Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: systemd (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1765477
Title:
5s delay in AAAA dns resolving; artful and earlier is quick
Status in systemd package in Ubuntu:
Confirmed
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
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