The watcher.decision_engine.model.model_root Module

class watcher.decision_engine.model.model_root.ModelRoot(stale=False)

Bases: object

add_instance(instance)

add_node(node)

assert_instance(obj)

assert_node(obj)

create_resource(r)

delete_instance(instance, node=None)

classmethod from_xml(data)

get_all_compute_nodes()

get_all_instances()

get_instance_by_uuid(uuid)

get_mapping()

get_node_by_instance_uuid(instance_uuid)

Getting host information from the guest instance

Parameters:instance_uuid – the uuid of the instance Returns:node

get_node_by_uuid(node_uuid)

get_node_instances(node)

get_resource_by_uuid(resource_id)

map_instance(instance, node)

Map a newly created instance to a node

Parameters:

• instance (str or Instance) – Instance object or instance UUID
• node (str or Instance) – ComputeNode object or node UUID

migrate_instance(instance, source_node, destination_node)

Migrate single instance from source_node to destination_node

Parameters:

• instance –
• source_node –
• destination_node –

Returns:

remove_instance(instance)

remove_node(node)

to_string()

unmap_instance(instance, node)

Unmap an instance from a node

Parameters:

• instance (str or Instance) – Instance object or instance UUID
• node (str or Instance) – ComputeNode object or node UUID