Ephemeral w/o FS gets added to fstab

This bug was originally filed in Launchpad as [LP: #1513109](https://bugs.launchpad.net/cloud-init/+bug/1513109)

Launchpad details

affected_projects = []

assignee = None

assignee_name = None

date_closed = None

date_created = 2015-11-04T15:23:39.414961+00:00

date_fix_committed = None

date_fix_released = None

id = 1513109

importance = medium

is_complete = False

lp_url = https://bugs.launchpad.net/cloud-init/+bug/1513109

milestone = None

owner = nhouse

owner_name = Nate House

private = False

status = confirmed

submitter = nhouse

submitter_name = Nate House

tags = []

duplicates = []

_Launchpad user **Nate House(nhouse)** wrote on 2015-11-04T15:23:39.414961+00:00_

Using a DS that includes ec2 metadata with an ephemeral disk, even if the ephemeral disk is not formatted with a filesystem, cc_mounts adds an fstab entry that is likely invalid and potentially breaking reboot in some cases. I've seen this affect Debian based images and if needing to reproduce, Rax OnMetal I/O flavor is a good candidate. We are adjusting the base images cloud config to avoid hitting this but, any other cloud providers that provision non-formatted ephemeral disks would likely have similar issues.