Ubiquity: Manual partitioning: Add "physical volume for LVM", and make it possible to encrypt it

[David Hedlund]

The default volume group (VG) name in both Ubuntu, and Ubuntu Server is: ubuntu-vg

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Boot issue
* You cannot boot an Ubuntu (or Ubuntu Server) disk drive, if you have another disk drive attached with Ubuntu (or Ubuntu Server) installed.

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Disk mount issue in other distros

* In other distros that are usign other VG names: If you attach other disk drives that have identical VG names, they will not be mounted. And only one disk drive will be mounted if you are trying to mount them:

$ sudo apt-get install lvm2
$ reboot

Then:
$ sudo modprobe dm-mod
$ sudo vgchange -a y
  WARNING: VG name ubuntu-vg is used by VGs HW3PiJ-YN4Z-YlBb-IQin-CE00-1xnq-YKwsbc and 2afQMx-nuzj-xw8I-dEkY-n969-jM5v-zn1MSg.
  Fix duplicate VG names with vgrename uuid, a device filter, or system IDs.
  WARNING: activating multiple VGs with the same name is dangerous and may fail.
  1 logical volume(s) in volume group "ubuntu-vg" now active
  WARNING: activating multiple VGs with the same name is dangerous and may fail.
  device-mapper: create ioctl on ubuntu--vg-ubuntu--lv LVM-2afQMxnuzjxw8IdEkYn969jM5vzn1MSgnfgWV7d1tEfHHYXR33JuS7XxqMRcPgiB failed: Device or resource busy
  0 logical volume(s) in volume group "ubuntu-vg" now active

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Solution

For "Manual partitioning":
* Like in "Erase disk and install Ubuntu" option: 1) Add "physical volume for LVM" 2) Make it possible to encrypt it
* Add a default VG name, but make it possible to change it to avoid the issues described in the top of this issue.

[David Hedlund (g-public)]

Related: ubiquity no option to create new logical volumes - https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1302673

[David Hedlund (g-public)]

Debian 11 allows "physcial volume LVM" in manual partitioning.

[Dan Bungert (dbungert)]

Hi there, thanks for the report.

This looks like a regular bug, not security, so I'm moving this back to a Public information type bug.

[Steve Langasek (vorlon)]

Ubuntu is in the process of moving to a new desktop installer not based on ubiquity. Some Ubuntu flavors are still using ubiquity and they may want to continue feature development ubiquity, so I am not marking this bug as 'wontfix', but the chances of this happening are low.

Opening a task on subiquity, the new installer, where this is more likely to get implemented.

[Michael Hudson-Doyle (mwhudson)]

I'm not 100% sure what this is asking for but I think subiquity-the-server-installer supports this already (although perhaps there is a request to not use the same vg name each time in the guided flow?). The ubuntu desktop installer client does not though.