113 lines
3.5 KiB
Go
113 lines
3.5 KiB
Go
/*
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Copyright 2015 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 podsecuritypolicy
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import (
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"context"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"k8s.io/apiserver/pkg/registry/rest"
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"k8s.io/apiserver/pkg/storage/names"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/kubernetes/pkg/api/legacyscheme"
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psputil "k8s.io/kubernetes/pkg/api/podsecuritypolicy"
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"k8s.io/kubernetes/pkg/apis/policy"
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"k8s.io/kubernetes/pkg/apis/policy/validation"
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"k8s.io/kubernetes/pkg/features"
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)
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// strategy implements behavior for PodSecurityPolicy objects
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type strategy struct {
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runtime.ObjectTyper
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names.NameGenerator
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}
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// Strategy is the default logic that applies when creating and updating PodSecurityPolicy
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// objects via the REST API.
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var Strategy = strategy{legacyscheme.Scheme, names.SimpleNameGenerator}
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var _ = rest.RESTCreateStrategy(Strategy)
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var _ = rest.RESTUpdateStrategy(Strategy)
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func (strategy) NamespaceScoped() bool {
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return false
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}
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func (strategy) AllowCreateOnUpdate() bool {
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return false
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}
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func (strategy) AllowUnconditionalUpdate() bool {
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return true
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}
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func (strategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
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psp := obj.(*policy.PodSecurityPolicy)
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psputil.DropDisabledFields(&psp.Spec, nil)
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}
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func (strategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
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newPsp := obj.(*policy.PodSecurityPolicy)
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oldPsp := old.(*policy.PodSecurityPolicy)
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psputil.DropDisabledFields(&newPsp.Spec, &oldPsp.Spec)
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}
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func (strategy) Canonicalize(obj runtime.Object) {
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}
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func (strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
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opts := validation.PodSecurityPolicyValidationOptions{
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// Only allowed if the feature is enabled.
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AllowEphemeralVolumeType: utilfeature.DefaultFeatureGate.Enabled(features.GenericEphemeralVolume),
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}
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return validation.ValidatePodSecurityPolicy(obj.(*policy.PodSecurityPolicy), opts)
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}
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// WarningsOnCreate returns warnings for the creation of the given object.
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func (strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string { return nil }
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func (strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
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opts := validation.PodSecurityPolicyValidationOptions{
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// Allowed if the feature is enabled or the old policy already had it.
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// A policy that had the type set when that was valid must remain valid.
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AllowEphemeralVolumeType: utilfeature.DefaultFeatureGate.Enabled(features.GenericEphemeralVolume) ||
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volumeInUse(old.(*policy.PodSecurityPolicy), policy.Ephemeral),
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}
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return validation.ValidatePodSecurityPolicyUpdate(old.(*policy.PodSecurityPolicy), obj.(*policy.PodSecurityPolicy), opts)
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}
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// WarningsOnUpdate returns warnings for the given update.
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func (strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
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return nil
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}
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func volumeInUse(oldPSP *policy.PodSecurityPolicy, volume policy.FSType) bool {
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if oldPSP == nil {
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return false
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}
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for _, v := range oldPSP.Spec.Volumes {
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if v == volume {
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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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