[Gluster-users] Gluster 3.5 problems with libgfapi/qemu

[Ivano Talamo]

On 6/12/14 3:44 PM, Vijay Bellur wrote:
> On 06/11/2014 11:25 PM, Ivano Talamo wrote:
>> Hello,
>> I recently update 2 servers (Scientific Linux 6) with a replicate volume
>> from gluster 3.4 to 3.5.0-2.
>> The volume was previously used to host qemu/kvm VM images accessed via a
>> fuse-mounted mount-point.
>> Now I would like to use the libgfapi but I'm seeing this error:
>>
>> [root at cmsrm-service02 ~]# qemu-img info
>> gluster://cmsrm-service02/vol1/vms/disks/cmsrm-ui01.raw2
>> [2014-06-11 17:47:22.084842] E [afr-common.c:3959:afr_notify]
>> 0-vol1-replicate-0: All subvolumes are down. Going offline until atleast
>> one of them comes back up.
>> image: gluster://cmsrm-service03/vol1/vms/disks/cmsrm-ui01.raw2
>> file format: raw
>> virtual size: 20G (21474836480 bytes)
>> disk size: 4.7G
>> [2014-06-11 17:47:22.318034] E [afr-common.c:3959:afr_notify]
>> 0-vol1-replicate-0: All subvolumes are down. Going offline until atleast
>> one of them comes back up.
>>
>
> This is a benign error message. qemu-img initializes a glusterfs graph 
> through libgfapi, performs the operation and then cleans up the graph. 
> afr translator in glusterfs displays this log message as part of a 
> graph cleanup operation. IIRC, qemu displays all log messages on 
> stderr by default and hence this message is seen.
>
I thought this indeed, since the volume was fine after that and I could 
access it.

>> The error message does not appear if I access the file via the 
>> mount-point.
>>
>
> There should be no functional problem even if this message is seen.
>

Btw, I have problems starting the VM. the "virsh start <vm-name>" 
command remains waiting forever on a futex call.
The xml relevant section is:
     <disk type='network' device='disk'>
       <driver name='qemu' type='qcow2' cache='none'/>
       <source protocol='gluster' name='vol1/vms/disks/cmsrm-ui01.qcow2'>
         <host name='141.108.36.19' port='24007'/>
       </source>
       <target dev='vda' bus='virtio'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x05' 
function='0x0'/>
     </disk>







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