we have tried some poc's to achieve this sometime back<br><br><div class="gmail_quote">2011/2/17 Tino Vazquez <span dir="ltr"><<a href="mailto:tinova@opennebula.org">tinova@opennebula.org</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi YE Lei,<br>
<br>
The first issue that I see here is the migration, since it is<br>
impossible to migrate a VM from a host that is down.<br>
<br>
What is possible is the reestablishment of the service in placeB,<br>
where the VM images should be previously placed (to avoid transferring<br>
them, although this is possible as well), so only the VM state (in the<br>
form of snapshots of memory, and deltas of what has changed in the<br>
disk images since the VM was up) needs to be transferred. This<br>
snapshots should reside in a shared filesystem (to avoid losing access<br>
when the host is down), or synced in placeB using DRDB for instance.<br></blockquote><div> </div><div>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.</div>
<div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
OpenNebula at place A can detect that the hosts are down and start the<br>
reestablishment of the service talking with the OpenNebula at place B.<br>
This setup can be achieved with some minor adjustments to the<br>
out-of-the-box OpenNebula.<br>
<br></blockquote><div>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?).</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
For extra protection, the OpenNebula at placeA could be running two<br>
instances in different servers, to avoid the fail in the disaster<br>
recovery in case the OpenNebula front-end goes down.<br>
<br></blockquote><div>isn't this being discussed in another thread about oned redundancy?. which is presently not present in one. </div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
This is an interesting use case, we will be happy to provide<br>
assistance in the setup of this scenario.<br>
<br>
Best regards,<br>
<br>
-Tino<br>
<font color="#888888"><br>
--<br>
Constantino Vázquez Blanco, MSc<br>
OpenNebula Major Contributor / Cloud Researcher<br>
<a href="http://www.OpenNebula.org" target="_blank">www.OpenNebula.org</a> | @tinova79<br>
</font><div><div></div><div class="h5"><br>
<br>
<br>
On Thu, Feb 17, 2011 at 10:22 AM, YE LEI <<a href="mailto:Lei.Ye@alcatel-sbell.com.cn">Lei.Ye@alcatel-sbell.com.cn</a>> wrote:<br>
> For example, we have a product (in VM) running in the servers on placeA,<br>
> and in case disaster happens on placeA, all servers on placeA are<br>
> damaged, could opennebula migrate this product to the severs on<br>
> placeB(thousands miles away from placeA) which are managed by opennebula<br>
> in the cloud?<br>
><br>
> Best Regards,<br>
> YE Lei<br>
><br>
> -----Original Message-----<br>
> From: Ignacio M. Llorente [mailto:<a href="mailto:imllorente@opennebula.org">imllorente@opennebula.org</a>]<br>
> Sent: Thursday, February 17, 2011 4:55 PM<br>
> To: YE LEI<br>
> Cc: <a href="mailto:users@lists.opennebula.org">users@lists.opennebula.org</a><br>
> Subject: Re: [one-users] Does Opennebula 2.0.1 support disaster<br>
> recovery?<br>
><br>
> Please, could you elaborate on the use case for this? Which<br>
> functionality would you require?<br>
><br>
> Thanks<br>
><br>
> On Thu, Feb 17, 2011 at 7:58 AM, YE LEI <<a href="mailto:Lei.Ye@alcatel-sbell.com.cn">Lei.Ye@alcatel-sbell.com.cn</a>><br>
> wrote:<br>
>> Hello,<br>
>><br>
>> As mentioned in the mail title, does Opennebula 2.0.1 support disaster<br>
>> recovery cross-regional?<br>
>><br>
>> Best Regards,<br>
>><br>
>> YE Lei<br>
>><br>
>> _______________________________________________<br>
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>><br>
>><br>
><br>
><br>
><br>
> --<br>
> Ignacio M. Llorente, PhD, MBA<br>
> Project co-Lead and Director<br>
> OpenNebula - The Open Source Toolkit for Cloud Computing<br>
> <a href="http://www.OpenNebula.org" target="_blank">www.OpenNebula.org</a> | <a href="mailto:imllorente@opennebula.org">imllorente@opennebula.org</a><br>
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