Clean /run/kubernetes on kubeadm reset

cmd/kubeadm/app/cmd/reset.go

@@ -113,7 +113,7 @@ func (r *Reset) Run(out io.Writer) error {
 		fmt.Println("[reset] docker doesn't seem to be running, skipping the removal of running kubernetes containers")
 	}
 
-	dirsToClean := []string{"/var/lib/kubelet", "/etc/cni/net.d", "/var/lib/dockershim"}
+	dirsToClean := []string{"/var/lib/kubelet", "/etc/cni/net.d", "/var/lib/dockershim", "/var/run/kubernetes"}
 
 	// Only clear etcd data when the etcd manifest is found. In case it is not found, we must assume that the user
 	// provided external etcd endpoints. In that case, it is his own responsibility to reset etcd