[Bug 1281765] [NEW] FFE: maas support for hardware enabement kernels (HWE)

[Scott Moser]

Public bug reported:

[Description]
MAAS does not currently support installation of Hardware Enablement kernels [1].  This is essential function to support Ubuntu LTS releases of 12.04 and 14.04. 
  --
  [1] https://wiki.ubuntu.com/Kernel/LTSEnablementStack

[Proposed Changes]
The full design and implementation are not yet finalized.  The end result will allow users of maas to utilize the hardware enablement kernels for each of 
In order to support the HardwareEnablementStack effort, MAAS needs to allow the user to be able to Enlist, Commission, and Deploy systems with an HWE kernels.  For development and support purposes it also needs to allow site-customized kernels to be used.  This is essential when bringing up new hardwa
re that isn't fully supported in Ubuntu.

The general plan is to enhance the simple streams data that is available
on maas.ubuntu.com/images to list HWE kernels and also make it better
able to describe what "subarch" are supported by a given kernel.

We also plan to make "fat initramfs" available to support booting a
single ephemeral image with multiple different kernels.  This is
necessary because keeping a 1:1 relationship of kernel to ephemeral
image is not supporatable given the download size.  This is the reason
for the cloud-initramfs-tools task.

The MAAS team will work in conjuction with Ubuntu teams and other
Canonical teams to bring these features in.

** Affects: maas
     Importance: Undecided
         Status: New

** Affects: cloud-initramfs-tools (Ubuntu)
     Importance: High
         Status: New

** Affects: maas (Ubuntu)
     Importance: High
         Status: New

** Changed in: maas
    Milestone: None => 14.04

** Also affects: maas (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: cloud-initramfs-tools (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: cloud-initramfs-tools (Ubuntu)
    Milestone: None => ubuntu-14.04

** Changed in: maas (Ubuntu)
    Milestone: None => ubuntu-14.04

** Changed in: cloud-initramfs-tools (Ubuntu)
   Importance: Undecided => High

** Changed in: maas (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1281765

Title:
  FFE: maas support for hardware enabement kernels (HWE)

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