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#!/usr/bin/python2
#
# Copyright 2013 Rackspace Australia
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import logging
import os
import threading
import yaml
import worker_manager
from os.path import join, isdir, isfile
class Server(threading.Thread):
""" This is the worker server object to be daemonized """
log = logging.getLogger("worker_server.Server")
def __init__(self, config):
super(Server, self).__init__()
self._stop = threading.Event()
self.config = config
# Load extra configuration first
# NOTE(Mattoliverau): debug_log might be specified in
# a conf.d snippet.
if 'conf_d' in self.config:
self.load_extra_configuration()
# Python logging output file.
self.debug_log = self.config['debug_log']
self.setup_logging(self.debug_log)
# Config init
self.zuul_manager = None
self.zuul_client = None
self.services_started = False
# TODO: Make me unique (random?) and we should be able to run multiple
# instances of turbo-hipster on the one host
self.worker_name = os.uname()[1]
self.jobs = {}
self.load_jobs()
def load_extra_configuration(self):
if isdir(self.config["conf_d"]):
extra_configs = (join(self.config["conf_d"], item)
for item in os.listdir(self.config["conf_d"])
if isfile(join(self.config["conf_d"], item)))
for conf in extra_configs:
try:
with open(conf, 'r') as config_stream:
extra_config = yaml.safe_load(config_stream)
self.config.update(extra_config)
except:
self.log.warn("Failed to load extra configuration: '%s'" %
(conf))
continue
else:
self.log.warn("conf_d parameter '%s' isn't a directory" %
(self.config["conf_d"]))
def setup_logging(self, log_file=None):
if log_file:
if not os.path.isdir(os.path.dirname(log_file)):
os.makedirs(os.path.dirname(log_file))
logging.basicConfig(format='%(asctime)s %(name)-32s '
'%(levelname)-8s %(message)s',
filename=log_file,
level=logging.DEBUG)
def load_jobs(self):
# Legacy, load the plugins first
self.load_plugins()
self.log.debug("Loading jobs")
if 'jobs' in self.config:
for job in self.config['jobs']:
try:
plugin = 'shell_script'
if 'plugin' in job:
plugin = job['plugin']
module = __import__('turbo_hipster.task_plugins.' +
plugin + '.task',
fromlist='turbo_hipster.task_plugins' +
plugin)
self.jobs[job['name']] = {
'name': job['name'],
'plugin': plugin,
'job_config': job,
'runner': module.Runner(self, job['name'], job),
}
self.log.debug('Job %s loaded' % job['name'])
except Exception as e:
self.log.exception("Failure loading job")
self.log.exception(e)
def load_plugins(self):
""" Load the available plugins from task_plugins """
self.log.debug('Loading plugins')
# Load plugins
if 'plugins' in self.config:
for plugin in self.config['plugins']:
try:
if plugin['pythonpath'] not in sys.path:
sys.path.append(plugin['pythonpath'])
module = __import__('turbo_hipster.task_plugins.' +
plugin['name'] + '.task',
fromlist='turbo_hipster.task_plugins' +
plugin['name'])
self.jobs[plugin['function']] = {
'name': plugin['function'],
'plugin': plugin['name'],
'plugin_config': plugin,
'runner': module.Runner(
self, plugin['function'], plugin
),
}
self.log.debug('Job %s loaded' % plugin['function'])
except Exception as e:
self.log.exception("Failure loading plugin")
self.log.exception(e)
def start_zuul_client(self):
""" Run the tasks """
self.log.debug('Starting zuul client')
self.zuul_client = worker_manager.ZuulClient(self)
for job in self.jobs.values():
self.zuul_client.add_function(job['name'], job['runner'])
self.zuul_client.start()
def start_zuul_manager(self):
self.zuul_manager = worker_manager.ZuulManager(self, self.jobs)
self.zuul_manager.start()
def shutdown_gracefully(self):
""" Shutdown while no work is currently happening """
self.log.debug('Graceful shutdown once jobs are complete...')
thread = threading.Thread(target=self._shutdown_gracefully)
thread.start()
def _shutdown_gracefully(self):
self.zuul_client.stop_gracefully()
self.zuul_manager.stop_gracefully()
self._stop.set()
def shutdown(self):
self.log.debug('Shutting down now!...')
self.zuul_client.stop()
self.zuul_manager.stop()
self._stop.set()
def stopped(self):
return self._stop.isSet()
def run(self):
self.start_zuul_client()
self.start_zuul_manager()
self.services_started = True
while not self.stopped():
self._stop.wait()
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