Minor changes

clusterman/commands/node.py

@@ -64,15 +64,11 @@ def scan(timeout):
     CONF.save()
 
 def check(timeout):
-    nodes_path=CONF.NODE_FILE
-    nodes=None
-    if os.path.exists(nodes_path):
-        with open(nodes_path) as f:
-            nodes=json.load(f)
-    else:
+    nodes=get_node_list()
+    if len(nodes) <= 0:
         print("Please perform a scan before")
         exit(0)
-    if not nodes == None:
+    # Perform ping check
     fail=False
     for ip in nodes:
         print("Contacting {}...".format(ip),end='')