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epretorious
Apprentice
Joined: 04 Jul 2003
Posts: 191
Location: Truckee, CA
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 Posted: Thu Dec 15, 2005 10:37 pm Post subject: Preventing the dreaded udev problem: Unable to open an in... |
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I've been working on creating a "snapshot" of a fully-hardened Gentoo installation (i.e., /usr/portage/profiles/x86/hardened/2005.1) for...
- installing across multiple systems, and/or
- restoring the system to a base
...without having to recompile each time - a 12 hour task on the six 900MHz Celeron systems that we're using in our lab - but I've been having problems preventing the dreaded udev problem (i.e., "Warning: unable to open an initial console") before finalizing the snapshot.
I've read...- bugreport #40987 (i.e., the main udev bugreport - the one that's mentioned in the /etc/issue warning)...
| Code: | -----------------------------------------------------
Your system seems to be missing critical device files
in /dev ! Although you may be running udev or devfs,
the root partition is missing these required files !
To rectify this situation, please do the following:
mkdir /mnt/fixit
mount --bind / /mnt/fixit
cp -a /dev/* /mnt/fixit/dev/
umount /mnt/fixit
rmdir /mnt/fixit
You may refer to these instructions at /etc/issue.
If you previously had an issue file, it has been
backed up at /etc/issue.devfix. Once you've fixed
your system, you will have to restore your old issue
file in order to get rid of this warning.
Thanks for using Gentoo ! :)
http://bugs.gentoo.org/show_bug.cgi?id=40987
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The Gentoo udev Guide, and
a few very enlightening posts about udev failures on start-up (e.g., Just search the forums for the phrase "Warning: unable to open an initial console")....but I'm not able to find any direction for actually preventing this error from occuring on the initial boot. (The fix described in The Gentoo udev Guide works just fine but my objective is to create a snapshot that doesn't need to be "fixed" after installing the snapshot onto the system.)
What can I do (before taking the final snapshot) to insure that I don't have to fix the snapshot each time I install it onto a system?
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Eric P.
Sunnyvale, CA |
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epretorious
Apprentice
Joined: 04 Jul 2003
Posts: 191
Location: Truckee, CA
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| Posted: Fri Dec 16, 2005 12:33 am Post subject: |
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FWIW: I'm creating the snapshot by using this very simple script to create an archive of the chroot'ed environment during installation: | Code: | #!/bin/bash
# Execute this script from /mnt/gentoo after...
# merging the base system (i.e., Stage 2)
# merging all of additional ebuilds that constitute a complete system (i.e., Stage 3)
DATE=`date +%Y%m%d`
STAGE=$1
if [ "$STAGE" != '2' ] && [ "$STAGE" != '3' ]
then
echo 'This script requires one argument - the number 2 or the number 3 - to indicate the level of completeness.'
exit
fi
echo "Creating /mnt/nfs/snapshot.$DATE-$STAGE.tgz"
tar -czf /mnt/nfs/snapshot.$DATE-$STAGE.tgz --directory=/mnt/gentoo \
--exclude='dev/*' \
--exclude='proc/*' \
--exclude='sys/*' \
--exclude='usr/portage/*' \
--exclude='usr/src/linux*' . |
Later, I can retrieve the .tgz file and expand it in the /mnt/gentoo filesystem to import a completed system (i.e., a system with a fully-hardened 'system' and/or 'world').
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Eric P.
Sunnyvale, CA |
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epretorious
Apprentice
Joined: 04 Jul 2003
Posts: 191
Location: Truckee, CA
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| Posted: Sun Jan 29, 2006 3:42 am Post subject: Re: Preventing the dreaded udev problem: Unable to open an i |
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| epretorious wrote: | | What can I do (before taking the final snapshot) to insure that I don't have to fix the snapshot each time I install it onto a system? |
The simplest solutions are always the best: After successfully building the system, empty out the contents of the /dev mount point as I'm exiting the chroot'd environment and unmount'ing the partitions. i.e.,
| Code: | %> exit
# unmount /mnt/gentoo/proc
# unmount /mnt/gentoo/dev
# rm /mnt/gentoo/dev/*
# mknod -m 660 /mnt/gentoo/dev/console c 5 1
# mknod -m 660 /mnt/gentoo/dev/null c 1 3
# tar -czf /mnt/nfs/snapshot.tgz --directory=/mnt/gentoo \
--exclude='sys/*' \
--exclude='usr/portage/*' \
--exclude='usr/src/linux*' . |
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Eric P.
Sunnyvale, CA |
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Installing Gentoo
