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[James Falcon <1695277@xxxxxxxxxxxxxxxxxx>]

Tracked in Github Issues as https://github.com/canonical/cloud-
init/issues/2916

** Bug watch added: github.com/canonical/cloud-init/issues #2916
   https://github.com/canonical/cloud-init/issues/2916

** Changed in: cloud-init
       Status: Confirmed => Expired

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https://bugs.launchpad.net/bugs/1695277

Title:
  cc_mounts should ensure_dir on lower, upper and workdir params

Status in cloud-init:
  Expired

Bug description:
  Ubuntu Trusty 14.04 machine that mounts an overlayfs at
  /var/spool/postfix, and this works great:

  fs_setup:
    - label: postfix
      device: /dev/xvde
      filesystem: ext4
  mounts:
  - [ /dev/xvde, /mnt/postfix-overlay ]
  - [ overlayfs, /var/spool/postfix, "overlayfs", "defaults,lowerdir=/var/spool/postfix,upperdir=/mnt/postfix-overlay", "0", "2" ]
  mount_default_fields: [ None, None, "auto", "defaults,nobootwait", "0", "2” ]

  Upgrading the system image to Xenial 16.04 causes the overlayfs to
  fail to mount with the error “missing ‘workdir’”.

  Turns out, between Trusty and Xenial, the “workdir” directory in
  overlayfs went from optional to mandatory, and now the system no
  longer deploys.

  What needs to happen is that after the fs_setup step that creates
  /mnt/postfix-overlay, but before the mounts section where the
  overlayfs is created, the workdir and upperdir directories need to be
  created on the /mnt/postfix-overlay disk as /mnt/postfix-
  overlay/upperdir and /mnt/postfix-overlay/workdir (or something)
  respectively.

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