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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
import os
import sys
import atexit
import daemon
import logging
import time
import threading
from lockfile import LockFailed, LockTimeout
# pylint: disable=E0611
try:
from daemon.pidfile import TimeoutPIDLockFile
except ImportError:
from daemon.pidlockfile import TimeoutPIDLockFile
# pylint: enable=E0611
import Bcfg2.Logger
import Bcfg2.Options
from Bcfg2.Reporting.Transport.base import TransportError
from Bcfg2.Reporting.Transport.DirectStore import DirectStore
from Bcfg2.Reporting.Storage.base import StorageError
class ReportingError(Exception):
"""Generic reporting exception"""
pass
class ReportingStoreThread(threading.Thread):
"""Thread for calling the storage backend"""
def __init__(self, interaction, storage, group=None, target=None,
name=None, semaphore=None, args=(), kwargs=None):
"""Initialize the thread with a reference to the interaction
as well as the storage engine to use"""
threading.Thread.__init__(self, group, target, name, args,
kwargs or dict())
self.interaction = interaction
self.storage = storage
self.logger = logging.getLogger('bcfg2-report-collector')
self.semaphore = semaphore
def run(self):
"""Call the database storage procedure (aka import)"""
try:
try:
start = time.time()
self.storage.import_interaction(self.interaction)
self.logger.info("Imported interaction for %s in %ss" %
(self.interaction.get('hostname',
'<unknown>'),
time.time() - start))
except:
#TODO requeue?
self.logger.error("Unhandled exception in import thread %s" %
sys.exc_info()[1])
finally:
if self.semaphore:
self.semaphore.release()
class ReportingCollector(object):
"""The collecting process for reports"""
options = [Bcfg2.Options.Common.reporting_storage,
Bcfg2.Options.Common.reporting_transport,
Bcfg2.Options.Common.daemon,
Bcfg2.Options.Option(
'--max-children', dest="children",
cf=('reporting', 'max_children'), type=int,
default=0,
help='Maximum number of children for the reporting collector')]
def __init__(self):
"""Setup the collector. This may be called by the daemon or though
bcfg2-admin"""
self.terminate = None
self.context = None
self.children = []
self.cleanup_threshold = 25
if Bcfg2.Options.setup.children > 0:
self.semaphore = threading.Semaphore(
value=Bcfg2.Options.setup.children)
if Bcfg2.Options.setup.debug:
level = logging.DEBUG
elif Bcfg2.Options.setup.verbose:
level = logging.INFO
else:
level = logging.WARNING
Bcfg2.Logger.setup_logging()
self.logger = logging.getLogger('bcfg2-report-collector')
try:
self.transport = Bcfg2.Options.setup.reporting_transport()
self.storage = Bcfg2.Options.setup.reporting_storage()
except TransportError:
self.logger.error("Failed to load transport: %s" %
sys.exc_info()[1])
raise ReportingError
except StorageError:
self.logger.error("Failed to load storage: %s" %
sys.exc_info()[1])
raise ReportingError
if isinstance(self.transport, DirectStore):
self.logger.error("DirectStore cannot be used with the collector. "
"Use LocalFilesystem instead")
self.shutdown()
raise ReportingError
try:
self.logger.debug("Validating storage %s" %
self.storage.__class__.__name__)
self.storage.validate()
except:
self.logger.error("Storage backed %s failed to validate: %s" %
(self.storage.__class__.__name__,
sys.exc_info()[1]))
def run(self):
"""Startup the processing and go!"""
self.terminate = threading.Event()
atexit.register(self.shutdown)
self.context = daemon.DaemonContext(detach_process=True)
iter = 0
if Bcfg2.Options.setup.daemon:
self.logger.debug("Daemonizing")
self.context.pidfile = TimeoutPIDLockFile(
Bcfg2.Options.setup.daemon, acquire_timeout=5)
# Attempt to ensure lockfile is able to be created and not stale
try:
self.context.pidfile.acquire()
except LockFailed:
self.logger.error("Failed to daemonize: %s" %
sys.exc_info()[1])
self.shutdown()
return
except LockTimeout:
try: # attempt to break the lock
os.kill(self.context.pidfile.read_pid(), 0)
except (OSError, TypeError): # No process with locked PID
self.context.pidfile.break_lock()
else:
self.logger.error("Failed to daemonize: "
"Failed to acquire lock on %s" %
Bcfg2.Options.setup.daemon)
self.shutdown()
return
else:
self.context.pidfile.release()
self.context.open()
self.logger.info("Starting daemon")
self.transport.start_monitor(self)
while not self.terminate.isSet():
try:
interaction = self.transport.fetch()
if not interaction:
continue
if Bcfg2.Options.setup.children > 0:
self.semaphore.acquire()
store_thread = ReportingStoreThread(interaction, self.storage,
semaphore=self.semaphore)
store_thread.start()
self.children.append(store_thread)
iter += 1
if iter >= self.cleanup_threshold:
self.reap_children()
iter = 0
except (SystemExit, KeyboardInterrupt):
self.logger.info("Shutting down")
self.shutdown()
except:
self.logger.error("Unhandled exception in main loop %s" %
sys.exc_info()[1])
def shutdown(self):
"""Cleanup and go"""
if self.terminate:
# this wil be missing if called from bcfg2-admin
self.terminate.set()
if self.transport:
try:
self.transport.shutdown()
except OSError:
pass
if self.storage:
self.storage.shutdown()
def reap_children(self):
"""Join any non-live threads"""
newlist = []
self.logger.debug("Starting reap_children")
for child in self.children:
if child.isAlive():
newlist.append(child)
else:
child.join()
self.logger.debug("Joined child thread %s" % child.getName())
self.children = newlist
|
