A Juju charm config dictionary that can write itself to disk (as json) and track which values have changed since the previous hook invocation.

ServiceManager callback to manage starting up a Docker container. Can be referenced as `docker_start` or `docker_stop`, and performs the

Callback class that will open or close ports, for use as either a start or stop action.

Raised when an undefined hook is called

Handler for archives via generic URLs

Base class for FetchHandler implementations in fetch plugins

Handler for bazaar branches via generic and lp URLs

Class representing arguments to be passed to the Docker container.

Subclass of `dict` representing a mapping of ports from the host to the container.

Class representing a relation to another Docker container, which could be another service, or a peer within the same service.

Class representing Docker volumes.

Entry class represents a non-comment line on the `/etc/fstab` file

This class extends file in order to implement a file reader/writer for file `/etc/fstab`

A convenient handler for hook functions. Example:: hooks = Hooks() # register a hook, taking its name from the function name

Special case of a callback that takes the `ServiceManager` instance in addition to the service name. Subclasses should implement `__call

Base class for a context generator that gets relation data from juju. Subclasses must provide `interface`, which is the interface type of in

Wrapper, an object that can be serialized to yaml or json

Callback class that will render a template, for use as a ready action. The `target` param, if omitted, will default to `/etc/init/<service n