141 lines
5.1 KiB
Python
141 lines
5.1 KiB
Python
# Copyright (c) 2013 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from collections import namedtuple
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from amqplib.client_0_8 import Message
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import anyjson
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import eventlet
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from muranoapi.common import config
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from muranoapi.db.models import Session, Environment
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from muranoapi.db.session import get_session
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amqp = eventlet.patcher.import_patched('amqplib.client_0_8')
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rabbitmq = config.CONF.rabbitmq
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SessionState = namedtuple('SessionState', ['open', 'deploying', 'deployed'])(
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open='open', deploying='deploying', deployed='deployed'
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)
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class SessionServices(object):
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@staticmethod
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def get_sessions(environment_id, state=None):
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"""
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Get list of sessions for specified environment
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:param environment_id: Environment Id
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:param state: glazierapi.db.services.environments.EnvironmentStatus
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:return: Sessions for specified Environment, if SessionState is
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not defined all sessions for specified environment is returned.
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"""
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unit = get_session()
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# Here we duplicate logic for reducing calls to database
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# Checks for validation is same as in validate.
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environment = unit.query(Environment).get(environment_id)
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return unit.query(Session).filter(
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#Get all session for this environment
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Session.environment_id == environment_id,
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#in this state, if state is not specified return in all states
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Session.state.in_(SessionState if state is None else [state]),
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#Only sessions with same version as current env version are valid
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Session.version == environment.version
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).all()
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@staticmethod
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def create(environment_id, user_id):
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"""
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Creates session object for specific environment for specified user.
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:param environment_id: Environment Id
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:param user_id: User Id
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:return: Created session
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"""
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unit = get_session()
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environment = unit.query(Environment).get(environment_id)
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session = Session()
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session.environment_id = environment.id
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session.user_id = user_id
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session.state = SessionState.open
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# used for checking if other sessions was deployed before this one
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session.version = environment.version
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# all changes to environment is stored here, and translated to
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# environment only after deployment completed
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session.description = environment.description
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with unit.begin():
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unit.add(session)
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return session
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@staticmethod
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def validate(session):
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"""
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Session is valid only if no other session for same
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environment was already deployed on in deploying state,
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:param session: Session for validation
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"""
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#if other session is deploying now current session is invalid
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unit = get_session()
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other_is_deploying = unit.query(Session).filter_by(
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environment_id=session.environment_id, state=SessionState.deploying
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).count() > 0
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if session.state == SessionState.open and other_is_deploying:
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return False
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#if environment version is higher then version on which current session
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#is created then other session was already deployed
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current_env = unit.query(Environment).get(session.environment_id)
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if current_env.version > session.version:
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return False
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return True
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@staticmethod
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def deploy(session, token):
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"""
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Prepares environment for deployment and send deployment command to
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orchestration engine
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:param session: session that is going to be deployed
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:param token: auth token that is going to be used by orchestration
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"""
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unit = get_session()
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#Set X-Auth-Token for conductor
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environment = session.description
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environment['token'] = token
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session.state = SessionState.deploying
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session.save(unit)
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connection = amqp.Connection('{0}:{1}'.
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format(rabbitmq.host, rabbitmq.port),
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virtual_host=rabbitmq.virtual_host,
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userid=rabbitmq.login,
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password=rabbitmq.password,
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ssl=rabbitmq.use_ssl, insist=True)
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channel = connection.channel()
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channel.exchange_declare('tasks', 'direct', durable=True,
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auto_delete=False)
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channel.basic_publish(
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Message(body=anyjson.serialize(environment)), 'tasks', 'tasks'
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)
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