Dynamic publishing and availability management of virtual machines in Virtual Organization

Nowadays, universities and research institutes are more and more feeling the need to establish collaboration networks for sharing skills, as well as material, human, software and virtualized resources. This refers to the idea of Virtual Organizations (VOs) which allow any user of a member organization to access technological and pedagogical resources available in another partner organization. However, this collaboration, most of the time, raises some concern for member organizations. Indeed, they are afraid not to be able to use their own resources when they need to. Information on resources availability is generally static, provided at a given moment. The presence management of virtual machines with the XMPP (Extensible Messaging and Presence Protocol) protocol presents limitations in the context of a collaborative network. So, the constraints identified in terms of resource sharing, instant availability and restrictions are the main obstacles to setting up such a virtual organization. This paper aims to propose and implement an application that manages dynamic discovery and availability of shared virtual machines. The proposed system manages in real time the presence of a resource and its availability in terms of its occupation or use. The system will also allow a member organization to make its resources available and enjoy priority on its resources in case it needs to use them.