On 03/25/2011 10:26 PM, Marcin M. Jessa wrote:
Hi.
Over the last several days I've been reading, asking questions,
searching the Internet to find a viable HA stack for Ubuntu with KVM
virtualization and shared iSCSI storage. And I'm nearly as confused as
when I started.
Basically I'm trying to build a KVM enviroment with an iSCSI SAN and
I'm not quite sure what approach to use for storing the virtual guests.
What I understand to get max speed I should install directly to iSCSI
exported raw devices instead of backing disks.
I'm not sure creating many small LUNs, one for each of the guests is a
good idea.
Would it be better to create just one big LUN and then use LVM to
devide it and assign one "chunk" for each of the guests?
In the same setup I would also like to implement some kind of
automatic failover so if one of the KVM hosts is down I could
automatically move guests over to the other one. Or just perform live
migration and move one of the guest over to a different host with
spare capacity.
What would be the best approach to implement a solution like that?
One LUN per image allows you to implement failover, LVM doesn't (but
cluster-LVM does). I recommend using one LUN per image; it's much simpler.
--
error compiling committee.c: too many arguments to function
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