Adding the following snippet to /etc/cloud/cloud.cfg before rebooting for the first time seems to fix the issue, which supports my analysis.
datasource: Azure: disk_aliases: ephemeral0: /dev/disk/azure/resource
Adding the following snippet to /etc/cloud/ cloud.cfg before rebooting for the first time seems to fix the issue, which supports my analysis.
datasource: azure/resource
Azure:
disk_aliases:
ephemeral0: /dev/disk/