ironic.conductor.base_manager module

Base conductor manager functionality.

class ironic.conductor.base_manager.BaseConductorManager(host, topic)

Bases: object

del_host(deregister=True, clear_node_reservations=True)

get_online_conductor_count()

Return a count of currently online conductors

has_reserved()

Determines if this host currently has any reserved nodes

Returns:

True if this host has reserved nodes

init_host(admin_context=None, start_consoles=True, start_allocations=True)

Initialize the conductor host.

Parameters:

• admin_context – the admin context to pass to periodic tasks.

• start_consoles – If consoles should be started in initialization.

• start_allocations – If allocations should be started in initialization.

Raises:

RuntimeError when conductor is already running.

Raises:

NoDriversLoaded when no drivers are enabled on the conductor.

Raises:

DriverNotFound if a driver is enabled that does not exist.

Raises:

DriverLoadError if an enabled driver cannot be loaded.

Raises:

DriverNameConflict if a classic driver and a dynamic driver are both enabled and have the same name.

Raises:

IncorrectConfiguration if invalid configuration has been set which cannot permit proper operation.

iter_nodes(fields=None, **kwargs)

Iterate over nodes mapped to this conductor.

Requests node set from and filters out nodes that are not mapped to this conductor.

Yields tuples (node_uuid, driver, conductor_group, …) where … is derived from fields argument, e.g.: fields=None means yielding (‘uuid’, ‘driver’, ‘conductor_group’), fields=[‘foo’] means yielding (‘uuid’, ‘driver’, ‘conductor_group’, ‘foo’).

Parameters:

• fields – list of fields to fetch in addition to uuid, driver, and conductor_group

• kwargs – additional arguments to pass to dbapi when looking for nodes

Returns:

generator yielding tuples of requested fields

keepalive_halt()

prepare_host()

Prepares host for initialization

Prepares the conductor for basic operation by removing any existing transitory node power states and reservations which were previously held by this host.

Under normal operation, this is also when the initial database connectivity is established for the conductor’s normal operation.

ironic.conductor.base_manager.reject_when_reached(pool_size)

Return a function to reject new work for Ironic.

Parameters:

pool_size – The maximum number of items in the execution pool.

Returns:

A function which is executed by futurist when attempting to determine if work should be deleted, or not.