Update

app/controllers/node_controller.rb

@@ -3,11 +3,10 @@ class NodeController < ApplicationController
     def index
         @hosts = Array.new
         @nodes = Node.all.order("id asc")
-    
         @node_connects = Array.new
         node_info = Hash.new
+        begin
             one_node = Node.take
-    
             node_info["Hostname"] = one_node.host_name
             node_info["State"] = "Peer in Cluster Disconnected"
             node_info = Hash.new
@@ -39,10 +38,9 @@ class NodeController < ApplicationController
             else
                 @hosts = get_hosts
             end
+        rescue => ex
+            puts ex
         end
-
-  def get_hosts
-    return ['2', 'aaa', 'bbb', 'ccc']
     end
 
     def node_add

app/helpers/application_helper.rb

@@ -1,4 +1,5 @@
 module ApplicationHelper
+    require 'net/ping'
 
     def get_df
         df = Array.new
@@ -136,4 +137,8 @@ module ApplicationHelper
         return files
     end
 
+    def ping_test?(host)
+      check = Net::Ping::External.new(host)
+      return check.ping?
+    end
 end

app/helpers/node_helper.rb

@@ -1,7 +1,2 @@
 module NodeHelper
-  require 'net/ping'
-  def ping_test?(host)
-    check = Net::Ping::External.new(host)
-    check.ping?
-  end
 end

app/views/home/index.html.erb

@@ -105,7 +105,7 @@
 
 		<!-- file manager -->
 		<div class="col-md-8 col-sm-8 col-xs-12">
-			<div class="panel panel-body">
+			<div id="pagecontent" class="panel panel-body">
 				<div class="x_title" id="file_manager_title_div">
 					<h2 style="width:130px">File Manager</h2>
 				</div>
@@ -353,6 +353,9 @@ $(document).on("click", "#file_manager_div .chdir", function(){
 		method : "post",
 		url : "/home/chdir",
 		data : { next_dir : next_dir },
+		beforeSend : function(){
+			Pace.start();
+		},
 		success : function(result){
 			$("#current_dir").val(next_dir);
 			$("#file_manager_title_div").empty().append("<h2 style='width:130px'>File manager</h2>");
@@ -362,6 +365,7 @@ $(document).on("click", "#file_manager_div .chdir", function(){
 
 			draw_datatable();
 			draw_chart(result.du);
+			Pace.stop();
 		}
 	})
 })
@@ -379,6 +383,9 @@ $(document).on("click", "#file_manager_div .chupper", function(){
 		method : "POST",
 		url : "/home/chdir",
 		data : { next_dir : next_dir },
+		beforeSend : function(){
+			Pace.start();
+		},
 		success : function(result){
 			$("#current_dir").val(next_dir);
 			$("#file_manager_title_div").empty().append("<h2 style='width:130px'>File manager</h2>");
@@ -388,6 +395,7 @@ $(document).on("click", "#file_manager_div .chupper", function(){
 
 			draw_datatable();
 			draw_chart(result.du);
+			Pace.stop();
 		}
 	})
 })

app/views/volume/index.html.erb

@@ -87,11 +87,21 @@
         </div>
     </div>
     <div class="clearfix"></div>
+    <% nodes = Node.all %>
+    <% if nodes.length == 0 %>
+    <div class="row animated flipInX col-md-6 col-sm-9 col-xs-12">
+        <div class="alert alert-info" role="alert">
+            <span class="glyphicon glyphicon-bell" area-hidden="true"></span>
+            <span class="glyphicon-class">You don't have a node. Please add nodes to do something in this page.</span>
+        </div>
+    </div>
+    <% else %>
     <div class="row">
         <% volumes.each_with_index do |volume, index| %>
         <%= raw volume_info(volume, index) %>
         <% end %>
     </div>
+    <% end %>
 </div>
 <!-- /page content -->