fuel does not provision software raid as shown in documentation

[Danil Akhmetov]

Documentation of fuel / MOS-8 says that RAID-1 spans all disks available on node, and there is a trick to exclude some disks of software raid-1: https://docs.mirantis.com/openstack/fuel/fuel-8.0/operations.html#how-to-exclude-some-drives-from-raid-1-array

Actually it never happens. Fuel-agent Nailgun driver always adds '/boot' volume as regular, even if volume['type'] == 'raid':

https://github.com/openstack/fuel-agent/blob/master/fuel_agent/drivers/nailgun.py#L488-L497

Also current version of fuel does not provide software raid at all by default.

[Alexander Gordeev (a-gordeev)]

initially, it was introduced to bypass mdadm metadata limitation on amount of components especially for centos.

https://github.com/openstack/fuel-agent/commit/524d6ff54b34195e02af0ddd085f9ffa921f3c3f

[Alexander Gordeev (a-gordeev)]

This bug is thoroughly connected with documentation. Starting since 7.0 and higher, Fuel doesn't provision software raid for /boot partition.

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: master
Change author: Mariia Zlatkova <email address hidden>
Review: https://review.fuel-infra.org/21182

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/21182
Submitter: Olga Gusarenko <email address hidden>
Branch: master

Commit: 68c21937ab36cd6cac00e79208d58eafbdb5b683
Author: Mariia Zlatkova <email address hidden>
Date: Tue May 24 12:49:36 2016

[Ops Guide] Remove a non-relevant how-to

Removes the "Exclude some drives from RAID-1 array" how-to
as it is no more relevant.

Change-Id: Icc0cc6dff83f01dfd9cffbf499b97431896662e7
Closes-Bug: #1569956

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: stable/8.0
Change author: Mariia Zlatkova <email address hidden>
Review: https://review.fuel-infra.org/21312

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: stable/7.0
Change author: Mariia Zlatkova <email address hidden>
Review: https://review.fuel-infra.org/21314

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/21312
Submitter: Olga Gusarenko <email address hidden>
Branch: stable/8.0

Commit: b860fc3e86774d82c11c230501d57c20fc201071
Author: Mariia Zlatkova <email address hidden>
Date: Thu May 26 15:51:35 2016

[Ops Guide] Remove a non-relevant how-to

Removes the "Exclude some drives from RAID-1 array" how-to
as it is no more relevant.

Change-Id: Icc0cc6dff83f01dfd9cffbf499b97431896662e7
Closes-Bug: #1569956
(cherry picked from commit 68c21937ab36cd6cac00e79208d58eafbdb5b683)

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/21314
Submitter: Olga Gusarenko <email address hidden>
Branch: stable/7.0

Commit: c12ab2ad6e6c0e5f1eb74aab4c5bb803a0fa9275
Author: Mariia Zlatkova <email address hidden>
Date: Thu May 26 15:53:15 2016

[Ops Guide] Remove a non-relevant how-to

Removes the "Exclude some drives from RAID-1 array" how-to
as it is no more relevant.

Change-Id: Icc0cc6dff83f01dfd9cffbf499b97431896662e7
Closes-Bug: #1569956
(cherry picked from commit 68c21937ab36cd6cac00e79208d58eafbdb5b683)