[Bug 1031065] Re: /sbin/resolvconf -a depends on /run/resolvconf/interface but it may not exist
Stéphane Graber
stgraber at stgraber.org
Mon Jul 30 22:19:23 UTC 2012
Problem was tracked down to cloud-init calling "start networking"
directly from one of its upstart jobs, which bypasses the start
condition of the networking job and triggers the bug.
21:16 < stgraber> [ 4.598897] networking
21:16 < stgraber> [ 5.016864] init: cloud-init-nonet main process (241) killed by TERM signal
21:16 < stgraber> [ 5.632677] resolvconf
21:16 < stgraber> [ 5.955406] virtual
21:16 < stgraber> [ 5.989643] local
21:17 < stgraber> ubuntu at ip-10-202-249-151:~$ grep -r 'start networking' /etc/init/
21:17 < stgraber> /etc/init/cloud-init-nonet.conf: start networking >/dev/null
21:17 < stgraber> smoser: ^
21:18 < stgraber> "start on mounted MOUNTPOINT=/ and stopped cloud-init-local" with clout-init-local being "start on mounted MOUNTPOINT=/"
21:18 < stgraber> so basically as soon as / is mounted, "start networking" is directly triggered by cloud-init-nonet bypassing the start condition
http://paste.ubuntu.com/1120257/ shows the process tree at the time.
** Package changed: resolvconf (Ubuntu) => cloud-init (Ubuntu)
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https://bugs.launchpad.net/bugs/1031065
Title:
/sbin/resolvconf -a depends on /run/resolvconf/interface but it may
not exist
Status in “cloud-init” package in Ubuntu:
New
Bug description:
In development of 'overlayroot' package, I was mounting / as rw in the initramfs.
This was causing a different order of execution of mounts, and as a result a different order of networking resolvconf and networking bringup.
It exposed a bug in resolvconf, which was being called on boot in this order:
==== Mon Jul 30 19:08:58 UTC 2012 /sbin/resolvconf -a lo.inet ====
==== Mon Jul 30 19:08:59 UTC 2012 /sbin/dhclient-script ====
==== Mon Jul 30 19:08:59 UTC 2012 /sbin/resolvconf -a eth0.dhclient ====
==== Mon Jul 30 19:08:59 UTC 2012 /sbin/resolvconf -a eth0.inet ====
==== Mon Jul 30 19:08:59 UTC 2012 /sbin/resolvconf --enable-updates ====
==== Mon Jul 30 19:08:59 UTC 2012 /etc/resolvconf/update.d/libc -u ====
The normal order is for resolvconf --enable-updates to be called (from /etc/init/resolvconf.conf) before anything else. As a result, I was seeing errors like:
resolvconf: Error: /run/resolvconf/interface either does not exist or is not a directory
This may be exposing a more grave issue, in that I believe the reason
for dhclient coming up before resolvconf.conf started was that it was
being run as a result of /etc/init/network-interface.conf. I don't
immediately see how that is guarnateed to have /run ounted at all.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: resolvconf 1.67ubuntu1
ProcVersionSignature: User Name 3.5.0-6.6-generic 3.5.0
Uname: Linux 3.5.0-6-generic x86_64
Architecture: amd64
Date: Mon Jul 30 20:07:04 2012
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: resolvconf
UpgradeStatus: No upgrade log present (probably fresh install)
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