#!/bin/bash
# create-arista-veos-image.sh V1.1
# HS-Fulda - sebastian.rieger@informatik.hs-fulda.de
#
# changelog:
# V1.1  added injection of config defined in VM Maestro using config-drivex

# usage
if [ ! $# -eq 3 ] ; then
  echo -e "usage: $0 <Aboot-veos-serial-version.iso> <vEOS-version.vmdk> <new glance image name>, e.g.:\n"
  echo "$0 Aboot-veos-serial-2.0.8.iso vEOS-4.13.4F.vmdk vEOS"
  exit -1
fi

# sudo check
if [ ! $UID -eq 0 ] ; then
  echo "Insufficient privileges. Please consider using sudo -s."
  exit -1
fi

ABOOT_SERIAL_ISO=$1
ABOOT_SERIAL_ISO_BASENAME=$(basename -s .iso $1)
VEOS_VMDK=$2
VEOS_VMDK_BASENAME=$(basename -s .vmdk $2)
GLANCE_IMAGE_NAME=$3
GLANCE_IMAGE_RELEASE=$VEOS_VMDK_BASENAME-$ABOOT_SERIAL_ISO_BASENAME
TMP_NAME="vEOS-$GLANCE_IMAGE_RELEASE"

echo
echo "Creating vEOS image..."
echo "==========================================================="

# create a copy of Aboot bootloader and extend it to 3G
cp $1 $TMP_NAME.raw
truncate -s +3G $TMP_NAME.raw

echo
echo "Extracting partitions from vEOS vmdk..."
echo "==========================================================="

# convert vmdk to raw and extract two partitions in it
qemu-img convert -O raw $2 $VEOS_VMDK_BASENAME.raw
kpartx -av $VEOS_VMDK_BASENAME.raw
dd if=/dev/loop0p1 of=$VEOS_VMDK_BASENAME-p1.raw
dd if=/dev/loop0p2 of=$VEOS_VMDK_BASENAME-p2.raw
kpartx -d $VEOS_VMDK_BASENAME.raw

echo
echo "Injecting rc.eos startup script to get switch config..."
echo "==========================================================="

# inject rc.eos script in first partition of the image, to get switch config defined in VM Maestro (config-drive)
mkdir swi
mount -o loop $VEOS_VMDK_BASENAME-p1.raw swi
cd swi
cat << EOF > rc.eos
#!/bin/sh
#
# startup script to get node configs from VM Maestro
#

echo "Getting switch config from config drive..."
echo "=========================================="
mkdir /config-drive
mount /dev/sdb1 /config-drive

echo "Getting ip address for ma1 via dhcp..."
echo "=========================================="
dhclient -r ma1
dhclient -1 -v ma1 >/mnt/flash/dhclient.log
IP=\$(ip addr show ma1 | grep inet | tr -s ' ' | cut -d ' ' -f 3 | sed s/"\/"/"\\\\\\\\\/"/g)
echo \$IP
sed s/"! ip of ma1 configured on launch"/"ip address \$IP"/g /config-drive/veos_config.txt >/mnt/flash/startup-config.tmp
cat /mnt/flash/startup-config.tmp
echo

echo "Copying switch config from config drive..."
echo "=========================================="
cp /mnt/flash/startup-config.tmp /mnt/flash/startup-config
EOF
chmod 755 rc.eos
cd ..
umount swi
rmdir swi

echo
echo "Injecting new partitions from vEOS vmdk in Aboot image..."
echo "==========================================================="

# calulate size of the two partitions
PART1_START=$(fdisk -l $VEOS_VMDK_BASENAME.raw | grep "\.raw1" | tr -s " " | cut -d ' ' -f 3)
PART1_END=$(fdisk -l $VEOS_VMDK_BASENAME.raw | grep "\.raw1" | tr -s " " | cut -d ' ' -f 4)
PART1_LENGTH=$(expr $PART1_END - $PART1_START)

PART2_START=$(fdisk -l $VEOS_VMDK_BASENAME.raw | grep "\.raw2" | tr -s " " | cut -d ' ' -f 2)
PART2_END=$(fdisk -l $VEOS_VMDK_BASENAME.raw | grep "\.raw2" | tr -s " " | cut -d ' ' -f 3)
PART2_LENGTH=$(expr $PART2_END - $PART2_START)

# append the two partitions from vmdk in the bootloader iso
echo -e "n
p


+$PART1_LENGTH
t
2
c
a
2
n
p


+$PART2_LENGTH
t
3
12
w" | fdisk $TMP_NAME.raw >/dev/null

# copy the partitions from vEOS vmdk to new image 
kpartx -av $TMP_NAME.raw
dd if=$VEOS_VMDK_BASENAME-p1.raw of=/dev/loop0p2
dd if=$VEOS_VMDK_BASENAME-p2.raw of=/dev/loop0p3
kpartx -d $TMP_NAME.raw

echo
echo "Convert new image to qcow2..."
echo "==========================================================="

# convert raw to qcow2
qemu-img convert -O qcow2 $TMP_NAME.raw $TMP_NAME.qcow2

echo
echo "Cleaning up..."
echo "==========================================================="

#cleanup
rm $TMP_NAME.raw
rm $VEOS_VMDK_BASENAME-p1.raw
rm $VEOS_VMDK_BASENAME-p2.raw
rm $VEOS_VMDK_BASENAME.raw

echo
echo "Importing image into glance..."
echo "==========================================================="
glance image-create --container-format bare --disk-format qcow2 --is-public true --name $GLANCE_IMAGE_NAME --file $TMP_NAME.qcow2 --property hw_disk_bus=ide --property serial=1 --property hw_vif_model=e1000 --property hw_cdrom_type=ide --property release="$GLANCE_IMAGE_RELEASE" --property subtype=IOSv --property config_disk_type=disk

#testing:
#
#  nova boot --image "Arista vEOS Disk" --flavor m1.small veos --nic net-id=abc7ad47-55fd-4396-8d31-91dd4d41a18a --nic net-id=abc7ad47-55fd-4396-8d31-91dd4d41a18a --nic net-id=abc7ad47-55fd-4396-8d31-91dd4d41a18a --nic net-id=abc7ad47-55fd-4396-8d31-91dd4d41a18a --nic net-id=abc7ad47-55fd-4396-8d31-91dd4d41a18a
#
#  using VM Maestro, the image can be chosen as "VM image", e.g., for an IOSv or IOSvL2 node