virt_build

#!/bin/ksh -p

if [ ! -w /etc/passwd ]
then
  echo Not root
  exit
fi

IMAGES=/var/lib/libvirt/images
XML=/etc/libvirt/qemu

file=0
graphics="--nographics"
console="console=ttyS0,9600"
text="text"
os=7
ks=""
repo=""
hardware=""
ram=1536  # During install phase
STANDARD_RAM=512
dsize=10  # Disk size in GB
lvm=Raid10
ksdev=eth0

while getopts fg678d:l:r: OPT
do
  case $OPT in
    f) file=1 ;;
    6) ks=6 ; repo=http://repo/CentOS/DVD/CentOS-6 ;;
    7) ks=7 ; repo=http://repo/CentOS/DVD/CentOS-7 ;;
    8) ks=8 ; repo=http://repo/CentOS/DVD/CentOS-8/ ; ksdev=ens3 ; ram=3073 ;;
    g) graphics="" ; text="" ; console="" ;;
    d) dsize=$OPTARG ;;
    l) lvm=$OPTARG ;;
    r) STANDARD_RAM=$OPTARG ;;
  esac
done

if [ -z "$repo" ]
then
  echo Need at least -6 or -7 or -8
  exit
fi

shift $(($OPTIND - 1))

machine=$1
mac=$2  # optional

if [ -z "$machine" ]
then
  echo "Syntax: ${0##*/} -6|-7|-8 [-f] [-g] [-d#] [r#] [-l LVM] machine_name [MAC]"
  echo "  f==> files, not LVM."
  echo "  d==> disk size in Gb; default=4"
  echo "  l==> LVM volume group; default=Raid10"
  echo "  r==> RAM size in Mb; default=512"
  exit
fi

if [ $file = 1 ]
then
  destfile=$IMAGES/$machine.img
else
  destfile=/dev/$lvm/vm.$machine
fi

if [ -r $XML/$machine.xml ]
then
  echo $XML/$machine.xml already exists
  echo aborted
  exit
fi

if [ -e $destfile ]
then
  echo $destfile already exists
  echo aborted
  exit
fi

if [ -n "$mac" ]
then
  case $mac in
    [0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]:[0-9A-Fa-f][0-9A-Fa-f]) # Looks good!
                      mac=",mac=$mac"
                      ;;
                   *) echo Bad format MAC address
                      exit
  esac
fi

echo Building VM
echo Starting at $(date)
d=$(date +%s)

if [ $file = 0 ]
then
  lvcreate -L ${dsize}G -n vm.$machine $lvm || exit
else
  destfile=$destfile,size=${dsize}
fi

set -x

virt-install \
--noreboot \
-n $machine \
-r $ram \
--vcpus=1 \
--os-variant=rhel$os \
--accelerate \
-v \
--network=bridge=br0$mac,target=v-$machine \
--disk path=$destfile \
-l $repo \
$graphics $hardware \
-x "ks=http://10.0.0.137/CentOS/kickstart/centos$ks.cfg ksdevice=$ksdev ip=dhcp $console"

virsh setmaxmem $machine ${STANDARD_RAM}M --config
virsh setmem $machine ${STANDARD_RAM}M --config
virsh start $machine

echo Build finished at $(date)
virsh console $machine