def maintain():
"""
For each API type, maintain a desired capacity calculated based on number of outstanding requests.
"""
APIContainer.log_info("Starting container maintenance...")
APIContainer.refresh_container_list()
APIContainer.release_queues()
APIContainer.calc_desired_container_counts()
def cleanup(msg):
if 'nid' in msg:
cont = APIContainer.get_by_name(msg['nid'])
cont.delete()
for (api_name, clist) in APIContainer.API_CONTAINERS.iteritems():
ndiff = len(clist) - APIContainer.DESIRED_CONTAINER_COUNTS[api_name]
# terminate if in excess
while ndiff > 0:
APIContainer.log_debug("terminating one instance of %s", api_name)
APIConnector.send_terminate_msg(api_name, on_recv=cleanup)
ndiff -= 1
# launch if more required
while ndiff < 0:
APIContainer.log_debug("launching one instance of %s", api_name)
APIContainer.create_new(api_name)
ndiff += 1
APIContainer.log_info("Finished container maintenance.")
def maintain():
"""
For each API type, maintain a desired capacity calculated based on number of outstanding requests.
"""
APIContainer.log_info("Starting container maintenance...")
APIContainer.refresh_container_list()
APIContainer.release_queues()
APIContainer.calc_desired_container_counts()
def cleanup(msg):
if 'nid' in msg:
cont = APIContainer.get_by_name(msg['nid'])
cont.delete()
for (api_name, clist) in APIContainer.API_CONTAINERS.iteritems():
ndiff = len(
clist) - APIContainer.DESIRED_CONTAINER_COUNTS[api_name]
# terminate if in excess
while ndiff > 0:
APIContainer.log_debug("terminating one instance of %s",
api_name)
APIConnector.send_terminate_msg(api_name, on_recv=cleanup)
ndiff -= 1
# launch if more required
while ndiff < 0:
APIContainer.log_debug("launching one instance of %s",
api_name)
APIContainer.create_new(api_name)
ndiff += 1
APIContainer.log_info("Finished container maintenance.")
def release_queues():
APIContainer.log_debug("active apis: %r", APIContainer.API_CONTAINERS)
for api_name in APIQueue.QUEUES.keys():
APIContainer.log_debug("checking queue for %s", api_name)
if api_name not in APIContainer.API_CONTAINERS:
APIConnector.release_connectors(api_name)
APIQueue.release_queue(api_name)
def release_queues():
APIContainer.log_debug("active apis: %r", APIContainer.API_CONTAINERS)
for api_name in APIQueue.QUEUES.keys():
APIContainer.log_debug("checking queue for %s", api_name)
if api_name not in APIContainer.API_CONTAINERS:
APIConnector.release_connectors(api_name)
APIQueue.release_queue(api_name)