def _notify_agents_router_rescheduled(self, context, router_id, old_agents,
new_agents):
l3_notifier = self.agent_notifiers.get(constants.AGENT_TYPE_L3)
if not l3_notifier:
return
old_hosts = [agent['host'] for agent in old_agents]
new_hosts = [agent['host'] for agent in new_agents]
for host in set(old_hosts) - set(new_hosts):
l3_notifier.router_removed_from_agent(context, router_id, host)
for agent in new_agents:
# Need to make sure agents are notified or unschedule otherwise
for attempt in range(AGENT_NOTIFY_MAX_ATTEMPTS):
try:
l3_notifier.router_added_to_agent(context, [router_id],
agent['host'])
break
except oslo_messaging.MessagingException:
LOG.warning(
_LW('Failed to notify L3 agent on host '
'%(host)s about added router. Attempt '
'%(attempt)d out of %(max_attempts)d'), {
'host': agent['host'],
'attempt': attempt + 1,
'max_attempts': AGENT_NOTIFY_MAX_ATTEMPTS
})
else:
self._unbind_router(context, router_id, agent['id'])
raise l3agentscheduler.RouterReschedulingFailed(
router_id=router_id)
def reschedule_router(self, context, router_id, candidates=None):
"""Reschedule router to a new l3 agent
Remove the router from the agent(s) currently hosting it and
schedule it again
"""
cur_agents = self.list_l3_agents_hosting_router(context,
router_id)['agents']
with context.session.begin(subtransactions=True):
for agent in cur_agents:
self._unbind_router(context, router_id, agent['id'])
new_agent = self.schedule_router(context,
router_id,
candidates=candidates)
if not new_agent:
raise l3agentscheduler.RouterReschedulingFailed(
router_id=router_id)
l3_notifier = self.agent_notifiers.get(constants.AGENT_TYPE_L3)
if l3_notifier:
for agent in cur_agents:
l3_notifier.router_removed_from_agent(context, router_id,
agent['host'])
l3_notifier.router_added_to_agent(context, [router_id],
new_agent.host)
def reschedule_router(self, context, router_id, candidates=None):
"""Reschedule router to new l3 agents
Remove the router from l3 agents currently hosting it and
schedule it again
"""
router = self.get_router(context, router_id)
is_distributed = router.get('distributed', False)
if not is_distributed:
return super(L3_DVRsch_db_mixin,
self).reschedule_router(context, router_id,
candidates)
old_agents = self.list_l3_agents_hosting_router(context,
router_id)['agents']
with context.session.begin(subtransactions=True):
for agent in old_agents:
self._unbind_router(context, router_id, agent['id'])
self.unbind_snat_servicenode(context, router_id)
self.schedule_router(context, router_id, candidates=candidates)
new_agents = self.list_l3_agents_hosting_router(
context, router_id)['agents']
if not new_agents:
raise l3agentscheduler.RouterReschedulingFailed(
router_id=router_id)
l3_notifier = self.agent_notifiers.get(q_const.AGENT_TYPE_L3)
if l3_notifier:
old_hosts = [agent['host'] for agent in old_agents]
new_hosts = [agent['host'] for agent in new_agents]
for host in set(old_hosts) - set(new_hosts):
l3_notifier.router_removed_from_agent(context, router_id, host)
for host in new_hosts:
l3_notifier.router_added_to_agent(context, [router_id], host)
def _notify_agents_router_rescheduled(self, context, router_id, old_agents,
new_agents):
l3_notifier = self.agent_notifiers.get(constants.AGENT_TYPE_L3)
if not l3_notifier:
return
old_hosts = [agent['host'] for agent in old_agents]
new_hosts = [agent['host'] for agent in new_agents]
router = self.get_router(context, router_id)
for host in set(old_hosts) - set(new_hosts):
retain_router = self._check_router_retain_needed(
context, router, host)
if retain_router:
l3_notifier.routers_updated_on_host(context, [router_id], host)
else:
l3_notifier.router_removed_from_agent(context, router_id, host)
for agent in new_agents:
try:
l3_notifier.router_added_to_agent(context, [router_id],
agent['host'])
except oslo_messaging.MessagingException:
self._unbind_router(context, router_id, agent['id'])
raise l3agentscheduler.RouterReschedulingFailed(
router_id=router_id)
def reschedule_router(self, context, router_id, candidates=None):
"""Reschedule router to (a) new l3 agent(s)
Remove the router from the agent(s) currently hosting it and
schedule it again
"""
cur_agents = self.list_l3_agents_hosting_router(context,
router_id)['agents']
with context.session.begin(subtransactions=True):
cur_agents_ids = [agent['id'] for agent in cur_agents]
self._unschedule_router(context, router_id, cur_agents_ids)
self.schedule_router(context, router_id, candidates=candidates)
new_agents = self.list_l3_agents_hosting_router(
context, router_id)['agents']
if not new_agents:
raise l3agentscheduler.RouterReschedulingFailed(
router_id=router_id)
self._notify_agents_router_rescheduled(context, router_id, cur_agents,
new_agents)
def reschedule_router(self, context, router_id, candidates=None):
"""Reschedule router to (a) new l3 agent(s)
Remove the router from the agent(s) currently hosting it and
schedule it again
"""
cur_agents = self.list_l3_agents_hosting_router(context,
router_id)['agents']
with db_api.CONTEXT_WRITER.using(context):
cur_agents_ids = [agent['id'] for agent in cur_agents]
self._unschedule_router(context, router_id, cur_agents_ids)
self.schedule_router(context, router_id, candidates=candidates)
new_agents = self.list_l3_agents_hosting_router(
context, router_id)['agents']
if not new_agents:
raise l3agentscheduler.RouterReschedulingFailed(
router_id=router_id)
self._notify_agents_router_rescheduled(context, router_id, cur_agents,
new_agents)
