When creating a virtual machine in the dashboard, create a volume and choose to delete the virtual machine while also deleting the volume. When deleting the virtual machine, there is no normal uninstallation of the volume and the volume is not deleted. The relevant error logs are shown in the image, but the openstack CLI can delete its volume. The specific commands are as follows. CLI： source /etc/keystone/admin-openrc.sh (Verify password file) openstack volume set --detached　191e555c-3947-4928-be46-9f09e2190877（volumeID） openstack volume delete 191e555c-3947-4928-be46-9f09e2190877（volumeID） It seems that Nova is unable to interact with the Cinder API to delete(or detached) commands, but I am not very professional. I don't know if it's a bug?