map.sh

#!/bin/bash

#http://docs.openstack.org/network-admin/admin/content/figures/2/figures/under-the-hood-scenario-2-ovs-compute.png
#http://www.markhneedham.com/blog/2013/06/26/unixawk-extracting-substring-using-a-regular-expression-with-capture-groups/

ACTIVE_INSTANCE_IDS=`nova list --all-tenants | grep ACTIVE | awk '{print $2}'`

length=115
printf -v line '%*s' "$length"
echo ${line// /-}

printf "|%30s|%15s|%15s|%15s|%15s|%9s|%s|%s\n" "instance" "tap" "linuxbridge" "veth_pair1" "veth_pair2" "ovsbridge" "tag" "vlan"

echo ${line// /-}
for INSTANCE in ${ACTIVE_INSTANCE_IDS} 
do 
	INSTANCE_NAME=`nova list --all-tenants | grep "${INSTANCE}" | awk '{print $4}'`
	LINUX_BRIDGE=`virsh domiflist ${INSTANCE} | grep -i '[0-9A-F]\{2\}\(:[0-9A-F]\{2\}\)\{5\}' | awk '{print $3}'`
	
	TAP=`virsh domiflist ${INSTANCE} | grep -i '[0-9A-F]\{2\}\(:[0-9A-F]\{2\}\)\{5\}' | awk '{print $1}'`
	
	VETH_PAIR1=`brctl show ${LINUX_BRIDGE} | grep -i qvb | awk '{print $4}'`
	PEER_IFINDEX=`ethtool -S ${VETH_PAIR1} | grep -i peer_ifindex | awk '{print $2}'`
	VETH_PAIR2=`ip link | grep "^${PEER_IFINDEX}:" | awk '{print $2}' | sed "s/://g"`
		
	OVS_BRIDGE=`ovs-vsctl port-to-br ${VETH_PAIR2}`
	TAG=`ovs-vsctl list port ${VETH_PAIR2} | grep -i tag | awk '{print $3}'`
	VLAN=`ovs-ofctl dump-flows br-int | grep "mod_vlan_vid:${TAG}" | gawk '{ match($0, /dl_vlan=([0-9]+)/, arr); if(arr[1] != "") print arr[1] }'`

	printf "|%30s|%15s|%15s|%15s|%15s|%9s|%d|%d\n" ${INSTANCE_NAME} ${TAP} ${LINUX_BRIDGE} ${VETH_PAIR1} ${VETH_PAIR2} ${OVS_BRIDGE} ${TAG} ${VLAN} 
	echo ${line// /-}
	
done