[HOWTO] lvm2 for root, swap and software suspend2 (edit)

[Raffi]

Your fix should not cause any problems, they are supposed to be executable. Since I copy the files with cpio from your system, I can't see how those files did not get the correct permissions set unless your system has them wrong.

What file system are you running on /? What is the permissions on /bin/bb and /sbin/lvm?

[/root]

Wow. Really fast reply

Here are the requested Infos:

Filesystems:

[Raffi]

I'm using 2.6-r5 of cpio. I wonder if the syntax changed. What does your info page say that -L does?

[/root]

cpio options:

[Raffi]

That's what mine says.

Have you tried playing around with cpio? Does the following give an error?

[/root]

Nothing changed with different options of cpio.

The error I noticed in my previous post edit comes from "-l" instead of "-L"

Every file or directory created by

[Raffi]

That's very strange. It is acting like you are not copying into an ext2 file system.

Can you try to create a loopback ext2 filesytem by hand and see what happens when you copy to it using cpio? How are you looking at the files in the initrd that my script created?

[/root]

I've tried in different ways, even copying in the same ext3 filesystem gives the same results.

This way, I'm looking in the created initrd image:

[Raffi]

Sounds like either your kernel or your mkext2 command is doing something funny. What kernel version? What ext utils version.

[/root]

Current kernel version and e2fsprogs:

[Raffi]

I'm running sys-fs/e2fsprogs-1.39.


I'm also using a vanilla 2.6.19.2 on one machine and a suspend2 sources (not sure which version) on another. This is really strange, you do seem to have a permissions problem when you copy files. It also looks like you might be running an ~arch version of everything. If you have verified that creating a initrd ext2 loopback by and and maybe even trying it straight on a ramdisk /dev/ram0 gives you problems just copying files and trying to preserve permission, I would suggest starting a new thread on that.

[/root]

I've opened a thread in "Other things Gentoo" on the cpio problem in general.

[/root]

[Raffi]

I just noticed that my laptop stopped being able to hibernate. Turns out when I upgraded to the latest hibernate-scripts (1.94-r3) the sanity checking decided my system was not setup to hibernate. The new scripts don't detect this setup because we purposefully avoided all of the normal ways of telling the kernel about our resume device (since the kernel would not understand them until we finish setting things up)The fix is to add the line

[Raffi]

If you ever have the resume fail because it did not see your hibernated data in your swap partition (as opposed to seeing and rejecting it) you will want to be sure to invalidate the hibernated image before your next reboot. At least if you value your disks staying in an uncorrupted state.

If your image was not detected (as opposed to rejected) your swap will probably not activate since it will contain the hibernate image instead of a valid swap signature. In this case, a simple mkswap will take care of the problem and prevent what happened to me.

I was trying to bring my script up to date to deal with changes to the kernel and the hibernate scripts and when I thought I had it, I hibernated my laptop. The next reboot showed that I had not successfully dealt with the change from /proc to /sys in activating the resume. The machine booted up all the way ignoring my hibernate images and not activating my swap. I did not pay attention, fixed my script and rebooted with the intent of hibernating from a clean boot. I knew I was not going to be happy when instead of a clean boot, it resumed from the previous hibernate.

Fortunately, a reiserfsck --rebuild-tree from the lvm2 rescue on a couple of my logical volumes got me up far enough to be able to start the emerge -e world. It could have been worse.

Anyway, I updated my script and it should correctly deal with using /sys as well as /proc for resuming and it my earlier post about updating the .conf file for the hibernate script should deal with those changes as well.

[weedy]

with all these permission problems why not use rsync to copy the files?

[Raffi]

The only difference between cpio and rsync is on directories and this is only on the timestamp. I could have used rsync, but I'm an old unix guy from way back before such new fangled tools.

[Raffi]

Looks like the broken version of cpio has made it to portage stable. I have reported the bug. If it is not fixed soon, I will post a workaround.

[Raffi]

From bugzilla

fixed in 2.7-r2

https://bugs.gentoo.org/show_bug.cgi?id=174921

[lkraav]

hi raffi

thanks for the great script, i have converted regular setups into raid1+lvm2 setups running in no time.
my question is, do you know if adding LUKS support for mounting the root filesystem inside LVM2 volume suitable to be integrated in your script?

i am running the setup described here http://gentoo-wiki.com/SECURITY_System_Encryption_DM-Crypt_with_LUKS#Initramfs.27s_init on one machine,
it works well also. is it possible to bring these two scripts together?

[Raffi]

[lkraav]

thanks for your reply. the problem is, i would have to really start digging into both scripts without being the author. i think either of you guys could get the result in half or less time and effort. perhaps you have a virtual (vmware or other) machine you could experiment without tampering with your own system?

while encrypting the root filesystem usually isnt crucial anyway, i still think it would make for a coherent approach to designing a system, such as this:

raid1 -> lvm2 -> luks (swap, root, secure-data) -> ext/xfs/reiser...

i'll go ahead and start taking a look at both scripts to start.

[Raffi]

[dexxxter]

Hi!
I'm currently trying to make gentoo boot from root partition, located on LV over RAID mirror, but during boot i get following message:

initrd: Mounting /proc
initrd: Remounting / read/write
Starting RAID device /dev/md6
/sbin/init: /sbin/init: 78: /sbin/mdadm: Permission denied

...later...

*** Entering LVM2 rescue shell. Exit shell to continue booting. ***

/ $ mdadm
/bin/ash: mdadm: Permission denied
/ $ ls -la /sbin
drwxr-xr-x 2 0 0 1024 Jul 22 07:22 .
drwxr-xr-x 10 0 0 1024 Jul 22 07:22 ..
-r-xr-xr-x 1 0 0 3811 Jul 22 07:22 init
-rwxr-xr-x 1 0 0 1362680 Jul 22 07:22 lvm
-rwsr-xr-x 1 0 0 177352 Jul 22 07:22 mdadm

Chmoding mdadm to 0777, 0755, 4755 (as above) with no result.

Any Ideas why it doesn't start md-devices?

initrd was created with:
lvm2create_initrd.sh -M gentoo -c /etc/lvm/lvm.conf -r /dev/md6 -R /etc/mdadm.conf 2.6.20-gentoo-r7

kernel compiled with
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=y
CONFIG_MD_RAID0=y
CONFIG_MD_RAID1=y
CONFIG_MD_RAID10=y
CONFIG_MD_RAID456=y
CONFIG_MD_RAID5_RESHAPE=y
# CONFIG_MD_MULTIPATH is not set
# CONFIG_MD_FAULTY is not set
CONFIG_BLK_DEV_DM=y
# CONFIG_DM_DEBUG is not set
CONFIG_DM_CRYPT=y
CONFIG_DM_SNAPSHOT=y
CONFIG_DM_MIRROR=y
# CONFIG_DM_ZERO is not set
# CONFIG_DM_MULTIPATH is not set
CONFIG_BLK_DEV_DM_BBR=m

Disk layout:
/dev/sda(b)1 -> /dev/md0 (raid1) -> /boot
/dev/sda(b)2 -> extended
/dev/sda3 -> current '/'
/dev/sda(b)4 -> /dev/md4 (raid0) -> swap
/dev/sda(b)5 -> /dev/md5 (raid0) -> LVM VG stripe
/dev/sda(b)6 -> /dev/md6 (raid1) -> LVM VG mirror

grub.conf:
title=GeNtOoOoOo LVM (2.6.20-7)
root (hd0,0)
kernel /kernel-genkernel-x86_64-2.6.20-gentoo-r7 root=/dev/ram0 lvm2root=/dev/mirror/root ramdisk_size=5456
initrd /initrd-lvm2-2.6.20-gentoo-r7.gz

also tried to add dodmraid dolvm2 to kernel options.

[Raffi]