[CentOS] Xen, GFS, GNBD and DRBD?

[Tom Lanyon]

On 03/01/2008, at 9:55 AM, Ross S. W. Walker wrote:

>
> Take a look at iSCSI for the storage servers. iSCSI Enterprise  
> Target is what I use here and it works well for us.
>
> You don't really need shared filesystems if you are doing direct  
> block io to LVs or raw partitions as the Xen migration will handle  
> the hand-off, but you will if you are using flat files, because of  
> this I recommend using LVs or raw partitions as clustered  
> filesystems will put a serious overhead on the Xen guest io.
>
> -Ross

Ross,

I can use DRBD to mirror data between the two storage servers and  
iSCSI to export the block devices, but how will iSCSI cope with  
failure of one storage server?

Can I use heartbeat and CRM to failover the host IP and iSCSI target  
to the other storage server?

Regards,
Tom