[Bug 2051338] Re: Subiquity with autoinstall cannot pick a storage and install with IMSM (Intel Matrix Storage Manager) firmware RAID

[Yao Wei]

Turned out that, in filesystem controllers, it only picks all disks
(without compound devices like RAID), so the layout mode only applies to
simple disk devices, not compound devices like RAID or LVM.  This I
guess is to prevent some issues like installing into non-bootable RAID,
setting up LVM over LVM for encryption setup, etc.

I've made the changes in the attachment in order to let auto layout
detect the RAID disks, without considering about the other compound
cases, therefore this patch is only a reference of my discovery and is
not for production.

For reference, this is the result I got from Intel VROC from the patched subiquity to list all devices before match:
2024-03-06 01:18:43,971 INFO subiquity.server.controllers.filesystem:1418 all devices.....
2024-03-06 01:18:43,971 INFO subiquity.server.controllers.filesystem:1419 [
 Raid(name='md125', raidlevel='raid0', devices={}, spare_devices={}, preserve=True, container=raid-md127, id='raid-md125'),
 Raid(name='md127', raidlevel='container', devices=[disk-nvme2n1, disk-nvme3n1], spare_devices=[], preserve=True, metadata='imsm', id='raid-md127'),
 Raid(name='md126', raidlevel='container', devices=[disk-nvme4n1, disk-nvme6n1], spare_devices=[], preserve=True, metadata='imsm', id='raid-md126'),
 Disk(serial='KXG50ZNV256G_NVMe_TOSHIBA_256GB_77HS107ITNTT_1', wwn='eui.000000000000001000080d02002ac166', nvme_controller=nvme-controller-nvme6, path='/dev/nvme6n1', preserve=True, id='disk-nvme6n1', type='disk'),
 Disk(ptable='gpt', serial='Micron_3400_NVMe_512GB_21122E618437_1', wwn='eui.000000000000000100a075212e618437', nvme_controller=nvme-controller-nvme5, path='/dev/nvme5n1', preserve=True, id='disk-nvme5n1', type='disk'),
 Disk(serial='PC_SN730_NVMe_WDC_256GB_20333A801561_1', wwn='eui.e8238fa6bf530001001b448b49132209', nvme_controller=nvme-controller-nvme2, path='/dev/nvme2n1', preserve=True, id='disk-nvme2n1', type='disk'),
 Disk(serial='PC_SN730_NVMe_WDC_256GB_20333A802075_1', wwn='eui.e8238fa6bf530001001b448b49132a14', nvme_controller=nvme-controller-nvme3, path='/dev/nvme3n1', preserve=True, id='disk-nvme3n1', type='disk'),
 Disk(ptable='gpt', serial='PC_SN810_NVMe_WDC_512GB_23092V800479', path='/dev/sda', preserve=True, id='disk-sda', type='disk'),
 Disk(ptable='gpt', serial='PM9C1a_Samsung_256GB_______S75JNE0W700023_1', wwn='eui.002538a7310004c9', nvme_controller=nvme-controller-nvme0, path='/dev/nvme0n1', preserve=True, id='disk-nvme0n1', type='disk'),
 Disk(ptable='gpt', serial='PM9C1a_Samsung_256GB_______S75JNE0W700056_1', wwn='eui.002538a7310004ea', nvme_controller=nvme-controller-nvme1, path='/dev/nvme1n1', preserve=True, id='disk-nvme1n1', type='disk'),
 Disk(serial='THNSN5256GPUK_NVMe_TOSHIBA_256GB_X65S11JQT18T_1', wwn='eui.00080d0200113fc5', nvme_controller=nvme-controller-nvme4, path='/dev/nvme4n1', preserve=True, id='disk-nvme4n1', type='disk')
 ]


** Patch added: "subiquity-layout-compound.patch"
   https://bugs.launchpad.net/oem-priority/+bug/2051338/+attachment/5753022/+files/subiquity-layout-compound.patch

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https://bugs.launchpad.net/bugs/2051338

Title:
  Subiquity with autoinstall cannot pick a storage and install with IMSM
  (Intel Matrix Storage Manager) firmware RAID

Status in OEM Priority Project:
  New
Status in subiquity:
  Triaged

Bug description:
  We encountered a situation the when IMSM is enabled, with autoinstall
  to automatically pick a disk to install to, it would fail to pick the
  correct storage.

  Using Ubuntu Server it could pick and install into the virtual RAID
  device manually

  To reduce possible error scope, the test was under ubuntu server noble daily build (20240125). Log attached with the following:
  /var/log/installer
  journalctl log
  autoinstall.yaml

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