Am Fri, 5 May 2017 20:18:41 +0200 schrieb Lennart Poettering <lenn...@poettering.net>:
> On Fri, 05.05.17 01:01, Kai Krakow (hurikha...@gmail.com) wrote: > > > Hello! > > > > Why is systemd-resolved switching DNS servers all day long? This > > doesn't seem to be right... > > If you turn on debug logging, you should see an explanation right > before each switch. I figure we should choose the log levels more > carefully, so that whenever we switch we also log the reason at the > same level... It looks like this all has to do with timeouts: Mai 06 14:17:09 jupiter systemd-resolved[5585]: Cache miss for ssl.gstatic.com IN AAAA Mai 06 14:17:09 jupiter systemd-resolved[5585]: Transaction 54375 for <ssl.gstatic.com IN AAAA> scope dns on enp5s0/*. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Using feature level UDP for transaction 54375. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Using DNS server fe80::b248:7aff:fee7:f438%2 for transaction 54375. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Sending query packet with id 54375. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Timeout reached on transaction 33004. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Retrying transaction 33004. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Switching to DNS server 2a02:8109:1ec0:6f5:5667:51ff:feea:385f for interface enp5s0. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Cache miss for ssl.gstatic.com IN A Mai 06 14:17:09 jupiter systemd-resolved[5585]: Transaction 33004 for <ssl.gstatic.com IN A> scope dns on enp5s0/*. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Using feature level UDP for transaction 33004. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Using DNS server 2a02:8109:1ec0:6f5:5667:51ff:feea:385f for transaction 33004. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Sending query packet with id 33004. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Processing incoming packet on transaction 33004. (rcode=SUCCESS) Mai 06 14:17:09 jupiter systemd-resolved[5585]: Not validating response for 33004, used server feature level does not support DNSSEC. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Added positive unauthenticated cache entry for ssl.gstatic.com IN A 143s on */INET6/2a02:8109:1ec0:6f5:5667:51ff:feea:385f Mai 06 14:17:09 jupiter systemd-resolved[5585]: Transaction 33004 for <ssl.gstatic.com IN A> on scope dns on enp5s0/* now complete with <success> from network (unsigned). Mai 06 14:17:09 jupiter systemd-resolved[5585]: Sending response packet with id 42127 on interface 1/AF_INET. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Sending response packet with id 22131 on interface 1/AF_INET. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Processing incoming packet on transaction 54375. (rcode=SUCCESS) Mai 06 14:17:09 jupiter systemd-resolved[5585]: Not validating response for 54375, used server feature level does not support DNSSEC. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Added positive unauthenticated cache entry for ssl.gstatic.com IN AAAA 203s on enp5s0/INET6/fe80::b248:7aff:fee7:f438 Mai 06 14:17:09 jupiter systemd-resolved[5585]: Transaction 54375 for <ssl.gstatic.com IN AAAA> on scope dns on enp5s0/* now complete with <success> from network (unsigned). Mai 06 14:17:09 jupiter systemd-resolved[5585]: Freeing transaction 33004. Mai 06 14:17:09 jupiter systemd-resolved[5585]: Sent message type=method_return sender=n/a destination=:1.352 object=n/a interface=n/a member=n/a cookie=234 reply_cookie=2 error=n/a Mai 06 14:17:09 jupiter systemd-resolved[5585]: Sent message type=method_call sender=n/a destination=org.freedesktop.DBus object=/org/freedesktop/DBus interface=org.freedesktop.DBus member=RemoveMatch cookie=235 reply_cookie=0 erro Mai 06 14:17:09 jupiter systemd-resolved[5585]: Got message type=method_return sender=org.freedesktop.DBus destination=:1.273 object=n/a interface=n/a member=n/a cookie=181 reply_cookie=235 error=n/a Mai 06 14:17:09 jupiter systemd-resolved[5585]: Freeing transaction 54375. I just don't unterstand why, because all these nameservers work perfectly well when used directly and not through the stub resolver. -- Regards, Kai Replies to list-only preferred. _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
