If you meet a problem when create instance with Volume then Instance created failed, you can use this workaround. The point is just increase timeout of Nova compute service when creating instance to 1h30m or 90minutes.
- Kolla Ansible Xena Deplyoment
nano /etc/kolla/nova-compute/nova.conf
[DEFAULT]
block_device_allocate_retries = 1800
block_device_allocate_retries_interval = 3
docker restart nova_compute