Last night, spent some time with latest jujuc-core in saucy, was interested with local provider support which was added recently. Couple of things worth to be known:
1 juju-core now use mongodb to replace zookeeper, so to play with local provider, you need install lxc, mongodb. I have whishlist against juju-core packaging for providing a meta package to install those dependencies.
2 After install mongodb, do remember to stop the server manually, because juju bootstrap will create its own upstart scripts to handle start/stop the service.
3 The configuration of local provider is quite simple now, you may copy and paste the one by running juju init, not need modify anything, I did comment out root-dir, which made me run into .
4 Two commands need to be run with sudo, one is bootstrap, the other is destroy-environment.