get macs libvirt for brbm network interface

gistfile1.txt

#!/usr/bin/env python
import xml.etree.ElementTree as ET
import libvirt
import sys
import re

""" Find all mac addresses from domains
    to be able to generate the instackenv.json
    manually """

regex = r'^baremetalbrbm_[0-9]$'

def main():
    conn = libvirt.openReadOnly('qemu:///system')
    if conn == None:
        print('Failed to open connection to qemu:///system')
        exit(1)

    domlist = conn.listAllDomains()
    for dom in domlist:
        if not re.search(regex, dom.name()):
            continue

        root = ET.fromstring(dom.XMLDesc())
        searchString = "./devices/interface"
        interface = root.find(searchString)
        if interface is not None:
            searchString = "./source[@network='brbm']"
            source = interface.find(searchString)
            if searchString is not None:
                mac = interface.find('./mac').attrib['address']
                print "%s: %s" % (dom.name(), mac)
            else:
                print "Did not find network for %s" % dom.name()
        else:
            print "Did not find interface entries for %s" % dom.name()

    conn.close()

if __name__ == "__main__":
    main()