[12:41] <zyga-mbp> hello, I'm having issues resolving archive URLs in Ubuntu 20.10 in GCE
[12:41] <zyga-mbp> http://us-east1.gce.archive.ubuntu.com/ubuntu groovy/main amd64 libthai-data returns temporary DNS failures
[12:42] <zyga-mbp> it started earlier today
[12:42] <zyga-mbp> but dose not affect 20.04 or other releases
[13:57] <Aison`> my postfix server always hangs for a few second when acception an mail on the submission port.
[13:57] <Aison`> https://paste.ubuntu.com/p/NCvrmHwkJj/
[13:57] <Aison`> it looks like there is some kind of dns lookup and the answer times out
[13:58] <Aison`> the strange thing is, that nslookup <foobar> 127.0.0.53 is very fast
[13:59] <sdeziel> Aison': could you share the (main.cf and master.cf) sections of config for that submission instance?
[14:00] <Aison`> main.cf: https://paste.ubuntu.com/p/cVNMNKQq8S/
[14:00] <Aison`> master.cf: https://paste.ubuntu.com/p/xwT2ZfnSwV/
[14:00] <Aison`> sadly there is quite some virtual stuff
[14:00] <Aison`> but this "TIMEOUT" is very new, I suddenly started a few days ago
[14:00] <Aison`> the mailserver works now several years
[14:01] <Aison`> maybe it is somehow related to systemd-resolved?
[14:05] <ahasenack> I'd suspect an ipv6 dns resolution
[14:05] <ahasenack> I see the same with sudo on many ubuntu boxes
[14:05] <ahasenack> https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1765477
[14:06] <ahasenack> I started seeing it in bionic
[14:06] <sdeziel> Aison`: the reject_unknown_sender_domain and reject_unknown_recipient_domain can be responsible for those DNS resolutions
[14:07] <sdeziel> Aison`: I'd advise to switch the reject_non_fqdn_sender and reject_unknown_sender_domain in  mua_sender_restrictions. The reason being that reject_non_fqdn doesn't require a DNS resolution
[14:25] <Aison`> sdeziel, ok, going to try that later ;) but anyway, it is quite strange that it fails
[14:25] <Aison`> I mean the dns resolution timeout
[14:28] <Aison`> ahasenack, I guess here its since upgrade to focal
[14:33] <sdeziel> Aison': I never ran into this as we run our mail server with a local unbound, worked well for us
[17:05] <tomreyn> zyga-mbp: 20.10 is unreleased, there's channel #ubuntu+1 for it. someone reported problems with systemd after a recent update there yesterday, *maybe* this is related (resolver not working due to bad service management?)
[17:06] <zyga-mbp> it is
[17:06] <zyga-mbp> systemd-networkd goes down during the upgrade to 246
[17:06] <zyga-mbp> a systemctl reset-failed + restart fixes everything
[17:06] <zyga-mbp> just unfortunate, there are also bugs in systemd-logind upgrade
[17:06] <tomreyn> :-/ still seems like a topic for +1 rather
[17:06] <zyga-mbp> is +1 a channel?
[17:06] <zyga-mbp> ubuntu+1?
[17:07] <tomreyn> "there's channel #ubuntu+1 for it"
[17:07] <zyga-mbp> ha
[17:07] <tomreyn> so yes
[17:07] <zyga-mbp> joining