func (gc *GarbageCollector) patchObject(item objectReference, patch []byte) (*runtime.Unstructured, error) {
fqKind := schema.FromAPIVersionAndKind(item.APIVersion, item.Kind)
client, err := gc.clientPool.ClientForGroupVersionKind(fqKind)
gc.registeredRateLimiter.registerIfNotPresent(fqKind.GroupVersion(), client, "garbage_collector_operation")
resource, err := gc.apiResource(item.APIVersion, item.Kind, len(item.Namespace) != 0)
if err != nil {
return nil, err
}
return client.Resource(resource, item.Namespace).Patch(item.Name, api.StrategicMergePatchType, patch)
}
func (gc *GarbageCollector) deleteObject(item objectReference) error {
fqKind := schema.FromAPIVersionAndKind(item.APIVersion, item.Kind)
client, err := gc.clientPool.ClientForGroupVersionKind(fqKind)
gc.registeredRateLimiter.registerIfNotPresent(fqKind.GroupVersion(), client, "garbage_collector_operation")
resource, err := gc.apiResource(item.APIVersion, item.Kind, len(item.Namespace) != 0)
if err != nil {
return err
}
uid := item.UID
preconditions := v1.Preconditions{UID: &uid}
deleteOptions := v1.DeleteOptions{Preconditions: &preconditions}
return client.Resource(resource, item.Namespace).Delete(item.Name, &deleteOptions)
}
// apiResource consults the REST mapper to translate an <apiVersion, kind,
// namespace> tuple to a metav1.APIResource struct.
func (gc *GarbageCollector) apiResource(apiVersion, kind string, namespaced bool) (*metav1.APIResource, error) {
fqKind := schema.FromAPIVersionAndKind(apiVersion, kind)
mapping, err := gc.restMapper.RESTMapping(fqKind.GroupKind(), apiVersion)
if err != nil {
return nil, fmt.Errorf("unable to get REST mapping for kind: %s, version: %s", kind, apiVersion)
}
glog.V(6).Infof("map kind %s, version %s to resource %s", kind, apiVersion, mapping.Resource)
resource := metav1.APIResource{
Name: mapping.Resource,
Namespaced: namespaced,
Kind: kind,
}
return &resource, nil
}
func (obj *MyWeirdCustomEmbeddedVersionKindField) GroupVersionKind() schema.GroupVersionKind {
return schema.FromAPIVersionAndKind(obj.APIVersion, obj.ObjectKind)
}
// GroupVersionKind satisfies the ObjectKind interface for all objects that embed TypeMeta
func (obj *TypeMeta) GroupVersionKind() schema.GroupVersionKind {
return schema.FromAPIVersionAndKind(obj.APIVersion, obj.Kind)
}
func (obj *ExternalType2) GroupVersionKind() schema.GroupVersionKind {
return schema.FromAPIVersionAndKind(obj.APIVersion, obj.Kind)
}
func (obj *ObjectReference) GroupVersionKind() schema.GroupVersionKind {
return schema.FromAPIVersionAndKind(obj.APIVersion, obj.Kind)
}
func (obj *MyAPIObject) GroupVersionKind() schema.GroupVersionKind {
return schema.FromAPIVersionAndKind(obj.TypeMeta.APIVersion, obj.TypeMeta.Kind)
}
func (gc *GarbageCollector) processItem(item *node) error {
// Get the latest item from the API server
latest, err := gc.getObject(item.identity)
if err != nil {
if errors.IsNotFound(err) {
// the Propagator can add "virtual" node for an owner that doesn't
// exist yet, so we need to enqueue a virtual Delete event to remove
// the virtual node from Propagator.uidToNode.
glog.V(6).Infof("item %v not found, generating a virtual delete event", item.identity)
event := &event{
eventType: deleteEvent,
obj: objectReferenceToMetadataOnlyObject(item.identity),
}
glog.V(6).Infof("generating virtual delete event for %s\n\n", event.obj)
gc.propagator.eventQueue.Add(&workqueue.TimedWorkQueueItem{StartTime: gc.clock.Now(), Object: event})
return nil
}
return err
}
if latest.GetUID() != item.identity.UID {
glog.V(6).Infof("UID doesn't match, item %v not found, generating a virtual delete event", item.identity)
event := &event{
eventType: deleteEvent,
obj: objectReferenceToMetadataOnlyObject(item.identity),
}
glog.V(6).Infof("generating virtual delete event for %s\n\n", event.obj)
gc.propagator.eventQueue.Add(&workqueue.TimedWorkQueueItem{StartTime: gc.clock.Now(), Object: event})
return nil
}
ownerReferences := latest.GetOwnerReferences()
if len(ownerReferences) == 0 {
glog.V(6).Infof("object %s's doesn't have an owner, continue on next item", item.identity)
return nil
}
// TODO: we need to remove dangling references if the object is not to be
// deleted.
for _, reference := range ownerReferences {
if gc.absentOwnerCache.Has(reference.UID) {
glog.V(6).Infof("according to the absentOwnerCache, object %s's owner %s/%s, %s does not exist", item.identity.UID, reference.APIVersion, reference.Kind, reference.Name)
continue
}
// TODO: we need to verify the reference resource is supported by the
// system. If it's not a valid resource, the garbage collector should i)
// ignore the reference when decide if the object should be deleted, and
// ii) should update the object to remove such references. This is to
// prevent objects having references to an old resource from being
// deleted during a cluster upgrade.
fqKind := schema.FromAPIVersionAndKind(reference.APIVersion, reference.Kind)
client, err := gc.clientPool.ClientForGroupVersionKind(fqKind)
if err != nil {
return err
}
resource, err := gc.apiResource(reference.APIVersion, reference.Kind, len(item.identity.Namespace) != 0)
if err != nil {
return err
}
owner, err := client.Resource(resource, item.identity.Namespace).Get(reference.Name)
if err == nil {
if owner.GetUID() != reference.UID {
glog.V(6).Infof("object %s's owner %s/%s, %s is not found, UID mismatch", item.identity.UID, reference.APIVersion, reference.Kind, reference.Name)
gc.absentOwnerCache.Add(reference.UID)
continue
}
glog.V(6).Infof("object %s has at least an existing owner, will not garbage collect", item.identity.UID)
return nil
} else if errors.IsNotFound(err) {
gc.absentOwnerCache.Add(reference.UID)
glog.V(6).Infof("object %s's owner %s/%s, %s is not found", item.identity.UID, reference.APIVersion, reference.Kind, reference.Name)
} else {
return err
}
}
glog.V(2).Infof("none of object %s's owners exist any more, will garbage collect it", item.identity)
return gc.deleteObject(item.identity)
}
func (obj *Config) GroupVersionKind() schema.GroupVersionKind {
return schema.FromAPIVersionAndKind(obj.APIVersion, obj.Kind)
}