[Pkg-utopia-maintainers] Bug#929010: Bug#929010: Bug#929010: avahi-daemon: /etc/network/if-post-down.d/avahi-daemon is slow on eth0

[Michael Biebl]

Am 16.05.19 um 16:09 schrieb Vincent Lefevre:
> On 2019-05-16 15:59:09 +0200, Vincent Lefevre wrote:
>> On 2019-05-16 14:41:44 +0200, Michael Biebl wrote:
>>> Am 16.05.19 um 14:22 schrieb Vincent Lefevre:
>>>> On 2019-05-16 14:15:37 +0200, Michael Biebl wrote:
>>>>> Looks like you have a local resolver configured in /etc/resolv.conf
>>>>> (which should be reachable via lo, even if eth0 is down).
>>>>
>>>> Yes, /etc/resolv.conf contains
>>>>
>>>> nameserver 127.0.0.1
>>>> nameserver 192.168.1.1
>>>>
>>>> as I use "unbound".
>>>
>>> So host talks to unbound, which apparently takes those 12s to answer.
>>> Not sure what can be done about this in avahi-daemon. Ideas?
>>
>> Should this be regarded as a bug in unbound, then?
> 
> Actually, no, unbound is not the problem:
> 
> Whether I have
> 
> nameserver 127.0.0.1
> nameserver 192.168.1.1
> 
> or just
> 
> nameserver 192.168.1.1
> 
> in /etc/resolv.conf, "time host -t soa local." shows a 10-second
> timeout.

If you don't have network access, then this is expected, I'd say.

What happens, if you only list your local 127.0.0.1 in /etc/resolv.conf?

> Or would the old /etc/resolv.conf (with 127.0.0.1) be cached somewhere
> on the system?
> 

Well, the assumption that /usr/lib/avahi/avahi-daemon-check-dns.sh makes
is, that if a local resolver is configured in /etc/resolv.conf, then it
is safe to assume that host lookup can be done, even if there is not
default route (== network access).




-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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