[Bug 1292648] [NEW] cloud-init should check/format Azure empheral disks each boot

[Ben Howard]

Public bug reported:

On Windows Azure, the ephemeral disk should be treated as ephemeral per
boot, not per instance.

Microsoft has informed us that under the following conditions an ephemeral disk may disappear:
1. The user resizes the instance
2. A fault causes the instance to move from one physical host to another
3. A machine is shutdown and then started again

Essentially, on Azure, the ephemeral disk is extremely ephemeral. Users
who hit any of the above situations are discovering that /mnt is mount
with their default NTFS file system.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: cloud-init 0.7.5~bzr964-0ubuntu1 [modified: usr/lib/python2.7/dist-packages/cloudinit/config/cc_disk_setup.py usr/lib/python2.7/dist-packages/cloudinit/config/cc_final_message.py usr/lib/python2.7/dist-packages/cloudinit/config/cc_seed_random.py usr/lib/python2.7/dist-packages/cloudinit/sources/DataSourceAzure.py usr/lib/python2.7/dist-packages/cloudinit/sources/DataSourceCloudSigma.py usr/lib/python2.7/dist-packages/cloudinit/sources/DataSourceSmartOS.py]
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
Date: Fri Mar 14 17:53:20 2014
PackageArchitecture: all
SourcePackage: cloud-init
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: cloud-init (Ubuntu)
     Importance: Medium
     Assignee: Ben Howard (utlemming)
         Status: In Progress


** Tags: amd64 apport-bug trusty uec-images

** Changed in: cloud-init (Ubuntu)
     Assignee: (unassigned) => Ben Howard (utlemming)

** Changed in: cloud-init (Ubuntu)
       Status: New => In Progress

** Changed in: cloud-init (Ubuntu)
   Importance: Undecided => Medium

** Branch linked: lp:~utlemming/cloud-init/disk_setup_always.lp1292648

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Title:
  cloud-init should check/format Azure empheral disks each boot

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