/
recover.go
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/
recover.go
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// Copyright 2019 Istio 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 tombstone
import (
"fmt"
"reflect"
"istio.io/istio/galley/pkg/source/kube/log"
"istio.io/istio/galley/pkg/source/kube/stats"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/tools/cache"
)
// RecoverResource from a kubernetes tombstone (cache.DeletedFinalStateUnknown). Returns the resource or nil if
// recovery failed.
func RecoverResource(obj interface{}) metav1.Object {
var tombstone cache.DeletedFinalStateUnknown
var ok bool
if tombstone, ok = obj.(cache.DeletedFinalStateUnknown); !ok {
msg := fmt.Sprintf("error decoding object, invalid type: %v", reflect.TypeOf(obj))
log.Scope.Error(msg)
stats.RecordEventError(msg)
return nil
}
var objectMeta metav1.Object
if objectMeta, ok = tombstone.Obj.(metav1.Object); !ok {
msg := fmt.Sprintf("error decoding object tombstone, invalid type: %v",
reflect.TypeOf(tombstone.Obj))
log.Scope.Error(msg)
stats.RecordEventError(msg)
return nil
}
log.Scope.Infof("Recovered deleted object '%s' from tombstone", objectMeta.GetName())
return objectMeta
}