Re: HA for Xen

[Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>]

On 03.10.2010 12:44, River Tarnell wrote:
> Hi,
> 
> I'm looking for a high-availability virtualisation host.  I will have two 
> hosts 
> connected to shared storage (via fibre channel), and I want VMs to 
> automatically failover to the other node if one node fails.
> 
> Is there any way to do this with NetBSD as the dom0?  Perhaps with Linux-HA?  
> (It seems like NetBSD doesn't support SCSI-3 PGR, so I'm wondering if this is 
> even possible at all...)

If you want a full NetBSD solution, I don't think that it is possible at
this time.

It depends on where and what you want for failover anyway, as there are
multiple solutions:
- have a NetBSD dom0 which does nothing except executing domUs, and have
heartbeat for each domU.
- for network failover, NetBSD has carp(4)
- if you want VM replication (Remus), this is not currently supported.
And I dare say that it can still be considered "experimental."

What is your intent? Have SCSI disks managed by dom0 (with FC), and
export them to domUs through a xen block interface?

-- 
Jean-Yves Migeon
jeanyves.migeon%free.fr@localhost