[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
[Expired for dnsmasq (Ubuntu) because there has been no activity for 60 days.] ** Changed in: dnsmasq (Ubuntu) Status: Incomplete = Expired -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
Jérôme, it's nice to hear that it is working correctly, but which of the following is the case? 1. Dnsmasq is working correctly in the standard factory configuration. 2. It is working with no-negcache mode activated. 3. It is working with clear-on-reload mode activated. 4. It is working and the circumstances under which the problem occurs haven't presented themselves again. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
It seems to be working correctly now, thank you! -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
Jérôme, can you please see if clear-on-reload fixes the problem, without no-negcache? ** Changed in: dnsmasq (Ubuntu) Status: New = Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
On 24/07/13 20:33, Thomas Hood wrote: Hi Simon, I think we've established that the submitter is having a problem with dnsmasq server, not with NetworkManager-controlled dnsmasq. So it would be interesting to know if clear-on-reload fixes the submitter's problem. (He already said that no-negcache fixes it.) That clear-on-reload is ignored in the D-Bus case sounds like a distinct issue. Agreed, I'll fix that now. What about Stéphane's suggestion that dnsmasq treats failure to find a name in /etc/hosts as a NXDOMAIN? No name in /etc/hosts and no upstream servers - NXDOMAIN reply, but no state changes: the same query repeated after installing an upstream server would result in a query to the upstream server. Simon. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
On 08/07/13 15:02, Thomas Hood wrote: What do you think, Simon? ** Changed in: dnsmasq (Ubuntu) Status: Incomplete = New I'm confused: dnsmasq won't cache a negative answer if it has no upstream servers. To cache a negative answer it has to _receive_ a negative answer (and the negative answer has to have certain information, notably an SOA record to determine the TTL for the negative answer. Whatever is going on, it's more complex. Maybe the problem is that dnsmasq gets a negative answer from some upstream server, and then gets a new upstream server which has the correct information? The solution then is --clear-on-reload but I think NM sets that? Cheers, Simon. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
Whatever is going on, it's more complex. Maybe the problem is that dnsmasq gets a negative answer from some upstream server, and then gets a new upstream server which has the correct information? The solution then is --clear-on-reload but I think NM sets that? but --clear-on-reload doesn't appear to do anything when the upstream nameservers are set via DBus, maybe that's the underlying problem. Simon. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
Hi Simon, I think we've established that the submitter is having a problem with dnsmasq server, not with NetworkManager-controlled dnsmasq. So it would be interesting to know if clear-on-reload fixes the submitter's problem. (He already said that no-negcache fixes it.) That clear-on-reload is ignored in the D-Bus case sounds like a distinct issue. What about Stéphane's suggestion that dnsmasq treats failure to find a name in /etc/hosts as a NXDOMAIN? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
NetworkManager starts dnsmasq with caching completely disabled so that seems unlikely to be a problem with the NM spawned dnsmasq. However the fact that adding the setting to /etc/dnsmasq.d/network- manager fixed it for you, shows that you're not using NetworkManager's dnsmasq but a system dnsmasq instead. Can you confirm that you have the dnsmasq package installed and not only dnsmasq-base? If so, then that bug is invalid as when you install dnsmasq on your system, that'll bypass NetworkManager's own instance and so will run with the default dnsmasq settings (including caching). ** Changed in: dnsmasq (Ubuntu) Status: New = Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
Stéphane wrote: Can you confirm that you have the dnsmasq package installed and not only dnsmasq-base? If so, then that bug is invalid as when you install dnsmasq on your system, that'll bypass NetworkManager's own instance and so will run with the default dnsmasq settings (including caching). I don't fully understand what you say here. 1. If the dnsmasq package is installed alongside network-manager then the dnsmasq server instance will not bypass NM's instance but will forward queries to it. 2. But that's not the main issue. This report seems to be that dnsmasq caches failed lookups as if they were NXDOMAINs. If that's true then it could be regarded as a bug in dnsmasq. You are right that this in no way implies a bug in NM. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
Well for 2), it clearly looks like a case of negative caching (dnsmasq has no upstream server, therefore it only uses /etc/hosts only, if the entry isn't in there, it considers it a NXDOMAIN), upstream also seems to be aware of that behaviour as they offer the option to turn off negative caching. Anyway, I personally don't really care, I just want to confirm that this isn't related to what we have in a default Ubuntu install. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1172467] Re: Dnsmasq caches negative results if it starts before the network is up
What do you think, Simon? ** Changed in: dnsmasq (Ubuntu) Status: Incomplete = New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/1172467 Title: Dnsmasq caches negative results if it starts before the network is up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/1172467/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
