cinder get-capabilities , Only one backend volume stats and properties information can be obtained

[jialiang gao]

I configured two volume backend in a host, and retrieved the backend volume stats and properties information on this host through "cinder get-capabilities", which only showed the first volume backend status and properties information

stack@openstack:~$ cinder service-list
+------------------+-----------------------+------+---------+-------+----------------------------+-----------------+
| Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+------------------+-----------------------+------+---------+-------+----------------------------+-----------------+
| cinder-backup | openstack | nova | enabled | up | 2017-11-14T02:42:23.000000 | - |
| cinder-scheduler | openstack | nova | enabled | up | 2017-11-14T02:42:18.000000 | - |
| cinder-volume | openstack@ceph | nova | enabled | up | 2017-11-14T02:42:16.000000 | - |
| cinder-volume | openstack@lvmdriver-1 | nova | enabled | up | 2017-11-14T02:42:23.000000 | - |
+------------------+-----------------------+------+---------+-------+----------------------------+-----------------+

stack@openstack:~$ cinder get-capabilities openstack
+---------------------+--------------------------------------------------+
| Volume stats | Value |
+---------------------+--------------------------------------------------+
| description | None |
| display_name | None |
| driver_version | 3.0.0 |
| namespace | OS::Storage::Capabilities::openstack@lvmdriver-1 |
| pool_name | None |
| replication_targets | [] |
| storage_protocol | iSCSI |
| vendor_name | Open Source |
| visibility | None |
| volume_backend_name | lvmdriver-1 |
+---------------------+--------------------------------------------------+
+---------------------+----------------------------------------------------------------------------------------------------------------------------------+
| Backend properties | Value |
+---------------------+----------------------------------------------------------------------------------------------------------------------------------+
| compression | {u'type': u'boolean', u'description': u'\u542f\u7528\u538b\u7f29\u3002', u'title': u'Compression'} |
| qos | {u'type': u'boolean', u'description': u'\u542f\u7528 QoS\u3002', u'title': u'QoS'} |
| replication_enabled | {u'type': u'boolean', u'description': u'\u542f\u7528\u590d\u5236\u3002', u'title': u'Replication'} |
| thin_provisioning | {u'type': u'boolean', u'description': u'\u8bbe\u7f6e\u81ea\u52a8\u7cbe\u7b80\u914d\u7f6e\u3002', u'title': u'Thin Provisioning'} |
+---------------------+----------------------------------------------------------------------------------------------------------------------------------+