Speakers
Victor Manuel Fernandez Albor
(Universidade de Santiago de Compostela (ES))
Victor Mendez Munoz
(Port d'Informació Científica (PIC))
Description
The increasing availability of cloud resources is making the
scientific community to consider a choice between Grid and Cloud.
The DIRAC framework for distributed computing is an easy way
to obtain resources from both systems.
In this paper we explain the integration of DIRAC with a two
Open-source Cloud Managers, OpenNebula and CloudStack.
They are computing tools to manage the complexity and
heterogeneity of distributed data center infrastructures
which allow to create virtual clusters on demand including
public, private and hybrid clouds.
This approach requires to develop an extension to the
previous DIRAC Virtual Manager Server, developed for
Amazon EC2, allowing the connection with the cloud
managers.
In the OpenNebula case, the development has been based
on the CERN Virtual Machine image with appropriate
contextualization, while in the case of CloudStack, the
infrastructure has been kept more general allowing other
Virtual Machine sources and operating systems.
In both cases, CernVM File System has been used to
facilitate software distribution to the computing nodes.
With the resulting infrastructure, users are allowed to use
cloud resources transparently through a friendly interface like
DIRAC Web Portal.
The main purpose of this integration is a system that can
manage cloud and grid resources at the same time. Users
from different communities do not need to care about the
installation of the standard software that is available
at the nodes, nor the operating system of the host machine
which is transparent to the user. In this paper we analyse
the overhead of the virtual layer, with some tests comparing
the proposed approach with the existing Grid solution.
Primary authors
Ricardo Graciani Diaz
(University of Barcelona (ES))
Victor Manuel Fernandez Albor
(Universidade de Santiago de Compostela (ES))
Victor Mendez Munoz
(Port d'Informació Científica (PIC))
Co-authors
Adrian Casajus Ramo
(University of Barcelona (ES))
Gonzalo Merino Arevalo
(Centro de Investigaciones Energ. Medioambientales y Tecn. - (ES)
Juan Jose Saborido Silva
(Universidade de Santiago de Compostela (ES))
