On 22 October 2014 23:19, Gavin Panella <gavin.pane...@canonical.com> wrote: > On 22 October 2014 22:03, Graham Binns <graham.bi...@canonical.com> wrote: >> This works perfectly: > > Awesome, that's great. Sort of brain-dump follows: > > How does this work for networks that don't line up with IPv4 octets? For > example, for a dynamic range that covers 192.168.0.0/23, would we need > to write the following? > > $GENERATE 1-254 $.0.168.192.in-addr.arpa. IN PTR no-name-yet-$.maas. > $GENERATE 1-254 $.1.168.192.in-addr.arpa. IN PTR no-name-yet-$.maas. > > A /16 would need 256 lines.
If I'm reading [1] right (and I may not be; it's late), we could do something like this: $GENERATE 1-254 $.$.0.10.in-addr.arpa. IN PTR no-name-yet-$.$.maas. But a quick check of that on my local MAAS suggests it doesn't work. I'll dig further tomorrow. > Is this expanded macro-like within BIND, or is it compiled into a rule? > It may make a difference to performance. AFAICT, it's expanded rather than compiled into a rule. > I assume we'll do this only for IPv4? If it's compiled to a rule, we > /could/ do it for IPv6 too, but that may be a slope down which we don't > want to slip. Ultimately we want to steer people towards reserving IP > addresses via MAAS's API. True. That said, if we fix this for v6 too it means that some very nasty hacks in charms can be canned, and that's not a terrible thing for our users. If it's easy to do, I say we might as well be consistent. If v6 causes (as I suspect it will) considerable headaches here, then we'll stick with v4 and push for everyone to use APIs as they should be doing. > Is this enough to satisfy RabbitMQ? Some services like to make sure that > they can round-trip through DNS, i.e. that the PTR record resolves to a > name that then resolves back to the starting address. I haven't checked that out yet, but it's a good point. We could always use $GENERATE to generate the forward zone too, though, if your first point doesn't make that entirely onerous. > We could choose the prefix to encourage people to reserve addresses. For > example, "dynamic-$", "anon-$", "temporary-$", or "do-not-use-$", in > order of severity. Unfortunately this is bikeshed territory, so I'm > going to put myself out of the running by voting for > "do-not-rely-on-this-you-get-to-keep-the-pieces-and-give-me-one-million-dollars-$". "use-this-at-your-peril-$.maas". -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1382190 Title: LXCs assigned IPs by MAAS DHCP lack DNS PTR entries To manage notifications about this bug go to: https://bugs.launchpad.net/maas/+bug/1382190/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
