Given the following configuration in cinder.conf:
[scaleio_cluster2]
iscsi_ip_address=x.x.x.x
san_ip=y.y.y.y
san_login=xxxxxx
san_password=xxxxxxxxxxx
sio_protection_domain_name=CLUSTER2
sio_storage_pool_name=CAPACITY-01
sio_storage_pools=CLUSTER2:PERFORMANCE-01,CLUSTER2:CAPACITY-01
volume_backend_name=scaleio_cluster2
volume_driver=cinder.volume.drivers.emc.scaleio.ScaleIODriver
san_thin_provision=false
$ cinder get-pools --detail
+-----------------------------+-----------------------------------------------------------------------------------------+
| Property | Value |
+-----------------------------+-----------------------------------------------------------------------------------------+
| QoS_support | True |
| allocated_capacity_gb | 0 |
| consistencygroup_support | True |
| driver_version | 2.0 |
| free_capacity_gb | 8208 |
| max_over_subscription_ratio | 10.0 |
| name | controller1@scaleio_cluster2#CLUSTER2:PERFORMANCE-01 |
| pool_name | CLUSTER2:PERFORMANCE-01 |
| provisioned_capacity_gb | 145144 |
| reserved_percentage | 0 |
| storage_protocol | scaleio |
| thick_provisioning_support | True |
| thin_provisioning_support | True |
| timestamp | 2017-06-19T18:11:17.252226 |
| total_capacity_gb | 153464 |
| vendor_name | EMC |
| volume_backend_name | scaleio_cluster2 |
+-----------------------------+-----------------------------------------------------------------------------------------+
+-----------------------------+--------------------------------------------------------------------------------------+
| Property | Value |
+-----------------------------+--------------------------------------------------------------------------------------+
| QoS_support | True |
| allocated_capacity_gb | 24 |
| consistencygroup_support | True |
| driver_version | 2.0 |
| free_capacity_gb | 6072 |
| max_over_subscription_ratio | 10.0 |
| name | controller1@scaleio_cluster2#CLUSTER2:CAPACITY-01 |
| pool_name | CLUSTER2:CAPACITY-01 |
| provisioned_capacity_gb | 170880 |
| reserved_percentage | 0 |
| storage_protocol | scaleio |
| thick_provisioning_support | True |
| thin_provisioning_support | True |
| timestamp | 2017-06-19T18:11:17.252226 |
| total_capacity_gb | 177008 |
| vendor_name | EMC |
| volume_backend_name | scaleio_cluster2 |
+-----------------------------+--------------------------------------------------------------------------------------+
$ openstack volume type show ssd1-zone2
+--------------------+-------------------------------------------------------------------+
| Field | Value |
+--------------------+-------------------------------------------------------------------+
| access_project_ids | None |
| description | |
| id | 1eda3c8a-ed56-475e-97d3-1bedb8ac3330 |
| is_public | True |
| name | ssd1-zone2 |
| properties | provisioning:type='thick', volume_backend_name='scaleio_cluster2' |
| qos_specs_id | None |
+--------------------+-------------------------------------------------------------------+
$ openstack volume create --type ssd1-zone2 --size 8 mchlumsky-test
+---------------------+--------------------------------------+
| Field | Value |
+---------------------+--------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| consistencygroup_id | None |
| created_at | 2017-06-19T18:12:27.966450 |
| description | None |
| encrypted | False |
| id | 2391a0c4-083b-43ca-b5f7-3f29665576fc |
| migration_status | None |
| multiattach | False |
| name | mchlumsky-test |
| properties | |
| replication_status | disabled |
| size | 8 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| type | ssd1-zone2 |
| updated_at | None |
| user_id | 6c20cdc6afb344deb2a47ad9b55969a4 |
+---------------------+--------------------------------------+
When we create a volume in the backend scaleio_cluster2, we would expect it to be in CLUSTER2:CAPACITY-01 however openstack reports it in CLUSTER2:PERFORMANCE-01 as seen by the os-vol-host-attr:host => controller1@scaleio_cluster2#CLUSTER2:PERFORMANCE-01 below.
$ openstack volume show 2391a0c4-083b-43ca-b5f7-3f29665576fc
+--------------------------------+-----------------------------------------------------------------------------------+
| Field | Value |
+--------------------------------+-----------------------------------------------------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| consistencygroup_id | None |
| created_at | 2017-06-19T18:12:27.000000 |
| description | None |
| encrypted | False |
| id | 2391a0c4-083b-43ca-b5f7-3f29665576fc |
| migration_status | None |
| multiattach | False |
| name | mchlumsky-test |
| os-vol-host-attr:host | controller1@scaleio_cluster2# |
| | CLUSTER2:PERFORMANCE-01 |
| os-vol-mig-status-attr:migstat | None |
| os-vol-mig-status-attr:name_id | None |
| os-vol-tenant-attr:tenant_id | c92e2cc91312478db83a753477be715a |
| properties | |
| replication_status | disabled |
| size | 8 |
| snapshot_id | None |
| source_volid | None |
| status | available |
| type | ssd1-zone2 |
| updated_at | 2017-06-19T18:12:28.000000 |
| user_id | 6c20cdc6afb344deb2a47ad9b55969a4 |
+--------------------------------+-----------------------------------------------------------------------------------+
Also, I forgot to mention that in the example, although openstack reports the volume created with os-vol-