1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
#!/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 sys
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.plugins = []
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.tasks = {}
self.load_plugins()
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_plugins(self):
""" Load the available plugins from task_plugins """
self.log.debug('Loading plugins')
# Load plugins
for plugin in self.config['plugins']:
if plugin['location'] not in sys.path:
sys.path.append(plugin['location'])
self.plugins.append({
'module': __import__(plugin['import-path'],
fromlist='.'.join(plugin['import-path'].split('.')[:-1])),
'plugin_config': plugin
})
self.log.debug('Plugin %s loaded' % plugin['name'])
def start_zuul_client(self):
""" Run the tasks """
self.log.debug('Starting zuul client')
self.zuul_client = worker_manager.ZuulClient(self)
for task_number, plugin in enumerate(self.plugins):
module = plugin['module']
job_name = '%s-%s-%s' % (plugin['plugin_config']['name'],
self.worker_name, task_number)
self.tasks[job_name] = module.Runner(
self,
plugin['plugin_config'],
job_name
)
self.zuul_client.add_function(plugin['plugin_config']['function'],
self.tasks[job_name])
self.zuul_client.start()
def start_zuul_manager(self):
self.zuul_manager = worker_manager.ZuulManager(self, self.tasks)
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()
|