def _get_scheduled_drivers(self, context, instance, action):
nodes = self._get_instance_nodes(context, instance)
result = {}
func = getattr(self.driver_manager, 'schedule_' + action)
for node in nodes:
node_context = ctx.get_node_driver_context(self, context, instance,
node)
driver = func(node_context)
if not driver:
raise exc.NoDriverAvailableForAction(action=action,
node_id=node['id'])
result[node['id']] = {}
result[node['id']]['driver'] = driver
result[node['id']]['context'] = node_context
result[node['id']]['plumbing_info'] = driver.get_plumbing_info(
node_context)
return result
def update_servicechain_node(self, context, servicechain_node_id,
servicechain_node):
"""Node Update.
When a Servicechain Node is updated, all the corresponding instances
need to be updated as well. This usually results in a node
reconfiguration.
"""
session = context.session
updaters = {}
with session.begin(subtransactions=True):
original_sc_node = self.get_servicechain_node(
context, servicechain_node_id)
updated_sc_node = super(NodeCompositionPlugin,
self).update_servicechain_node(
context, servicechain_node_id,
servicechain_node)
self._validate_shared_update(context, original_sc_node,
updated_sc_node, 'servicechain_node')
instances = self._get_node_instances(context, updated_sc_node)
for instance in instances:
node_context = ctx.get_node_driver_context(
self, context, instance, updated_sc_node, original_sc_node)
# TODO(ivar): Validate that the node driver understands the
# update.
driver = self.driver_manager.schedule_update(node_context)
if not driver:
raise exc.NoDriverAvailableForAction(
action='update', node_id=original_sc_node['id'])
updaters[instance['id']] = {}
updaters[instance['id']]['context'] = node_context
updaters[instance['id']]['driver'] = driver
updaters[instance['id']]['plumbing_info'] = (
driver.get_plumbing_info(node_context))
# Update the nodes
for update in updaters.values():
try:
update['driver'].update(update['context'])
except exc.NodeDriverError as ex:
LOG.error(_LE("Node Update failed, %s"), ex.message)
return updated_sc_node