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#!/bin/sh
# Bootstrap VM
#
# -- bencoh, 2010/07/11
# -- asmadeus, 2010/07
### Configuration
BOOTSTRAP_REPOSITORY="http://ftp.fr.debian.org/debian/"
BOOTSTRAP_FLAVOR="lenny"
BOOTSTRAP_LINUX_IMAGE="linux-image-2.6-686"
BOOTSTRAP_EXTRA_PKGSS="vim-nox,htop,screen,less,bzip2,bash-completion,locate,acpid,$BOOTSTRAP_LINUX_IMAGE"
BOOTSTRAP_PARTITION_TYPE="msdos" #this or anything else ?
BOOTSTRAP_CONF_DIR="$BOOTSTRAP_DIR/$BOOTSTRAP_DISTRIB/conf"
###
cleanup()
{
if [ ${#CLEANUP[*]} -gt 0 ]; then
LAST_ELEMENT=$((${#CLEANUP[*]}-1))
for i in `seq $LAST_ELEMENT -1 0`; do
${CLEANUP[$i]}
done
fi
}
CLEANUP=( )
trap cleanup EXIT
function map_disk()
{
local DISKDEV=$1
kpartx -a -p- $DISKDEV > /dev/null
echo /dev/mapper/`kpartx -l -p- $DISKDEV | grep -m 1 -- "-1.*$DISKDEV" | awk '{print $1}'`
}
function unmap_disk()
{
local DISKDEV=$1
kpartx -d -p- $DISKDEV
}
function bs_copy_from_host()
{
local FILE="$1"
cp -rf "$FILE" "$MNTDIR/$FILE"
}
function bs_copy_conf_dir()
{
cp -rf "$BOOTSTRAP_CONF_DIR/*" "$MNTDIR"
}
function bootstrap_fs()
{
MNTDIR="`mktemp -d`"
local DISKDEV=$1
local PARTDEV=$1
if [[ BOOTSTRAP_PARTITION_TYPE -eq "msdos" ]]; then
sfdisk -H 255 -S 63 -uS --quiet --Linux "$DISKDEV" <<EOF
63,,L,*
EOF
PARTDEV=`map_disk $DISKDEV`
CLEANUP+=("unmap_disk $DISKDEV")
fi
mkfs.ext3 "$PARTDEV"
#mkdir "$MNTDIR"
mount "$PARTDEV" "$MNTDIR"
# Now debootstrap, first stage (do not configure)
debootstrap --foreign --include="$BOOTSTRAP_EXTRA_PKGSS" "$BOOTSTRAP_FLAVOR" "$MNTDIR" "$BOOTSTRAP_REPOSITORY"
# init script to be run on first VM boot
local BS_FILE="$MNTDIR/bootstrap-init.sh"
cat > "$BS_FILE" << EOF
#!/bin/sh
mount -no remount,rw /
cat /proc/mounts
/debootstrap/debootstrap --second-stage
mount -nt proc proc /proc
dpkg -i /var/cache/apt/archives/linux-image-2.6*
echo "Bootstrap ended, halting"
exec /sbin/init 0
EOF
chmod +x "$BS_FILE"
sed -ie "s/linux-image-[^ ]\+//g" "$MNTDIR/debootstrap/base"
# umount
sync
umount "$MNTDIR"
# Start VM to debootstrap, second stage
desc_update_setting "KVM_NETWORK_MODEL" "virtio"
desc_update_setting "KVM_KERNEL" "/home/bencoh/kvm-hdd/boot/vmlinuz-2.6.26-2-686"
desc_update_setting "KVM_INITRD" "/home/bencoh/kvm-hdd/boot/initrd.img-2.6.26-2-686"
desc_update_setting "KVM_APPEND" "root=/dev/hda ro init=/bootstrap-init.sh"
kvm_start_vm "$VM_NAME"
mount "$PARTDEV" "$MNTDIR"
CLEANUP+=("umount $MNTDIR; rmdir $MNTDIR")
# Copy some files/configuration from host
bs_copy_from_host /etc/hosts
bs_copy_from_host /etc/resolv.conf
bs_copy_conf_dir
# bs_copy_from_host /etc/bash.bashrc
# bs_copy_from_host /etc/profile
# bs_copy_from_host /root/.bashrc
# bs_copy_from_host /etc/vim/vimrc
# bs_copy_from_host /etc/screenrc
# bs_copy_from_host /etc/apt/sources.list
echo "$VM_NAME" > "$MNTDIR/etc/hostname"
# fstab
LOCAL rootdev="/dev/hda"
if [[ BOOTSTRAP_PARTITION_TYPE -eq "msdos" ]]; then
rootdev="/dev/hda1"
fi
cat > "$MNTDIR/etc/fstab" << EOF
$rootdev / ext3 errors=remount-ro 0 1
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
EOF
# interfaces
local IF_FILE="$MNTDIR/etc/network/interfaces"
cat > "$IF_FILE" << EOF
auto lo
iface lo inet loopback
auto eth0
EOF
if [[ -n "$BOOTSTRAP_NET_ADDR" ]]; then
cat >> "$IF_FILE" << EOF
iface eth0 inet static
address $BOOTSRAP_NET_ADDR
netmask $BOOTSTRAP_NET_MASK
network $BOOTSTRAP_NET_NW
gateway $BOOTSTRAP_NET_GW
EOF
else
cat >> "$IF_FILE" << EOF
iface eth0 inet dhcp
EOF
fi
sync
cleanup
trap - EXIT
desc_update_setting "KVM_APPEND" "root=/dev/hda ro"
}
|
