def make_observer_chain(ultimate_observer, indent):
"""
Return our feature observers wrapped our the ultimate_observer
"""
add_to_fanout(
ObserverWrapper(JSONObserverWrapper(ultimate_observer,
sort_keys=True,
indent=indent or None),
hostname=socket.gethostname()))
return throttling_wrapper(
SpecificationObserverWrapper(
PEP3101FormattingWrapper(
SystemFilterWrapper(
ErrorFormattingWrapper(cf_id_wrapper(get_fanout()))))))
def make_observer_chain(ultimate_observer, indent):
"""
Return our feature observers wrapped our the ultimate_observer
"""
add_to_fanout(
ObserverWrapper(
JSONObserverWrapper(
ultimate_observer,
sort_keys=True,
indent=indent or None),
hostname=socket.gethostname()))
return throttling_wrapper(
SpecificationObserverWrapper(
PEP3101FormattingWrapper(
SystemFilterWrapper(
ErrorFormattingWrapper(
cf_id_wrapper(
get_fanout()))))))
def test_global_fanout(self):
"""
Setting and getting and adding to the global fanout observer.
"""
obs1, obs2 = [], []
self.assertEqual(get_fanout(), None)
# add_to_fanout when there is no fanout
add_to_fanout(obs1.append)
fanout = get_fanout()
self.assertEqual(fanout.subobservers, [obs1.append])
# add_to_fanout when there is already a fanout
add_to_fanout(obs2.append)
self.assertIs(get_fanout(), fanout)
self.assertEqual(fanout.subobservers, [obs1.append, obs2.append])
# set_fanout
set_fanout(None)
self.assertEqual(get_fanout(), None)
def test_global_fanout(self):
"""
Setting and getting and adding to the global fanout observer.
"""
obs1, obs2 = [], []
self.assertEqual(get_fanout(), None)
# add_to_fanout when there is no fanout
add_to_fanout(obs1.append)
fanout = get_fanout()
self.assertEqual(fanout.subobservers, [obs1.append])
# add_to_fanout when there is already a fanout
add_to_fanout(obs2.append)
self.assertIs(get_fanout(), fanout)
self.assertEqual(fanout.subobservers, [obs1.append, obs2.append])
# set_fanout
set_fanout(None)
self.assertEqual(get_fanout(), None)
def makeService(config):
"""
Set up the otter-api service.
"""
config = dict(config)
set_config_data(config)
parent = MultiService()
region = config_value('region')
seed_endpoints = [
clientFromString(reactor, str(host))
for host in config_value('cassandra.seed_hosts')]
cassandra_cluster = LoggingCQLClient(
TimingOutCQLClient(
reactor,
RoundRobinCassandraCluster(
seed_endpoints,
config_value('cassandra.keyspace'),
disconnect_on_cancel=True),
config_value('cassandra.timeout') or 30),
log.bind(system='otter.silverberg'))
store = CassScalingGroupCollection(
cassandra_cluster, reactor, config_value('limits.absolute.maxGroups'))
admin_store = CassAdmin(cassandra_cluster)
bobby_url = config_value('bobby_url')
if bobby_url is not None:
set_bobby(BobbyClient(bobby_url))
service_configs = get_service_configs(config)
authenticator = generate_authenticator(reactor, config['identity'])
supervisor = SupervisorService(authenticator, region, coiterate,
service_configs)
supervisor.setServiceParent(parent)
set_supervisor(supervisor)
health_checker = HealthChecker(reactor, {
'store': getattr(store, 'health_check', None),
'kazoo': store.kazoo_health_check,
'supervisor': supervisor.health_check
})
# Setup cassandra cluster to disconnect when otter shuts down
if 'cassandra_cluster' in locals():
parent.addService(FunctionalService(stop=partial(
call_after_supervisor, cassandra_cluster.disconnect, supervisor)))
otter = Otter(store, region, health_checker.health_check)
site = Site(otter.app.resource())
site.displayTracebacks = False
api_service = service(str(config_value('port')), site)
api_service.setServiceParent(parent)
# Setup admin service
admin_port = config_value('admin')
if admin_port:
admin = OtterAdmin(admin_store)
admin_site = Site(admin.app.resource())
admin_site.displayTracebacks = False
admin_service = service(str(admin_port), admin_site)
admin_service.setServiceParent(parent)
# setup cloud feed
cf_conf = config.get('cloudfeeds', None)
if cf_conf is not None:
id_conf = deepcopy(config['identity'])
id_conf['strategy'] = 'single_tenant'
add_to_fanout(CloudFeedsObserver(
reactor=reactor,
authenticator=generate_authenticator(reactor, id_conf),
tenant_id=cf_conf['tenant_id'],
region=region,
service_configs=service_configs))
# Setup Kazoo client
if config_value('zookeeper'):
threads = config_value('zookeeper.threads') or 10
disable_logs = config_value('zookeeper.no_logs')
threadpool = ThreadPool(maxthreads=threads)
sync_kz_client = KazooClient(
hosts=config_value('zookeeper.hosts'),
# Keep trying to connect until the end of time with
# max interval of 10 minutes
connection_retry=dict(max_tries=-1, max_delay=600),
logger=None if disable_logs else TxLogger(log.bind(system='kazoo'))
)
kz_client = TxKazooClient(reactor, threadpool, sync_kz_client)
# Don't timeout. Keep trying to connect forever
d = kz_client.start(timeout=None)
def on_client_ready(_):
dispatcher = get_full_dispatcher(reactor, authenticator, log,
get_service_configs(config),
kz_client, store, supervisor,
cassandra_cluster)
# Setup scheduler service after starting
scheduler = setup_scheduler(parent, dispatcher, store, kz_client)
health_checker.checks['scheduler'] = scheduler.health_check
otter.scheduler = scheduler
# Give dispatcher to Otter REST object
otter.dispatcher = dispatcher
# Set the client after starting
# NOTE: There is small amount of time when the start is
# not finished and the kz_client is not set in which case
# policy execution and group delete will fail
store.kz_client = kz_client
# Setup kazoo to stop when shutting down
parent.addService(FunctionalService(
stop=partial(call_after_supervisor,
kz_client.stop, supervisor)))
setup_converger(
parent, kz_client, dispatcher,
config_value('converger.interval') or 10,
config_value('converger.build_timeout') or 3600,
config_value('converger.limited_retry_iterations') or 10,
config_value('converger.step_limits') or {})
d.addCallback(on_client_ready)
d.addErrback(log.err, 'Could not start TxKazooClient')
return parent