mirror of
https://github.com/ceph/ceph-csi.git
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104 lines
2.9 KiB
Go
104 lines
2.9 KiB
Go
/*
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Copyright 2018 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 admission
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import (
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"context"
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"fmt"
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auditinternal "k8s.io/apiserver/pkg/apis/audit"
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"k8s.io/apiserver/pkg/audit"
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)
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// auditHandler logs annotations set by other admission handlers
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type auditHandler struct {
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Interface
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ae *auditinternal.Event
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}
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var _ Interface = &auditHandler{}
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var _ MutationInterface = &auditHandler{}
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var _ ValidationInterface = &auditHandler{}
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// WithAudit is a decorator for a admission phase. It saves annotations
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// of attribute into the audit event. Attributes passed to the Admit and
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// Validate function must be instance of privateAnnotationsGetter or
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// AnnotationsGetter, otherwise an error is returned.
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func WithAudit(i Interface, ae *auditinternal.Event) Interface {
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if i == nil {
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return i
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}
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return &auditHandler{i, ae}
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}
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func (handler auditHandler) Admit(ctx context.Context, a Attributes, o ObjectInterfaces) error {
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if !handler.Interface.Handles(a.GetOperation()) {
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return nil
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}
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if err := ensureAnnotationGetter(a); err != nil {
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return err
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}
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var err error
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if mutator, ok := handler.Interface.(MutationInterface); ok {
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err = mutator.Admit(ctx, a, o)
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handler.logAnnotations(a)
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}
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return err
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}
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func (handler auditHandler) Validate(ctx context.Context, a Attributes, o ObjectInterfaces) error {
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if !handler.Interface.Handles(a.GetOperation()) {
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return nil
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}
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if err := ensureAnnotationGetter(a); err != nil {
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return err
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}
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var err error
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if validator, ok := handler.Interface.(ValidationInterface); ok {
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err = validator.Validate(ctx, a, o)
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handler.logAnnotations(a)
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}
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return err
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}
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func ensureAnnotationGetter(a Attributes) error {
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_, okPrivate := a.(privateAnnotationsGetter)
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_, okPublic := a.(AnnotationsGetter)
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if okPrivate || okPublic {
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return nil
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}
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return fmt.Errorf("attributes must be an instance of privateAnnotationsGetter or AnnotationsGetter")
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}
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func (handler auditHandler) logAnnotations(a Attributes) {
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if handler.ae == nil {
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return
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}
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switch a := a.(type) {
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case privateAnnotationsGetter:
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for key, value := range a.getAnnotations(handler.ae.Level) {
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audit.LogAnnotation(handler.ae, key, value)
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}
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case AnnotationsGetter:
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for key, value := range a.GetAnnotations(handler.ae.Level) {
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audit.LogAnnotation(handler.ae, key, value)
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}
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default:
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// this will never happen, because we have already checked it in ensureAnnotationGetter
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}
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}
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