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[Jérôme Gallard <jeronimo974@xxxxxxxxx>]

Hi,

Did you specified in your cinder.conf the volume_backend_name for each
backend section? Example:

[backend1]
...
volume_backend_name=...

Maybe this can help you:
http://docs.openstack.org/grizzly/openstack-block-storage/admin/content/multi_backend.html

Regards,
Jérôme

On Mon, Jul 8, 2013 at 2:50 PM, yatin kumbhare <yatinkumbhare@xxxxxxxxx> wrote:
> Hello Folks,
>
> I have cinder volume service, setup with both FC and ISCSI driver
> (multi-backend).
>
> Here's cinder.conf
>
> scheduler_host_manager=cinder.scheduler.host_manager.HostManager
> scheduler_default_filters=AvailabilityZoneFilter,CapacityFilter
> scheduler_default_weighers=CapacityWeigher
> scheduler_driver=cinder.scheduler.filter_scheduler.FilterScheduler
>
> enabled_backends=3PAR-ISCSI,3PAR-FC
>
> [3PAR-ISCSI]
> <backend creds>
>
> [3PAR-FC]
> <backend creds>
>
> $cinder-manage  host list
>
> host                            zone
> ask27                           nova
> ask27@3PAR-FC                   nova
> ask27@3PAR-ISCSI                nova
>
> $cinder extra-specs-list
> +--------------------------------------+-------+----------------------------------------------------------------------------+
> |                  ID                  |  Name |
> extra_specs                                 |
> +--------------------------------------+-------+----------------------------------------------------------------------------+
> | 08109e24-79e0-4d24-bb8b-f26c39c6f0e2 |   FC  |  {u'persona': u'11 -
> VMware', u'volume_backend_name': u'HP3PARFCDriver'}   |
> | b94d25b3-c022-4fb1-ba00-53ff9b6901e7 | ISCSI | {u'persona': u'11 -
> VMware', u'volume_backend_name': u'HP3PARISCSIDriver'} |
> +--------------------------------------+-------+----------------------------------------------------------------------------+
>
> now when,I create volume
>
> $cinder create --display-name vol99 --volume-type ISCSI 1
>
>
> $cinder show 15820d30-44ff-47e3-9dec-63921800e1b9
> +------------------------------+----------------------------------------------------------------------------------------------------------------------------------+
> |           Property           |
> Value                                                               |
> +------------------------------+----------------------------------------------------------------------------------------------------------------------------------+
> |         attachments          |
> []                                                                |
> |      availability_zone       |
> nova                                                               |
> |           bootable           |
> false                                                               |
> |          created_at          |
> 2013-07-08T06:33:02.186351
> |
> |     display_description      |
> None                                                               |
> |         display_name         |
> vol99                                                               |
> |              id              |
> 15820d30-44ff-47e3-9dec-63921800e1b9
> |
> |           metadata           | {u'CPG': u'ESX_CLUSTERS_RAID5_250GB_FC',
> u'3ParName': u'osv-FYINMET-R.Od7GOSGADhuQ', u'snapCPG':
> u'ESX_CLUSTERS_RAID5_250GB_FC'} |
> |    os-vol-host-attr:host     |
> ask27@3PAR-FC                                                         |
> | os-vol-tenant-attr:tenant_id |
> 9e27e1aded67424d895bf83a4026484d
> |
> |             size             |
> 1                                                                 |
> |         snapshot_id          |
> None                                                               |
> |         source_volid         |
> None                                                               |
> |            status            |
> available                                                             |
> |         volume_type          |
> FC                                                                |
> +------------------------------+----------------------------------------------------------------------------------------------------------------------------------+
>
>
> Inside cinder scheduler.log
>
> Filtered [host 'ask27@3PAR-ISCSI': free_capacity_gb: 245, host
> 'ask27@3PAR-FC': free_capacity_gb: 246] _schedule
> /usr/lib/python2.6/site-packages/cinder/scheduler/filter_scheduler.py:208
> Choosing WeighedHost [host: ask27@3PAR-FC, weight: 246.0] _schedule
> /usr/lib/python2.6/site-packages/cinder/scheduler/filter_scheduler.py:214
> Making asynchronous cast on cinder-volume.ask27@3PAR-FC...
>
> For volume-type ISCSI, host: ask27@3PAR-FC gets selected wrongly.
>
> Due to this nova volume-attach loads up wrong volume_driver to attach
> volume.
>
> I had already looked at bug list, there's nothing i could relate this to.
>
> Has anybody has seen this issue before?
>
>
> Thanks and Regards,
> Yatin Kumbhare
>
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