Public bug reported: Basic steps: lxc launch ubuntu-daily:bionic bionic-daily lxc exec bionic-daily bash sleep 10s (because of #1765173) time host -d bionic-daily.lxd # or whatever domain your containers use by default
In bionic, there is a 5s delay when requesting the AAAA record: root@wondrous-grackle:~# time host -d wondrous-grackle.lxd Trying "wondrous-grackle.lxd" ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50934 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;wondrous-grackle.lxd. IN A ;; ANSWER SECTION: wondrous-grackle.lxd. 0 IN A 10.0.100.125 Received 54 bytes from 127.0.0.53#53 in 0 ms Trying "wondrous-grackle.lxd" (5s delay here) ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17153 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;wondrous-grackle.lxd. IN AAAA Received 38 bytes from 127.0.0.53#53 in 1 ms Trying "wondrous-grackle.lxd" ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12145 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;wondrous-grackle.lxd. IN MX Received 38 bytes from 127.0.0.53#53 in 0 ms real 0m5.023s In artful and xenial, there is no such delay and the (correct) empty reply is almost instantaneous. See https://pastebin.ubuntu.com/p/KP5DBcKyJr/ In both cases, /etc/resolv.conf points at 127.0.0.53 systemd version: *** 237-3ubuntu8 500 500 http://br.archive.ubuntu.com/ubuntu bionic/main amd64 Packages ** Affects: systemd (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1765477 Title: 5s delay in AAAA dns resolving; artful and earlier is quick Status in systemd package in Ubuntu: New Bug description: Basic steps: lxc launch ubuntu-daily:bionic bionic-daily lxc exec bionic-daily bash sleep 10s (because of #1765173) time host -d bionic-daily.lxd # or whatever domain your containers use by default In bionic, there is a 5s delay when requesting the AAAA record: root@wondrous-grackle:~# time host -d wondrous-grackle.lxd Trying "wondrous-grackle.lxd" ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50934 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;wondrous-grackle.lxd. IN A ;; ANSWER SECTION: wondrous-grackle.lxd. 0 IN A 10.0.100.125 Received 54 bytes from 127.0.0.53#53 in 0 ms Trying "wondrous-grackle.lxd" (5s delay here) ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17153 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;wondrous-grackle.lxd. IN AAAA Received 38 bytes from 127.0.0.53#53 in 1 ms Trying "wondrous-grackle.lxd" ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12145 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;wondrous-grackle.lxd. IN MX Received 38 bytes from 127.0.0.53#53 in 0 ms real 0m5.023s In artful and xenial, there is no such delay and the (correct) empty reply is almost instantaneous. See https://pastebin.ubuntu.com/p/KP5DBcKyJr/ In both cases, /etc/resolv.conf points at 127.0.0.53 systemd version: *** 237-3ubuntu8 500 500 http://br.archive.ubuntu.com/ubuntu bionic/main amd64 Packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1765477/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
