def attach_cdrom(self, datacenter_id, server_id, cdrom_id):
data = '<STR_LIT>' + cdrom_id + '<STR_LIT>'<EOL>response = self._perform_request(<EOL>url='<STR_LIT>' % (<EOL>datacenter_id,<EOL>server_id),<EOL>method='<STR_LIT:POST>',<EOL>data=data)<EOL>return response<EOL>
Attaches a CDROM to a server.

:param      datacenter_id: The unique ID of the data center.
:type       datacenter_id: ``str``

:param      server_id: The unique ID of the server.
:type       server_id: ``str``

:param      cdrom_id: The unique ID of the CDROM.
:type       cdrom_id: ``str``