[one-users] OpenNebula multi-site --- question

[Giovanni Ponti]

Il 17/01/2013 17:15, Ignacio M. Llorente ha scritto:
> Dear Giovanni,
>
> This is a very good question, which answer depends on the type and level
> of collaboration that you expect across the different sites. I envision
> three different architectures:
>
> - Loosely Coupled Federation: Each site has its own OpenNebula instance
> managed by its Admin team that exposes cloud APIs (OCCI/EC2) and GUIs.
> In this scenario you could share a single authentication mechanism so a
> user can have access to any of the clouds, or you could define a user
> space for each site. You could also install your own appliance
> marketplace to allow users to easily share appliances across sites.
>
> - Tightly Coupled Federation: Each site has its own OpenNebula instance,
> all of them are managed by the same Admin team, and you use the oZones
> component for federation. In this case you will provide your users with
> a single access point for all the zones and can allocate resources
> through Virtual Data Centers to different Departments/Projects, etc.
>
> - Hybrid Cloud Federation: Each site has its own OpenNebula instance
> managed by its Admin team that exposes cloud APIs (OCCI/EC2) and GUIs. A
> user can only access its primary site, and the access to remote clouds
> is performed by the cloudbursting functionality of OpenNebula which is
> managed by the administrator of the site, and in principle fully
> transparent to the user. This would require the adaptation of the cloud
> connector to support remote OpenNebula instances.
>
> I hope this helps,
>
> Thanks!
>

Thanks for your reply! Many aspects are clear now.

Nevertheless, I've a futher question regardering the vm 
migration/live-migration mechanism in a Tightly Coupled Federation, that 
seems to be the most suitable for our purposes.
In particular, what happens to the VMs deployed on physical nodes in a 
oZones if such resources go down? Is the system able to migrate VMs to 
another oZone that shares the same repository area?

Thanks again,
Giovanni



> On Thu, Jan 17, 2013 at 12:00 PM, Giovanni Ponti <giovanni.ponti at enea.it
> <mailto:giovanni.ponti at enea.it>> wrote:
>
>     I'm Giovanni Ponti, an ENEA researcher based in Portici Research Center.
>     One of my research interest is Cloud Computing, and I'm following
>     and organizing cloud experiences in ENEA-GRID.
>
>     We are planning to have a multi-site cloud envorinment among ENEA
>     computational centers (that are six). At the moment, we have
>     installed OpenNebula only in one site (i.e., Portici one), and we
>     are evaluating a further installation on another ENEA site.
>
>     My question regards the ways in which two (or more) OpenNebula
>     installation may communicate and/or interact to export a whole
>     integrated cloud enviroment. In particular, as I know that
>     OpenNebula provides several interfaces to export cloud facilities
>     and to perform remote action (e.g., OCCI), it is not particularly
>     clear how aspect ragardering virtual machines are handled, such as
>     vm migration among sites or other.
>
>     Thanks in advance for your reply(s)
>
>     Giovanni
>
>
>     --
>     Ing. Giovanni Ponti, PhD
>     UTICT-HPC
>     ENEA - C.R. Portici
>     P.le E. Fermi, 1 (Loc. Granatello)
>     80055 Portici (NA), Italy
>     phone : (+39) 081-7723564 <tel:%28%2B39%29%20081-7723564> | int.:
>     [89] 2564
>     fax   : (+39) 081-7723344 <tel:%28%2B39%29%20081-7723344>
>     email : giovanni.ponti at enea.it <mailto:giovanni.ponti at enea.it>
>     web   : http://www.afs.enea.it/gponti
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>
>
>
>
> --
> Ignacio M. Llorente, PhD, MBA
> Project Director
> OpenNebula - The Open Source Solution for Data Center Virtualization
> www.OpenNebula.org <http://www.OpenNebula.org> |
> imllorente at opennebula.org <mailto:imllorente at opennebula.org> | @OpenNebula

-- 
Ing. Giovanni Ponti, PhD
UTICT-HPC
ENEA - C.R. Portici
P.le E. Fermi, 1 (Loc. Granatello)
80055 Portici (NA), Italy
phone : (+39) 081-7723564 | int.: [89] 2564
fax   : (+39) 081-7723344
email : giovanni.ponti at enea.it
web   : http://www.afs.enea.it/gponti