I also see these messages in cloud-init.log. The first set is for the first provision, and the second is after the first reboot:
[CLOUDINIT] cc_mounts.py[DEBUG]: Attempting to determine the real name of ephemeral0 [CLOUDINIT] cc_mounts.py[DEBUG]: Mapped metadata name ephemeral0 to /dev/disk/azure/resource [CLOUDINIT] cc_mounts.py[DEBUG]: changed default device ephemeral0 => /dev/disk/azure/resource-part1 [CLOUDINIT] cc_mounts.py[DEBUG]: Mapped metadata name ephemeral0 to /dev/sdb [CLOUDINIT] cc_mounts.py[DEBUG]: changed default device ephemeral0 => /dev/sdb1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1603222 Title: Azure: incorrect entry in fstab for ephemeral disk To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1603222/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs