124 lines
4.1 KiB
Go
124 lines
4.1 KiB
Go
/*
|
|
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 controller
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/golang/glog"
|
|
crdv1 "github.com/kubernetes-csi/external-snapshotter/pkg/apis/volumesnapshot/v1alpha1"
|
|
"k8s.io/api/core/v1"
|
|
"k8s.io/apimachinery/pkg/api/meta"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/client-go/tools/cache"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
var (
|
|
keyFunc = cache.DeletionHandlingMetaNamespaceKeyFunc
|
|
)
|
|
|
|
// GetNameAndNameSpaceFromSnapshotName retrieves the namespace and
|
|
// the short name of a snapshot from its full name
|
|
func GetNameAndNameSpaceFromSnapshotName(name string) (string, string, error) {
|
|
strs := strings.Split(name, "/")
|
|
if len(strs) != 2 {
|
|
return "", "", fmt.Errorf("invalid snapshot name")
|
|
}
|
|
return strs[0], strs[1], nil
|
|
}
|
|
|
|
func snapshotKey(vs *crdv1.VolumeSnapshot) string {
|
|
return fmt.Sprintf("%s/%s", vs.Namespace, vs.Name)
|
|
}
|
|
|
|
func snapshotRefKey(vsref *v1.ObjectReference) string {
|
|
return fmt.Sprintf("%s/%s", vsref.Namespace, vsref.Name)
|
|
}
|
|
|
|
// storeObjectUpdate updates given cache with a new object version from Informer
|
|
// callback (i.e. with events from etcd) or with an object modified by the
|
|
// controller itself. Returns "true", if the cache was updated, false if the
|
|
// object is an old version and should be ignored.
|
|
func storeObjectUpdate(store cache.Store, obj interface{}, className string) (bool, error) {
|
|
objName, err := keyFunc(obj)
|
|
if err != nil {
|
|
return false, fmt.Errorf("Couldn't get key for object %+v: %v", obj, err)
|
|
}
|
|
oldObj, found, err := store.Get(obj)
|
|
if err != nil {
|
|
return false, fmt.Errorf("Error finding %s %q in controller cache: %v", className, objName, err)
|
|
}
|
|
|
|
objAccessor, err := meta.Accessor(obj)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
if !found {
|
|
// This is a new object
|
|
glog.V(4).Infof("storeObjectUpdate: adding %s %q, version %s", className, objName, objAccessor.GetResourceVersion())
|
|
if err = store.Add(obj); err != nil {
|
|
return false, fmt.Errorf("error adding %s %q to controller cache: %v", className, objName, err)
|
|
}
|
|
return true, nil
|
|
}
|
|
|
|
oldObjAccessor, err := meta.Accessor(oldObj)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
objResourceVersion, err := strconv.ParseInt(objAccessor.GetResourceVersion(), 10, 64)
|
|
if err != nil {
|
|
return false, fmt.Errorf("error parsing ResourceVersion %q of %s %q: %s", objAccessor.GetResourceVersion(), className, objName, err)
|
|
}
|
|
oldObjResourceVersion, err := strconv.ParseInt(oldObjAccessor.GetResourceVersion(), 10, 64)
|
|
if err != nil {
|
|
return false, fmt.Errorf("error parsing old ResourceVersion %q of %s %q: %s", oldObjAccessor.GetResourceVersion(), className, objName, err)
|
|
}
|
|
|
|
// Throw away only older version, let the same version pass - we do want to
|
|
// get periodic sync events.
|
|
if oldObjResourceVersion > objResourceVersion {
|
|
glog.V(4).Infof("storeObjectUpdate: ignoring %s %q version %s", className, objName, objAccessor.GetResourceVersion())
|
|
return false, nil
|
|
}
|
|
|
|
glog.V(4).Infof("storeObjectUpdate updating %s %q with version %s", className, objName, objAccessor.GetResourceVersion())
|
|
if err = store.Update(obj); err != nil {
|
|
return false, fmt.Errorf("error updating %s %q in controller cache: %v", className, objName, err)
|
|
}
|
|
return true, nil
|
|
}
|
|
|
|
// GetSnapshotContentNameForSnapshot returns SnapshotData.Name for the create VolumeSnapshotContent.
|
|
// The name must be unique.
|
|
func GetSnapshotContentNameForSnapshot(snapshot *crdv1.VolumeSnapshot) string {
|
|
return "snapdata-" + string(snapshot.UID)
|
|
}
|
|
|
|
// IsDefaultAnnotation returns a boolean if
|
|
// the annotation is set
|
|
func IsDefaultAnnotation(obj metav1.ObjectMeta) bool {
|
|
if obj.Annotations[IsDefaultSnapshotClassAnnotation] == "true" {
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|