[Bug 1789786] Re: SRU ledmon into Bionic

[Mathieu Trudel-Lapierre]

Sponsored the package.

Woodrow, for next SRU uploads like this (which is effectively a
backport), or for other SRUs, please update the version number to be
above the one already in the archive, but below the version number for
the next release. For example:

in bionic right now: 0.79-2build1
the SRU: 0.90-0ubuntu1~18.04.1
in cosmic: 0.90-0ubuntu1 

This way, upgrades to the next release will work and update the package
(even if the update is a no-op).

I used the following command to generate the source package:
debuild -S -d -v0.79-2build1

Please check in:
https://launchpadlibrarian.net/389573368/ledmon_0.90-0ubuntu1~18.04.1_source.changes
and
http://launchpadlibrarian.net/389573440/ledmon_0.79-2build1_0.90-0ubuntu1~18.04.1.diff.gz

To make sure I did not forget anything.

Thanks!

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Title:
  SRU ledmon into Bionic

Status in ledmon package in Ubuntu:
  Confirmed

Bug description:
  [Impact]
  The support for Intel VROC technology requires both kernel and userspace components. The kernel components have landed in 4.14 and are available in Bionic. In order for users to take advantage of VROC in their deployments, the following userspace packages are also needed in Bionic:

  ledmon - Enclosure LED Utilities
  Upstream project: https://github.com/intel/ledmon

  mdadm - tool to administer Linux MD arrays (software RAID)
  Upstream project: https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/

  This SRU is about ledmon; it is being handled in bug #1668126.

  This SRU falls under the hardware enablement category.

  [Test Case]
  1.Install mdadm and ledmon
  $ sudo apt install mdadm ledmon

  2.Follow the instruction to create a RAID0/1/10 volume from Intel HII,
  referm https://goo.gl/xwqqDs

  3.Make sure RAID already reassembled or not
    $cat /proc/mdstat
    $mdadm --detail-platform
    $mdadm --detail /dev/md12*
    $mdadm --detail /dev/md12*

  4.Try to partition or mount /dev/md126

  5.Use fio package to do performance test.

  More detailed testing can be executed if the appropriate hardware is
  available.

  [Regression Potential]
  The performance issue may be met under specific hardware with VROC support; We have to make the SRU work then we can explore more things further under bionic.

  [Other Info]
  There are several bugs related to bionic SRU:
  [1] https://bugs.launchpad.net/ubuntu/+source/ledmon/+bug/1760937
  [2] https://bugs.launchpad.net/timbuktu/+bug/1759225
  [3] https://bugs.launchpad.net/somerville/+bug/1667541

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