Missing dm-thin-pool Causes LXD LVM Failure
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| cloud-init (Ubuntu) |
Fix Committed
|
Undecided
|
Unassigned | ||
| Jammy |
Fix Committed
|
Undecided
|
Unassigned | ||
| Noble |
Fix Committed
|
Undecided
|
Unassigned | ||
| Oracular |
Won't Fix
|
Undecided
|
Unassigned | ||
Bug Description
Summary:
Missing dm-thin-pool.ko causes LXD failure.
1) Release
root@jammy-vm:~# lsb_release -rd
Description: Ubuntu Jammy Jellyfish (development branch)
Release: 22.04
2) Package
root@jammy-vm:~# apt-cache policy linux-modules-
linux-modules-
Installed: 5.15.0-1002.2
Candidate: 5.15.0-1002.2
Version table:
*** 5.15.0-1002.2 500
500 http://
100 /var/lib/
3) What I expect to happen
The following command should succeed.
lxd init --auto --storage-
4) What happened:
Lxd's default lvm storage backend fails on linux-kvm due to missing dm-thin-pool.ko.
Output:
root@jammy-vm:~# uname -a
Linux jammy-vm 5.15.0-1002-kvm #2-Ubuntu SMP Wed Feb 9 10:14:12 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
root@jammy-vm:~# modinfo dm-thin-pool
modinfo: ERROR: Module dm-thin-pool not found.
root@jammy-vm:~# lxd init --auto --storage-
Error: Failed to create storage pool 'default': Error creating LVM thin pool named "LXDThinPool": Failed to run: lvcreate --yes --wipesignatures y --poolmetadatasize 1G --thinpool default/LXDThinPool --extents 100%FREE: modprobe: FATAL: Module dm-thin-pool not found in directory /lib/modules/
/sbin/modprobe failed: 1
thin-pool: Required device-mapper target(s) not detected in your kernel.
Run `lvcreate --help' for more information.
I haven't found any -kvm kernels yet that have this kmod, so I suspect a backport of the fix will be required to supported releases.
| affects: | linux-kvm (Ubuntu Jammy) → cloud-init (Ubuntu Jammy) |
| Brett Holman (holmanb) wrote | #1 |
| Changed in cloud-init (Ubuntu Jammy): | |
| status: | New → Fix Committed |
| Changed in cloud-init (Ubuntu Noble): | |
| status: | New → Fix Committed |
| Changed in cloud-init (Ubuntu Oracular): | |
| status: | New → Fix Committed |
| tags: | added: kernel-daily-bug |
| Ural Tunaboyu (uralt) wrote | #2 |
| Changed in cloud-init (Ubuntu Oracular): | |
| status: | Fix Committed → Won't Fix |
This behavior is expected in ubuntu-minimal, but should not occur in non-minimal images. This is actually an issue in cloud-init on some versions of cloud-init. The fix was just committed[1] to upstream and should be available in the 24.4 release.
[1] https:/