfig format, used with --authorization-mode=Webhook. "+
"The API server will query the remote service to determine access on the API server's secure port.")
fs.DurationVar(&s.WebhookCacheAuthorizedTTL, "authorization-webhook-cache-authorized-ttl",
s.WebhookCacheAuthorizedTTL,
"The duration to cache 'authorized' responses from the webhook authorizer.")
fs.DurationVar(&s.WebhookCacheUnauthorizedTTL,
"authorization-webhook-cache-unauthorized-ttl", s.WebhookCacheUnauthorizedTTL,
"The duration to cache 'unauthorized' responses from the webhook authorizer.")
fs.String("authorization-rbac-super-user", "", ""+
"If specified, a username which avoids RBAC authorization checks and role binding "+
"privilege escalation checks, to be used with --authorization-mode=RBAC.")
fs.MarkDeprecated("authorization-rbac-super-user", "Removed during alpha to beta. The 'system:masters' group has privileged access.")
}
func (s *BuiltInAuthorizationOptions) Modes() []string {
modes := []string{}
if len(s.Mode) > 0 {
modes = strings.Split(s.Mode, ",")
}
return modes
}
func (s *BuiltInAuthorizationOptions) ToAuthorizationConfig(informerFactory informers.SharedInformerFactory, versionedInformerFactory versionedinformers.SharedInformerFactory) authorizer.AuthorizationConfig {
return authorizer.AuthorizationConfig{
AuthorizationModes: s.Modes(),
PolicyFile: s.PolicyFile,
WebhookConfigFile: s.WebhookConfigFile,
WebhookCacheAuthorizedTTL: s.WebhookCacheAuthorizedTTL,
WebhookCacheUnauthorizedTTL: s.WebhookCacheUnauthorizedTTL,
InformerFactory: informerFactory,
VersionedInformerFactory: versionedInformerFactory,
}
}
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