We also experience failure to mount ephemeral disk to /mnt in Yakkety (both with 0.7.8-15 and 0.7.8-49 prerelease).
Seems like a race condition, can't reproduce 100% of the time. the /etc/fstab is generated before the symlink /dev/disk/cloud /azure_resource-part1 and contains: cat /etc/fstab /dev/disk/cloud/azure_resource /mnt auto ... cloud-init logs - cloud-init[1177]: [CLOUDINIT] cc_mounts.py[DEBUG]: Attempting to determine the real name of ephemeral0 cloud-init[1177]: [CLOUDINIT] cc_mounts.py[DEBUG]: Mapped metadata name ephemeral0 to /dev/disk/cloud/azure_resource cloud-init[1177]: [CLOUDINIT] cc_mounts.py[DEBUG]: changed default device ephemeral0 => /dev/disk/cloud/azure_resource change time of relevant files - 2016-12-12 17:35:43.031397400 +0000 /etc/fstab 2016-12-12 17:35:43.067397400 +0000 /run/systemd/generator/mnt.mount 2016-12-12 17:35:43.175397400 +0000 /dev/disk/cloud/azure_resource -> ../../sdb 2016-12-12 17:35:43.223397400 +0000 /dev/disk/cloud/azure_resource-part1 -> ../../sdb1 systemctl cat mnt.mount ... [Mount] What=/dev/disk/cloud/azure_resource Where=/mnt ... -- 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/cloud-init/+bug/1603222/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs