Don't attempt to make and chmod subPath if it already exists

pkg/kubelet/kubelet_pods.go

@@ -58,6 +58,7 @@ import (
 	"k8s.io/kubernetes/pkg/kubelet/status"
 	kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
 	"k8s.io/kubernetes/pkg/kubelet/util/format"
+	"k8s.io/kubernetes/pkg/util"
 	"k8s.io/kubernetes/pkg/volume"
 	"k8s.io/kubernetes/pkg/volume/util/volumehelper"
 	"k8s.io/kubernetes/third_party/forked/golang/expansion"
@@ -145,6 +146,9 @@ func makeMounts(pod *v1.Pod, podDir string, container *v1.Container, hostName, h
 
 			hostPath = filepath.Join(hostPath, mount.SubPath)
 
+			if subPathExists, err := util.FileExists(hostPath); err != nil {
+				glog.Errorf("Could not determine if subPath %s exists; will not attempt to change its permissions", hostPath)
+			} else if !subPathExists {
 				// Create the sub path now because if it's auto-created later when referenced, it may have an
 				// incorrect ownership and mode. For example, the sub path directory must have at least g+rwx
 				// when the pod specifies an fsGroup, and if the directory is not created here, Docker will
@@ -160,6 +164,7 @@ func makeMounts(pod *v1.Pod, podDir string, container *v1.Container, hostName, h
 					return nil, err
 				}
 			}
+		}
 
 		// Docker Volume Mounts fail on Windows if it is not of the form C:/
 		containerPath := mount.MountPath