Update to kube v1.17

Signed-off-by: Humble Chirammal <hchiramm@redhat.com>

vendor/k8s.io/apiserver/pkg/admission/audit.go

@@ -0,0 +1,103 @@
+/*
+Copyright 2018 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 admission
+
+import (
+	"context"
+	"fmt"
+
+	auditinternal "k8s.io/apiserver/pkg/apis/audit"
+	"k8s.io/apiserver/pkg/audit"
+)
+
+// auditHandler logs annotations set by other admission handlers
+type auditHandler struct {
+	Interface
+	ae *auditinternal.Event
+}
+
+var _ Interface = &auditHandler{}
+var _ MutationInterface = &auditHandler{}
+var _ ValidationInterface = &auditHandler{}
+
+// WithAudit is a decorator for a admission phase. It saves annotations
+// of attribute into the audit event. Attributes passed to the Admit and
+// Validate function must be instance of privateAnnotationsGetter or
+// AnnotationsGetter, otherwise an error is returned.
+func WithAudit(i Interface, ae *auditinternal.Event) Interface {
+	if i == nil {
+		return i
+	}
+	return &auditHandler{i, ae}
+}
+
+func (handler auditHandler) Admit(ctx context.Context, a Attributes, o ObjectInterfaces) error {
+	if !handler.Interface.Handles(a.GetOperation()) {
+		return nil
+	}
+	if err := ensureAnnotationGetter(a); err != nil {
+		return err
+	}
+	var err error
+	if mutator, ok := handler.Interface.(MutationInterface); ok {
+		err = mutator.Admit(ctx, a, o)
+		handler.logAnnotations(a)
+	}
+	return err
+}
+
+func (handler auditHandler) Validate(ctx context.Context, a Attributes, o ObjectInterfaces) error {
+	if !handler.Interface.Handles(a.GetOperation()) {
+		return nil
+	}
+	if err := ensureAnnotationGetter(a); err != nil {
+		return err
+	}
+	var err error
+	if validator, ok := handler.Interface.(ValidationInterface); ok {
+		err = validator.Validate(ctx, a, o)
+		handler.logAnnotations(a)
+	}
+	return err
+}
+
+func ensureAnnotationGetter(a Attributes) error {
+	_, okPrivate := a.(privateAnnotationsGetter)
+	_, okPublic := a.(AnnotationsGetter)
+	if okPrivate || okPublic {
+		return nil
+	}
+	return fmt.Errorf("attributes must be an instance of privateAnnotationsGetter or AnnotationsGetter")
+}
+
+func (handler auditHandler) logAnnotations(a Attributes) {
+	if handler.ae == nil {
+		return
+	}
+	switch a := a.(type) {
+	case privateAnnotationsGetter:
+		for key, value := range a.getAnnotations(handler.ae.Level) {
+			audit.LogAnnotation(handler.ae, key, value)
+		}
+	case AnnotationsGetter:
+		for key, value := range a.GetAnnotations(handler.ae.Level) {
+			audit.LogAnnotation(handler.ae, key, value)
+		}
+	default:
+		// this will never happen, because we have already checked it in ensureAnnotationGetter
+	}
+}