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SOLVED: F10 Post install encrypt partition issue



On Thu, Nov 27, 2008 at 9:29 AM, Jason Smith <jvsmith digitalmatter us> wrote:
Hello,

I installed F10 last night. Install went file. The machine was previously running F9 with encrypted /root and /home. For the install on F10 did an install, not upgrade, and formatted /root. Left /home alone.

During the boot process I get prompted for the passphrase to unlock the encryption for /root. Once the system gets to the interactive boot process and does the check disks routine I do not get prompted to enter a passphrase to allow access to  the encrypted /home.

I get the following error then it drops me to a maintenance prompt.

Checking filesystems
/dev/mapper/luks-ce0ce45d5-c705-4fde-8f7d-a17172c39aae: clean, 125896/655370 files, 986044/2621311 blocks
fsck.ext3: No such file or directory while trying to open /dev/mapper/luks-d8590a73-6fd0-46e5-8135-3ad739f58f6c
/dev/mapper/luks-d8590a73-6fd0-46e5-8135-3ad739f58f6c:
The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an anternate superblock: e2fsck -b 8193 <dvice>

/boot: clean 36/26104 files, 17648/104388 blocks


*** An error occurred during the filesystem check.
*** Dropping you to a shell; the system will reboot
*** when you leave the shell
...

I've verified through in maintenance mode that /etc/crypttab looks fine and the same with /etc/fstab. I can unlock my encrypted /home by running cryptsetup luksOpen /dev/mapper/VGSys-LVHome luks-d8590a73-6fd0-46e5-8135-3ad739f58f6c and providing the passphrase. I then can mount /home. So I know things with that are good and the data is there. The problem is that during bootup it just doesn't prompt for the passphrase to unlock /home.

From what I can tell /etc/rc.sysinit is responsible for mount partitions and in the case of encrypted volumes asking for the passphrase. I'm wondering if this is a bug.

Any help is appreciated.

Here's what I had to do. I don't think I should of but I guess that just means that I will be filing a bug report. The problem had nothing to do concerning LUKS. It appears it had to do with how fcsk is run on bootup. Now I assume it had something to do with the fact that I am running LVM and LUKS, but I don't know. In the new /etc/crypttab that F10 created during the install was the following lines:

luks-ce0e45d5-c705-4fde-8f7d-a17172c39aae UUID=ce0e45d5-c705-4fde-8f7d-a17172c39aae none
luks-d8590a73-6fd0-46e5-8135-3ad739f58f6c UUID=d8590a73-6fd0-46e5-8135-3ad739f58f6c none

What I didn't see initially because I couldn't read fast enough was that fsck was complaining about not being able to find UUID=ce0e45d5-c705-4fde-8f7d-a17172c39aae. Once I commented some lines out of /etc/rc.sysinit and fooled around there. I was able to see that. So the change I made to /etc/crypttab was to remove the UUID and replace it with the direct position.

New /etc/crypttab
luks-ce0e45d5-c705-4fde-8f7d-a17172c39aae /dev/mapper/VGSys-LVRoot none
luks-d8590a73-6fd0-46e5-8135-3ad739f58f6c /dev/mapper/VGSys-LVHome none

After I made that change and put the original rc.sysinit in place the system booted up without issue. I was able to modify /etc/crypttab by booting off the install media and using the rescue mode. I did have to manually mount /.

Jason
--
Jason Smith
jvsmith at digitalmatter.us

Nations have recently been led to borrow billions for war;
no nation has ever borrowed largely for education.  Probably,
no nation is rich enough to pay for both war and civilization.
We must make our choice; we cannot have both.  
~Abraham Flexner

Education is a better safeguard of liberty than a standing army.
~Edward Everett

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