libvirt-get_vm_mac_ip.sh

#!/bin/bash 
# ssh to libvirt hosts and retrieve mac/ip addresses for all vms

#vm network prefix
network_prefix="10.10.10"

#vm hosts
hosts="
vm-host4
vm-host5
vm-host6
"
#host to ssh into to do arp resolution, must be on same network as vms
proxy_host="dalek"

#whether or not to attempt to ssh into the remote host to get version, if not set to 1 we will only classify the vm as linux/windows based on port 22 being open
get_os_version=1

if [ "$get_os_version" == 1 ];then
	#start up ssh agent if we're checking os version
	eval "$(ssh-agent -s)" >/dev/null 2>&1
	ssh-add "$HOME/.ssh/id_rsa" >/dev/null 2>&1
fi

vms=
for i in $hosts;do
    if [ ! -z "$i" ];then
        vms+=$(ssh "$i" "bash -c '
			vms=\$(virsh --connect qemu:///system list --name) && \
			for vm in \$vms;do
				mac=\$(virsh --connect qemu:///system domiflist \"\$vm\"|grep --color=never vnet|head -n1|awk \"{print \\\$5}\")
				if [ -z \"\$mac\" ];then 
					mac=\"NOTFOUND\" 
				fi
				echo \"'$i' \$vm \$mac\" 
			done
			'") 2>/dev/null
        if [ -z "$vms" ];then
            errors+="failed to retrieve vm list from $i."
        fi
	fi
	vms+=$'\n'
done

host=${proxy_host:-$i}

#ssh into host and get ips
echo "$vms"|ssh "$host" '
	#populate arp table on host
	for ip in '${network_prefix}'.{1..254}; do ping -W1 -c1 ${ip} >/dev/null 2>&1 & done;wait

	#wait up to 30 seconds for arp table to be populated
	for i in $(seq 1 30);do
		if [ $(ip neighbor|grep --color=never "INCOMPLETE" -c 2>/dev/null) -eq 0 ];then
			break
		else
			sleep 1
		fi
	done			

	#get ips from arp table
	while read line;do
	(
	    if [ ! -z "$line" ];then
			IFS=" " read vmhost name mac <<< $(echo "$line")
	            ip=$(ip neighbor|grep --color=never -i "$mac" 2>/dev/null|cut -d " " -f1|tail -n1 2>/dev/null)
	            if [ -z "$ip" ];then #no ip found
					ip="NOTFOUND"
					os="NOTFOUND"
				else
					if [ "'$get_os_version'" == "1" ];then #get linux version
						os=$(ssh -q -o ConnectTimeout=2 $ip '\''
						if [ -e /etc/debian_version ];then
							if [ -f /etc/os-release ];then
								. /etc/os-release
							fi
							ID=${ID:-debian}
							VERSION_ID=${VERSION_ID:-$(cat /etc/debian_version)}
							echo -n "linux-${ID}-${VERSION_ID}"
						elif [ -e /etc/redhat-release ];then
							ver=$(cat /etc/redhat-release)
							echo -n "linux-$(echo $ver|tr "[:upper:]" "[:lower:]"|cut -d " " -f1)-$(echo $ver|sed "s/[^0-9.]//g")"
						fi'\''||(echo "garbage"|nc -w 1 $ip 22 >/dev/null 2>&1&&echo linux||echo windows))
					else ##fall back to checking ip for port 22
					if hash nc;then 2>/dev/null
						os=$(echo "garbage"|nc -w 1 $ip 22 >/dev/null 2>&1&&echo linux||echo windows)
					else
						os="NOTFOUND"
					fi
				fi
		fi
		echo -e "$vmhost\t$name\t$ip\t$mac\t$os"
		fi
	)&
done' | sort

if [ ! -z "$errors" ];then
    echo -e "\nerrors:\n$errors" 1>&2
fi