[Bug 1573982] Re: LVM boot problem - volumes not activated after upgrade to Xenial

[Eric Desrochers]

After investigation the problem is inside pvscan itself

I test with and without this commit and it does the trick.
Without I can reproduce, with I can't.

I'll provide a test package for impacted user to provide feedback before
I upload anything in the archive.

---
commit 15da467b52465076a8d587b94cc638bab8a0a95c
Author: David Teigland <teigland at redhat.com>
Date: Wed Jun 15 14:19:18 2016 -0500

pvscan: do activation when lvmetad is not running

When pvscan --cache -aay fails to connect to lvmetad it will
simply exit and do nothing. Change this so that it will
skip the lvmetad cache step and do the activation step from
disk.
---

- Eric

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to lvm2 in Ubuntu.
https://bugs.launchpad.net/bugs/1573982

Title:
  LVM boot problem - volumes not activated after upgrade to Xenial

Status in curtin:
  Incomplete
Status in MAAS:
  Incomplete
Status in lvm2 package in Ubuntu:
  Confirmed

Bug description:
  Soon after upgrade to Xenial (from 15.10) the boot process got broken.
  I'm using LVM for /root swap and other partitions.

  ===
  The current behaviour is:

  When I boot short after the Grub login screen I'm getting log messages
  like:

  ---
  Scanning for Btrfs filesystems
  resume: Could not state the resume device file: '/dev/mapper/VolGroup....'
  Please type in the full path...
  ---

  Then I press ENTER, for a few minutes some errors about floppy device
  access are raised (for some reason it tries to scan fd0 when floppy
  drive is empty). And then:

  ---
  Gave up waiting for root device. Common problems: ...
  ...
  ALERT! UUID=xxx-xxx.... does not exist.
  Dropping to a shell.
  ---

  From the BusyBox shell I managed to recover the boot by issuing "lvm
  vgchange -ay", then exit and then boot continues fine (all LVM file
  systems are successfully mounted).

  ===
  One workaround so far is creating /etc/initramfs-tools/scripts/local-top/lvm2-manual script doing "lvm vgchange -ay". But I'm looking for cleaner solution.

  Boot used to work fine with 15.10. Actually the first boot after
  upgrading to Xenial actually worked OK too, I'm not sure what might
  changed meanwhile (I've been fixing some packages installation since
  mysql server upgrade has failed).

  ===
  # lsb_release -rd
  Description:	Ubuntu 16.04 LTS
  Release:	16.04

To manage notifications about this bug go to:
https://bugs.launchpad.net/curtin/+bug/1573982/+subscriptions