create-sl63-image.sh

#!/bin/sh

set -e

image=/tmp/sl63.img

root_dir=/tmp/root

truncate -s 5368709120 $image

parted --script -- $image "mklabel msdos"
parted --script -- $image "mkpart primary ext2 63s 4095"
parted --script -- $image "mkpart primary linux-swap(v1) 4096 5119"

kpartx -va $image

mkfs.ext4 -F -E lazy_itable_init=1 -L root /dev/mapper/loop0p1
mkswap -L swap -f /dev/mapper/loop0p2

mount /dev/mapper/loop0p1 $root_dir

cat <<EOF > /tmp/sl.repo
[sl]
name=Scientific Linux 6 - x86_64
baseurl=http://ftp.scientificlinux.org/linux/scientific/6/x86_64/os/
		http://ftp1.scientificlinux.org/linux/scientific/6/x86_64/os/
		http://ftp2.scientificlinux.org/linux/scientific/6/x86_64/os/
		ftp://ftp.scientificlinux.org/linux/scientific/6/x86_64/os/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-sl file:///etc/pki/rpm-gpg/RPM-GPG-KEY-dawson
EOF

yum -c /tmp/sl.repo --disablerepo='*' --enablerepo='sl' --installroot=$root_dir \
 -y groupinstall core

mkdir -m 0755 $root_dir/dev/pts
mkdir -m 1777 $root_dir/dev/shm

rm $root_dir/dev/null
mknod -m 666 $root_dir/dev/null    c 1 3
mknod -m 666 $root_dir/dev/zero    c 1 5
mknod -m 620 $root_dir/dev/tty1    c 4 1
mknod -m 620 $root_dir/dev/tty2    c 4 2
mknod -m 620 $root_dir/dev/tty3    c 4 3
mknod -m 620 $root_dir/dev/tty4    c 4 4
mknod -m 600 $root_dir/dev/console c 5 1
mknod -m 666 $root_dir/dev/full    c 1 7
mknod -m 666 $root_dir/dev/randam  c 1 8
mknod -m 666 $root_dir/dev/urandam c 1 9
mknod -m 666 $root_dir/dev/ptmx    c 5 2

chroot $root_dir bash -e -c "echo root:root | chpasswd"

cat <<EOF > $root_dir/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=drpepper.mizzy.org
EOF

cat <<EOF > $root_dir/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
BOOTPROTO=dhcp
ONBOOT=yes
EOF

root_uuid=`blkid -sUUID -ovalue /dev/mapper/loop0p1`
swap_uuid=`blkid -sUUID -ovalue /dev/mapper/loop0p2`

cat <<EOF > $root_dir/etc/fstab
UUID=${root_uuid} /        ext4   defaults       1 1
UUID=${swap_uuid} swap     swap   defaults       0 0
tmpfs             /dev/shm tmpfs  defaults       0 0
devpts            /dev/pts devpts gid=5,mode=620 0 0
sysfs             /sys     sysfs  defaults       0 0
proc              /proc     proc  defaults       0 0
EOF

sed -i "s/^\(SELINUX=\).*/\1disabled/" $root_dir/etc/sysconfig/selinux

yum -c /tmp/sl.repo --disablerepo='*' --enablerepo='sl' --installroot=$root_dir \
 -y install kernel

yum -c /tmp/sl.repo --disablerepo='*' --enablerepo='sl' --installroot=$root_dir \
 -y install grub

cat <<EOF > /tmp/device.map
(hd0) $image
EOF

cp $root_dir/usr/share/grub/x86_64-redhat/stage1 $root_dir/boot/grub
cp $root_dir/usr/share/grub/x86_64-redhat/stage2 $root_dir/boot/grub

cat <<EOF | grub --batch --device-map=/tmp/device.map
root (hd0,0)
setup (hd0)
quit
EOF

cat <<EOF > $root_dir/boot/grub/grub.conf
default=0
timeout=5
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
hiddenmenu
title sl-6.3_x86_64 (2.6.32-279.el6.x86_64)
    root (hd0,0)
    kernel /boot/vmlinuz-2.6.32-279.el6.x86_64 ro root=UUID=${root_uuid} rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM selinux=0
    initrd /boot/initramfs-2.6.32-279.el6.x86_64.img
EOF

cd $root_dir/boot/grub
ln -fs grub.conf menu.lst
cd - >/dev/null

chroot $root_dir bash -e -c "ln -fs /boot/grub/grub.conf /etc/grub.conf"

umount $root_dir
kpartx -dv $image