def configure_extensions(app):
# I18N
babel.init_app(app)
# Database
db.init_app(app)
# CouchDB
couchdbmanager.setup(app)
couchdbmanager.sync(app)
# Login
login_manager.init_app(app)
login_manager.login_view = "authentification.login"
# Roles
principal.init_app(app)
# Mail
mail.init_app(app)
# Plugins list global
plugin_manager.init_plugin_manager(app.root_path + "/plugins", app)
plugin_manager.activate_plugins()
plugin_manager.setup_plugins()
def start_worker_for_queue(flow='simple_queue_processor', queue='zmon:queue:default', **execution_context):
"""
Starting execution point to the workflows
"""
known_flows = {'simple_queue_processor': flow_simple_queue_processor}
if flow not in known_flows:
logger.exception("Bad role: %s" % flow)
sys.exit(1)
logger.info("Starting worker with pid=%s, flow type: %s, queue: %s, execution_context: %s", os.getpid(), flow,
queue, execution_context)
setproctitle.setproctitle('zmon-worker {} {}'.format(flow, queue))
# init the plugin manager
plugin_manager.init_plugin_manager()
# load external plugins (should be run only once)
plugin_manager.collect_plugins(global_config=get_config(), load_builtins=True, load_env=True)
# start Flow Reactor here
FlowControlReactor.get_instance().start()
exit_code = 0
try:
known_flows[flow](queue=queue, **execution_context)
except (KeyboardInterrupt, SystemExit):
logger.warning("Caught user signal to stop consumer: finishing!")
except Exception:
logger.exception("Exception in start_worker(). Details: ")
exit_code = 2
finally:
FlowControlReactor.get_instance().stop()
sys.exit(exit_code)
def main(args=None):
args = parse_args(args)
main_proc = rpc_server.MainProcess()
config = {}
# load default configuration from file
for path in (args.config_file, 'config.yaml'):
if path and os.path.exists(path):
config = read_config(path)
break
process_config(config)
# allow overwritting any configuration setting via env vars
for k, v in os.environ.items():
if k.startswith('WORKER_'):
config[k.replace("WORKER_", "").replace("_", ".").lower()] = v
# make zmon worker compatible with old redis config vars
if 'redis.host' in config:
port = config.get('redis.port', 6379)
config.update(
{"redis.servers": '{}:{}'.format(config["redis.host"], port)})
# save config in our settings module
settings.set_workers_log_level(config.get('loglevel', 'INFO'))
settings.set_external_config(config)
settings.set_rpc_server_port(config.get('server.port'))
logging.config.dictConfig(settings.RPC_SERVER_CONF['LOGGING'])
logger = logging.getLogger(__name__)
# start the process controller
main_proc.start_proc_control()
# start web server process under supervision
main_proc.proc_control.spawn_process(
target=start_web,
kwargs=dict(
listen_on=config.get('webserver.listen_on', '0.0.0.0'),
port=int(config.get('webserver.port', '8080')),
log_conf=None,
threaded=True,
rpc_url='http://{host}:{port}{path}'.format(
host='localhost',
port=config.get('server.port'),
path=settings.RPC_SERVER_CONF['RPC_PATH']),
),
flags=MONITOR_RESTART, # web server will be restarted if dies
)
# init the plugin manager
plugin_manager.init_plugin_manager()
# load external plugins (should be run only once)
plugin_manager.collect_plugins(global_config=config,
load_builtins=True,
load_env=True)
# start worker processes per queue according to the config
queues = config['zmon.queues']
for qn in queues.split(','):
queue, N = (qn.rsplit('/', 1) + [DEFAULT_NUM_PROC])[:2]
main_proc.proc_control.spawn_many(
int(N),
kwargs={
'queue': queue,
'flow': 'simple_queue_processor',
'tracer': config.get('opentracing.tracer'),
'tracer_tags': {
'team': config.get('team', 'UNKNOWN'),
'account': config.get('account', 'UNKNOWN'),
'region': config.get('region', 'UNKNOWN'),
},
},
flags=MONITOR_RESTART | MONITOR_KILL_REQ | MONITOR_PING)
if not args.no_rpc:
try:
main_proc.start_rpc_server()
except (KeyboardInterrupt, SystemExit):
logger.info('RPC server stopped. Exiting main')
return main_proc