From c59dc1386f3d9a5bec3457aee8417c1deb6513e7 Mon Sep 17 00:00:00 2001 From: Julia Kreger Date: Thu, 13 Jun 2019 19:29:21 +0000 Subject: [PATCH] Update qemu hook to facilitate Multicast mdns AND IPv6 Neighbour Discovery Protocol use multicast packets and the macvtap interface drops these packets by default. Since there is no way to tell libvirt to make this better, lets at least use the hook to make the macvtap interface change such that multicast packets will pass. With this, iPXE should work... and mdns should be testable in CI. Change-Id: I397d211675fd7668b8fd19e989d740d6bad2c70e --- devstack/files/hooks/qemu.py | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/devstack/files/hooks/qemu.py b/devstack/files/hooks/qemu.py index 2e21d7e12c..872d5e1014 100755 --- a/devstack/files/hooks/qemu.py +++ b/devstack/files/hooks/qemu.py @@ -17,8 +17,10 @@ import datetime import os import re +import subprocess import sys + # This script is run as a libvirt hook. # More information here: https://libvirt.org/hooks.html @@ -42,6 +44,18 @@ def main(): guest_name = sys.argv[1] action = sys.argv[2] + if action == "started": + interfaces = str( + subprocess.check_output( + ['ip', 'link', 'show', 'type', 'macvtap'] + )).split("\n") + for iface_line in interfaces: + if 'macvtap' in iface_line: + iface_string = iface_line.split('@') + ifaces = iface_string[0].split(' ') + subprocess.call(['ip', 'link', 'set', 'dev', ifaces[1], + 'multicast', 'on', 'allmulticast', 'on']) + if action != "release": return