Populate published node IDs in ListVolumesResponse

According to [1], this "helps the CO [container orchestrator] reconcile
the actual state when the volume may have been Unpublished from the node
out of band from the CO".

[1] container-storage-interface/spec#374

driver/controller.go

@@ -564,6 +564,9 @@ func (d *Driver) ListVolumes(ctx context.Context, req *csi.ListVolumesRequest) (
 				VolumeId:      vol.ID,
 				CapacityBytes: vol.SizeGigaBytes * giB,
 			},
+			Status: &csi.ListVolumesResponse_VolumeStatus{
+				PublishedNodeIds: []string{vol.ID},
+			},
 		})
 	}
 
@@ -609,6 +612,7 @@ func (d *Driver) ControllerGetCapabilities(ctx context.Context, req *csi.Control
 		csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT,
 		csi.ControllerServiceCapability_RPC_LIST_SNAPSHOTS,
 		csi.ControllerServiceCapability_RPC_EXPAND_VOLUME,
+		csi.ControllerServiceCapability_RPC_LIST_VOLUMES_PUBLISHED_NODES,
 	} {
 		caps = append(caps, newCap(cap))
 	}