lxc deploys broken on precise

[Curtis Hovey]

stable (1.20) and devel (master) are broken by a commit that changes lxc. Only precise is affected. trusty and utopic are fine. I don't believe architecture is a factor

The essential error seen in the logs are
    machine-0: 2014-07-29 18:29:00 ERROR juju.container.lxc lxc.go:244 container failed to start: cannot determine the lxc-start version: exit status 1
    machine-0: 2014-07-29 18:29:00 ERROR juju.provisioner provisioner_task.go:420 cannot start instance for machine "1": cannot determine the lxc-start version: exit status 1

Once this error is experienced, juju doesn't not cleanup. The lxc containers are left stopped with confs in /etc/lxc/auto. The machine must be manually purged.

[Curtis Hovey (sinzui)]

The breaking commits were changes to the packagins deps

1.20 5a5d19485962fbf344731ff1b0896fe96ad540ce Merge pull request #410 from katco-/upstream-1.20
master b76ac1d485abeeb7cb056503282648be8c9b796b Merge pull request #418 from katco-/update-golxc-version

the actual issue is in golxc revno 11

[Curtis Hovey (sinzui)]

The precise machine
~$ apt-cache policy lxc
lxc:
  Installed: 1.0.0~alpha1-0ubuntu14.1~ubuntu12.04.1~juju1

The trusty machine that passed has
    1.0.4-0ubuntu0.1

[Curtis Hovey (sinzui)]

See http://juju-ci.vapour.ws:8080/job/local-deploy-precise-amd64/ for specific details
    1.20 http://juju-ci.vapour.ws:8080/job/local-deploy-precise-amd64/1709/console
    master http://juju-ci.vapour.ws:8080/job/local-deploy-precise-amd64/1714/console

Since the first failure will leave broken containers subsequent retests will report the containers already exist. So besides this bug, it is clear juju is leaving a broken system behind.

[Katherine Cox-Buday (cox-katherine-e)]

The golxc library attempts to look at the --version flag to intelligently determine what flag to use to specify a console-file. It looks like in this particular version of lxc-start there is no --version flag. We will have to reconsider how to determine what the console-file flag is.