install

#!/usr/bin/env bash

CONFIG=config
TEMPDIR=$(mktemp -d isoXXXX)

if [ -f "$CONFIG" ]; then
    . "$CONFIG"
else
    echo "No config file found."
    exit 1
fi


INSTANCE_ID=v01

if [ -z "${1}" ]; then 
    USER_DATA=user-data
else
    USER_DATA="$1"
fi
cp "$USER_DATA" "$TEMPDIR"

if [ -z "${POOL_NAME}" ]; then 
    POOL_NAME=default
fi
if [ -z "${POOL_PATH}" ]; then
    POOL_PATH=$( virsh pool-dumpxml $POOL_NAME | xmllint --xpath '//target/path/text()' - | head -n 1 )
fi
if [ -z "${RAM}" ]; then
    RAM=1024
fi
if [ -z "${VCPUS}" ]; then
    VCPUS=1
fi

if [ -z "${GRAPHICS}" ]; then
    GRAPHICS=false
fi

if [ ${GRAPHICS} = true ]; then
    GRAPHICS="vnc,listen=0.0.0.0"
else
    GRAPHICS=none
fi

# Scrape hostname from user-data file
# From RFC 952 http://tools.ietf.org/html/rfc1123
HOSTNAME_REGEX='(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])$'
HOSTNAME=$( grep -i 'hostname' "$USER_DATA" | grep -iEo "$HOSTNAME_REGEX" | tail -1 )

cat <<EOF > ${TEMPDIR}/meta-data
instance-id: ${HOSTNAME}-${INSTANCE_ID}
local-hostname: $HOSTNAME
hostname: $HOSTNAME
EOF

cd $TEMPDIR
genisoimage -output "${HOSTNAME}-config.iso" -volid cidata -joliet -rock user-data meta-data
cd - > /dev/null

virsh vol-create-as \
    --pool $POOL_NAME \
    --name "${HOSTNAME}-config.iso" \
    --capacity 5242880 \
    --format raw

virsh vol-upload \
    --vol ${HOSTNAME}-config.iso \
    --pool $POOL_NAME \
    --file "${TEMPDIR}/${HOSTNAME}-config.iso"

rm -rf $TEMPDIR

BASE_SIZE=$( qemu-img info "$BASE_IMG" | grep -Eo '[0-9]+ bytes' | grep -Eo '[0-9]+' )

virsh vol-create-as \
    --pool $POOL_NAME \
    --name ${HOSTNAME}.img \
    --capacity $BASE_SIZE \
    --format qcow2 \
    --prealloc-metadata

virsh vol-upload \
    --vol ${HOSTNAME}.img \
    --pool $POOL_NAME \
    --file "$BASE_IMG"

if [ -n "${DISK}" ]; then
    virsh vol-resize \
        --vol ${HOSTNAME}.img \
        --pool $POOL_NAME \
        --capacity "$DISK"
fi

echo Installing:
echo "Hostname:  $HOSTNAME"
echo "Pool Name: $POOL_NAME"
echo "Pool Path: $POOL_PATH"

virt-install \
    --name $HOSTNAME \
    --ram $RAM \
    --vcpus $VCPUS \
    --cpu host \
    --graphics ${GRAPHICS} \
    --autostart \
    --memballoon virtio \
    --network bridge=br0,model=virtio \
    --boot hd \
    --disk vol=${POOL_NAME}/${HOSTNAME}.img,format=qcow2,bus=virtio,cache=writeback \
    --disk vol=${POOL_NAME}/${HOSTNAME}-config.iso,bus=virtio