Thomas Mueller wrote:
i'm also thinking about using kvm and heartbeat togheter on a 2node
cluster.
Stack would be:
- drbd
- ocfs2
- libvirt (virsh)
- kvm with file backed storage
so far i experimented with an virsh ocf resouce agent. but only to start
and stop. no migration.
OK. One of the downsides of Xen HVM is that you can't do live migration
with the DRBD backend at present. That's the kind of thing that would
entice us to switch.
gotchas so far:
- ocfs2: fencing itself (two-node cluster problem... or my configuration
error)
- ocfs2: not integrated with heartbeat (i'm using debian, read about
rewrite of ocfs2 on ml to allow userspace clustering - april 2008)
- kvm: virtio devices (aka disk/network performance) are new (kernel >=
2.6.25)
- kvm: migration with virtio devices doesn't work yet
- debian: etch's libvirt/kvm somewhat too old (needs backporting)
i would say: not an out-of-the box solution.
Sounds quite painful. I think I will stick to trying to solve our Xen
problems for the moment!
cheers
Nick
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