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#!/bin/bash

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### Initialize 

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set -u

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set -e

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TESTING=

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DO_SHOWSPEC=y

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DO_VIRTINSTALL=

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scripts=$(dirname $0)/scripts

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. $scripts/lib.sh

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### Command-line input

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## Command-line options

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function _help () {

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    cat <<END

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Usage: $1 [options] <name> [param=value [...]]

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Options:

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    -h      Show this help text

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    -D      Debug

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    -v      Verbose

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    -q      Quiet

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    -N      Mock command execution

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    -P      Skip command prompts

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    -I      Do a virt-install

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    -T      Just testing..

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Parameters are given as:

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    name=value-{FOO}

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END

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}

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while getopts "hDvqNPTI" opt; do

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    case "$opt" in

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        h)

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            _help $0

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            exit 0

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            ;;

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        D)

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            LOG_DEBUG=y

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            LOG_CMD=y

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            ;;

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        v)

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            LOG_CMD=y

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            log_debug "log: Commands"

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            ;;

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        q)

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            LOG_CMD=

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            LOG_INFO=

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            DO_SHOWSPEC=

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            log_debug "log: Quiet"

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            ;;

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        N)

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            log_info "Mock-executing commands (this will break functionality..)"

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            CMD_MOCK=y

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            ;;

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        P)

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            log_info "Skipping command confirmations"

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            CMD_PROMPT=

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            ;;

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        T)

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            log_info "Just testing.."

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            TESTING=y

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            ;;

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        I)

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            log_info "Do virt-install"

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            DO_VIRTINSTALL=y

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            ;;

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        ?)

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            _help $0

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            exit 1

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            ;;

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    esac

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done

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# forget them

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[ $OPTIND -gt 1 ] && shift $(( $OPTIND - 1 ))

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## Command-line arguments

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# Name

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[ -z $1 ] && die "Machine name must be given as first argument"

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opt_name="$1"; shift

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# Defaults

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function define_opt () {

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    local name=$1

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    local value=${2:-}

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    log_debugf "%-20s = %s" $name "$value"

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    eval "opt_${name}=${value}"

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}

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function resolve_name () {

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    local name=$1

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    local out=$(dig +short $name)

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    [ -z "$out" ] && die "Hostname lookup failed: $name"

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    echo $out

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}

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define_opt  ram         1G

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define_opt  cpus        2

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define_opt  os          debiansqueeze

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define_opt  disk_size   10G

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define_opt  disk_vg     pvl

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define_opt  disk_lv     $opt_name

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define_opt  disk_bus    virtio

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define_opt  guest_disk  /dev/vda

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define_opt  hostname    $opt_name

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define_opt  bridge      br-lan

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define_opt  domain      paivola.fi

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define_opt  ip          

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define_opt  puppet      

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define_opt  puppet_master   puppet

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define_opt  serial_console

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log_info "Processing ${#@} parameters:"

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for param in "$@"; do

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    name=${param%=*}

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    value=${param##*=}

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    # evaluate

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    value=$(expand_line "$value")

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    define_opt ${name} "${value}"

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done

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# resolve defaults

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if [ -z $opt_ip ]; then

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    define_opt  ip          $(resolve_name ${opt_name}.${opt_domain})

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fi

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### Virtual machine config

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## General

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NAME=$opt_name

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DOMAIN=$opt_domain

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FQDN=${NAME}.${DOMAIN}

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## libvirt guest info

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# Name

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GUEST_NAME=$NAME

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# Basic params

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GUEST_RAM=$opt_ram

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GUEST_VCPUS=$opt_cpus

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# OS variant (for virt-install)

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GUEST_OS_VARIANT=$opt_os

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## Disk

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# Size of LV to create

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DISK_SIZE=$opt_disk_size

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# LVM vg to use

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DISK_VG=$opt_disk_vg

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# LVM lv to use

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DISK_NAME=$opt_disk_lv

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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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GUEST_DISK_BUS=$opt_disk_bus

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## Serial

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# Serial console?

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# XXX: hardcoded as ttyS0

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case x"$opt_serial_console" in

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#    xtty*)  SERIAL_CONSOLE="$opt_serial_console" ;;

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    x)       SERIAL_CONSOLE=     ;;

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    x*)     SERIAL_CONSOLE="ttyS0" ;;

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esac

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### Preseed content

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GUEST_DISK=$opt_guest_disk

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## Network

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# Network configuration, for /etc/network/interfaces

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NET_DOMAIN=${DOMAIN}

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NET_HOSTNAME=${NAME}

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NET_BRIDGE=$opt_bridge

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NET_IPADDR=$opt_ip

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NET_NETMASK=255.255.255.0

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NET_GATEWAY=194.197.235.1

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NET_NAMESERVERS=( 194.197.235.210 194.197.235.252 )

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## Clock/time

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TIME_ZONE='Europe/Helsinki'

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# only used during install, not stored in target

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TIME_NTP_SERVER=ntp.paivola.fi                      # XXX: harcoded

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## User account

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function getent_user_attr () {

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    local user=$1

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    local db=$2

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    local attr=$3

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    line=$(getent $db $user) || die "Unable to read $db database for $user"

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    echo "$line" | cut -d ':' -f $attr

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}

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function user_fullname () {

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    local user=$1

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    getent_user_attr $user passwd 5

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}

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function user_shadow () {

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    local user=$1

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    if [ $UID -eq 0 ]; then

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        log_debug "Get user password from shadow: $user"

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        getent_user_attr $user shadow 2

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    else

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        echo -n "Install target login ($USER_NAME) " >&2

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        mkpasswd -m sha-512

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    fi

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}

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# XXX: hardcoded

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USER_CREATE='true'

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USER_NAME=$USER

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USER_FULLNAME=$(user_fullname $USER)

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USER_SHADOW=$(user_shadow $USER)

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USER_GROUPS=( cdrom sudo adm )

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### Installer setup

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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 setup

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## preseed.cfg templating

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# Preseed output file in install tree

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PRESEED_NAME="preseed.cfg"

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# Mount path of preseed target in installer

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PRESEED_MOUNT="/cdrom"

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# Prefix for target files in install tree

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# XXX: not implemented

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#PRESEED_TARGET_PREFIX=""

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# Main preseed source template

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# Target path for preseed in install tree

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PRESEED_FILE="${INSTALL_TREE}/${PRESEED_NAME}"

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# Checksum of target preseed.cfg

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PRESEED_CHECKSUM= # set later

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## preseed.cfg contents

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# List of additional packages to install

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PRESEED_PACKAGES=( sudo screen vim )

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# Script commands to execute

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PRESEED_LATE_COMMANDS=( )

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PRESEED_LATE_COMMANDS_END=( )

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# Chainload preseed files

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PRESEED_INCLUDES=( 'passwords.cfg' 'host.cfg' )

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# Add packages to preseed install

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function preseed_packages () {

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    PRESEED_PACKAGES=( ${PRESEED_PACKAGES[@]} "$@" )

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}

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# Add command to execute

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function preseed_late_commands () {

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    PRESEED_LATE_COMMANDS=( "${PRESEED_LATE_COMMANDS[@]:-}" "$@" )

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}

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# Add command to execute at end

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# XXX: ordering?

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function preseed_late_commands_end () {

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    PRESEED_LATE_COMMANDS_END=( "${PRESEED_LATE_COMMANDS_END[@]:-}" "$@" )

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}

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## preseed-files

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# template source

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# template output into install tree

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# paths within installer runtime

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# Add a file to install in preseed, without templating

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# preseed_file <src> <dst>/

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#   if dst is a dir, it must end in /

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function preseed_file () {

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    local src=$1

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    local dst=$2

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    local dir=$(dirname $dst)

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    local tgt_dir="$tgt/$dir"

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    if [ ! -d "$tgt_dir" ]; then

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        cmd mkdir -p "$tgt_dir"

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    fi

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    cmd cp "$src" "$tgt/$dst"

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}

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### Extra

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## Puppet

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PUPPET=

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if [ $opt_puppet ]; then

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    log_info "Puppetizing preseed"

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    PUPPET=yes

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    preseed_packages puppet

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    ## Vars for preseed-files

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    # hostname for puppetmaster (server)

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    PUPPET_MASTER="${opt_puppet_master}"

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    # path ssl data (ssldir)

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    PUPPET_SSLDIR=/etc/puppet/ssl

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fi

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# Invoked during image-customizing process

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function puppet_config () {

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    ## Preseed ssl certs?

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    # copy file to preseed if exists

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    function puppet_preseed_ssl_file () {

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        local name=$1

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        local src=${PUPPET_SOURCE_SSLDIR}/$name

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        local dst=${PUPPET_SSLDIR}/$name

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        if [ -f $src ]; then

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            log_info "puppet: preseed ssl data: $name"

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            cmd preseed_file $src $dst

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        else

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            log_debug "puppet: skip ssl preseed: $name"

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        fi

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    }

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    # ca.pem

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    puppet_preseed_ssl_file certs/ca.pem

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    # guest cert/pkey

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    puppet_preseed_ssl_file certs/${FQDN}.pem

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    puppet_preseed_ssl_file private_keys/${FQDN}.pem

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}

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## Configure GRUB, via preseed/files: /etc/default/grub 

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# Kernel commandline/grub terminal

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# The last console=... for kernel is used as /dev/console, i.e. init output

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if [ $SERIAL_CONSOLE ]; then

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    BOOT_KERNEL_CONSOLE="console=${SERIAL_CONSOLE} console=tty0"

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    BOOT_GRUB_TERMINAL="console serial"

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    # re-generate grub.cfg

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    preseed_late_commands_end "in-target update-grub"

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    # Configure /etc/inittab for serial console

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    preseed_late_commands "in-target sed -i 's/#T0/T0/' /etc/inittab"

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else

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    BOOT_KERNEL_CONSOLE=""

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    BOOT_GRUB_TERMINAL="console"

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fi

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# Kernel boot args (overrides those generated by installer) - default boot option uses args + args_default

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BOOT_KERNEL_ARGS_DEFAULT="quiet"

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BOOT_KERNEL_ARGS="${BOOT_KERNEL_CONSOLE}"

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### Postprocess preseed

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## Preseed files

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## Preseed / config files

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# copy at end of install

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# Additional files to copy

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#PRESEED_INCLUDE_FILES=("preseed/passwords.cfg" "preseed/host.cfg")

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# preseed.cfg 'includes' line

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PRESEED_INCLUDE=${PRESEED_INCLUDES[@]}

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# preseed command execution

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PRESEED_LATE_COMMAND=$(for cmd in "${PRESEED_LATE_COMMANDS[@]}" "${PRESEED_LATE_COMMANDS_END[@]:-}"; do if [ "$cmd" ]; then echo -n "$cmd;" $'\\\n    '; fi; done; echo true)

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## Isolinux

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# Source for install tree isolinux file

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# Automagics for serial boot :)

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#      virt-install assumes we have an X $DISPLAY if given --vnc

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#      but we also want to enable the serial console...

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#      d-i automagically configures the serial boot/login console, but only if the installer is run under serial...

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#      we want to have both :(

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if [ ${DISPLAY:-} ]; then

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    INSTALL_BOOT_CONSOLE=""

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else

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    INSTALL_BOOT_CONSOLE="console=ttyS0"

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fi

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# isolinux installer boot args

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INSTALL_BOOT_ARGS="auto=true priority=critical preseed/file=${PRESEED_MOUNT}/${PRESEED_NAME} preseed/file/checksum=${PRESEED_CHECKSUM} -- ${INSTALL_BOOT_CONSOLE} quiet"

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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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   477

## LVM

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LVM=/sbin/lvm

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## Libvirt 

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# --connect URL

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LIBVIRT=qemu:///system

   483

VIRSH=/usr/bin/virsh

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   485

function virsh () {

   486

    $VIRSH --connect $LIBVIRT "$@"

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}

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