libvirt users - Mar 2016 - Re: ceph and libxl errors attaching device

Dear,
   I need to attach some ceph (0.94.6) block devices to our openstack
(kilo) running instances (xen 4.4) .
   Nova is able to create volumes, attach a detach (alt least there are no
errors)
   The hypervisor can see the blockdevice:

    # rbd -p volumes ls
       volume-xxxxxxxx-7342-434b-9xx1-d046bcxxxxfd

     And the instance xml seems to be ok:

     .................
    <disk type='network' device='disk'>
      <driver name='qemu' type='raw'
cache='none'/>
      <auth username='cinder'>
        <secret type='ceph'
uuid='xxxxxxxx-e53a-4xx7-9bc9-9bcc41xxxxe4'/>
      </auth>
      <source protocol='rbd'
name='volumes/volume-xxxxxxxx-7342-434b-9xx1-d046bcxxxxfd'>
        <host name='10.10.3.1' port='6789'/>
        <host name='10.10.3.2' port='6789'/>
        <host name='10.10.3.3' port='6789'/>
      </source>
      <target dev='xvdd' bus='xen'/>
      <serial>xxxxxxxx-7342-434b-9xx1-d046bcxxxxfd</serial>
    </disk>

     But there is no way to attach the device to running machine, I only
see this error on libxl :

   libxl: debug: libxl.c:3538:libxl_device_disk_add: ao 0x7fe248006080:
create: how=(nil) callback=(nil) poller=0x7fe24000ce20
libxl: debug: libxl_device.c:251:libxl__device_disk_set_backend: Disk
vdev=xvdd spec.backend=qdisk
libxl: debug: libxl_event.c:618:libxl__ev_xswatch_deregister: watch
w=0x7fe248001780: deregister unregistered
libxl: debug: libxl_event.c:1591:libxl__ao_complete: ao 0x7fe248006080:
complete, rc=0
libxl: debug: libxl.c:3538:libxl_device_disk_add: ao 0x7fe248006080:
inprogress: poller=0x7fe24000ce20, flags=ic
libxl: debug: libxl_event.c:1563:libxl__ao__destroy: ao 0x7fe248006080:
destroy

   Seems like qdisk backend is not able to manage the volume

   Any idea?

-- 
############################################################################
Iban Cabrillo Bartolome
Instituto de Fisica de Cantabria (IFCA)
Santander, Spain
Tel: +34942200969
PGP PUBLIC KEY:
http://pgp.mit.edu/pks/lookup?op=get&search=0xD9DF0B3D6C8C08AC
############################################################################
Bertrand Russell:
*"El problema con el mundo es que los estúpidos están seguros de todo y los
inteligentes están llenos de dudas*"

On 03/02/2016 06:38 AM, Iban Cabrillo wrote:
> Dear,
>    I need to attach some ceph (0.94.6) block devices to our openstack
(kilo)
> running instances (xen 4.4) .
At minimum, you'll need the recently released libvirt 1.3.2, which contains
my
recent commit

http://libvirt.org/git/?p=libvirt.git;a=commit;h=fb2bd208e52bda2d329b95d9545baa8bf04558af

Note that I've only tested it with xen 4.6 and xen.git.

Regards,
Jim

Dear Jim,
  Thanks a lot! I was going crazy with this issue, having a look at your
commit I see this was not implemented yet
  At this moment the installed version of libvirt are:

 ii  libvirt-bin                         1.2.12-0ubuntu14.2~cloud0
    amd64        programs for the libvirt library
 ii  libvirt0                            1.2.12-0ubuntu14.2~cloud0
    amd64        library for interfacing with differen

I will pass your info to sysadmins to upgrade the machine.
Regards, I


2016-03-03 0:46 GMT+01:00 Jim Fehlig <jfehlig@suse.com>:
> On 03/02/2016 06:38 AM, Iban Cabrillo wrote:
> > Dear,
> >    I need to attach some ceph (0.94.6) block devices to our openstack
> (kilo)
> > running instances (xen 4.4) .
>
> At minimum, you'll need the recently released libvirt 1.3.2, which
> contains my
> recent commit
>
>
>
http://libvirt.org/git/?p=libvirt.git;a=commit;h=fb2bd208e52bda2d329b95d9545baa8bf04558af
>
> Note that I've only tested it with xen 4.6 and xen.git.
>
> Regards,
> Jim
>
>

-- 
############################################################################
Iban Cabrillo Bartolome
Instituto de Fisica de Cantabria (IFCA)
Santander, Spain
Tel: +34942200969
PGP PUBLIC KEY:
http://pgp.mit.edu/pks/lookup?op=get&search=0xD9DF0B3D6C8C08AC
############################################################################
Bertrand Russell:
*"El problema con el mundo es que los estúpidos están seguros de todo y los
inteligentes están llenos de dudas*"