307 lines
10 KiB
Python
307 lines
10 KiB
Python
# Copyright 2014 OpenStack Foundation
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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 json
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import logging
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import multiprocessing
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import os
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import shutil
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import socket
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import subprocess
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import tempfile
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import threading
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import traceback
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import gear
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import yaml
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import jenkins_jobs.builder
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class JobDir(object):
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def __init__(self):
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self.root = tempfile.mkdtemp()
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self.git_root = os.path.join(self.root, 'git')
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os.makedirs(self.git_root)
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self.ansible_root = os.path.join(self.root, 'ansible')
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os.makedirs(self.ansible_root)
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self.inventory = os.path.join(self.ansible_root, 'inventory')
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self.playbook = os.path.join(self.ansible_root, 'playbook')
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self.config = os.path.join(self.ansible_root, 'ansible.cfg')
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def __enter__(self):
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return self
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def __exit__(self, etype, value, tb):
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shutil.rmtree(self.root)
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class LaunchServer(object):
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log = logging.getLogger("zuul.LaunchServer")
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def __init__(self, config):
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self.config = config
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self.hostname = socket.gethostname()
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self.node_workers = {}
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self.mpmanager = multiprocessing.Manager()
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self.jobs = self.mpmanager.dict()
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def start(self):
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self._running = True
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server = self.config.get('gearman', 'server')
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if self.config.has_option('gearman', 'port'):
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port = self.config.get('gearman', 'port')
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else:
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port = 4730
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self.worker = gear.Worker('Zuul Launch Server')
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self.worker.addServer(server, port)
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self.log.debug("Waiting for server")
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self.worker.waitForServer()
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self.log.debug("Registering")
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self.register()
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self.loadJobs()
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self.log.debug("Starting worker")
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self.thread = threading.Thread(target=self.run)
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self.thread.daemon = True
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self.thread.start()
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def loadJobs(self):
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self.log.debug("Loading jobs")
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builder = JJB()
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path = self.config.get('launcher', 'jenkins_jobs')
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builder.load_files([path])
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builder.parser.expandYaml()
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unseen = set(self.jobs.keys())
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for job in builder.parser.jobs:
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self.jobs[job['name']] = job
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unseen.discard(job['name'])
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for name in unseen:
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del self.jobs[name]
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def register(self):
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self.worker.registerFunction("node-assign:zuul")
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def reconfigure(self, config):
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self.log.debug("Reconfiguring")
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self.config = config
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self.loadJobs()
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for node in self.node_workers.values():
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node.queue.put(dict(action='reconfigure'))
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def stop(self):
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self.log.debug("Stopping")
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self._running = False
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self.worker.shutdown()
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for node in self.node_workers.values():
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node.queue.put(dict(action='stop'))
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self.log.debug("Stopped")
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def join(self):
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self.thread.join()
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def run(self):
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self.log.debug("Starting launch listener")
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while self._running:
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try:
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job = self.worker.getJob()
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try:
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if job.name.startswith('node-assign:'):
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self.log.debug("Got assign-node job: %s" % job.unique)
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self.assignNode(job)
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else:
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self.log.error("Unable to handle job %s" % job.name)
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job.sendWorkFail()
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except Exception:
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self.log.exception("Exception while running job")
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job.sendWorkException(traceback.format_exc())
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except Exception:
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self.log.exception("Exception while getting job")
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def assignNode(self, job):
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args = json.loads(job.arguments)
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worker = NodeWorker(self.config, self.jobs,
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args['name'], args['host'],
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args['description'], args['labels'])
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self.node_workers[worker.name] = worker
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worker.process = multiprocessing.Process(target=worker.run)
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worker.process.start()
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data = dict(manager=self.hostname)
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job.sendWorkData(json.dumps(data))
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job.sendWorkComplete()
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class NodeWorker(object):
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log = logging.getLogger("zuul.NodeWorker")
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def __init__(self, config, jobs, name, host, description, labels):
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self.config = config
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self.jobs = jobs
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self.name = name
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self.host = host
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self.description = description
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if not isinstance(labels, list):
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labels = [labels]
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self.labels = labels
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self.registered_functions = set()
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self._running = True
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self.queue = multiprocessing.Queue()
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def run(self):
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self._running_job = False
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server = self.config.get('gearman', 'server')
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if self.config.has_option('gearman', 'port'):
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port = self.config.get('gearman', 'port')
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else:
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port = 4730
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self.worker = gear.Worker(self.name)
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self.worker.addServer(server, port)
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self.log.debug("Waiting for server")
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self.worker.waitForServer()
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self.register()
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self.gearman_thread = threading.Thread(target=self.run_gearman)
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self.gearman_thread.daemon = True
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self.gearman_thread.start()
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while self._running:
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try:
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self._run_queue()
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except Exception:
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self.log.exception("Exception in queue manager:")
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def _run_queue(self):
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item = self.queue.get()
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if item['action'] == 'stop':
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self._running = False
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self.worker.shutdown()
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elif item['action'] == 'reconfigure':
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self.register()
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def run_gearman(self):
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while self._running:
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try:
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self._run_gearman()
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except Exception:
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self.log.exception("Exception in gearman manager:")
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def _run_gearman(self):
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job = self.worker.getJob()
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try:
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if job.name not in self.registered_functions:
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self.log.error("Unable to handle job %s" % job.name)
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job.sendWorkFail()
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return
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self.launch(job)
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except Exception:
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self.log.exception("Exception while running job")
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job.sendWorkException(traceback.format_exc())
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def generateFunctionNames(self, job):
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# This only supports "node: foo" and "node: foo || bar"
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ret = set()
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job_labels = job.get('node')
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matching_labels = set()
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if job_labels:
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job_labels = [x.strip() for x in job_labels.split('||')]
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matching_labels = set(self.labels) & set(job_labels)
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if not matching_labels:
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return ret
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ret.add('build:%s' % (job['name'],))
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for label in matching_labels:
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ret.add('build:%s:%s' % (job['name'], label))
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return ret
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def register(self):
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if self._running_job:
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return
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new_functions = set()
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for job in self.jobs.values():
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new_functions |= self.generateFunctionNames(job)
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for function in new_functions - self.registered_functions:
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self.worker.registerFunction(function)
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for function in self.registered_functions - new_functions:
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self.worker.unRegisterFunction(function)
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self.registered_functions = new_functions
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def launch(self, job):
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self._running_job = True
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thread = threading.Thread(target=self._launch, args=(job,))
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thread.start()
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def _launch(self, job):
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self.log.debug("Job %s: beginning" % (job.unique,))
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return # TODO
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with JobDir() as jobdir:
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self.log.debug("Job %s: job root at %s" %
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(job.unique, jobdir.root))
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args = json.loads(job.arguments)
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self.prepareAnsibleFiles(jobdir, args)
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result = self.runAnsible(jobdir)
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data = {
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'url': 'https://server/job',
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'number': 1
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}
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job.sendWorkData(json.dumps(data))
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job.sendWorkStatus(0, 100)
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result = dict(result=result)
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job.sendWorkComplete(json.dumps(result))
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def getHostList(self, args):
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# TODOv3: This should get the appropriate nodes from nodepool,
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# or in the unit tests, be overriden to return localhost.
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return [('localhost', dict(ansible_connection='local'))]
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def prepareAnsibleFiles(self, jobdir, args):
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with open(jobdir.inventory, 'w') as inventory:
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for host_name, host_vars in self.getHostList(args):
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inventory.write(host_name)
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inventory.write(' ')
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for k, v in host_vars.items():
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inventory.write('%s=%s' % (k, v))
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inventory.write('\n')
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with open(jobdir.playbook, 'w') as playbook:
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play = dict(hosts='localhost',
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tasks=[dict(name='test',
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shell='echo Hello world')])
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playbook.write(yaml.dump([play]))
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with open(jobdir.config, 'w') as config:
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config.write('[defaults]\n')
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config.write('hostfile = %s\n' % jobdir.inventory)
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def runAnsible(self, jobdir):
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proc = subprocess.Popen(
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['ansible-playbook', jobdir.playbook],
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cwd=jobdir.ansible_root,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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)
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(out, err) = proc.communicate()
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ret = proc.wait()
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print out
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print err
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if ret == 0:
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return 'SUCCESS'
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else:
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return 'FAILURE'
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class JJB(jenkins_jobs.builder.Builder):
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def __init__(self):
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self.global_config = None
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self._plugins_list = []
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