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Re: [Xen-API] redundant xcp server with drbd
Did you look at http://code.google.com/p/ganeti/ ?
- Support for Xen virtualization:
- Support for PVM and HVM instances
- Live migration support
- Virtual console (on PVM) or VNC (on HVM) to control instances
- Support for virtio or emulated devices
.....
- Disk management:
- Plain LVM volumes
- Files (from Ganeti 2.0)
- across-the-network raid1 (using DRBD) for quick recovery in case of physical system failure
- Instance disk partitioning supported from Ganeti 2.0
- Export/import mechanism for backup purposes or migration between clusters, or
-
Automated instance migration across clusters (since Ganeti 2.2)
Lucas de Souza Santos (ldss)
On Tue, Mar 6, 2012 at 2:11 PM, Andreas Balg <a.balg@xxxxxxxx> wrote:
Hi there maybe have a look at GlusterFs -
We have a running setup here (8 Nodes, 100 VMs) that share localstorage - but we use GlusterFS (running in Dom0 - yes something you should not do under no circumstances I know) instead of DRBD - and of course there is no iSCSI or other block-level storage in this set-up but NFS or just a BIG folder of apparently local Storage using native glusterFS that works well by now
- maybe you'll have alook at such an option ...
Gruss
Andreas Balg
Am Dienstag, 06. März 2012 11:22 CET, George Shuklin <george.shuklin@xxxxxxxxx> schrieb:
Good day.
We've tried that for internal laboratory. Problem: sometime drbd do
additional IO and making storage out of sync. We've spend few weeks on
this set up (primary/primary drbd, and iscsi export with LVMoISCSI SR),
but it getting unstable after some time, so we gave up.
On 06.03.2012 13:47, Denis Cardon wrote:
> Hello everyone,
>
> I wanted to know if any of you had some experience with building a
> redundant xcp/xenserver cluster based on drbd. In this setup I would
> like to avoid a separate iscsi SAN, and have replicated local storage.
>
> There are docs on the internet showing how to set up a dual primary
> drbd SR on xenserver/xcp. It works fine with live migration and all,
> but when trying disaster scenario, like severing the drbd replication
> link, one gets a split brain scenario that cannot be unsolved. It
> should be doable if xapi had a smart understanding of drbd, but
> currently it is just a SR like others. So it is a no-go for the time
> being.
>
> I also tried a drbd primary-secondary scenario, with re-export with
> iet iscsi target, but for the moment I have unresolved performance
> issues (will try also with scst target).
>
> So I wanted to know if any of you had any experience or hints with
> this kind of setup : a dual active/active XCP servers with local SR
> replicated with primary-secondary DRBD, re-exported with iscsi or aoe
> or whatever.
>
> Cheers,
>
> Denis Cardon
>
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