// deleteAllContentForGroupVersionResource will use the dynamic client to delete each resource identified in gvr.
// It returns an estimate of the time remaining before the remaining resources are deleted.
// If estimate > 0, not all resources are guaranteed to be gone.
func deleteAllContentForGroupVersionResource(
kubeClient clientset.Interface,
clientPool dynamic.ClientPool,
opCache operationNotSupportedCache,
gvr unversioned.GroupVersionResource,
namespace string,
namespaceDeletedAt unversioned.Time,
) (int64, error) {
glog.V(5).Infof("namespace controller - deleteAllContentForGroupVersionResource - namespace: %s, gvr: %v", namespace, gvr)
// estimate how long it will take for the resource to be deleted (needed for objects that support graceful delete)
estimate, err := estimateGracefulTermination(kubeClient, gvr, namespace, namespaceDeletedAt)
if err != nil {
glog.V(5).Infof("namespace controller - deleteAllContentForGroupVersionResource - unable to estimate - namespace: %s, gvr: %v, err: %v", namespace, gvr, err)
return estimate, err
}
glog.V(5).Infof("namespace controller - deleteAllContentForGroupVersionResource - estimate - namespace: %s, gvr: %v, estimate: %v", namespace, gvr, estimate)
// get a client for this group version...
dynamicClient, err := clientPool.ClientForGroupVersionResource(gvr)
if err != nil {
glog.V(5).Infof("namespace controller - deleteAllContentForGroupVersionResource - unable to get client - namespace: %s, gvr: %v, err: %v", namespace, gvr, err)
return estimate, err
}
// first try to delete the entire collection
deleteCollectionSupported, err := deleteCollection(dynamicClient, opCache, gvr, namespace)
if err != nil {
return estimate, err
}
// delete collection was not supported, so we list and delete each item...
if !deleteCollectionSupported {
err = deleteEachItem(dynamicClient, opCache, gvr, namespace)
if err != nil {
return estimate, err
}
}
// verify there are no more remaining items
// it is not an error condition for there to be remaining items if local estimate is non-zero
glog.V(5).Infof("namespace controller - deleteAllContentForGroupVersionResource - checking for no more items in namespace: %s, gvr: %v", namespace, gvr)
unstructuredList, listSupported, err := listCollection(dynamicClient, opCache, gvr, namespace)
if err != nil {
glog.V(5).Infof("namespace controller - deleteAllContentForGroupVersionResource - error verifying no items in namespace: %s, gvr: %v, err: %v", namespace, gvr, err)
return estimate, err
}
if !listSupported {
return estimate, nil
}
glog.V(5).Infof("namespace controller - deleteAllContentForGroupVersionResource - items remaining - namespace: %s, gvr: %v, items: %v", namespace, gvr, len(unstructuredList.Items))
if len(unstructuredList.Items) != 0 && estimate == int64(0) {
// if any item has a finalizer, we treat that as a normal condition, and use a default estimation to allow for GC to complete.
for _, item := range unstructuredList.Items {
if len(item.GetFinalizers()) > 0 {
glog.V(5).Infof("namespace controller - deleteAllContentForGroupVersionResource - items remaining with finalizers - namespace: %s, gvr: %v, finalizers: %v", namespace, gvr, item.GetFinalizers())
return finalizerEstimateSeconds, nil
}
}
// nothing reported a finalizer, so something was unexpected as it should have been deleted.
return estimate, fmt.Errorf("unexpected items still remain in namespace: %s for gvr: %v", namespace, gvr)
}
return estimate, nil
}
