RAID/LVM configuration doesn't display drives in selection menu - expected MD_LEVEL

[computer_freak_8]

Trying to install 22.04 LTS Server from Live image. Both the subiquity version provided with the ISO and the "new" version it prompts to load from internet, appear to have this issue.

I can select items for a RAID/LVM volume, but they are not displayed; they show up as blank lines but the total size at the bottom changes as semi-blindly select/deselect them.

I'm not sure how to grab versions as specified since this is prior to having a working system.

Image of problem attached.

[Dan Bungert (dbungert)]

Would you upload a copy of what /var/log/installer/subiquity-server-debug.log points to?

[computer_freak_8 (j8t8b)]

Ahh, gotcha, I was able to transfer it via SSH, attached here.
This is a different run - but this installer crashed on its own after sitting overnight.

[Olivier Gayot (ogayot)]

Another report was opened by @nkshirsagar on GitHub (probert) after a customer case: https://github.com/canonical/probert/issues/125

Marking confirmed.

Nikhil also mentioned that

> udevadm does not show the MD_LEVEL information on an inactive RAID, which breaks the probe.

and a corresponding PR was opened: https://github.com/canonical/probert/pull/124

[nikhil kshirsagar (nkshirsagar)]

It's expected behavior for MD_LEVEL not to be set for inactive raid devices. Looking at 64-md-raid.rules,

# do not edit this file, it will be overwritten on update

SUBSYSTEM!="block", GOTO="md_end"

# handle md arrays
ACTION!="add|change", GOTO="md_end"
KERNEL!="md*", GOTO="md_end"

# partitions have no md/{array_state,metadata_version}, but should not
# for that reason be ignored.
ENV{DEVTYPE}=="partition", GOTO="md_ignore_state"

# container devices have a metadata version of e.g. 'external:ddf' and
# never leave state 'inactive'
ATTR{md/metadata_version}=="external:[A-Za-z]*", ATTR{md/array_state}=="inactive", GOTO="md_ignore_state" <==
TEST!="md/array_state", ENV{SYSTEMD_READY}="0", GOTO="md_end"
ATTR{md/array_state}=="|clear|inactive", ENV{SYSTEMD_READY}="0", GOTO="md_end"
LABEL="md_ignore_state"

IMPORT{program}="/sbin/mdadm --detail --export $devnode"
ENV{DEVTYPE}=="disk", ENV{MD_NAME}=="?*", SYMLINK+="disk/by-id/md-name-$env{MD_NAME}", OPTIONS+="string_escape=replace"
<SNIP>

LABEL="md_end"

So IMPORT{program}="/sbin/mdadm --detail --export $devnode" is skipped if the array is inactive.

[nikhil kshirsagar (nkshirsagar)]

https://github.com/canonical/probert/pull/124 is now merged.