v2v.sh

#!/bin/bash
#
# v2v.sh
#
# USAGE: v2v.sh  [-h] -i inputfile -o outputdir -l logfile -t tempdir [-L sysprep_log]
# 
# DESCRIPTION:
#	virtual-to-virtual script for American Express to migrate an OVA file from disk,
#	(which is generated by VMWare's 'ovftool') to a raw image suitable for OpenStack.
#
# LIMITATIONS:
#	Below is an inclusive list of guest Operating Systems which are supported:
#		- Windows 2008 R2
#		- RHEL6
#		- RHEL7
#
# REQUIREMENTS: rpm virt-v2v v1.28+
#		Runs under RHEL7
#		Available from http://people.redhat.com/~rjones/libguestfs-RHEL-7.1-preview/ 
#
#----------------------------------------------------------------------------------------------------

ulimit -c unlimited

v2v_help() {
cat << EOF 
Usage: ${0##*/} [-h] -i inputfile -o outputdir -l logfile -t tempdir -n #nics [-d] [-I IPADDR]
Convert an OVA file to a raw image file

	-h	show this help screen
	-i	full path to input OVA file (mandatory)
	-o	existing directory to which output file will be written (mandatory)
	-l	full path to logging file that will be made (mandatory)
	-t	full path to temporary directory (used to untar the ova) (mandatory)
	-L	full path to logging file for virt-sysprep
	-n	number of nics that will be converted to dhcp. defaults to 1 to change eth0. 0 will not replace eth0, using existing eth0.
	-I	IP Address for vm
EOF
}

stop_time() {
   echo "Stop time:  `date`"
}

V2V_INPUT=""
V2V_OUTPUT=""
V2V_TMPDIR=""
V2V_LOG=""
# This will break virt-v2v
V2V_DEBUG_ARGS="-x -v"
SDA_PATH=""
SYSPREP_LOG=""
NUM_NICS=1

if [[ $1 == "" ]]; then 
	echo -e "No options specified\n"
	v2v_help >&2
	exit 1
fi
   
##
## 
##
   
while getopts "hi:l:o:t:d:L:n:I:" opt; do
	case "$opt" in

		h)
			v2v_help
			exit 0
			;;
		i)	
			V2V_INPUT=$OPTARG
			;;
		l)
			V2V_LOG=$OPTARG
			;;
		o)
			V2V_OUTPUT=$OPTARG
			;;
		t)
			V2V_TMPDIR=$OPTARG
			;;
		d)
			V2V_DEBUG_ARGS="-x -v"
			;;
		L)
			echo "got $OPTARG"
			SYSPREP_LOG=$OPTARG
			;;
		n)
			NUM_NICS=$OPTARG
			;;
		I)
			IPADDR=$OPTARG
			;;
		\?)
			echo -e "Invalid option specified\n"
			v2v_help >&2
			stop_time
			exit 1
			;;
		':')	
			echo "Option -$OPTARG requires an argument" >&2
	esac
done

##
## Input File (-i) is mandatory; verify it was specified with -i and that it exists.
##

if [ x$V2V_INPUT == "x" ]; then
   	echo "ERROR: Input ova file (-i) is mandatory but was not specified.  "
	v2v_help
	stop_time
	exit 1
fi
if [ ! -f ${V2V_INPUT} ]; then
	echo "Input file ${V2V_INPUT} does not exist.  Exiting...."
	stop_time
	exit 1
fi

##
## Output Directory (-o) is mandatory; verify it was specified with -o and that it exists.
##

if [ x$V2V_OUTPUT == "x" ]; then
   	echo "ERROR: Output directory (-o) is mandatory but was not specified.  "
	v2v_help
	stop_time
	exit 1
fi
if [ ! -d ${V2V_OUTPUT} ]; then
	echo "Ouput directory ${V2V_OUTPUT} does not exist.  Creating..."
	mkdir -p ${V2V_OUTPUT}
	#stop_time
	#exit 1
fi

##
## Output Directory must not be the same as the input directory.
##

if [[ $(dirname ${V2V_INPUT}) == ${V2V_OUTPUT} ]]; then
   	echo "ERROR: Attempting to overwrite input file"
	stop_time
	exit 1
fi

##
## Log file (-l) is mandatory; verify it was specified by -l argument and that its directory exists.
##

if [ x$V2V_LOG == "x" ]; then
   	echo "ERROR: Log file is mandatory but was not specified.  "
	v2v_help
	stop_time
	exit 1
fi
if [ ! -d $(dirname ${V2V_LOG}) ]; then
	echo "Directory for Log file ${V2V_LOG} does not exist.  Exiting..."
	stop_time
	exit 1
fi

##
## Temp dir (-t) is mandatory; verify it was specified by -t argument and that it exists.
##

if [ x$V2V_TMPDIR == "x" ]; then
   	echo "ERROR: TMP directory is mandatory but was not specified.  "
	v2v_help
	stop_time
	exit 1
fi
if [ ! -d ${V2V_TMPDIR} ]; then
	echo "Temp directory ${V2V_TMPDIR} does not exist.  Exiting..."
	stop_time
	exit 1
fi

export TMPDIR=${V2V_TMPDIR}

export LIBGUESTFS_BACKEND=direct

##
## RPM virtio-win is required to convert Windows images (but not RHEL images).  I cannot tell if the 
## image being converted here is a Windows or RHEL image, so I'll complain either way.  
## Once it's installed, we won't need to deal with the decision again.
##

rpm -q virtio-win &>/dev/null 
if [ "$?" -ne "0" ]; then
	echo "Package virtio-win is not installed. Please install the virtio-win rpm on this machine and try again.  Exiting..."
	stop_time
	exit 1
fi

##
## Convert the image to a raw image, place it in $V2V_OUTPUT, and log the work
##


echo "Converting ova file ${V2V_INPUT} to raw file in ${V2V_OUTPUT}, logging to ${V2V_LOG} "
echo "Start time:  `date`"

if [[ ${V2V_INPUT} == *.ova ]]
then
	/usr/bin/virt-v2v ${V2V_DEBUG_ARGS} -i ova ${V2V_INPUT} -o local -of raw -os ${V2V_OUTPUT} > ${V2V_LOG} 2>&1  
elif [[ ${V2V_INPUT} == *.ovf ]]
then
	XMLFILE=/tmp/.xml.virt.$$
	/mnt/migrate/tools/parse_rhev_ovf.py -f ${V2V_INPUT} > $XMLFILE
	/usr/bin/virt-v2v ${V2V_DEBUG_ARGS} -i libvirtxml ${XMLFILE} -o local -of raw -os ${V2V_OUTPUT} > ${V2V_LOG} 2>&1  
	rm -f $XMLFILE
else
	echo "Error, unsupported input file!"
	exit 1
fi


##
## Run virt-sysprep if the log file has been provided. Build out the command by getting any converted disks a through z in the v2v output
##
if [ ! -z "$SYSPREP_LOG" ]; then
        echo "Running virt-sysprep against disks in ${V2V_OUTPUT} and logging to ${SYSPREP_LOG}"
        call_later="/usr/bin/virt-sysprep --enable net-hwaddr,udev-persistent-net,customize "
	if [ -n "$IPADDR" ]
	then
		BOOTPROTO=none
		NETCFG="IPADDR=$IPADDR\nPREFIX=24\nGATEWAY=172.16.0.1\nDNS1=172.16.0.25\n"
	else
		BOOTPROTO=dhcp
		NETCFG=""
	fi
	call_later+=" --run-command 'if [ ! -f /etc/sysconfig/network-scripts/ifcfg-eth0 ]; then echo -e \"NAME=eth0\nDEVICE=eth0\nBOOTPROTO=$BOOTPROTO\n$NETCFG\nONBOOT=yes\" > /etc/sysconfig/network-scripts/ifcfg-eth0; fi' "
	for f in "$V2V_OUTPUT/"*-sd[a-z]; do 
		call_later+=" -a $f" 
	done
	call_later+=" > ${SYSPREP_LOG} 2>&1"
	echo $call_later
	eval $call_later
fi

stop_time