Hi, comments inline,
On Fri, Feb 18, 2011 at 4:52 AM, Manikanta Kattamuri <mani.kattam...@hexagrid.com> wrote: > we have tried some poc's to achieve this sometime back > > 2011/2/17 Tino Vazquez <tin...@opennebula.org> >> >> Hi YE Lei, >> >> The first issue that I see here is the migration, since it is >> impossible to migrate a VM from a host that is down. >> >> What is possible is the reestablishment of the service in placeB, >> where the VM images should be previously placed (to avoid transferring >> them, although this is possible as well), so only the VM state (in the >> form of snapshots of memory, and deltas of what has changed in the >> disk images since the VM was up) needs to be transferred. This >> snapshots should reside in a shared filesystem (to avoid losing access >> when the host is down), or synced in placeB using DRDB for instance. > > > since place A and place B are quiet distant and we did not want to share the > same file system, we used rsync to keep the disks in check. if the file > system is a failure at place A then the latest image would used at placeB > else the images are synced before starting. >> >> OpenNebula at place A can detect that the hosts are down and start the >> reestablishment of the service talking with the OpenNebula at place B. >> This setup can be achieved with some minor adjustments to the >> out-of-the-box OpenNebula. >> > Can you give any pointers on this, as i have achieved it using a script > above oned to detect failures and request place B to start the vm's after > syncing with the current vm. I would like to know how oned can be configured > to talk to placeB ( i suspect you are talking about hooks?). I was talking about a new set of drivers to enable this kind of behavior. > >> >> For extra protection, the OpenNebula at placeA could be running two >> instances in different servers, to avoid the fail in the disaster >> recovery in case the OpenNebula front-end goes down. >> > isn't this being discussed in another thread about oned redundancy?. which > is presently not present in one. Sure, this is WIP Regards, -Tino -- Constantino Vázquez Blanco, MSc OpenNebula Major Contributor / Cloud Researcher www.OpenNebula.org | @tinova79 >> >> This is an interesting use case, we will be happy to provide >> assistance in the setup of this scenario. >> >> Best regards, >> >> -Tino >> >> -- >> Constantino Vázquez Blanco, MSc >> OpenNebula Major Contributor / Cloud Researcher >> www.OpenNebula.org | @tinova79 >> >> >> >> On Thu, Feb 17, 2011 at 10:22 AM, YE LEI <lei...@alcatel-sbell.com.cn> >> wrote: >> > For example, we have a product (in VM) running in the servers on placeA, >> > and in case disaster happens on placeA, all servers on placeA are >> > damaged, could opennebula migrate this product to the severs on >> > placeB(thousands miles away from placeA) which are managed by opennebula >> > in the cloud? >> > >> > Best Regards, >> > YE Lei >> > >> > -----Original Message----- >> > From: Ignacio M. Llorente [mailto:imllore...@opennebula.org] >> > Sent: Thursday, February 17, 2011 4:55 PM >> > To: YE LEI >> > Cc: users@lists.opennebula.org >> > Subject: Re: [one-users] Does Opennebula 2.0.1 support disaster >> > recovery? >> > >> > Please, could you elaborate on the use case for this? Which >> > functionality would you require? >> > >> > Thanks >> > >> > On Thu, Feb 17, 2011 at 7:58 AM, YE LEI <lei...@alcatel-sbell.com.cn> >> > wrote: >> >> Hello, >> >> >> >> As mentioned in the mail title, does Opennebula 2.0.1 support disaster >> >> recovery cross-regional? >> >> >> >> Best Regards, >> >> >> >> YE Lei >> >> >> >> _______________________________________________ >> >> Users mailing list >> >> Users@lists.opennebula.org >> >> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org >> >> >> >> >> > >> > >> > >> > -- >> > Ignacio M. Llorente, PhD, MBA >> > Project co-Lead and Director >> > OpenNebula - The Open Source Toolkit for Cloud Computing >> > www.OpenNebula.org | imllore...@opennebula.org >> > _______________________________________________ >> > Users mailing list >> > Users@lists.opennebula.org >> > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org >> > >> _______________________________________________ >> Users mailing list >> Users@lists.opennebula.org >> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > > > > -- > K Manikanta Swamy > +919059014442 > _______________________________________________ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org