[openstack-dev] [stable][neutron] minimal dnsmasq version

Kyle Mestery mestery at mestery.com
Wed Jan 7 14:57:40 UTC 2015

On Wed, Jan 7, 2015 at 8:21 AM, Ihar Hrachyshka <ihrachys at redhat.com> wrote:

> Hi all,
> I've found out that dnsmasq < 2.67 does not work properly for IPv6 clients
> when it comes to MAC address matching (it fails to match, and so clients
> get 'no addresses available' response). I've requested version bump to 2.67
> in: https://review.openstack.org/145482
> Good catch, thanks for finding this Ihar!

> Now, since we've already released Juno with IPv6 DHCP stateful support,
> and DHCP agent still has minimal version set to 2.63 there, we have a
> dilemma on how to manage it from stable perspective.
> Obviously, we should communicate the revealed version dependency to
> deployers via next release notes.
> Should we also backport the minimal version bump to Juno? This will result
> in DHCP agent failing to start in case packagers don't bump dnsmasq version
> with the next Juno release. If we don't bump the version, we may leave
> deployers uninformed about the fact that their IPv6 stateful instances
> won't get any IPv6 address assigned.
> An alternative is to add a special check just for Juno that would WARN
> administrators instead of failing to start DHCP agent.
> Comments?
> Personally, I think the WARN may be the best route to go. Backporting a
change which bumps the required dnsmasq version seems like it may be harder
for operators to handle.


> /Ihar
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