Default hostname to name/alias when provisioning a new VM

Any time I provision a VM through AdminUI such as a native SmartOS zone and then SSH into the zone, the hostname is the UUID which makes for an unfriendly PS1 so I need to run mdata-get sdc:alias > /etc/nodename && reboot to change it but that won't persist across reprovisions. It seems like creating a VM via node-triton (CloudAPI) defaults the hostname to the VM name/alias so AdminUI should be consistent.

I also tried manually calling VMAPI after the VM was provisioned to update the hostname but according to the documentation hostname is not a field that can be updated.

[root@headnode (neptune) ~]# sdc-vmapi /vms/73d03c63-c00a-4c67-bc5c-3047eeb78312?action=update -X POST -d '{"hostname":"nginx"}'
HTTP/1.1 409 Conflict
Connection: close
Content-Type: application/json
Content-Length: 77
Date: Fri, 06 May 2022 19:09:57 GMT
Server: VMAPI/9.14.1
x-request-id: 9cd50b8b-8468-42d5-88f8-0f386a65a189
x-response-time: 19
x-server-name: 50172949-5150-42ba-967d-c1e3434820d9

{
  "code": "ValidationFailed",
  "message": "No VM parameters provided",
  "errors": []
}

Start at the AdminUI VM provisioning entry point and compare its hostname handling with node-triton through CloudAPI. Check the VMAPI hostname update behavior described in the issue, then verify that a newly provisioned VM uses its name or alias as the hostname and retains that value after reprovisioning.