Mitaka openstack, use LVM to do cinder backend, can not delete cloud hard drive.

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Mitaka openstack, use LVM to do cinder backend, can not delete cloud hard drive.

I can create a cloud hard drive, mount the cloud hard drive, uninstall the cloud hard drive, but just can not delete the cloud hard drive.
Here is the log information for my volume:
2010-02-24 16: 03: 39.616 36006 INFO cinder.volume.manager [req-12577ede-8fa8-4952-a8d2-bfd828fd7e6b - - - - -] Starting volume driver LVMVolumeDriver (3.0.0)
2017-02-24 16: 03: 40.943 36006 INFO cinder.volume.manager [req-12577ede-8fa8-4952-a8d2-bfd828fd7e6b - - - - -] Driver initialization completed successfully.
2090-02-24 16: 03: 40.994 36006 INFO cinder.volume.manager [req-12577ede-8fa8-4952-a8d2-bfd828fd7e6b - - - - -] Initializing RPC dependent components of volume driver LVMVolumeDriver (3.0.0)
2017-02-24 16: 03: 41.338 36006 INFO cinder.volume.manager [req-12577ede-8fa8-4952-a8d2-bfd828fd7e6b - - - - -] Driver post RPC initialization completed successfully.
2011-02-24 16: 36: 34.417 36006 INFO cinder.volume.flows.manager.create_volume [req-6bd37753-1f77-4559-9a91-7451391454.91 eq. Eq. Fdr09123 Being created as raw with specification: {'status': u'creating', 'volume_size': 10, 'volume_name': 'volume-ec3ec443-3cfe-4ffa-9c6b-bc6f199d89b8'}
201-02-24 16: 36: 35.977 36006 INFO cinder.volume.flows.manager.create_volume [volume] -ment volume volume-ec3ec443-3cfe-4ffa-9c6b-2ci-9c6b- Bc6f199d89b8 (ec3ec443-3cfe-4ffa-9c6b-bc6f199d89b8): created successfully
Created volume successfully. Created volume successfully. Created volume successfully. Created volume successfully. Created volume successfully. Created volume successfully. Created volume successfully. Created volume over.
2013-02-24 16: 37: 03.149 36006 INFO cinder.volume.targets.iscsi [req-29888b64-81ca-4de5-9d46-90ef6f354665 epping of the tree is not too iscsi_target is presently exported for volume: ec3ec443- 3cfe-4ffa-9c6b-bc6f199d89b8
2019-02-24 16: 37: 03.459 36006 INFO cinder.volume.utils [req-29888b64-81ca-4de5-9d46-90ef6f354665 e95eac4dd3f1499bbced20dfe6b27f81 515e8d8470cc4373a21e304c2ba98eb6 - - -] Performing secure delete on volume: / dev / mapper / cinder -volume - ec3ec443 - 3cfe - 4ffa - 9c6b - bc6f199d89b