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[James Falcon <1351821@xxxxxxxxxxxxxxxxxx>]

Tracked in Github Issues as https://github.com/canonical/cloud-
init/issues/2470

** Bug watch added: github.com/canonical/cloud-init/issues #2470
   https://github.com/canonical/cloud-init/issues/2470

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

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https://bugs.launchpad.net/bugs/1351821

Title:
  cloud-init resource disk handling conflicts with waagentlinux

Status in cloud-init:
  Expired

Bug description:
  While running Ubuntu 14.04 Trusty on Microsoft Azure, I got the fstab
  mangling bug described here:

  * http://askubuntu.com/questions/405442/how-can-i-disable-cloud-init

  This happened because the ResourceDisk.MountPoint=/tmp option was set
  in the /etc/waagent.conf file, and this line was in the /etc/fstab
  file:

       /dev/sdb1  /tmp  ext4  defaults,noauto  0  2

  From a deallocated start only,  cloud-init incorrectly rewrites the
  resource disk line to this:

       /dev/sdb1  /mnt  auto  defaults,nobootwait,comment=cloudconfig  0
  2

  Reformatting behavior also seems to be irregular.  Sometimes the
  resource disk is mounted as NTFS.  Sometimes a double mount happens
  like this:

       # mount
       /dev/sdb1 on /tmp type ext4 (rw)
       /dev/sdb1 on /mnt type ext4 (rw,_netdev)

  Expected behavior is:

  1.  Features provided by the Windows Azure Agent for Linux are not overridden by cloud-init.
  2.  The /etc/fstab file is never changed after VM creation.
  3.  The resource disk is not forced onto /mnt.
  4.  The resource disk is unconditionally reformatted to ext4 at system start, preferably with the ^has_journal option for maximum performance.  Trying to keep it intact across reboots is inconsistent with its purpose and most of the pertinent documentation.

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