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
|
#!/usr/bin/python2
# -*- coding: utf-8 -*-
#
# Copyright (c) 2016 Red Hat, Inc. <http://www.redhat.com>
# This file is part of GlusterFS.
#
# This file is licensed to you under your choice of the GNU Lesser
# General Public License, version 3 or any later version (LGPLv3 or
# later), or the GNU General Public License, version 2 (GPLv2), in all
# cases as published by the Free Software Foundation.
#
from __future__ import print_function
import sys
import signal
try:
import socketserver
except ImportError:
import SocketServer as socketserver
import socket
from argparse import ArgumentParser, RawDescriptionHelpFormatter
from eventtypes import all_events
import handlers
import utils
from eventsapiconf import SERVER_ADDRESS, PID_FILE
from eventsapiconf import AUTO_BOOL_ATTRIBUTES, AUTO_INT_ATTRIBUTES
from utils import logger, PidFile, PidFileLockFailed, boolify
class GlusterEventsRequestHandler(SocketServer.BaseRequestHandler):
def handle(self):
data = self.request[0].strip()
logger.debug("EVENT: {0} from {1}".format(repr(data),
self.client_address[0]))
try:
# Event Format <TIMESTAMP> <TYPE> <DETAIL>
ts, key, value = data.split(" ", 2)
except ValueError:
logger.warn("Invalid Event Format {0}".format(data))
return
data_dict = {}
try:
# Format key=value;key=value
data_dict = dict(x.split('=') for x in value.split(';'))
except ValueError:
logger.warn("Unable to parse Event {0}".format(data))
return
for k, v in data_dict.items():
try:
if k in AUTO_BOOL_ATTRIBUTES:
data_dict[k] = boolify(v)
if k in AUTO_INT_ATTRIBUTES:
data_dict[k] = int(v)
except ValueError:
# Auto Conversion failed, Retain the old value
continue
try:
# Event Type to Function Map, Received event data will be in
# the form <TIMESTAMP> <TYPE> <DETAIL>, Get Event name for the
# received Type/Key and construct a function name starting with
# handle_ For example: handle_event_volume_create
func_name = "handle_" + all_events[int(key)].lower()
except IndexError:
# This type of Event is not handled?
logger.warn("Unhandled Event: {0}".format(key))
func_name = None
if func_name is not None:
# Get function from handlers module
func = getattr(handlers, func_name, None)
# If func is None, then handler unimplemented for that event.
if func is not None:
func(ts, int(key), data_dict)
else:
# Generic handler, broadcast whatever received
handlers.generic_handler(ts, int(key), data_dict)
def signal_handler_sigusr2(sig, frame):
utils.load_all()
utils.restart_webhook_pool()
def init_event_server():
utils.setup_logger()
utils.load_all()
utils.init_webhook_pool()
port = utils.get_config("port")
if port is None:
sys.stderr.write("Unable to get Port details from Config\n")
sys.exit(1)
# Start the Eventing Server, UDP Server
try:
server = SocketServer.ThreadingUDPServer(
(SERVER_ADDRESS, port),
GlusterEventsRequestHandler)
except socket.error as e:
sys.stderr.write("Failed to start Eventsd: {0}\n".format(e))
sys.exit(1)
server.serve_forever()
def get_args():
parser = ArgumentParser(formatter_class=RawDescriptionHelpFormatter,
description=__doc__)
parser.add_argument("-p", "--pid-file", help="PID File",
default=PID_FILE)
return parser.parse_args()
def main():
args = get_args()
try:
with PidFile(args.pid_file):
init_event_server()
except PidFileLockFailed as e:
sys.stderr.write("Failed to get lock for pid file({0}): {1}".format(
args.pid_file, e))
except KeyboardInterrupt:
sys.exit(1)
if __name__ == "__main__":
signal.signal(signal.SIGUSR2, signal_handler_sigusr2)
main()
|
