[libvirt-users] Oracle RAC in libvirt+KVM environment

[Timon Wang]

Hi all,

I found a article about Hyper-V virtual Fiber Channel, I think this
will make Failover Cluster work if KVM has the same feature.
http://technet.microsoft.com/en-us/library/hh831413.aspx

Hyper-V uses NPIV for virtual Fiber Channel, I have read some article
about KVM NPIV, but how can I config it with libvirt? Any body can
show me some example?


On Wed, Aug 14, 2013 at 2:33 PM, Timon Wang <timonwst at gmail.com> wrote:
> Thanks, i have tried virtio-scsi and LSI SCSI controller, by using a
> local file or a LUN as disk. Both raw and qcow2 disk format are be
> verified, but no way to make windows Failover Cluster and Oracle RAC
> work correctly.
>
> Actually, Oracle RAC and Windows Failover Cluster needs "share"
> storage like iscsi disk and fc disk to work correctly.
>
> In iscsi situation, we can use ip network for Failover Cluster "share"
> storage, but when we use fc as a high performance solution, we can't
> use fc "share" storage direct in VM(Not LUN passthrough).
>
> As I google the windows Failover Cluster requirements, I found that
> this issue may be that windows checks only iscsi and fc drivers, the
> type of the disk may be check by the driver type. In KVM situation, we
> can't emulate a iscsi/fc disk for VM to use, so we can't setup a
> environment like this.
>
> I'm wondering, if we want't to make sure the applications and service
> in the VM to always work, it's there another way to do this in KVM
> environment.
>
> On Tue, Aug 13, 2013 at 5:18 PM, Stefan Hajnoczi <stefanha at gmail.com> wrote:
>> On Mon, Aug 12, 2013 at 06:17:51PM +0800, Timon Wang wrote:
>>> Yes, SCSI bus likes pass through a shared LUN to the vm, and I am
>>> using a shared LUN for 'share' purpose.
>>>
>>> I found a post that vmware use lsilogic bus for the shared disk, but
>>> my qemu/kvm version can't support lsilogic bus.
>>>
>>> I'm tring to update qemu/kvm version for lsilogic bus support.
>>
>> Use virtio-scsi.  The emulated LSI SCSI controller has known bugs and is
>> not actively developed - don't be surprised if you hit issues with it.
>>
>> The question is still what commands RAC or Failover Clustering use.  If
>> you find that the software refuses to run, it could be because
>> additional work is required to make it work on KVM.
>>
>> Stefan
>
>
>
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