Encrypted root on-top-of-LVM partition fails to boot after upgrade

[timotheus2]

Before the release of 11.04, I was running Ubuntu (Alternative CD) 10.10 on an x86_64 CPU with an extensive list of packages installed.

All of my partitions are luks encrypted running on top of LVM2. It is not a single encrypted device with LVM2 running inside (the default setup). Why I chose this uncommon setup is beyond the point of this topic.

Some commands to explain my setup.


# sudo pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 kithlish-root-vg lvm2 a- 4.65g 0
/dev/sda3 kithlish-sys-vg lvm2 a- 460.73g 0

# sudo lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
root kithlish-root-vg -wi-ao 4.65g
home kithlish-sys-vg -wi-ao 180.00g
opt kithlish-sys-vg -wi-ao 70.00g
swap kithlish-sys-vg -wc-ao 10.00g
tc kithlish-sys-vg -wi-ao 80.73g
tmp kithlish-sys-vg -wi-ao 15.00g
usr kithlish-sys-vg -wi-ao 60.00g
var kithlish-sys-vg -wi-ao 45.00g

# cat /etc/crypttab
# <target name> <source device> <key file> <options>
crypt_root /dev/kithlish-root-vg/root none luks,retry=1
crypt_home /dev/kithlish-sys-vg/home /etc/cryptkey luks,retry=1
crypt_var /dev/kithlish-sys-vg/var /etc/cryptkey luks,retry=1
crypt_usr /dev/kithlish-sys-vg/usr /etc/cryptkey luks,retry=1
crypt_tmp /dev/kithlish-sys-vg/tmp /etc/cryptkey luks,retry=1
crypt_opt /dev/kithlish-sys-vg/opt /etc/cryptkey luks,retry=1
crypt_swap /dev/kithlish-sys-vg/swap /etc/cryptkey luks,retry=1

# cat /etc/cryptmount
#!/bin/sh
for name in home swap opt var usr tmp; do
/sbin/cryptsetup luksOpen --key-file /etc/cryptkey /dev/kithlish-sys-vg/${name} crypt_${name}
done

# grep -C 2 cryptmount /etc/init/*
/etc/init/mountall.conf-
/etc/init/mountall.conf-script
/etc/init/mountall.conf: /bin/sh /etc/cryptmount
/etc/init/mountall.conf-
/etc/init/mountall.conf- . /etc/default/rcS
As of Ubuntu 10.10, this setup was booting just fine. Upon the upgrade to 11.04, the booting completely failed. GRUB was not installed correctly and I had to boot a recovery CD and reinstall GRUB.

Currently, GRUB boots with the list of kernels.


# cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=/dev/mapper/crypt_root ro quiet splash vt.handoff=7
The 11.04 splash is displayed in VGA and the dots indicator moves for over 5 seconds. Then the boot process dumps to a BusyBox command prompt.

The following is the workaround to continue booting:

cryptsetup luksOpen /dev/mapper/kithlish--root--vg-root crypt_root
exit
Despite being able to boot, I would very much like to be able to have the Ubuntu splash prompt for a cryptroot password like it used to. I notice that 'update-grub' does not place the 'cryptroot' parameter in /boot/grub/grub.cfg, and I assume that is the issue.

I examined the initramfs to read the boot scripts. I tried modifying /etc/default/grub with the following and running 'update-grub'. The parameters were added to the boot sequence, but no behavior changed.

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash cryptroot=source=/dev/mapper/kithlish--root--vg-root,target=crypt_root"