This is the base layer for all charms built using layers. It provides all of the standard hooks, such as install, config-changed, upgrade-charm, etc. and runs the charms.reactive.main loop for them. It also bootstraps the charm-helpers and charms.reactive libraries and all of their dependencies for use by the charm.

To create a charm layer using this base layer, you need only include it in a layer.yaml file:

includes: ['layer:basic']

This will fetch this layer from interfaces.juju.solutions and incorporate it into your charm layer. You can then add handlers under the reactive/ directory. Note that any file under reactive/ will be expected to contain handlers, whether as Python decorated functions or executables using the external handler protocol.

You can also define Python libraries under lib/charms/X where X is a package under the charms. namespace for your charm. See PyPI for what packages already exist under the charms. namespace.

This layer does not currently support any configuration.

This layer currently does not set any reactive states.

This layer currently does not define any actions.