Comment 7 for bug 1060296

Scott Moser (smoser) wrote :

I dont know what else would be hitting /etc/mtab. I can easily set up an instance for you to poke around at.
cloud-init does run 'mount -a' after modifying /etc/fstab.

both the modifying of /etc/fstab and the invoking of 'mount -a' happens during the cloud-config job, which is:
  start on (filesystem and started rsyslog)

I would have thought that suitably late to not screw stuff up with mountall.