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jun50
Asked: 2021-08-25 06:38:49 +0800 CST

OpenStack node not booting after forced shutdown, ubuntu--vg-ubuntu--lv does not exist

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After forcibly rebooting my OpenStack compute & block storage node, it no longer boots; how can I fix this or recover its data?

Gave up waiting for root file system device. common problems:
 -Boot args (cat /proc/cmdline)
  - check rootdelay= (did the system wait long enough?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/mapper/ubuntu--vg-ubuntu--lv does not exist. Dropping to a shell!

BusyBox v1.30.1 (Ubuntu 1:1.30.1-4ubuntu6.3) built-in shell (ash)
Enter 'help' for a list of built-in commands.

(initramfs)
lvm ubuntu-20.04 openstack cinder initramfs

2 Answers

  1. Was self resolved.

    # guestmount -a /dev/mapper/cinder--volumes-volume--NAME -i --rw /mnt

    https://docs.openstack.org/image-guide/modify-images.html#guestmount

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  2. My system couldn't boot after an update and wasn't prompting me to enter my LUKS passphrase for my root partition. However, I was able to boot after a manual unlock.

    Note: Change /dev/vda3 to your root partition that contains Ubuntu.

    (initramfs) cryptsetup luksOpen /dev/vda3 ubuntu
            Enter passphrase: *****
(initramfs) exit

    The system boots.

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