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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| package batteries | ||
|
|
||
| import ( | ||
| "golang.org/x/exp/slices" | ||
| "k8s.io/apimachinery/pkg/util/sets" | ||
| "k8s.io/apiserver/pkg/admission" | ||
| "k8s.io/apiserver/pkg/admission/plugin/namespace/lifecycle" | ||
| validatingadmissionpolicy "k8s.io/apiserver/pkg/admission/plugin/policy/validating" | ||
| "k8s.io/apiserver/pkg/admission/plugin/resourcequota" | ||
| mutatingwebhook "k8s.io/apiserver/pkg/admission/plugin/webhook/mutating" | ||
| validatingwebhook "k8s.io/apiserver/pkg/admission/plugin/webhook/validating" | ||
| controlplaneapiserver "k8s.io/kubernetes/pkg/controlplane/apiserver" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/admit" | ||
| certapproval "k8s.io/kubernetes/plugin/pkg/admission/certificates/approval" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/certificates/ctbattest" | ||
|
|
||
| certsigning "k8s.io/kubernetes/plugin/pkg/admission/certificates/signing" | ||
| certsubjectrestriction "k8s.io/kubernetes/plugin/pkg/admission/certificates/subjectrestriction" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/defaulttolerationseconds" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/deny" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/eventratelimit" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/gc" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/namespace/autoprovision" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/namespace/exists" | ||
| "k8s.io/kubernetes/plugin/pkg/admission/serviceaccount" | ||
| // Admission policies | ||
| ) | ||
|
|
||
| type Batteries struct { | ||
| list BatteriesList | ||
|
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| BatteriesArgs []string | ||
| } | ||
|
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| type Battery string | ||
|
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| type BatteriesList map[Battery]BatterySpec | ||
|
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| type BatterySpec struct { | ||
| // Enabled indicates whether the battery is enabled. | ||
| Enabled bool | ||
|
|
||
| // GroupNames is the list of group names that the battery is responsible for. | ||
| // If disabled, the battery will not be registered for these groups. | ||
| GroupNames []string | ||
| } | ||
|
|
||
| const ( | ||
| // BatteryLeases is the name of the lease battery. | ||
| BatteryLeases Battery = "leases" | ||
| // BatteryAuthentication is the name of the authentication battery. | ||
| BatteryAuthentication Battery = "authentication" | ||
| // BatteryAuthorization is the name of the authorization battery. | ||
| BatteryAuthorization Battery = "authorization" | ||
| // BatteryAdmission is the name of the admission battery. | ||
| BatteryAdmission Battery = "admission" | ||
| // BatteryFlowControl is the name of the flow control battery. | ||
| BatteryFlowControl Battery = "flowcontrol" | ||
| ) | ||
|
|
||
| var ( | ||
| // The generic features. | ||
| defaultBatteries = map[Battery]BatterySpec{ | ||
| BatteryLeases: {Enabled: false, GroupNames: []string{"coordination.k8s.io"}}, | ||
| BatteryAuthentication: {Enabled: false, GroupNames: []string{"authentication.k8s.io", "rbac.authentication.k8s.io"}}, | ||
| BatteryAuthorization: {Enabled: false, GroupNames: []string{"authorization.k8s.io", "rbac.authorization.k8s.io"}}, | ||
| BatteryAdmission: {Enabled: false, GroupNames: []string{"admissionregistration.k8s.io"}}, | ||
| BatteryFlowControl: {Enabled: false, GroupNames: []string{"flowcontrol.apiserver.k8s.io"}}, | ||
| } | ||
| ) | ||
|
|
||
| func (b Battery) String() string { | ||
| return string(b) | ||
| } | ||
|
|
||
| func New() Batteries { | ||
| b := Batteries{ | ||
| list: make(BatteriesList, len(defaultBatteries)), | ||
| } | ||
| for name, spec := range defaultBatteries { | ||
| b.list[name] = spec | ||
| } | ||
| return b | ||
| } | ||
|
|
||
| func (b Batteries) Enable(name Battery) { | ||
| _b := b.list[name] | ||
| _b.Enabled = true | ||
| b.list[name] = _b | ||
| } | ||
|
|
||
| func (b Batteries) Disable(name Battery) { | ||
| _b := b.list[name] | ||
| _b.Enabled = false | ||
| b.list[name] = _b | ||
| } | ||
|
|
||
| func (b Batteries) IsEnabled(name Battery) bool { | ||
| spec, ok := b.list[name] | ||
| return ok && spec.Enabled | ||
| } | ||
|
|
||
| // RegisterAllAdmissionPlugins registers all admission plugins based on the batteries configuration. | ||
| func (b Batteries) RegisterAllAdmissionPlugins(plugins *admission.Plugins) { | ||
| admit.Register(plugins) // DEPRECATED as no real meaning | ||
| autoprovision.Register(plugins) | ||
| lifecycle.Register(plugins) | ||
| exists.Register(plugins) | ||
| serviceaccount.Register(plugins) | ||
| eventratelimit.Register(plugins) | ||
| gc.Register(plugins) | ||
| certapproval.Register(plugins) | ||
| certsigning.Register(plugins) | ||
| ctbattest.Register(plugins) | ||
| certsubjectrestriction.Register(plugins) | ||
| mutatingwebhook.Register(plugins) | ||
| validatingadmissionpolicy.Register(plugins) | ||
| validatingwebhook.Register(plugins) | ||
| resourcequota.Register(plugins) | ||
| deny.Register(plugins) | ||
| } | ||
|
|
||
| func (b Batteries) DefaultOffAdmissionPlugins() sets.Set[string] { | ||
| defaultOnPlugins := sets.New( | ||
| lifecycle.PluginName, // NamespaceLifecycle | ||
| // limitranger.PluginName, // LimitRanger | ||
| serviceaccount.PluginName, // ServiceAccount | ||
| resourcequota.PluginName, // ResourceQuota | ||
| certapproval.PluginName, // CertificateApproval | ||
| certsigning.PluginName, // CertificateSigning | ||
| ctbattest.PluginName, // ClusterTrustBundleAttest | ||
| certsubjectrestriction.PluginName, // CertificateSubjectRestriction | ||
| defaulttolerationseconds.PluginName, // DefaultTolerationSeconds | ||
| ) | ||
|
|
||
| if b.IsEnabled(BatteryAdmission) { | ||
| defaultOnPlugins.Insert( | ||
| mutatingwebhook.PluginName, // MutatingAdmissionWebhook | ||
| validatingwebhook.PluginName, // ValidatingAdmissionWebhook | ||
| validatingadmissionpolicy.PluginName, // ValidatingAdmissionPolicy, only active when feature gate ValidatingAdmissionPolicy is enabled | ||
| ) | ||
| } | ||
|
|
||
| return sets.New[string](AllOrderedPlugins...).Difference(defaultOnPlugins) | ||
| } | ||
|
|
||
| func (b Batteries) containsAndDisabled(name string) bool { | ||
| for _, spec := range b.list { | ||
| if slices.Contains(spec.GroupNames, name) && !spec.Enabled { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| func (b Batteries) FilterStorageProviders(input []controlplaneapiserver.RESTStorageProvider) []controlplaneapiserver.RESTStorageProvider { | ||
| var result []controlplaneapiserver.RESTStorageProvider | ||
| for _, rest := range input { | ||
| if b.containsAndDisabled(rest.GroupName()) { | ||
| continue | ||
| } | ||
| result = append(result, rest) | ||
| } | ||
| return result | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| /* | ||
| Copyright 2024 The KCP 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 batteries | ||
|
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| import ( | ||
| "fmt" | ||
|
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| "github.com/spf13/pflag" | ||
|
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| utilruntime "k8s.io/apimachinery/pkg/util/runtime" | ||
| genericfeatures "k8s.io/apiserver/pkg/features" | ||
| utilfeature "k8s.io/apiserver/pkg/util/feature" | ||
| ) | ||
|
|
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| // AddFlags adds the flags for the admin authentication to the given FlagSet. | ||
| func (s *Batteries) AddFlags(fs *pflag.FlagSet) { | ||
| if s == nil { | ||
| return | ||
| } | ||
|
|
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| fs.StringArrayVar(&s.BatteriesArgs, "batteries", []string{}, "The batteries to enable in the generic control-plane server.") | ||
| } | ||
|
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| func (b Batteries) Complete() { | ||
| // Ensure all some related configuration are configured | ||
|
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| for _, name := range b.BatteriesArgs { | ||
| if _, ok := b.list[Battery(name)]; ok { | ||
| b.Enable(Battery(name)) | ||
| } | ||
| } | ||
|
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| // If lease is disabled, we disable APIServerIdentity | ||
| if !b.IsEnabled(BatteryLeases) { | ||
| utilruntime.Must(utilfeature.DefaultMutableFeatureGate.Set(fmt.Sprintf("%s=false", genericfeatures.APIServerIdentity))) | ||
| } | ||
| } | ||
|
|
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| func (b Batteries) Validate() []error { | ||
| var errs []error | ||
| for _, name := range b.BatteriesArgs { | ||
| fmt.Println(name) | ||
| if _, ok := b.list[Battery(name)]; !ok { | ||
| errs = append(errs, fmt.Errorf("invalid battery %q", name)) | ||
| } | ||
| } | ||
| return errs | ||
| } |
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