systemd-resolved and snaps

Kyle Fazzari kyle.fazzari at
Mon Mar 20 15:53:21 UTC 2017

On 02/23/2017 02:26 PM, Steve Langasek wrote:
> Hi Kyle,
> On Thu, Feb 23, 2017 at 01:58:07PM -0800, Kyle Fazzari wrote:
>> Hey all.
>> I've received a bug report on a snap where the user was running a 16.10
>> Server install with the snap in question, and getting DNS errors. I've
>> distilled the problem as much as I can but I cannot for the life of me
>> figure out what's happening, so I thought maybe the list could point me
>> in the right direction.
>> Prerequisites
>> =============
>> I have a demo snap (a standalone snapcraft.yaml) that will demonstrate
>> this issue[1].
>> Ubuntu 16.10 Server uses systemd-resolved, which means its
>> /etc/resolv.conf contains a single nameserver:
>>     nameserver
>> If you have others there, comment them out for the time being.
>> Steps to reproduce
>> ==================
>> 1. Build and install the `resolved-test` snap[1]. It exposes two apps,
>> `test` (which is a python2 script uses the requests lib) and `host`
>> which is just the `host` utility from bind9-host.
>> 2. With as the only nameserver, run `resolved-test.test`.
>> Note that it fails with "Name or service not known."
> is a CNAME.  You are hitting bug #1647031,
> which we encountered when trying to roll out systemd-resolved by default for
> 17.04.  This took a while to work through, but the fix has finally landed in
> zesty as of a week ago; we should now SRU the upstream change back to
> yakkety.  (We should also SRU it back to xenial, but xenial needs a more
> complete backport of fixes to resolved, not just a cherry-pick of this one
> fix.)
> Dimitri, could you handle this backport to yakkety?  Since unlike the
> Desktop, Ubuntu Server does not use dnsmasq by default (which would override
> resolved), this is a rather important bug there.

Hey guys, this still seems to be an issue for Yakkety. Any idea of the
timeframe we're looking at for this SRU?

Kyle Fazzari (kyrofa)
Software Engineer
Canonical Ltd.
kyle at

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