99 lines
3.6 KiB
Python
99 lines
3.6 KiB
Python
# Copyright 2017 AT&T Intellectual Property. All other rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# 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 configparser
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import logging
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import time
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from airflow.exceptions import AirflowException
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try:
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from service_session import ucp_keystone_session
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except ImportError:
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from shipyard_airflow.plugins.service_session import ucp_keystone_session
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# Lookup values for configuration to find the real service type for components
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SHIPYARD = 'shipyard'
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DRYDOCK = 'drydock'
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ARMADA = 'armada'
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DECKHAND = 'deckhand'
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PROMENADE = 'promenade'
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LOG = logging.getLogger(__name__)
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def _ucp_service_endpoint(shipyard_conf, svc_type, addl_headers=None):
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# Initialize variables
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retry = 0
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int_endpoint = None
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# Retrieve Keystone Session
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sess = ucp_keystone_session(shipyard_conf,
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additional_headers=addl_headers)
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# We will allow 1 retry in getting the Keystone Endpoint with a
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# backoff interval of 10 seconds in case there is a temporary
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# glitch in the network or transient problems with the keystone-api
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# pod
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while retry <= 1:
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# Retrieve Keystone Endpoint
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# We will make use of internal endpoint
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logging.info("Get Keystone Endpoint")
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int_endpoint = sess.get_endpoint(interface='internal',
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service_type=svc_type)
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# Retry if we fail to get keystone endpoint
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if int_endpoint:
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logging.info("Successfully Retrieved Keystone Endpoint")
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break
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else:
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logging.info("Unable to get Keystone endpoint on first attempt")
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logging.info("Retrying after 10 seconds...")
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time.sleep(10)
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retry += 1
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# Raise Execptions if we fail to get the keystone endpoint
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if not int_endpoint:
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raise AirflowException("Unable to get Keystone Endpoint!")
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else:
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return int_endpoint
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class ServiceEndpoints():
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"""Class that serves service endpoints"""
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def __init__(self, shipyard_conf):
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self.shipyard_conf = shipyard_conf
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# Read and parse shiyard.conf
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self.config = configparser.ConfigParser()
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self.config.read(self.shipyard_conf)
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def endpoint_by_name(self, svc_name, addl_headers=None):
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"""Return the service endpoint for the named service.
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:param svc_name: name of the service from which the service type will
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be discovered from the shipyard configuration. Constants in this
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module provide names that can be used with an expectation that they
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work with a standard/complete configuration file.
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E.g.: service_endpoint.DRYDOCK
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:param dict addl_headers: Additional headers that should be attached
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to every request passing through the session.
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Headers of the same name specified per request will take priority.
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"""
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LOG.info("Looking up service endpoint for: %s", svc_name)
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svc_type = self.config.get(svc_name, 'service_type')
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return _ucp_service_endpoint(self.shipyard_conf,
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svc_type,
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addl_headers=addl_headers)
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