[one-users] Does Opennebula 2.0.1 support disaster recovery?

[Tino Vazquez]

Hi,

comments inline,


On Fri, Feb 18, 2011 at 4:52 AM, Manikanta Kattamuri
<mani.kattamuri at hexagrid.com> wrote:
> we have tried some poc's to achieve this sometime back
>
> 2011/2/17 Tino Vazquez <tinova at 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.Ye at 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:imllorente at opennebula.org]
>> > Sent: Thursday, February 17, 2011 4:55 PM
>> > To: YE LEI
>> > Cc: users at 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.Ye at 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
>> >>
>> >> _______________________________________________
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>> >> Users at lists.opennebula.org
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>> >>
>> >>
>> >
>> >
>> >
>> > --
>> > Ignacio M. Llorente, PhD, MBA
>> > Project co-Lead and Director
>> > OpenNebula - The Open Source Toolkit for Cloud Computing
>> > www.OpenNebula.org | imllorente at opennebula.org
>> > _______________________________________________
>> > Users mailing list
>> > Users at lists.opennebula.org
>> > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>> >
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>
>
>
> --
> K Manikanta Swamy
> +919059014442
>