Ubuntu
debian-installer package

name resolution fails in-target

Bug #1717038 reported by Carl Karsten
16
This bug affects 2 people
Affects Status Importance Assigned to Milestone
base-installer (Ubuntu)
Triaged
High
Unassigned
Artful
Triaged
High
Unassigned
debian-installer (Ubuntu)
Triaged
High
Unassigned
Artful
Triaged
High
Unassigned

Bug Description

artful (beta)

Seems any time something running in-target tries to resolve a name

Sep 12 03:59:58 in-target: Err:1 http://us.archive.ubuntu.com/ubuntu artful/main amd64 libnl-3-200 amd64 3.2.29-0ubuntu3

Sep 12 03:59:58 in-target: Temporary failure resolving 'us.archive.ubuntu.com'

cat /etc/resolv.conf
search lan
nameserver 192.168.1.3

(expected)

alt-f2 to console

# ping goo.gl (works)

# in-target ping goo.gl (output goes to syslog:
 Sep 12 4:5:6 in-target: ping goo.gl Temporary failure resolving 'goo.gl'

Revision history for this message
Steve Langasek (vorlon) wrote :

What exact image (type and date) did you see this with? In my tests of the current (20170914) artful-server-amd64.iso, name resolution appears to work fine.

Changed in debian-installer (Ubuntu):
status: New → Incomplete
Revision history for this message
Steve Langasek (vorlon) wrote :

Ah. I was using 'chroot /target ping www.google.com', not 'in-target' since 'in-target' takes a lock and doesn't allow you to run it while other commands are installing.

If I wait until the target setup has finished and then run 'in-target ping www.google.com', I also see this name resolution failure.

It turns out that 'in-target' mounts a tmpfs on /run each time that it's called, and unmounts it when it's done. But the stub resolv.conf target is in the /run directory on the target filesystem, *not* on the tmpfs.

To fix this, we need:
 - /run to be mounted before packages start writing to it
 - /run to persist for the duration of the install process, so that files like /run/systemd/resolve/stub-resolv.conf don't disappear after they've been set up.

Changed in debian-installer (Ubuntu):
importance: Undecided → High
status: Incomplete → Triaged
Steve Langasek (vorlon)
Changed in base-installer (Ubuntu):
status: New → Triaged
importance: Undecided → High
Francis Ginther (fginther)
tags: added: id-59bb66b5c974df303d243493
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