cloudflared-mirror/component-tests/test_termination.py

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#!/usr/bin/env python
from contextlib import contextmanager
import requests
import signal
import threading
import time
from util import start_cloudflared, wait_tunnel_ready, check_tunnel_not_connected, LOGGER
class TestTermination():
grace_period = 5
timeout = 10
extra_config = {
"grace-period": f"{grace_period}s",
}
signals = [signal.SIGTERM, signal.SIGINT]
sse_endpoint = "/sse?freq=1s"
def test_graceful_shutdown(self, tmp_path, component_tests_config):
config = component_tests_config(self.extra_config)
for sig in self.signals:
with start_cloudflared(
tmp_path, config, new_process=True, capture_output=False) as cloudflared:
wait_tunnel_ready(tunnel_url=config.get_url())
connected = threading.Condition()
in_flight_req = threading.Thread(
target=self.stream_request, args=(config, connected,))
in_flight_req.start()
with connected:
connected.wait(self.timeout)
# Send signal after the SSE connection is established
self.terminate_by_signal(cloudflared, sig)
self.wait_eyeball_thread(
in_flight_req, self.grace_period + self.timeout)
# test cloudflared terminates before grace period expires when all eyeball
# connections are drained
def test_shutdown_once_no_connection(self, tmp_path, component_tests_config):
config = component_tests_config(self.extra_config)
for sig in self.signals:
with start_cloudflared(
tmp_path, config, new_process=True, capture_output=False) as cloudflared:
wait_tunnel_ready(tunnel_url=config.get_url())
connected = threading.Condition()
in_flight_req = threading.Thread(
target=self.stream_request, args=(config, connected, True, ))
in_flight_req.start()
with self.within_grace_period():
with connected:
connected.wait(self.timeout)
# Send signal after the SSE connection is established
self.terminate_by_signal(cloudflared, sig)
self.wait_eyeball_thread(in_flight_req, self.grace_period)
def test_no_connection_shutdown(self, tmp_path, component_tests_config):
config = component_tests_config(self.extra_config)
for sig in self.signals:
with start_cloudflared(
tmp_path, config, new_process=True, capture_output=False) as cloudflared:
wait_tunnel_ready(tunnel_url=config.get_url())
with self.within_grace_period():
self.terminate_by_signal(cloudflared, sig)
def terminate_by_signal(self, cloudflared, sig):
cloudflared.send_signal(sig)
check_tunnel_not_connected()
cloudflared.wait()
def wait_eyeball_thread(self, thread, timeout):
thread.join(timeout)
assert thread.is_alive() == False, "eyeball thread is still alive"
# Using this context asserts logic within the context is executed within grace period
@contextmanager
def within_grace_period(self):
try:
start = time.time()
yield
finally:
duration = time.time() - start
assert duration < self.grace_period
def stream_request(self, config, connected, early_terminate):
expected_terminate_message = "502 Bad Gateway"
url = config.get_url() + self.sse_endpoint
with requests.get(url, timeout=5, stream=True) as resp:
with connected:
connected.notifyAll()
lines = 0
for line in resp.iter_lines():
if expected_terminate_message.encode() == line:
break
lines += 1
if early_terminate and lines == 2:
return
# /sse returns count followed by 2 new lines
assert lines >= (self.grace_period * 2)