On Fr, 26.03.21 19:50, Zbigniew Jędrzejewski-Szmek (zbyszek@xxxxxxxxx) wrote: > On Fri, Mar 26, 2021 at 01:27:46PM -0600, Chris Murphy wrote: > > I'm using the copr build in f34. It seems to be working but the ipv6 > > ipv4 flip on successive runs as if there's some kind of race in > > reporting one or the other first? Is that relevant? > > That's a feature! > > https://github.com/systemd/systemd/commit/3f0a7b3a32: > > resolved: randomize RR order in answers each time we get something from the cache > > This allows some minimal, crappy load balancing. > Fixes: #16297 Actually, it's more complex than that. The randomization only takes place for addresses of the same family. i.e. we'll randomize the order of A RRs among themselves (i.e of IPv4 addresses), and among AAAA RRs among themselves (i.e. of IPv6 addresses), but we will not mix A and AAAA RRs. What you are seeing simply has to do with the order the replies came in. i.e. when you do not specify the protocol that shall be used two requests will be sent to your DNS server, typically via UDP: one for A RRs and another one for AAAA RRs. Depending on the order they replies come back you'll see the addresses in one or the other order. We probably should add some fixed ordering between the address families though, so that what is returned here is independent of the order of replies we get. Lennart -- Lennart Poettering, Berlin _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
