Merge lp://staging/~fginther/adt-cloud-worker/uci-nova-mirror into lp://staging/~canonical-ci-engineering/adt-cloud-worker/uci-nova

Francis,

Thanks for implementing this feature. I agree it's required to be optional because it depends on the environment it's operating, i.e. the same repository used for triggering britney analysis.

Although it seems entirely unfortunate that instead of dealing with possible/transient inconsistencies (needs to test version X, but it's not available, will retry later) the adt-jenkins system relies on external arrangements to make sure it never happens (internal mirrors, apt-caches, extra load on ftpmaster, etc).

I think we can do a lot better, if we start requesting and monitoring tests in adt-cloud direct from britney (I don't mean direct amqp access as uci-britney, but instead the synchronous rest api we already have).

That said, let's see how the uci-nova workaround performs in production.

Celso,

I fully agree. During the Austin sprint, cjwatson and jibel mentioned that there is an alternate means to ensure that a testbed has the correct version of the archive by comparing timestamps. But there is additional work in other parts of the proposed-migration process to make this functional. I believing 'fixing' that problem is outside the scope of what we need to accomplish for this story. But it should be part of a more thorough update when the time comes.