/etc/dnsmasq.d-available/lxc circular link

I'm looking into this.

I've not been able to reproduce this issue and it's unclear whether it'd still affect new users or was only a temporary glitch while we were fixing the dnsmasq config handling.

I'm marking this incomplete for now in the hope that someone can produce a step by step procedure to trigger this.

I'm not sure exactly how to reproduce this, but I've got the same error message while doing an apt-get dist-upgrade on raring ~ 5 minutes ago.

Thanks for the info, Kevin.

 status: confirmed
 importance: high

Ok, I'll try to get to the bottom of this today.

Alright, I figured it out and wrote a patch for it.
Now here's the boring explanation for all that mess.

We introduced the dnsmasq hook in LXC in quantal, then fixed it to use dpkg-maintscripts as an SRU.
We then subsequently SRUed the whole thing to precise and we pushed the new version to raring.

That means in short that the migration code needs to fire if the previous version is:
 - < "0.7.5-3ubuntu67" on precise
 - < "0.8.0~rc1-4ubuntu39.12.10.2" on quantal
 - < "0.8.0~rc1-4ubuntu49" on raring

This means we can't do the obvious thing of putting "0.7.5-3ubuntu67" in lxc.maintscripts as someone can have a machine with the base quantal version, then upgrade to raring and not get the migration done. Similar thing can happen with someone upgrading from an early raring image.

As a result, I think it's best to have the base version for each series set in lxc.maintscripts as one would expect if it wasn't for the mess we created with all the SRUs and then have some extra logic in the postinst to detect the mess created by multiple migrations and fix it all up for the user.

I'm attaching the suggested patch for this issue, which I tested in a standard fully-up-to-date-quantal to current-raring update scenario.

Alright, assigned the various tasks to the usual suspects. I'm doing one last series of test on LXC and I'll upload the LXC fix.

This bug was fixed in the package lxc - 0.9.0~rc1-0ubuntu3

---------------
lxc (0.9.0~rc1-0ubuntu3) raring; urgency=low

  * Add code to postinst to fix any double-migration of /etc/dnsmasq.
    (LP: #1157332)
 -- Stephane Graber <email address hidden> Wed, 27 Mar 2013 16:51:11 -0400

This bug was fixed in the package libvirt - 1.0.2-0ubuntu10

---------------
libvirt (1.0.2-0ubuntu10) raring; urgency=low

  * Add code to postinst to fix any double-migration of /etc/dnsmasq.
    (LP: #1157332)
 -- Serge Hallyn <email address hidden> Thu, 28 Mar 2013 09:11:04 -0500

Hello Seth, or anyone else affected,

Accepted libvirt into quantal-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/libvirt/0.9.13-0ubuntu12.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

I tested libvirt-bin on quantal: the current archive version does not properly re-create /etc/dnsmasq.d/libvirt-bin symbolic link when installed, uninstalled, and re-installed.

The -proposed version does properly re-create the /etc/dnsmasq.d/libvirt-bin symbolic link.

(Ignore the verification-done -> -needed -> -done toggling; I mis-read my terminal's scrollback when transcribing details here.)

Hello Seth, or anyone else affected,

Accepted lxc into quantal-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/lxc/0.8.0~rc1-4ubuntu39.12.10.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

This bug was fixed in the package libvirt - 0.9.13-0ubuntu12.3

---------------
libvirt (0.9.13-0ubuntu12.3) quantal-proposed; urgency=low

  * put libvirt-bin dnsmasq file into /etc/dnsmasq.d-available, and
    create a symlink in /etc/dnsmasq.d, to avoid problems when removing
    and re-installing libvirt-bin. (LP: #1113821)
  * Add code to postinst to fix any double-migration of /etc/dnsmasq.
    (LP: #1157332)
  * debian/libvirt-bin.{dirs,install}: install dnsmasq.d-available/libvirt-bin
 -- Serge Hallyn <email address hidden> Tue, 16 Apr 2013 07:11:17 -0500

I've just installed lxc (0.8.0~rc1-4ubuntu39.12.10.2~ubuntu12.04.1) from precise-backports and got the same circular link warning. Will the package in backports get fixed?

We are looking into backporting 1.0.0~alpha1 to precise-backports which will contain the needed fix.

quantal package looks good.

This bug was fixed in the package lxc - 0.8.0~rc1-4ubuntu39.12.10.3

---------------
lxc (0.8.0~rc1-4ubuntu39.12.10.3) quantal-proposed; urgency=low

  * Add code to postinst to fix any double-migration of /etc/dnsmasq.
    (LP: #1157332)
 -- Stephane Graber <email address hidden> Wed, 27 Mar 2013 16:55:17 -0400

The verification of this Stable Release Update has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regresssions.

quantal has seen the end of its life and is no longer receiving any updates. Marking the quantal task for this ticket as "Won't Fix".

raring has seen the end of its life and is no longer receiving any updates. Marking the raring task for this ticket as "Won't Fix".

We're dropping dnsmasq from default, marking as Won't Fix in network-manager.