466 lines
17 KiB
Python
466 lines
17 KiB
Python
# Copyright 2012 Hewlett-Packard Development Company, L.P.
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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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import gear
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import inspect
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import json
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import logging
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import time
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import threading
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from uuid import uuid4
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import zuul.model
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from zuul.model import Build
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class GearmanCleanup(threading.Thread):
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""" A thread that checks to see if outstanding builds have
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completed without reporting back. """
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log = logging.getLogger("zuul.JenkinsCleanup")
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def __init__(self, gearman):
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threading.Thread.__init__(self)
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self.daemon = True
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self.gearman = gearman
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self.wake_event = threading.Event()
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self._stopped = False
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def stop(self):
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self._stopped = True
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self.wake_event.set()
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def run(self):
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while True:
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self.wake_event.wait(300)
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if self._stopped:
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return
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try:
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self.gearman.lookForLostBuilds()
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except:
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self.log.exception("Exception checking builds:")
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def getJobData(job):
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if not len(job.data):
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return {}
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d = job.data[-1]
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if not d:
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return {}
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return json.loads(d)
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class ZuulGearmanClient(gear.Client):
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def __init__(self, zuul_gearman):
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super(ZuulGearmanClient, self).__init__()
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self.__zuul_gearman = zuul_gearman
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def handleWorkComplete(self, packet):
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job = super(ZuulGearmanClient, self).handleWorkComplete(packet)
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self.__zuul_gearman.onBuildCompleted(job)
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return job
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def handleWorkFail(self, packet):
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job = super(ZuulGearmanClient, self).handleWorkFail(packet)
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self.__zuul_gearman.onBuildCompleted(job)
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return job
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def handleWorkException(self, packet):
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job = super(ZuulGearmanClient, self).handleWorkException(packet)
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self.__zuul_gearman.onBuildCompleted(job)
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return job
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def handleWorkStatus(self, packet):
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job = super(ZuulGearmanClient, self).handleWorkStatus(packet)
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self.__zuul_gearman.onWorkStatus(job)
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return job
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def handleWorkData(self, packet):
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job = super(ZuulGearmanClient, self).handleWorkData(packet)
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self.__zuul_gearman.onWorkStatus(job)
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return job
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def handleDisconnect(self, job):
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job = super(ZuulGearmanClient, self).handleDisconnect(job)
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self.__zuul_gearman.onDisconnect(job)
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def handleStatusRes(self, packet):
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try:
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job = super(ZuulGearmanClient, self).handleStatusRes(packet)
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except gear.UnknownJobError:
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handle = packet.getArgument(0)
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for build in self.__zuul_gearman.builds:
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if build.__gearman_job.handle == handle:
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self.__zuul_gearman.onUnknownJob(job)
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def waitForGearmanToSettle(self):
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# If we're running the internal gearman server, it's possible
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# that after a restart or reload, we may be immediately ready
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# to run jobs but all the gearman workers may not have
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# registered yet. Give them a sporting chance to show up
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# before we start declaring jobs lost because we don't have
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# gearman functions registered for them.
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# Spend up to 30 seconds after we connect to the gearman
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# server waiting for the set of defined jobs to become
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# consistent over a sliding 5 second window.
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self.log.info("Waiting for connection to internal Gearman server")
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self.waitForServer()
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self.log.info("Waiting for gearman function set to settle")
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start = time.time()
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last_change = start
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all_functions = set()
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while time.time() - start < 30:
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now = time.time()
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last_functions = set()
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for connection in self.active_connections:
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try:
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req = gear.StatusAdminRequest()
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connection.sendAdminRequest(req)
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except Exception:
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self.log.exception("Exception while checking functions")
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continue
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for line in req.response.split('\n'):
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parts = [x.strip() for x in line.split()]
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if not parts or parts[0] == '.':
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continue
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last_functions.add(parts[0])
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if last_functions != all_functions:
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last_change = now
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all_functions.update(last_functions)
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else:
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if now - last_change > 5:
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self.log.info("Gearman function set has settled")
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break
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time.sleep(1)
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self.log.info("Done waiting for Gearman server")
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class Gearman(object):
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log = logging.getLogger("zuul.Gearman")
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negative_function_cache_ttl = 5
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def __init__(self, config, sched):
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self.sched = sched
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self.builds = {}
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self.meta_jobs = {} # A list of meta-jobs like stop or describe
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self.zuul_server = config.get('zuul', 'zuul_url')
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server = config.get('gearman', 'server')
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if config.has_option('gearman', 'port'):
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port = config.get('gearman', 'port')
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else:
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port = 4730
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self.gearman = ZuulGearmanClient(self)
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self.gearman.addServer(server, port)
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if (config.has_option('gearman_server', 'start') and
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config.getboolean('gearman_server', 'start')):
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self.gearman.waitForGearmanToSettle()
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self.cleanup_thread = GearmanCleanup(self)
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self.cleanup_thread.start()
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self.function_cache = set()
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self.function_cache_time = 0
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def stop(self):
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self.log.debug("Stopping")
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self.cleanup_thread.stop()
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self.cleanup_thread.join()
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self.gearman.shutdown()
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self.log.debug("Stopped")
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def isJobRegistered(self, name):
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if self.function_cache_time:
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for connection in self.gearman.active_connections:
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if connection.connect_time > self.function_cache_time:
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self.function_cache = set()
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self.function_cache_time = 0
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break
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if name in self.function_cache:
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self.log.debug("Function %s is registered" % name)
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return True
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if ((time.time() - self.function_cache_time) <
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self.negative_function_cache_ttl):
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self.log.debug("Function %s is not registered "
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"(negative ttl in effect)" % name)
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return False
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self.function_cache_time = time.time()
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for connection in self.gearman.active_connections:
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try:
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req = gear.StatusAdminRequest()
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connection.sendAdminRequest(req)
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except Exception:
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self.log.exception("Exception while checking functions")
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continue
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for line in req.response.split('\n'):
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parts = [x.strip() for x in line.split()]
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if not parts or parts[0] == '.':
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continue
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self.function_cache.add(parts[0])
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if name in self.function_cache:
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self.log.debug("Function %s is registered" % name)
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return True
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self.log.debug("Function %s is not registered" % name)
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return False
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def launch(self, job, item, pipeline, dependent_items=[]):
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self.log.info("Launch job %s for change %s with dependent changes %s" %
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(job, item.change,
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[x.change for x in dependent_items]))
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dependent_items = dependent_items[:]
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dependent_items.reverse()
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uuid = str(uuid4().hex)
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params = dict(ZUUL_UUID=uuid,
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ZUUL_PROJECT=item.change.project.name)
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params['ZUUL_PIPELINE'] = pipeline.name
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params['ZUUL_URL'] = self.zuul_server
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if hasattr(item.change, 'refspec'):
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changes_str = '^'.join(
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['%s:%s:%s' % (i.change.project.name, i.change.branch,
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i.change.refspec)
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for i in dependent_items + [item]])
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params['ZUUL_BRANCH'] = item.change.branch
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params['ZUUL_CHANGES'] = changes_str
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params['ZUUL_REF'] = ('refs/zuul/%s/%s' %
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(item.change.branch,
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item.current_build_set.ref))
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params['ZUUL_COMMIT'] = item.current_build_set.commit
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zuul_changes = ' '.join(['%s,%s' % (i.change.number,
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i.change.patchset)
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for i in dependent_items + [item]])
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params['ZUUL_CHANGE_IDS'] = zuul_changes
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params['ZUUL_CHANGE'] = str(item.change.number)
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params['ZUUL_PATCHSET'] = str(item.change.patchset)
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if hasattr(item.change, 'ref'):
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params['ZUUL_REFNAME'] = item.change.ref
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params['ZUUL_OLDREV'] = item.change.oldrev
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params['ZUUL_NEWREV'] = item.change.newrev
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params['ZUUL_REF'] = item.change.ref
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params['ZUUL_COMMIT'] = item.change.newrev
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# This is what we should be heading toward for parameters:
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# required:
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# ZUUL_UUID
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# ZUUL_REF (/refs/zuul/..., /refs/tags/foo, master)
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# ZUUL_COMMIT
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# optional:
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# ZUUL_PROJECT
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# ZUUL_PIPELINE
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# optional (changes only):
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# ZUUL_BRANCH
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# ZUUL_CHANGE
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# ZUUL_CHANGE_IDS
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# ZUUL_PATCHSET
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# optional (ref updated only):
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# ZUUL_OLDREV
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# ZUUL_NEWREV
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if callable(job.parameter_function):
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pargs = inspect.getargspec(job.parameter_function)
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if len(pargs.args) == 2:
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job.parameter_function(item, params)
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else:
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job.parameter_function(item, job, params)
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self.log.debug("Custom parameter function used for job %s, "
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"change: %s, params: %s" % (job, item.change,
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params))
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if 'ZUUL_NODE' in params:
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name = "build:%s:%s" % (job.name, params['ZUUL_NODE'])
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else:
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name = "build:%s" % job.name
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build = Build(job, uuid)
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build.parameters = params
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gearman_job = gear.Job(name, json.dumps(params),
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unique=uuid)
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build.__gearman_job = gearman_job
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self.builds[uuid] = build
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if not self.isJobRegistered(gearman_job.name):
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self.log.error("Job %s is not registered with Gearman" %
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gearman_job)
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self.onBuildCompleted(gearman_job, 'LOST')
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return build
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if pipeline.precedence == zuul.model.PRECEDENCE_NORMAL:
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precedence = gear.PRECEDENCE_NORMAL
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elif pipeline.precedence == zuul.model.PRECEDENCE_HIGH:
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precedence = gear.PRECEDENCE_HIGH
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elif pipeline.precedence == zuul.model.PRECEDENCE_LOW:
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precedence = gear.PRECEDENCE_LOW
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try:
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self.gearman.submitJob(gearman_job, precedence=precedence)
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except Exception:
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self.log.exception("Unable to submit job to Gearman")
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self.onBuildCompleted(gearman_job, 'LOST')
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return build
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if not gearman_job.handle:
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self.log.error("No job handle was received for %s after 30 seconds"
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" marking as lost." %
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gearman_job)
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self.onBuildCompleted(gearman_job, 'LOST')
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return build
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def cancel(self, build):
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self.log.info("Cancel build %s for job %s" % (build, build.job))
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build.canceled = True
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if build.number is not None:
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self.log.debug("Build %s has already started" % build)
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self.cancelRunningBuild(build)
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self.log.debug("Canceled running build %s" % build)
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return
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else:
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self.log.debug("Build %s has not started yet" % build)
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self.log.debug("Looking for build %s in queue" % build)
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if self.cancelJobInQueue(build):
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self.log.debug("Removed build %s from queue" % build)
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return
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self.log.debug("Still unable to find build %s to cancel" % build)
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if build.number:
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self.log.debug("Build %s has just started" % build)
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self.cancelRunningBuild(build)
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self.log.debug("Canceled just running build %s" % build)
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else:
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self.log.error("Build %s has not started but "
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"was not found in queue" % build)
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def onBuildCompleted(self, job, result=None):
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if job.unique in self.meta_jobs:
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del self.meta_jobs[job.unique]
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return
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build = self.builds.get(job.unique)
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if build:
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if not build.canceled:
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if result is None:
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data = getJobData(job)
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result = data.get('result')
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if result is None:
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build.retry = True
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self.log.info("Build %s complete, result %s" %
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(job, result))
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build.result = result
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self.sched.onBuildCompleted(build)
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# The test suite expects the build to be removed from the
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# internal dict after it's added to the report queue.
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del self.builds[job.unique]
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else:
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if not job.name.startswith("stop:"):
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self.log.error("Unable to find build %s" % job.unique)
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def onWorkStatus(self, job):
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data = getJobData(job)
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self.log.debug("Build %s update %s " % (job, data))
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build = self.builds.get(job.unique)
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if build:
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self.log.debug("Found build %s" % build)
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# Allow URL to be updated
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build.url = data.get('url') or build.url
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if build.number is None:
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self.log.info("Build %s started" % job)
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build.number = data.get('number')
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build.__gearman_manager = data.get('manager')
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self.sched.onBuildStarted(build)
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if job.denominator:
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build.estimated_time = float(job.denominator) / 1000
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else:
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self.log.error("Unable to find build %s" % job.unique)
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def onDisconnect(self, job):
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self.log.info("Gearman job %s lost due to disconnect" % job)
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self.onBuildCompleted(job, 'LOST')
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def onUnknownJob(self, job):
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self.log.info("Gearman job %s lost due to unknown handle" % job)
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self.onBuildCompleted(job, 'LOST')
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def cancelJobInQueue(self, build):
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job = build.__gearman_job
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req = gear.CancelJobAdminRequest(job.handle)
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job.connection.sendAdminRequest(req)
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self.log.debug("Response to cancel build %s request: %s" %
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(build, req.response.strip()))
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if req.response.startswith("OK"):
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try:
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del self.builds[job.unique]
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except:
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pass
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return True
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return False
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def cancelRunningBuild(self, build):
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stop_uuid = str(uuid4().hex)
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data = dict(name=build.job.name,
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number=build.number)
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stop_job = gear.Job("stop:%s" % build.__gearman_manager,
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json.dumps(data), unique=stop_uuid)
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self.meta_jobs[stop_uuid] = stop_job
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self.log.debug("Submitting stop job: %s", stop_job)
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self.gearman.submitJob(stop_job, precedence=gear.PRECEDENCE_HIGH)
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return True
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def setBuildDescription(self, build, desc):
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try:
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name = "set_description:%s" % build.__gearman_manager
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except AttributeError:
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# We haven't yet received the first data packet that tells
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# us where the job is running.
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return False
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if not self.isJobRegistered(name):
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return False
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desc_uuid = str(uuid4().hex)
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data = dict(name=build.job.name,
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number=build.number,
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html_description=desc)
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desc_job = gear.Job(name, json.dumps(data), unique=desc_uuid)
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self.meta_jobs[desc_uuid] = desc_job
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self.log.debug("Submitting describe job: %s", desc_job)
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self.gearman.submitJob(desc_job, precedence=gear.PRECEDENCE_LOW)
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return True
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def lookForLostBuilds(self):
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self.log.debug("Looking for lost builds")
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for build in self.builds.values():
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if build.result:
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# The build has finished, it will be removed
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continue
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job = build.__gearman_job
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if not job.handle:
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# The build hasn't been enqueued yet
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continue
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p = gear.Packet(gear.constants.REQ, gear.constants.GET_STATUS,
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job.handle)
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job.connection.sendPacket(p)
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