Just to clarify: the Cinder Gluster driver, which is comparable to the Cinder NFS driver, uses FUSE:
Unless I'm mistaken, bootable volumes with Nova will use libgfapi (if configured with qemu_allowed_storage_drivers), but the best ephemeral instances can do is store the instances on a GlusterFS mounted /var/lib/nova/instances.
We've also seen performance issues when running ephemeral instances on a glusterfs mounted directory. However, we're using the Gluster Cinder driver for volumes and have been mostly happy with it.
On Tue, Mar 24, 2015 at 9:22 AM, Joe Julian <joe@xxxxxxxxxxxxxxxx> wrote:
Nova ephemeral disks don't use libgfapi, only Cinder volumes.On March 24, 2015 7:27:52 AM PDT, marianna cattani <marianna.cattani@xxxxxxxxx> wrote:Openstack doesn't have vsdm, it should be a configuration option: "qemu_allowed_storage_drivers=gluster"But, however , the machine is generated with the xml that you see.Now I try to write to the OpenStack's mailing list .tnxM2015-03-24 15:14 GMT+01:00 noc <noc@xxxxxxxxxxxx>:On 24-3-2015 14:39, marianna cattani wrote:
> Many many thanks !!!!
>
> Mine is different !!!!
>
> :'(
>
> root@nodo-4:~# virsh -r dumpxml instance-0000002c | grep disk
> <disk type='file' device='disk'>
> <source
> file='/var/lib/nova/instances/ef84920d-2009-42a2-90de-29d9bd5e8512/disk'/>
> <alias name='virtio-disk0'/>
> </disk>
>
>
Thats a fuse connection. I'm running ovirt + glusterfs where vdsm is a
special version with libgfapi support. Don't know if Openstack has that too?
Joop
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