*** This bug is a duplicate of bug 1739672 ***
https://bugs.launchpad.net/bugs/1739672
** This bug has been marked a duplicate of bug 1739672
Regression in getaddrinfo(): calls block for much longer on Bionic (compared
to Xenial), please disable LLMNR
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This looks like the same as the just-diagnosed
https://launchpad.net/bugs/1739672
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https://bugs.launchpad.net/bugs/1730744
Title:
sudo is slow (10 seconds) w
Output of recreate script:
$ /tmp/lp-1730744-reproduce-lxc
=== launch container testme50 ===
Creating testme50
Starting testme50
=== wait for boot ===
.1 degraded 7.00
=== set hostname to bogus value: testme50-foo ===
=== show slow sudo ===
sudo: unable to resolve h
** Attachment added: "script with full reproduce."
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1730744/+attachment/5005923/+files/lp-1730744-reproduce-lxc
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I do wonder if we need libnss-myhostname to be installed. I hoped that
with the stub resolver, we do not. But it depends if the hostname change
made it into resolved state or not.
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What does systemd-resolve --status show in this scenario?
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https://bugs.launchpad.net/bugs/1730744
Title:
sudo is slow (10 seconds) when hostname is not reso
Somewhat interestingly, I'm not sure why I can't just reproduce this by:
$ sudo bash -c 'oname=$(hostname);
trap "hostname $oname" EXIT;
hostname my-bogus-hostname;
hostname;
time sudo /bin/true;' ; hostname
but it doesnt reproduce this way.
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This is more easily recreated with lxc.
Given a host with systemd-resolv:
$ lxc launch ubuntu-daily:xenial x1
$ sleep 10 # let it boot
$ lxc exec x1 -- grep '^[^#]' /etc/resolv.conf
nameserver 10.75.205.1
search lxd
$ lxc exec x1 -- hostname bogus-host
$ lxc exec x1 -- bash -c 'time sudo /bin/tr
Here is some information collected when I tried to debug.
Using resolved on host =
## guest
$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 10.0.2.3
sea
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