def check_agent_router_scheduling_needed(self, context, agent, router):
"""Check if the router scheduling is needed.
:raises: RouterHostedByL3Agent if router is already assigned
to a different agent.
:returns: True if scheduling is needed, otherwise False
"""
router_id = router['id']
agent_id = agent['id']
if router.get('distributed'):
if router['external_gateway_info']:
return not self.get_snat_bindings(context, router['id'])
return False
query = context.session.query(RouterL3AgentBinding)
bindings = query.filter_by(router_id=router_id).all()
if not bindings:
return True
for binding in bindings:
if binding.l3_agent_id == agent_id:
# router already bound to the agent we need
return False
# non-dvr case: centralized router is already bound to some agent
raise l3agentscheduler.RouterHostedByL3Agent(
router_id=router_id,
agent_id=bindings[0].l3_agent_id)
def add_router_to_l3_agent(self, context, id, router_id):
"""Add a l3 agent to host a router."""
router = self.get_router(context, router_id)
with context.session.begin(subtransactions=True):
agent_db = self._get_agent(context, id)
if (agent_db['agent_type'] != constants.AGENT_TYPE_L3 or
not agent_db['admin_state_up'] or
not self.get_l3_agent_candidates(router, [agent_db])):
raise l3agentscheduler.InvalidL3Agent(id=id)
query = context.session.query(RouterL3AgentBinding)
try:
binding = query.filter(
RouterL3AgentBinding.l3_agent_id == agent_db.id,
RouterL3AgentBinding.router_id == router_id).one()
if binding:
raise l3agentscheduler.RouterHostedByL3Agent(
router_id=router_id, agent_id=id)
except exc.NoResultFound:
pass
result = self.auto_schedule_routers(context,
agent_db.host,
[router_id])
if not result:
raise l3agentscheduler.RouterSchedulingFailed(
router_id=router_id, agent_id=id)
l3_notifier = self.agent_notifiers.get(constants.AGENT_TYPE_L3)
if l3_notifier:
l3_notifier.router_added_to_agent(
context, [router_id], agent_db.host)
def add_router_to_l3_agent(self, context, agent_id, router_id):
"""Add a l3 agent to host a router."""
router = self.get_router(context, router_id)
distributed = router.get('distributed')
with context.session.begin(subtransactions=True):
agent_db = self._get_agent(context, agent_id)
agent_conf = self.get_configuration_dict(agent_db)
agent_mode = agent_conf.get('agent_mode', 'legacy')
if (not distributed and agent_mode == 'dvr'
or distributed and agent_mode == 'legacy'):
router_type = ('distributed' if distributed else 'centralized')
raise l3agentscheduler.RouterL3AgentMismatch(
router_type=router_type,
router_id=router_id,
agent_mode=agent_mode,
agent_id=agent_id)
if (agent_db['agent_type'] != constants.AGENT_TYPE_L3
or not agent_db['admin_state_up']
or not self.get_l3_agent_candidates(
context, router, [agent_db])):
raise l3agentscheduler.InvalidL3Agent(id=agent_id)
query = context.session.query(RouterL3AgentBinding)
if distributed:
binding = query.filter_by(router_id=router_id,
l3_agent_id=agent_id).first()
if binding:
raise l3agentscheduler.RouterHostedByL3Agent(
router_id=router_id, agent_id=binding.l3_agent_id)
else:
try:
binding = query.filter_by(router_id=router_id).one()
raise l3agentscheduler.RouterHostedByL3Agent(
router_id=router_id, agent_id=binding.l3_agent_id)
except exc.NoResultFound:
pass
result = self.auto_schedule_routers(context, agent_db.host,
[router_id])
if not result:
raise l3agentscheduler.RouterSchedulingFailed(
router_id=router_id, agent_id=agent_id)
l3_notifier = self.agent_notifiers.get(constants.AGENT_TYPE_L3)
if l3_notifier:
l3_notifier.router_added_to_agent(context, [router_id],
agent_db.host)
def check_agent_router_scheduling_needed(self, context, agent, router):
"""Check if the router scheduling is needed.
:raises: RouterHostedByL3Agent if router is already assigned
to a different agent.
:returns: True if scheduling is needed, otherwise False
"""
router_id = router['id']
agent_id = agent['id']
bindings = rb_obj.RouterL3AgentBinding.get_objects(context,
router_id=router_id)
if not bindings:
return True
for binding in bindings:
if binding.l3_agent_id == agent_id:
# router already bound to the agent we need
return False
if router.get('ha'):
return True
# legacy router case: router is already bound to some agent
raise l3agentscheduler.RouterHostedByL3Agent(
router_id=router_id, agent_id=bindings[0].l3_agent_id)
