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# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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# contributor license agreements. See the NOTICE file distributed with |
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# this work for additional information regarding copyright ownership. |
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# The ASF licenses this file to You under the Apache License, Version 2.0 |
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# (the "License"); you may not use this file except in compliance with |
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# the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import socket |
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import retrying |
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from oslo_config import cfg |
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from kombu import Connection |
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from st2common import log as logging |
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from st2common.transport import utils as transport_utils |
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from st2common.transport.actionexecutionstate import ACTIONEXECUTIONSTATE_XCHG |
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from st2common.transport.announcement import ANNOUNCEMENT_XCHG |
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from st2common.transport.connection_retry_wrapper import ConnectionRetryWrapper |
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from st2common.transport.execution import EXECUTION_XCHG |
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from st2common.transport.liveaction import LIVEACTION_XCHG, LIVEACTION_STATUS_MGMT_XCHG |
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from st2common.transport.reactor import SENSOR_CUD_XCHG |
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from st2common.transport.reactor import TRIGGER_CUD_XCHG, TRIGGER_INSTANCE_XCHG |
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from st2common.transport import actionexecutionstate |
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from st2common.transport import announcement |
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from st2common.transport import execution |
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from st2common.transport import liveaction |
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from st2common.transport import reactor |
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LOG = logging.getLogger('st2common.transport.bootstrap') |
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__all__ = [ |
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'register_exchanges', |
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'EXCHANGES', |
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'QUEUES' |
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] |
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# List of exchanges which are pre-declared on service set up. |
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EXCHANGES = [ |
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ACTIONEXECUTIONSTATE_XCHG, |
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ANNOUNCEMENT_XCHG, |
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EXECUTION_XCHG, |
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LIVEACTION_XCHG, |
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LIVEACTION_STATUS_MGMT_XCHG, |
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TRIGGER_CUD_XCHG, |
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TRIGGER_INSTANCE_XCHG, |
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SENSOR_CUD_XCHG |
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] |
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# List of queues which are pre-declared on service set up. |
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# Because of the worker model used, this is required with some non-standard transports such as |
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# Redis one. Even though kombu requires queues to be pre-declared upfront in such scenarios, |
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# RabbitMQ transport doesn't require that. |
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QUEUES = [ |
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actionexecutionstate.get_queue(name='st2.preinit', routing_key='init'), |
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announcement.get_queue(name='st2.preinit', routing_key='init'), |
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execution.get_queue(name='st2.preinit', routing_key='init'), |
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liveaction.get_queue(name='st2.preinit', routing_key='init'), |
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liveaction.get_status_management_queue(name='st2.preinit', routing_key='init'), |
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reactor.get_trigger_cud_queue(name='st2.preinit', routing_key='init'), |
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reactor.get_trigger_instances_queue(name='st2.preinit', routing_key='init'), |
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reactor.get_sensor_cud_queue(name='st2.preinit', routing_key='init'), |
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] |
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def _do_register_exchange(exchange, connection, channel, retry_wrapper): |
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try: |
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kwargs = { |
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'exchange': exchange.name, |
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'type': exchange.type, |
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'durable': exchange.durable, |
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'auto_delete': exchange.auto_delete, |
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'arguments': exchange.arguments, |
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'nowait': False, |
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'passive': False |
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} |
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# Use the retry wrapper to increase resiliency in recoverable errors. |
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retry_wrapper.ensured(connection=connection, |
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obj=channel, |
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to_ensure_func=channel.exchange_declare, |
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**kwargs) |
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LOG.debug('Registered exchange %s (%s).' % (exchange.name, str(kwargs))) |
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except Exception: |
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LOG.exception('Failed to register exchange: %s.', exchange.name) |
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def _do_predeclare_queue(channel, queue): |
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LOG.debug('Predeclaring queue for exchange "%s"' % (queue.exchange.name)) |
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bound_queue = None |
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try: |
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bound_queue = queue(channel) |
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bound_queue.declare(nowait=False) |
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LOG.debug('Predeclared queue for exchange "%s"' % (queue.exchange.name)) |
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except Exception: |
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LOG.exception('Failed to predeclare queue for exchange "%s"' % (queue.exchange.name)) |
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return bound_queue |
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def register_exchanges(): |
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LOG.debug('Registering exchanges...') |
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connection_urls = transport_utils.get_messaging_urls() |
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with Connection(connection_urls) as conn: |
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# Use ConnectionRetryWrapper to deal with rmq clustering etc. |
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retry_wrapper = ConnectionRetryWrapper(cluster_size=len(connection_urls), logger=LOG) |
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def wrapped_register_exchanges(connection, channel): |
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for exchange in EXCHANGES: |
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_do_register_exchange(exchange=exchange, connection=connection, channel=channel, |
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retry_wrapper=retry_wrapper) |
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retry_wrapper.run(connection=conn, wrapped_callback=wrapped_register_exchanges) |
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def wrapped_predeclare_queues(connection, channel): |
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for queue in QUEUES: |
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_do_predeclare_queue(channel=channel, queue=queue) |
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if cfg.CONF.messaging.predeclare_queues: |
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retry_wrapper.run(connection=conn, wrapped_callback=wrapped_predeclare_queues) |
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def register_exchanges_with_retry(): |
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def retry_if_io_error(exception): |
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return isinstance(exception, socket.error) |
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retrying_obj = retrying.Retrying( |
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retry_on_exception=retry_if_io_error, |
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wait_fixed=cfg.CONF.messaging.connection_retry_wait, |
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stop_max_attempt_number=cfg.CONF.messaging.connection_retries |
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) |
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return retrying_obj.call(register_exchanges) |
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StackStorm /
st2
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