Update

app/controllers/application_controller.rb

@@ -2,7 +2,6 @@ class ApplicationController < ActionController::Base
   # Prevent CSRF attacks by raising an exception.
   # For APIs, you may want to use :null_session instead.
   # protect_from_forgery with: :exception
-  helper_method :volume_mount, :volume_unmount, :volume_create, :volume_delete, :volume_start, :volume_stop
 
   def get_conf
     @config = Hash.new

app/controllers/node_controller.rb

@@ -0,0 +1,15 @@
+class NodeController < ApplicationController
+  def index
+    @hosts = Array.new
+
+    if get_hosts.blank?
+      flash[:danger] = "Check Server"
+    else
+      @hosts = get_hosts
+    end
+  end
+
+  def get_hosts
+    return ['2', 'aaa', 'bbb', 'ccc']
+  end
+end

app/controllers/peer_controller.rb

@@ -1,20 +0,0 @@
-class PeerController < ApplicationController
-  def index
-    @hosts = Array.new
-    
-    if get_hosts.blank?
-      flash[:danger] = "Check Server"
-    else
-      @hosts = get_hosts
-      
-    end
-  end
-  
-  def get_hosts
-    file_str = `cat ` + @hostfile_path
-    hosts_str = file_str.split("hosts:")[1]
-    return hosts_str.split("\n")
-  end
-  
-  @hostfile_path = "../../../configure.conf"
-end