/
worker.py
243 lines (206 loc) · 7.54 KB
/
worker.py
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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
import asyncio
import logging
import os
import signal
import sys
import traceback
from gunicorn.workers import base # type: ignore
from sanic.compat import UVLOOP_INSTALLED
from sanic.log import logger
from sanic.server import HttpProtocol, Signal, serve, try_use_uvloop
from sanic.server.protocols.websocket_protocol import WebSocketProtocol
try:
import ssl # type: ignore
except ImportError:
ssl = None # type: ignore
if UVLOOP_INSTALLED:
try_use_uvloop()
class GunicornWorker(base.Worker):
http_protocol = HttpProtocol
websocket_protocol = WebSocketProtocol
def __init__(self, *args, **kw): # pragma: no cover
super().__init__(*args, **kw)
cfg = self.cfg
if cfg.is_ssl:
self.ssl_context = self._create_ssl_context(cfg)
else:
self.ssl_context = None
self.servers = {}
self.connections = set()
self.exit_code = 0
self.signal = Signal()
def init_process(self):
# create new event_loop after fork
asyncio.get_event_loop().close()
self.loop = asyncio.new_event_loop()
asyncio.set_event_loop(self.loop)
super().init_process()
def run(self):
is_debug = self.log.loglevel == logging.DEBUG
protocol = (
self.websocket_protocol
if self.app.callable.websocket_enabled
else self.http_protocol
)
self._server_settings = self.app.callable._helper(
loop=self.loop,
debug=is_debug,
protocol=protocol,
ssl=self.ssl_context,
run_async=True,
)
self._server_settings["signal"] = self.signal
self._server_settings.pop("sock")
self._await(self.app.callable._startup())
self._await(
self.app.callable._server_event("init", "before", loop=self.loop)
)
main_start = self._server_settings.pop("main_start", None)
main_stop = self._server_settings.pop("main_stop", None)
if main_start or main_stop: # noqa
logger.warning(
"Listener events for the main process are not available "
"with GunicornWorker"
)
try:
self._await(self._run())
self.app.callable.is_running = True
self._await(
self.app.callable._server_event(
"init", "after", loop=self.loop
)
)
self.loop.run_until_complete(self._check_alive())
self._await(
self.app.callable._server_event(
"shutdown", "before", loop=self.loop
)
)
self.loop.run_until_complete(self.close())
except BaseException:
traceback.print_exc()
finally:
try:
self._await(
self.app.callable._server_event(
"shutdown", "after", loop=self.loop
)
)
except BaseException:
traceback.print_exc()
finally:
self.loop.close()
sys.exit(self.exit_code)
async def close(self):
if self.servers:
# stop accepting connections
self.log.info(
"Stopping server: %s, connections: %s",
self.pid,
len(self.connections),
)
for server in self.servers:
server.close()
await server.wait_closed()
self.servers.clear()
# prepare connections for closing
self.signal.stopped = True
for conn in self.connections:
conn.close_if_idle()
# gracefully shutdown timeout
start_shutdown = 0
graceful_shutdown_timeout = self.cfg.graceful_timeout
while self.connections and (
start_shutdown < graceful_shutdown_timeout
):
await asyncio.sleep(0.1)
start_shutdown = start_shutdown + 0.1
# Force close non-idle connection after waiting for
# graceful_shutdown_timeout
for conn in self.connections:
if hasattr(conn, "websocket") and conn.websocket:
conn.websocket.fail_connection(code=1001)
else:
conn.abort()
async def _run(self):
for sock in self.sockets:
state = dict(requests_count=0)
self._server_settings["host"] = None
self._server_settings["port"] = None
server = await serve(
sock=sock,
connections=self.connections,
state=state,
**self._server_settings
)
self.servers[server] = state
async def _check_alive(self):
# If our parent changed then we shut down.
pid = os.getpid()
try:
while self.alive:
self.notify()
req_count = sum(
self.servers[srv]["requests_count"] for srv in self.servers
)
if self.max_requests and req_count > self.max_requests:
self.alive = False
self.log.info(
"Max requests exceeded, shutting down: %s", self
)
elif pid == os.getpid() and self.ppid != os.getppid():
self.alive = False
self.log.info("Parent changed, shutting down: %s", self)
else:
await asyncio.sleep(1.0, loop=self.loop)
except (Exception, BaseException, GeneratorExit, KeyboardInterrupt):
pass
@staticmethod
def _create_ssl_context(cfg):
"""Creates SSLContext instance for usage in asyncio.create_server.
See ssl.SSLSocket.__init__ for more details.
"""
ctx = ssl.SSLContext(cfg.ssl_version)
ctx.load_cert_chain(cfg.certfile, cfg.keyfile)
ctx.verify_mode = cfg.cert_reqs
if cfg.ca_certs:
ctx.load_verify_locations(cfg.ca_certs)
if cfg.ciphers:
ctx.set_ciphers(cfg.ciphers)
return ctx
def init_signals(self):
# Set up signals through the event loop API.
self.loop.add_signal_handler(
signal.SIGQUIT, self.handle_quit, signal.SIGQUIT, None
)
self.loop.add_signal_handler(
signal.SIGTERM, self.handle_exit, signal.SIGTERM, None
)
self.loop.add_signal_handler(
signal.SIGINT, self.handle_quit, signal.SIGINT, None
)
self.loop.add_signal_handler(
signal.SIGWINCH, self.handle_winch, signal.SIGWINCH, None
)
self.loop.add_signal_handler(
signal.SIGUSR1, self.handle_usr1, signal.SIGUSR1, None
)
self.loop.add_signal_handler(
signal.SIGABRT, self.handle_abort, signal.SIGABRT, None
)
# Don't let SIGTERM and SIGUSR1 disturb active requests
# by interrupting system calls
signal.siginterrupt(signal.SIGTERM, False)
signal.siginterrupt(signal.SIGUSR1, False)
def handle_quit(self, sig, frame):
self.alive = False
self.app.callable.is_running = False
self.cfg.worker_int(self)
def handle_abort(self, sig, frame):
self.alive = False
self.exit_code = 1
self.cfg.worker_abort(self)
sys.exit(1)
def _await(self, coro):
fut = asyncio.ensure_future(coro, loop=self.loop)
self.loop.run_until_complete(fut)