220 lines
7.7 KiB
Python
220 lines
7.7 KiB
Python
import logging
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import trollius
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import json
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from autobahn.asyncio.wamp import RouterFactory, RouterSessionFactory
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from autobahn.asyncio.websocket import WampWebSocketServerFactory
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from autobahn.wamp import types
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from aiowsgi import create_server as create_wsgi_server
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from flask import Flask
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from threading import Event
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from trollius.tasks import Task
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from trollius.coroutines import From
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from datetime import timedelta
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from buildman.enums import BuildJobResult, BuildServerStatus
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from buildman.jobutil.buildstatus import StatusHandler
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from buildman.jobutil.buildjob import BuildJob, BuildJobLoadException
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from data import database
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from app import app, build_metrics
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logger = logging.getLogger(__name__)
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WORK_CHECK_TIMEOUT = 10
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TIMEOUT_PERIOD_MINUTES = 20
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JOB_TIMEOUT_SECONDS = 300
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MINIMUM_JOB_EXTENSION = timedelta(minutes=2)
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HEARTBEAT_PERIOD_SEC = 30
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class BuilderServer(object):
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""" Server which handles both HTTP and WAMP requests, managing the full state of the build
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controller.
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"""
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def __init__(self, registry_hostname, queue, build_logs, user_files, lifecycle_manager_klass,
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lifecycle_manager_config, manager_hostname):
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self._loop = None
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self._current_status = BuildServerStatus.STARTING
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self._current_components = []
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self._job_count = 0
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self._session_factory = RouterSessionFactory(RouterFactory())
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self._registry_hostname = registry_hostname
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self._queue = queue
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self._build_logs = build_logs
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self._user_files = user_files
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self._lifecycle_manager = lifecycle_manager_klass(
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self._register_component,
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self._unregister_component,
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self._job_heartbeat,
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self._job_complete,
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manager_hostname,
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HEARTBEAT_PERIOD_SEC,
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)
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self._lifecycle_manager_config = lifecycle_manager_config
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self._shutdown_event = Event()
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self._current_status = BuildServerStatus.RUNNING
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self._register_controller()
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def _register_controller(self):
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controller_app = Flask('controller')
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server = self
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@controller_app.route('/status')
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def status():
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metrics = server._queue.get_metrics(require_transaction=False)
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(running_count, available_not_running_count, available_count) = metrics
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workers = [component for component in server._current_components
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if component.kind() == 'builder']
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data = {
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'status': server._current_status,
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'running_local': server._job_count,
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'running_total': running_count,
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'workers': len(workers),
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'job_total': available_count + running_count
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}
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return json.dumps(data)
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self._controller_app = controller_app
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def run(self, host, websocket_port, controller_port, ssl=None):
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logger.debug('Initializing the lifecycle manager')
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self._lifecycle_manager.initialize(self._lifecycle_manager_config)
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logger.debug('Initializing all members of the event loop')
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loop = trollius.get_event_loop()
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logger.debug('Starting server on port %s, with controller on port %s', websocket_port,
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controller_port)
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try:
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loop.run_until_complete(self._initialize(loop, host, websocket_port, controller_port, ssl))
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except KeyboardInterrupt:
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pass
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finally:
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loop.close()
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def close(self):
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logger.debug('Requested server shutdown')
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self._current_status = BuildServerStatus.SHUTDOWN
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self._lifecycle_manager.shutdown()
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self._shutdown_event.wait()
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logger.debug('Shutting down server')
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def _register_component(self, realm, component_klass, **kwargs):
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""" Registers a component with the server. The component_klass must derive from
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BaseComponent.
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"""
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logger.debug('Registering component with realm %s', realm)
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component = component_klass(types.ComponentConfig(realm=realm), realm=realm, **kwargs)
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component.server = self
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component.parent_manager = self._lifecycle_manager
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component.build_logs = self._build_logs
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component.user_files = self._user_files
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component.registry_hostname = self._registry_hostname
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self._current_components.append(component)
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self._session_factory.add(component)
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return component
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def _unregister_component(self, component):
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logger.debug('Unregistering component with realm %s and token %s',
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component.builder_realm, component.expected_token)
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self._current_components.remove(component)
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self._session_factory.remove(component)
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def _job_heartbeat(self, build_job):
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self._queue.extend_processing(build_job.job_item, seconds_from_now=JOB_TIMEOUT_SECONDS,
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minimum_extension=MINIMUM_JOB_EXTENSION)
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def _job_complete(self, build_job, job_status):
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if job_status == BuildJobResult.INCOMPLETE:
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self._queue.incomplete(build_job.job_item, restore_retry=False, retry_after=30)
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else:
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self._queue.complete(build_job.job_item)
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self._job_count = self._job_count - 1
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if self._current_status == BuildServerStatus.SHUTDOWN and not self._job_count:
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self._shutdown_event.set()
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build_metrics.report_completion_status(job_status)
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@trollius.coroutine
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def _work_checker(self):
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logger.debug('Initializing work checker')
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while self._current_status == BuildServerStatus.RUNNING:
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with database.CloseForLongOperation(app.config):
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yield From(trollius.sleep(WORK_CHECK_TIMEOUT))
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logger.debug('Checking for more work for %d active workers',
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self._lifecycle_manager.num_workers())
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job_item = self._queue.get(processing_time=self._lifecycle_manager.setup_time())
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if job_item is None:
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logger.debug('No additional work found. Going to sleep for %s seconds', WORK_CHECK_TIMEOUT)
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continue
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try:
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build_job = BuildJob(job_item)
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except BuildJobLoadException as irbe:
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logger.exception(irbe)
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self._queue.incomplete(job_item, restore_retry=False)
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continue
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logger.debug('Build job found. Checking for an avaliable worker.')
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try:
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scheduled = yield From(self._lifecycle_manager.schedule(build_job))
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except:
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logger.exception('Exception when scheduling job')
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self._current_status = BuildServerStatus.EXCEPTION
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return
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if scheduled:
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logger.debug('Marking build %s as scheduled', build_job.repo_build.uuid)
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status_handler = StatusHandler(self._build_logs, build_job.repo_build.uuid)
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status_handler.set_phase('build-scheduled')
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self._job_count = self._job_count + 1
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logger.debug('Build job %s scheduled. Running: %s', build_job.repo_build.uuid,
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self._job_count)
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else:
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logger.debug('All workers are busy. Requeuing.')
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self._queue.incomplete(job_item, restore_retry=True, retry_after=0)
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@trollius.coroutine
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def _queue_metrics_updater(self):
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logger.debug('Initializing queue metrics updater')
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while self._current_status == BuildServerStatus.RUNNING:
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logger.debug('Writing metrics')
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self._queue.update_metrics()
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logger.debug('Metrics going to sleep for 30 seconds')
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yield From(trollius.sleep(30))
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@trollius.coroutine
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def _initialize(self, loop, host, websocket_port, controller_port, ssl=None):
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self._loop = loop
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# Create the WAMP server.
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transport_factory = WampWebSocketServerFactory(self._session_factory, debug_wamp=False)
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transport_factory.setProtocolOptions(failByDrop=True)
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# Initialize the controller server and the WAMP server
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create_wsgi_server(self._controller_app, loop=loop, host=host, port=controller_port, ssl=ssl)
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yield From(loop.create_server(transport_factory, host, websocket_port, ssl=ssl))
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# Initialize the metrics updater
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trollius.async(self._queue_metrics_updater())
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# Initialize the work queue checker.
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yield From(self._work_checker())
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