The nova.scheduler.driver Module

Scheduler base class that all Schedulers should inherit from

class Scheduler

Bases: object

The base class that all Scheduler classes should inherit from.

hosts_up(context, topic)

Return the list of hosts that have a running service for topic.

run_periodic_tasks(context)

Manager calls this so drivers can perform periodic tasks.

select_destinations(context, request_spec, filter_properties)

Must override select_destinations method.

Returns:A list of dicts with ‘host’, ‘nodename’ and ‘limits’ as keys that satisfies the request_spec and filter_properties.