Source code for juju.placement

# This module allows us to parse a machine placement directive into a
# Placement object suitable for passing through the websocket API.
# Once is addressed, this
# module should be deprecated.

from .client import client


[docs]def parse(directive): """ Given a string in the format `scope:directive`, or simply `scope` or `directive`, return a Placement object suitable for passing back over the websocket API. """ if not directive: # Handle null case return None if isinstance(directive, (list, tuple)): results = [] for d in directive: results.extend(parse(d)) return results if isinstance(directive, (dict, client.Placement)): # We've been handed something that we can simply hand back to # the api. (Forwards compatibility) return [directive] # Juju 2.0 can't handle lxc containers. directive = directive.replace('lxc', 'lxd') if ":" in directive: # Planner has given us a scope and directive in string form scope, directive = directive.split(":") return [client.Placement(scope=scope, directive=directive)] if directive.isdigit(): # Planner has given us a machine id (we rely on juju core to # verify its validity.) return [client.Placement(scope=MACHINE_SCOPE, directive=directive)] if "/" in directive: # e.g. "0/lxd/0" # return [ client.Placement(scope=MACHINE_SCOPE, directive=directive), ] # Planner has probably given us a container type. Leave it up to # juju core to verify that it is valid. return [client.Placement(scope=directive)]