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Wizumwalt
Guru
Joined: 20 Aug 2006
Posts: 547
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 Posted: Thu Aug 22, 2013 1:34 am Post subject: LUKS + LVM2 - /usr not mounting |
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I'm doing an LVM2 + LUKS install and when I boot my system. Here is the error I'm seeing when I boot. Note that the root fs does mount.
| Code: |
>> Scanning for and activating Volume Groups
6 logical volume(s) in volume group "vg1" now active
Enter passphrase for /dev/vg1/root:
>> LUKS device /dev/vg1/root opened
>> Determining root device ...
>> Mounting /dev/mapper/root as root ...
>> Using mount -t ext4 -o ro
>> Mounting /dev/mapper/crypt-usr as /usr: mount -t ext4 -o noatime,ro /dev/mapper/crypt-usr /newroot/usr
mount: mounting /dev/mapper/crypt-user on /newroot/usr failed: No such file or directory
!! Unable to mount /dev/mapper/crypt-usr for /usr
>> Booting (initramfs)
INIT: version 2.88 booting
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And here is the contents of /dev/vg1 ...
| Code: |
dev
`- vg1
|- home -> /dev/mapper/vg1-home
|- opt -> /dev/mapper/vg1-opt
|- root -> /dev/mapper/vg1-root
|- tmp -> /dev/mapper/vg1-tmp
|- usr -> /dev/mapper/vg1-usr
`- var -> /dev/mapper/vg1-var
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... and in /dev/mapper ...
| Code: |
dev
`- mapper
|- root
|- vg1-home
|- vg1-opt
|- vg1-root
|- vg1-tmp
|- vg1-usr
`- vg1-var
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So I compare the above with the contents of the same directories after booting with a livecd (after mounting and chroot'ing over) ...
| Code: |
dev
`- mapper
|- crypt-home -> ../dm-7
|- crypt-opt -> ../dm-10
|- crypt-root -> ../dm-6
|- crypt-tmp -> ../dm-11
|- crypt-usr -> ../dm-8
|- crypt-var -> ../dm-9
|- vg1-home -> ../dm-1
|- vg1-opt -> ../dm-4
|- vg1-root -> ../dm-0
|- vg1-tmp -> ../dm-5
|- vg1-usr -> ../dm-2
`- vg1-var -> ../dm-3
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dir listing of /dev/vg1 also in livecd:
| Code: |
dev
`- mapper
|- vg1-home -> ../dm-1
|- vg1-opt -> ../dm-4
|- vg1-root -> ../dm-0
|- vg1-tmp -> ../dm-5
|- vg1-usr -> ../dm-2
`- vg1-var -> ../dm-3
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It would seem I'm missing the symbolic links in the /dev/mapper directory. And I'm wondering how those links ( --> ../dm-N) get created.
I do have the folling device files in /dev.
| Code: |
dev
|- dm0
|- dm1
|- dm2
|- dm3
|- dm4
|- dm5
|- dm6
|- ...
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Here's /etc/fstab
| Code: |
/dev/sda1 /boot ext2 noauto,noatime 1 2
/dev/sda2 none swap sw 0 0
/dev/mapper/crypt-root / ext2 noauto,noatime 1 2
/dev/mapper/crypt-home /home ext4 noatime 0 0
/dev/mapper/crypt-usr /usr ext4 noatime 0 1
/dev/mapper/crypt-var /var ext4 noatime 0 1
/dev/mapper/crypt-opt /opt ext4 noatime 0 1
/dev/mapper/crypt-tmp /tmp ext4 noatime 0 1
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And /etc/conf.d/dmcrypt
| Code: |
swap=swap
source='/dev/sda2'
target=crypt-home
source='/dev/mapper/crypt-home'
target=crypt-usr
source='/dev/mapper/crypt-usr'
target=crypt-var
source='/dev/mapper/crypt-var'
target=crypt-opt
source='/dev/mapper/crypt-opt'
target=crypt-tmp
source='/dev/mapper/crypt-tmp'
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Also, I'm using genkernels initramfs (3.8.13).
Any ideas much appreciated. |
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grey_dot
Tux's lil' helper
Joined: 15 Jul 2012
Posts: 142
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| Posted: Thu Aug 22, 2013 4:56 pm Post subject: |
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I've had a similiar problem, although my system mounts /usr after exiting initrd. If your system doesnt run systemd, which requires /usr premounted, you could remove usrmount from initrd and mount it with fstab. Also try adding lvm to boot runlevel, since udev sometimes doesnt create symlinks for lvm nodes.
p.s. why did you create a separate luks container for each lvm volume? It's usually done the other way around - a single luks container with lvm inside. Just interested. |
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LoTeK
Apprentice
Joined: 26 Jul 2012
Posts: 270
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| Posted: Thu Aug 22, 2013 5:21 pm Post subject: |
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Might be of little help, but why do you use genkernel?
I have a similar set up with a very simple initramfs and no problems:
| Code: | #!/bin/busybox sh
rescue_shell () {
echo "something went wrong... dropping you in a shell.."
busybox --install -s
exec /bin/sh
}
mount -t proc none /proc
mount -t sysfs none /sys
mount -t devtmpfs none /dev
# quiet kernel
echo 0 > /proc/sys/kernel/printk
# enter password
/sbin/cryptsetup -T 3 luksOpen /dev/sda1 cypher
# enable kernel messages
echo 1 > /proc/sys/kernel/printk
# activate lvm
/sbin/lvm.static vgscan --mknodes
/sbin/lvm.static vgchange -a y
mount -o ro /dev/mapper/vg-root /mnt/root || rescue_shell
# clean up
umount /proc
umount /sys
umount /dev
exec switch_root /mnt/root /sbin/init
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Wizumwalt
Guru
Joined: 20 Aug 2006
Posts: 547
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| Posted: Thu Aug 22, 2013 6:46 pm Post subject: |
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| grey_dot wrote: | I've had a similiar problem, although my system mounts /usr after exiting initrd. If your system doesnt run systemd, which requires /usr premounted, you could remove usrmount from initrd and mount it with fstab. Also try adding lvm to boot runlevel, since udev sometimes doesnt create symlinks for lvm nodes.
p.s. why did you create a separate luks container for each lvm volume? It's usually done the other way around - a single luks container with lvm inside. Just interested. |
I'm not running systemd.I do have /usr in fstab, though its obviously not working. And I do have LVM in the boot runlevel.
About the container, not sure. Mainly because I was following some tutorials and didn't quite understand it for myself. I'll look at it. |
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Wizumwalt
Guru
Joined: 20 Aug 2006
Posts: 547
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| Posted: Thu Aug 22, 2013 6:47 pm Post subject: |
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| LoTeK wrote: | Might be of little help, but why do you use genkernel?
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I use genkernel just to have an initramfs built for me. Guess I'll try rolling my own and use something similar to yours. |
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Wizumwalt
Guru
Joined: 20 Aug 2006
Posts: 547
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| Posted: Fri Aug 23, 2013 5:16 pm Post subject: |
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Still can't see what I'm doing wrong. What I did was create a small partition for boot, a separate partition for swap and another for the physical LVM. Then I encrypted the volumes. Then I opened the containers and formatted with a filesystem.
# fdisk -l /dev/sda
| Code: |
/dev/sda1 * 2048 133119 65536 83 Linux
/dev/sda2 133120 2181119 1024000 82 Linux swap / Solaris
/dev/sda3 2181120 156301487 77060184 8e Linux LVM
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# vgscan
| Code: |
VG #PV #LV #SN Attr VSize VFree
vg1 1 6 0 wz--n-- 73.49g 1.49g
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# lvscan
| Code: |
ACTIVE '/dev/vg1/root' [10.00 GiB] inherit
ACTIVE '/dev/vg1/home' [20.00 GiB] inherit
ACTIVE '/dev/vg1/usr' [20.00 GiB] inherit
ACTIVE '/dev/vg1/var' [10.00 GiB] inherit
ACTIVE '/dev/vg1/opt' [10.00 GiB] inherit
ACTIVE '/dev/vg1/tmp' [2.00 GiB] inherit
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And after mounting all this form a livecd and chroot'ing over, I ran genkernel to get an initramfs (vers 3.8.13-gentoo). I've compiled manually as well and used only the initramfs from genkernel as well. Either way, I hear this initramfs should work fine for this.
/boot/grub/grub.conf
| Code: |
title Gentoo Linux 3.8.13
root (hd0,0)
kernel /boot/kernel-genkernel-x86_64-3.8.13-gentoo root=/dev/ram0 crypt_root=/dev/vg1/root rootfstype=ext4 init=/linux dolvm
initrd /boot/initramfs-genkernel-x86_64-3.8.13-gentoo
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But I think I still have something wrong with either my fstab or dmcrypt.
/etc/fstab
| Code: |
/dev/sda1 /boot ext2 noauto,noatime 1 2
/dev/sda2 none swap sw 0 0
/dev/vg1/root / ext2 noauto,noatime 1 2
/dev/vg1/home /home ext4 noatime 0 0
/dev/vg1/usr /usr ext4 noatime 0 1
/dev/vg1/var /var ext4 noatime 0 1
/dev/vg1/opt /opt ext4 noatime 0 1
/dev/vg1/tmp /tmp ext4 noatime 0 1
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/etc/conf.d/dmcrypt
| Code: |
swap=swap
source='/dev/sda2'
target=home
source='/dev/mapper/vg1-home'
target=usr
source='/dev/mapper/vg1-usr'
target=var
source='/dev/mapper/vg1-var'
target=opt
source='/dev/mapper/vg1-opt'
target=tmp
source='/dev/mapper/vg1-tmp'
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And here is the boot error I keep getting.
| Code: |
>> Scanning for and activating Volume Groups
6 logical volume(s) in volume group "vg1" now active
Enter passphrase for /dev/vg1/root:
>> LUKS device /dev/vg1/root opened
>> Determining root device ...
>> Mounting /dev/mapper/root as root ...
>> Using mount -t ext4 -o ro
>> Mounting /dev/mapper/crypt-usr as /usr: mount -t ext4 -o noatime,ro /dev/mapper/crypt-usr /newroot/usr
mount: mounting /dev/mapper/crypt-user on /newroot/usr failed: No such file or directory
!! Unable to mount /dev/mapper/crypt-usr for /usr
>> Booting (initramfs)
INIT: version 2.88 booting
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piewie
Guru
Joined: 26 Sep 2002
Posts: 489
Location: old Europe
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| Posted: Fri Aug 23, 2013 8:50 pm Post subject: |
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you could try to use the UUID to prevent / exclude a /dev/mapper/vg1-usr or /dev/vg1/usr lvm naming problem
/etc/fstab:
UUID=xxxxxxxx-0000-aaa-yyyy-1111111111 /usr ext4 noatime,user_xattr,rw 0 1 |
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Wizumwalt
Guru
Joined: 20 Aug 2006
Posts: 547
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| Posted: Tue Aug 27, 2013 8:11 pm Post subject: |
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| Let me ask this. Should the initramfs generated by genkernel, is it setup to handle volume groups and whatnot the way I have configured? It certainly doesn't seem to mount my /usr, but should it? |
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piewie
Guru
Joined: 26 Sep 2002
Posts: 489
Location: old Europe
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| Posted: Wed Aug 28, 2013 10:01 pm Post subject: |
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Normally | Code: | | genkernel --lvm --oldconfig --luks --menuconfig all |
should do the job. But from what I have read around here, is that it is probably not that trivial with a separated /usr. Perhaps some additional binaries are necessary for initramfs.
| Quote: | >> Mounting /dev/mapper/crypt-usr as /usr: mount -t ext4 -o noatime,ro /dev/mapper/crypt-usr /newroot/usr
mount: mounting /dev/mapper/crypt-user on /newroot/usr failed: No such file or directory
!! Unable to mount /dev/mapper/crypt-usr for /usr |
looks not consistent to me, because of crypt-usr and crypt-user. |
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