Add attach_volume request method for block storage service.

lib/fog/hp/requests/compute/attach_volume.rb

@@ -0,0 +1,78 @@
+module Fog
+  module Compute
+    class HP
+      class Real
+
+        # Attach a block storage volume to an existing server
+        #
+        # ==== Parameters
+        # * server_id<~Integer> - Id of server to attach the volume to
+        # * volume_id<~Integer> - Id of the volume to be attached to the server
+        # * device<~String> - Device name that is the mount point that the volume will be attached to. e.g. /dev/sdf
+        #
+        # ==== Returns
+        # * response<~Excon::Response>:
+        #   * body<~Hash>:
+        #   * 'volumeAttachment'<~Hash>:
+        #     * <~Hash>
+        #       *  'volumeId':<~Integer>  - The volume id
+        #       *  'device':<~String>  - The name of the device
+        def attach_volume(server_id, volume_id, device)
+          data = { 'volumeAttachment' =>
+                   { 'volumeId' => volume_id,
+                     'device'   => device
+                   }
+                 }
+          response = request(
+            :body     => MultiJson.encode(data),
+            :expects  => 200,
+            :method   => 'POST',
+            :path     => "servers/#{server_id}/os-volume_attachments"
+          )
+          response
+        end
+
+      end
+
+      class Mock  # :nodoc:all
+
+        def attach_volume(server_id, volume_id, device)
+          response = Excon::Response.new
+          if server = self.data[:servers][server_id]
+            # mock the case when the volume is already attached to the server
+            if server['volumeAttachments'] && server['volumeAttachments'].select {|v| v['id'] == volume_id}
+              response.status = 400
+              response.body = '{"badRequest": {"message": "Volume status must be available", "code": 400}}'
+              raise(Excon::Errors.status_error({:expects => 200}, response))
+            else
+              resp_data = { "volumeAttachment" =>
+                            {
+                              "volumeId" => volume_id,
+                              "device" => device
+                            }
+                          }
+              response.body = resp_data
+              response.status = 200
+
+              data = {
+                        "device" => device,
+                        "serverId" => server_id,
+                        "id" => volume_id,
+                        "volumeId" => volume_id,
+                     }
+              if server['volumeAttachments']
+                server['volumeAttachments'] << data
+              else
+                server['volumeAttachments'] = [data]
+              end
+            end
+          else
+            raise Fog::Compute::HP::NotFound
+          end
+          response
+        end
+
+      end
+    end
+  end
+end