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#!/bin/bash

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### Parameters

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## Options

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_MOCK=${_MOCK:0}

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## Guest info

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GUEST_NAME=$1

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# Basic params

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GUEST_RAM=1G

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GUEST_VCPUS=2

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# OS variant (for virt-install)

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GUEST_OS_VARIANT=debiansqueeze

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## Disk

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# Size of LV to create

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DISK_SIZE=10G

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# LVM vg to use

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DISK_VG=pvl

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# LVM lv to use

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DISK_NAME=${GUEST_NAME}

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# Path to disk block device

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DISK_PATH=/dev/mapper/${DISK_VG}-${DISK_NAME}

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DISK_BUS=virtio

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GUEST_DISK=/dev/vda

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## Network

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NET_HOSTNAME=${GUEST_NAME}

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NET_BRIDGE=br-lan

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NET_IPADDR=194.197.235.36

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## Installation image

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# Original Debian Installer image (iso)

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INSTALLER_NAME="debian-6.0.3-amd64"

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INSTALLER_ISO="iso-in/${INSTALLER_NAME}-netinst.iso"

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INSTALLER_TREE="iso-in/$INSTALLER_NAME"

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INSTALLER_FLAG="${INSTALLER_TREE}.unpacked"

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# Customized preseed image name

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INSTALL_NAME="debian-6.0.3-amd64_${GUEST_NAME}"

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# Customized image content

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INSTALL_TREE="images/${INSTALL_NAME}"

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INSTALL_ISO="iso-out/${INSTALL_NAME}.iso"

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# Preseed output file in install tree

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INSTALL_PRESEED_NAME="preseed.cfg"

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INSTALL_PRESEED_FILE="${INSTALL_TREE}/${INSTALL_PRESEED_NAME}"

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INSTALL_PRESEED_CHECKSUM= # set later

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# Preseed source template

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PRESEED_TEMPLATE="preseed/preseed.cfg"

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PRESEED_ISOLINUX="preseed/isolinux.cfg"

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PRESEED_REST="preseed/passwords.cfg"

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## External progs

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# Bootable .iso for Debian isolinux-based installer CDs

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GENISOIMAGE=/usr/bin/genisoimage

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GENISOIMAGE_OPTS="-r -J -no-emul-boot -boot-load-size 4 -boot-info-table -b isolinux/isolinux.bin -c isolinux/boot.cat"

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# LVM

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LVM=/sbin/lvm

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# Libvirt --connect URL

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LIBVIRT=qemu:///system

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VIRSH=/usr/bin/virsh

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function virsh () {

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    $VIRSH --connect $LIBVIRT "$@"

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}

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# type of guest to create

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LIBVIRT_TYPE=kvm

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# virt-install

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VIRT_INSTALL="/usr/bin/virt-install"

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## SELinux?

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#SEMANAGE=/usr/sbin/semanage

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#RESTORECON=/sbin/restorecon

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### Functions

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set -u

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set -e

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scripts=$(dirname $0)/scripts

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. $scripts/lib.sh

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### Check

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# VM exists?

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if cmd virsh domid ${GUEST_NAME} 2> /dev/null; then

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    die "Virtual machine already exists: ${GUEST_NAME}"

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fi

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# Installer exists?

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if cmd test ! -f ${INSTALLER_ISO}; then

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    die "Installer not found: ${INSTALLER_ISO}"

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fi

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### Go!

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# Extract .iso

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if [ -f ${INSTALLER_FLAG} ]; then

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    echo "Installer already unpacked: ${INSTALLER_TREE}"

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else

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    echo "Unpacking installer: ${INSTALLER_ISO}"

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    cmd extract_iso ${INSTALLER_ISO} ${INSTALLER_TREE}

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    cmd touch ${INSTALLER_FLAG}

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fi

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# Copy to customized tree

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cmd cp -r ${INSTALLER_TREE} ${INSTALL_TREE}

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cmd chmod -R u=rwX,og=rX ${INSTALL_TREE}

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# XXX: Customize preseed

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cmd expand_template ${PRESEED_TEMPLATE} ${INSTALL_PRESEED_FILE}

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# md5sum

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INSTALL_PRESEED_CHECKSUM=$(my_md5sum $INSTALL_PRESEED_FILE)

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# Isolinux .cfg

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cmd expand_template ${PRESEED_ISOLINUX} ${INSTALL_TREE}/isolinux/isolinux.cfg

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# Others

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for file in ${PRESEED_REST}; do

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    name=$(basename $file)

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    cmd expand_template $file ${INSTALL_TREE}/${name}

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done

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# Create .iso

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[ -f ${INSTALL_ISO} ] && cmd rm -f ${INSTALL_ISO}

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cmd ${GENISOIMAGE} -o ${INSTALL_ISO} ${GENISOIMAGE_OPTS} ${INSTALL_TREE}

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## LVM

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# Create LV (unless it already exists)

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[ -e $DISK_PATH ] || cmd sudo $LVM lvcreate -L $DISK_SIZE -n $DISK_NAME $DISK_VG

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## SELinux?

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#$SEMANAGE fcontext -a -t virt_image_t $DISK

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#$RESTORECON -v $DISK

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## virt-install

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cmd $VIRT_INSTALL \

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        --connect $LIBVIRT \

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        --name $GUEST_NAME \

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        --ram $(expand_MB $GUEST_RAM) --vcpus $GUEST_VCPUS \

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        --cdrom "$INSTALL_ISO" \

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        --os-variant $GUEST_OS_VARIANT \

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        --disk path=$DISK_PATH,bus=$DISK_BUS \

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        --network bridge:$NET_BRIDGE \

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        --vnc \

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        --virt-type $LIBVIRT_TYPE \

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        --accelerate --hvm \

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        --serial pty

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