Hi, As I'm dealing with RHEV and OpenStack architectures , trying to develop a piece of code able to run on Hosts in both architecture, Is the vdsm hook mechanism similar in OpenStack and RHEV ? FYI, I use it to add a channel device on each Guest to exchange datas between this piece of code and its companion running on the Guest. Thanks for help. Regards, J.P. Ribeauville P: +33.(0).1.47.17.20.49 . Puteaux 3 Etage 5 Bureau 4 jpribeauville@axway.com<mailto:jpribeauville@axway.com> http://www.axway.com<http://www.axway.com/> P Pensez à l'environnement avant d'imprimer.