How do I deploy a specific revision of a charm?
Solution 1:
First off, you need to find out which revision you need. The revision of the charm is completely different from the bzr revision. So for https://jujucharms.com/precise/mongodb/
So the charm revision is 26. Now let's say you think something broke in 26, and you want to try version 25 or earlier.
juju deploy cs:mongodb-25
will give you that revision of the charm. However it is always a good idea to be explicit about the series as well to ensure repeatability:
juju deploy cs:precise/mongodb-25