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| Installing & Upgrading Installing and upgrading FreeBSD. |
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#1
January 28th, 2012, 23:10
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PXE TFTP network installations
Did anyone succeed in performing a FreeBSD 9 network installation using PXE+TFTP (not NFS)? With previous versions of FreeBSD the installation CD contained a mfsroot ramdisk image, which could easily be modified for use in TFTP network installations. However I'm not sure how to transform the new FreeBSD 9 live cd format to a mfsroot image.
What I tried is simply creating a blank 200 mb mfsroot file with mdconfig, format it with newfs, mount it, and copy the contents of the CD with rsync. However FreeBSD doesn't seem to like the resulting image. The pxeboot stage goes fine, in the sense that it downloads the kernel files and the mfsroot:  But once it tries to boot I get a screen full of "page fault while in kernel mode" errors that are printed so fast they are hardly readable:  Also I'm not sure if my loader.rc is correct. I'm using this 5-line one which works fine with FreeBSD 8: Code:
echo Loading Kernel... load /boot/kernel/kernel echo Loading MFS root... load -t mfs_root /mfsroot set autoboot_delay=0 Last edited by DutchDaemon; January 28th, 2012 at 23:26. Reason: Proper formatting: http://forums.freebsd.org/showthread.php?t=8816 
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#2
January 29th, 2012, 16:18
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Turns out the kernel does not support large ramdisks by default.
Managed to solve the problem by increasing NPKT in /usr/src/sys/amd64/include/pmap.h
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| The Following 2 Users Say Thank You to Max_nl For This Useful Post: | ||
bunnylover (February 10th, 2012), wblock@ (January 29th, 2012) | ||
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#6
February 8th, 2012, 18:50
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I would guess it's not PXE specifically, but that a kernel image or memory allocation is larger than the default is built to allow. Best to ask on one of the mailing lists, like freebsd-hackers.
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#7
February 10th, 2012, 18:28
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As a sidenote to the original post, I'd like to mention that I had success in using mfsBSD from 9.0-RELEASE to create a 28 MB FreeBSD installer that can be sent using PXE+TFTP (without NFS). The CD appears to simply use /etc/rc.local to start the installer and this seems to work well if one puts in a little time to build a few shell scripts and create new bsdinstall targets.
Last edited by DutchDaemon; February 11th, 2012 at 06:01.
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| The Following User Says Thank You to bunnylover For This Useful Post: | ||
wblock@ (February 10th, 2012) | ||
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#8
February 27th, 2012, 03:24
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Anyone figure out how to use bootonly ISO as source for memdisk image? Trying to create a variant of FreeBSD that uses our existing Linux based SysLinux/PxeLinux based DHCP/TFTP environment for PXE. Unfortunately, we can't dedicated server for FreeBSD based PXE/TFTP/DHCP resources.
I created an img file that PXELinux can load, but after I got the boot loader successfully, and I added a referece to /dev/md0 in the loader.conf file, I get a failure. Code:
mountroot: waiting for device /dev/md0, Mounting from ufs:/dev/md0 failed with error 19 Code:
Download the FreeBSD boot only image to the virtual instance.
# cd /tmp
# wget ftp://ftp.freebsd.org/pub/FreeBSD/ISO-IMAGES-<architecture>/9.0/FreeBSD-9.0-RELEASE-<architecture>-bootonly.iso
Where <architecture> is i386 or x86_64.
# ls -al | grep Free
-rw-r--r-- 1 root wheel 134739968 Feb 25 08:25 FreeBSD-9.0-RELEASE-<architecture>-bootonly.iso
Establish memory disk for boot only disc, then mount boot only disc file to memory disk…
# mdconfig -a -t vnode -f FreeBSD-9.0-RELEASE-<architecture>-bootonly.iso -u1
# mkdir /tmp/iso
# mount -t cd9660 /dev/md1 /tmp/iso
Establish memory disk file for boot only image, be sure to size the file to allow for file system overhead…
# dd if=/dev/zero of=./bootonly.img bs=1m count=200
# ls -al | grep bootonly
-rw-r--r-- 1 root wheel 134739968 Feb 25 08:25 FreeBSD-9.0-RELEASE-i386-bootonly.iso
-rw-r--r-- 1 root wheel 209715200 Feb 26 16:10 bootonly.img
Initialize, label, and format memory disk for boot only image…
# mdconfig -a -t vnode -f bootonly.img -u0
# bsdlabel -w -B md0 auto
# bsdlabel -A md0
# /dev/md0:
type: unknown
disk: amnesiac
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 406
sectors/unit: 409600
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
8 partitions:
# size offset fstype [fsize bsize bps/cpg]
a: 409584 16 unused 0 0
c: 409600 0 unused 0 0 # "raw" part, don't edit
Set file system for memory disk boot only image, and then mount memory disk boot only image…
# newfs -b 8192 -f 1024 /dev/md0a
/dev/md0a: 200.0MB (409584 sectors) block size 8192, fragment size 1024
using 5 cylinder groups of 45.16MB, 5781 blks, 11584 inodes.
super-block backups (for fsck -b #) at:
144, 92640, 185136, 277632, 370128
# mkdir /tmp/img
# mount /dev/md0a /tmp/img
Replicate boot specific files, from mounted boot only disc image to mounted boot only image…
# cp -vR /tmp/iso/* /tmp/img
Customize boot configuration…
# echo 'vfs.root.mountfrom="ufs:/dev/md0"' >> /tmp/img/boot/loader.conf
Release mounts and memory disk references…
# umount /tmp/iso
# umount /tmp/img
# mconfig –l
md1 md0
# mdconfig -d -u1
# mdconfig -d -u0
# mconfig –l
# rm -rf /tmp/iso
# rm -rf /tmp/img
Compress boot only memory disk image…
# gzip -c bootonly.img > bootonly.img.gz
# ls -al | grep bootonly
-rw-r--r-- 1 root wheel 134739968 Feb 25 08:25 FreeBSD-9.0-RELEASE-i386-bootonly.iso
-rw-r--r-- 1 root wheel 209715200 Feb 26 17:33 bootonly.img
-rw-r--r-- 1 root wheel 60502254 Feb 26 17:36 bootonly.img.gz
# rm –rf bootonly.img
# mv bootonly.img.gz bootonly.img
Stage compressed boot only image on TFTP boot server, and then within the PXELinux environment…
# scp bootonly.img.gz 192.168.1.36:/var/lib/tftpboot/images/FreeBSD/9.0/<architecture>/ bootonly.img.gz
Where <architecture> is i386 or x86_64.
# vi /var/lib/tftpboot/pxelinux.cfg/default
LABEL FreeBSD-9.0-i386-Installer
MENU LABEL i386 Installer
MENU INDENT 6
KERNEL memdisk
APPEND initrd=/images/FreeBSD/9.0/i386/initrd.img.gz raw
Last edited by DutchDaemon; February 27th, 2012 at 04:29. Reason: Proper formatting: http://forums.freebsd.org/showthread.php?t=8816
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