same my problem :

openstack hypervisor stats show

+----------------------+-------+
| Field                | Value |
+----------------------+-------+
| count                | 1     |
| current_workload     | 0     |
| disk_available_least | 115   |
| free_disk_gb         | 25    |
| free_ram_mb          | 5434  |
| local_gb             | 125   |
| local_gb_used        | 100   |
| memory_mb            | 7982  |
| memory_mb_used       | 2548  |
| running_vms          | 1     |
| vcpus                | 8     |
| vcpus_used           | 1     |
+----------------------+-------+


Although i have two lvm :
cinder get-pools --detail

+-----------------------------+---------------------------------------------+
| Property                    | Value                                       |
+-----------------------------+---------------------------------------------+
| QoS_support                 | False                                       |
| allocated_capacity_gb       | 0                                           |
| backend_state               | up                                          |
| driver_version              | 3.0.0                                       |
| filter_function             | None                                        |
| free_capacity_gb            | 171.0                                       |
| goodness_function           | None                                        |
| location_info               | LVMVolumeDriver:r2s13:cinder-volumes:thin:0 |
| max_over_subscription_ratio | 20.0                                        |
| multiattach                 | True                                        |
| name                        | r2s13@lvm#LVM_iSCSI                         |
| pool_name                   | LVM_iSCSI                                   |
| provisioned_capacity_gb     | 0.0                                         |
| reserved_percentage         | 0                                           |
| storage_protocol            | iSCSI                                       |
| thick_provisioning_support  | False                                       |
| thin_provisioning_support   | True                                        |
| timestamp                   | 2018-12-17T12:18:22.024282                  |
| total_capacity_gb           | 171.0                                       |
| total_volumes               | 1                                           |
| vendor_name                 | Open Source                                 |
| volume_backend_name         | LVM_iSCSI                                   |
+-----------------------------+---------------------------------------------+
+-----------------------------+----------------------------------------------+
| Property                    | Value                                        |
+-----------------------------+----------------------------------------------+
| QoS_support                 | False                                        |
| allocated_capacity_gb       | 100                                          |
| backend_state               | up                                           |
| driver_version              | 3.0.0                                        |
| filter_function             | None                                         |
| free_capacity_gb            | 321.67                                       |
| goodness_function           | None                                         |
| location_info               | LVMVolumeDriver:r2s13:cinder-volumes2:thin:0 |
| max_over_subscription_ratio | 20.0                                         |
| multiattach                 | True                                         |
| name                        | r2s13@lvm2#LVM_iSCSI                         |
| pool_name                   | LVM_iSCSI                                    |
| provisioned_capacity_gb     | 100.0                                        |
| reserved_percentage         | 0                                            |
| storage_protocol            | iSCSI                                        |
| thick_provisioning_support  | False                                        |
| thin_provisioning_support   | True                                         |
| timestamp                   | 2018-12-17T12:18:16.029000                   |
| total_capacity_gb           | 330.6                                        |
| total_volumes               | 2                                            |
| vendor_name                 | Open Source                                  |
| volume_backend_name         | LVM_iSCSI                                    |
+-----------------------------+----------------------------------------------+