[Bug 1568918] Re: Add support for lts-xenial kernel flavours in trusty

[Scott Moser]

The linked branch  lp:~smoser/maas-images/trunk.hwe-x does the needed config changes in maas-images.
You can build your own maas-images and point your maas at fairly easily.
To build:
  # prep system for building
  bzr branch lp:~smoser/maas-images/trunk.hwe-x
  cd trunk.hwe-x
  ./system-setup

  # build for specific arch / release
  burl=http://cloud-images.ubuntu.com/daily/server/
  arch="amd64"
  rel=trusty
  serial=$(date --utc "+%Y%m%d")
  meph2-build amd64 trusty $serial $burl/$rel/current/$rel-server-cloudimg-$arch-root.tar.xz $rel-$arch-output.d
  
given the above, you'll then have a directory named 
  trusty-amd64-output.d/

And you can point maas at that as ephemeral image source.  Note, because
it is not signed, you have to provide the full path to the index.json
file (<PATH>/streams/v1/index.json).  I'm not sure off the top of my
head how maas merges multiple streams or what happens with that, but
this *will* produce a stream with trusty and hwe-x kernels.

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https://bugs.launchpad.net/bugs/1568918

Title:
  Add support for lts-xenial kernel flavours in trusty

Status in maas-images:
  Confirmed
Status in Ubuntu CD Images:
  Confirmed
Status in debian-installer package in Ubuntu:
  Confirmed
Status in livecd-rootfs package in Ubuntu:
  Confirmed
Status in debian-installer source package in Trusty:
  Confirmed
Status in livecd-rootfs source package in Trusty:
  Confirmed

Bug description:
  Subject says it all. We need d-i to support installing the lts-xenial
  kernel, as we did with the lts backports in precise.

  Test-case would be to try the xenial-* installers to make sure they
  install the right kernel (and at all!), and to test the non-vivid
  variants to make sure they didn't regress in installing the proper
  kernels.

  Related bugs:
   * bug 1524366:  Add support for lts-wily kernel flavours in trusty 
   * bug 1511497: [maas] No hwe-w kernel for 14.04

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