From fc146770f60f87f8417148cb306e6ac0cf087d5f Mon Sep 17 00:00:00 2001
From: Rupak Ganguly <rupakg@gmail.com>
Date: Wed, 11 Jul 2012 19:21:35 -0400
Subject: [PATCH] Add attach and detach methods to the volume model using the
 compute service attribute.

---
 lib/fog/hp/models/block_storage/volume.rb | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/lib/fog/hp/models/block_storage/volume.rb b/lib/fog/hp/models/block_storage/volume.rb
index 81446b0ef..43c7b354c 100644
--- a/lib/fog/hp/models/block_storage/volume.rb
+++ b/lib/fog/hp/models/block_storage/volume.rb
@@ -43,9 +43,28 @@ module Fog
           self.status == 'available'
         end
 
+        # volume can be attached to only one server at a time
+        def attach(new_server_id, device)
+          requires :id
+          unless in_use?
+            data = connection.compute.attach_volume(new_server_id, id, device)
+            merge_attributes(:attachments => attachments << data.body['volumeAttachment'])
+            true
+          else
+            false
+          end
+        end
+
+        def detach
+          requires :id
+          if has_attachments?
+            connection.compute.detach_volume(server_id, id)
+          end
+          true
+        end
+
         def destroy
           requires :id
-
           connection.delete_volume(id)
           true
         end