Hi to all the Eucalyptus community!! This is my firts post here.

I'm considering the idea of using eucalyptus to accomplish to this task: I'm wondering to create a cloud infrastructure as a backup solution for disaster recovery.

Suppose to have a webserver, running on a virtual machine in a some kind of virtual enviroment ( such as another private installation of eucalyptus, if necessary, but made to be a server consolidation solution) that can be addressed at www.acme.com with IP 123.45.67.89. Now suppose that a failure occurs, and you don't have necessary physical resources to make a local migration. So, I want to be able to migrate the most recent snapshot of that machine in that public eucalyptus infrastructure. Is it possible? Can Eucalyptus provide the functionalities necessary to achieve this goal?
Some issues seams to arise:
- can I migrate a custom vm snapshot on a eucalyptus enviroment?
- what kind of private infrastructure should I use? A common server consolidation solution (XenServer...) or another, private, installation of Eucalyptus? Think that this public infrastructure could be used from other private infrastructure as a backup solution.
- and most important: how can I guarantee that the migrated webserver will be addressed in the same way as before, so that any client could notices the foult? At first glance, I tought that a sort of VPN tunnel has to be used to guarantee that a machine, running on a specific domain, can be routed transparently in another remote network without changing the external routing information...a sort of join tunnel from the private to the public infrastructure.

So the question is: is Eucalyptus the answare? Maybe only partialy, and will be necessary some external module to develop... or, in the worst case, do I have to find another infrastructure solution?

Really thank's for your attanction :)