Juju packaging allows builds for unsupported architectures

[Nicholas Skaggs]

The current juju packaging specifies all for architecture, but juju itself only officially supports 64-bit architectures. We should update juju, to build on only supported architectures for all ppa and archive versions. We should also remove existing builds from xenial that are for unsupported architectures.

[SRU Information]

[Impact]
This change removes 32-bit builds of juju and replaces it with a debconf message instead. See https://lists.ubuntu.com/archives/ubuntu-release/2016-September/003882.html

[Verification]
First confirm a supported arch install works without issue. No prompting should occur.

Then, try the same on a 32-bit machine. All existing juju binaries and files should be removed, and you should be prompted with the debconf message about an unsupported client.

[Regression Potential]
For 32-bit users, this is removing a binary package. However, beta15 package of juju2 isn't supported. For the supported arches, the only regression potential is seeing a needless debconf message.

[Curtis Hovey (sinzui)]

This is fixed in he base juju-core2 branch. It only builds 64-bit versions.

[Brian Murray (brian-murray)]

Hello Nicholas, or anyone else affected,

Accepted juju-core into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/juju-core/2.0.0-0ubuntu0.16.04.2 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!

[Nicholas Skaggs (nskaggs)]

Installing xenial build, I am no longer prompted on supported architectures.

[Nicholas Skaggs (nskaggs)]

Just adding a comment to note that indeed on 32-bit arches both the install and upgrade show the DEBCONF message and remove all associated binaries.

[Launchpad Janitor (janitor)]

This bug was fixed in the package juju-core - 2.0.0-0ubuntu0.16.04.2

---------------
juju-core (2.0.0-0ubuntu0.16.04.2) xenial; urgency=medium

  * DPKG_MAINTSCRIPT_ARCH doesn't work in .config, use dpkg check (LP: #1614969)

 -- Nicholas Skaggs <email address hidden> Mon, 31 Oct 2016 15:55:49 -0400

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for juju-core 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 regressions.