# File lib/fog/volume/openstack/requests/extend_volume.rb, line 5
        def extend_volume(volume_id, size)
          body = {'os-extend' => {'new_size' => size}}
          request(
            :expects => 202,
            :method  => 'POST',
            :path    => "volumes/#{volume_id}/action",
            :body    => Fog::JSON.encode(body)
          )
        end