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Old 03-25-2014, 08:44 PM   #1
LQ Newbie
Registered: Mar 2014
Location: New England, USA
Distribution: Hardened Gentoo
Posts: 4

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Question Dracut: Fails to unlock/mount LUKS after update


First, I apologize in advance if this is the wrong forum, first time posting on this board.

Distro: Hardened Gentoo

I have recently upgraded my bootloader from GRUB Legacy (0.97-r12) to GRUB2 (2.00_p5107-r2), my kernel from 3.9.9-hardened to 3.11.7-hardened-r1, and Dracut from 031-r1 to 036-r4. After this, I used dracut to create an initramfs for 3.11.7-hardened-r1. It now fails to mount my encrypted swap and home LVs. I have been troubleshooting this for about a day now and have hit a roadblock. No matter what I do I can't get them to mount. I still have my 3.9.9 kernel and initramfs in GRUB2, and those mount/unlock my home and swap without issue.

Examining the logs shows the difference but I can't seem to locate what settings might have changed.

New kernel & dracut log:
[    1.465737] dracut: dracut-036-r4
[    2.450423] dracut: luksOpen /dev/sda2 luks-cfdc5b46-0c38-4825-ad12-3cddf2685941  
[   14.703674] dracut: Scanning devices dm-0  for LVM logical volumes vg/swap vg/root
[   14.815655] dracut: inactive '/dev/vg/swap' [8.00 GiB] inherit
[   14.815918] dracut: inactive '/dev/vg/root' [128.00 GiB] inherit
[   14.816146] dracut: inactive '/dev/vg/home' [459.00 GiB] inherit
[   15.296564] dracut: Checking ext4: /dev/vg/root
[   15.296890] dracut: issuing e2fsck -a  /dev/vg/root
[   15.395030] dracut: /dev/vg/root: clean, 527502/8388608 files, 4252630/33554432 blocks
[   15.397705] dracut: Mounting /dev/vg/root with -o noatime,ro
[   15.552075] dracut: Mounted root filesystem /dev/mapper/vg-root
[   15.732521] dracut: Switching root
Old (functioning) kernel & dracut log:
[    3.261836] dracut: dracut-031-r1
[    4.102284] dracut: luksOpen /dev/sda2 luks-cfdc5b46-0c38-4825-ad12-3cddf2685941  
[   18.403140] dracut: Scanning devices dm-0  for LVM volume groups 
[   18.408544] dracut: Reading all physical volumes. This may take a while...
[   18.412908] dracut: Found volume group "vg" using metadata type lvm2
[   18.442946] dracut: 3 logical volume(s) in volume group "vg" now active
[   18.838639] dracut: Checking ext4: /dev/mapper/vg-root
[   18.838951] dracut: issuing e2fsck -a  /dev/mapper/vg-root
[   18.917471] dracut: /dev/mapper/vg-root: clean, 527792/8388608 files, 4248981/33554432 blocks
[   18.920099] dracut: Mounting /dev/mapper/vg-root with -o noatime,ro
[   19.085850] dracut: Mounted root filesystem /dev/mapper/vg-root
[   24.274358] dracut: Switching root
blkid from working config:
/dev/sda1: UUID="67b786de-c9bf-41f8-9947-5432e52a8b76" TYPE="ext2" 
/dev/sda2: UUID="cfdc5b46-0c38-4825-ad12-3cddf2685941" TYPE="crypto_LUKS" 
/dev/mapper/luks-cfdc5b46-0c38-4825-ad12-3cddf2685941: UUID="hSB8yP-H6wb-E2p4-6cWL-wMue-57Ly-awGoCo" TYPE="LVM2_member" 
/dev/mapper/vg-swap: UUID="31116bf1-a0f8-47e2-bbca-365abd0f47d4" TYPE="swap" 
/dev/mapper/vg-root: UUID="37b102b3-e34b-40f8-b396-89fdab6a2338" TYPE="ext4" 
/dev/mapper/vg-home: UUID="dca1437e-cab3-4224-ba9c-b5846bb9f0c8" TYPE="ext4"
cat /etc/fstab:
/dev/sda1               /boot           ext2            noauto,noatime                  1 2
/dev/vg/root            /               ext4            noatime                         0 1
/dev/vg/home            /home           ext4
/dev/vg/swap            none            swap            sw                              0 0
/dev/cdrom              /mnt/cdrom      auto            noauto,ro                       0 0

cat /boot/grub/grub.cfg:
cat /etc/dracut.conf:

I don't understand why it unlocks and mounts the root LV but not the swap or /home :/

Any help would be great!
Old 03-27-2014, 09:21 PM   #2
LQ Newbie
Registered: Mar 2014
Location: New England, USA
Distribution: Hardened Gentoo
Posts: 4

Original Poster
Rep: Reputation: Disabled

Narrowed the problem down to dracut failing to run lvchange on non-root LVs. Suggestions to rectify this appreciated... or if this should be a bug report, let me know so I can file it.

In the meantime, my current workaround is to add lvchange -aly vg/home && lvchange -aly vg/swap && swapon && mount /home to my /etc/kde/startup/ and umount /home to /etc/kde/shutdown/
Old 03-28-2014, 11:54 AM   #3
LQ Newbie
Registered: Mar 2014
Location: New England, USA
Distribution: Hardened Gentoo
Posts: 4

Original Poster
Rep: Reputation: Disabled

Solution found:

Problem was config option hostonly="yes" in /etc/dracut.conf. After commenting out, dracut-generated initramfs works as expected using both versions 0.34-r4 and 0.36-r4. See for more info.

Marking thread solved.


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