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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:59:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:59:48 +0000 |
commit | 3b9b6d0b8e7f798023c9d109c490449d528fde80 (patch) | |
tree | 2e1c188dd7b8d7475cd163de9ae02c428343669b /bin/tests/system/doth/stress_http_quota.py | |
parent | Initial commit. (diff) | |
download | bind9-0cd617f6bad00b68e380aeb0024ef4dc1985191c.tar.xz bind9-0cd617f6bad00b68e380aeb0024ef4dc1985191c.zip |
Adding upstream version 1:9.18.19.upstream/1%9.18.19upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rwxr-xr-x | bin/tests/system/doth/stress_http_quota.py | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/bin/tests/system/doth/stress_http_quota.py b/bin/tests/system/doth/stress_http_quota.py new file mode 100755 index 0000000..12e29c8 --- /dev/null +++ b/bin/tests/system/doth/stress_http_quota.py @@ -0,0 +1,252 @@ +#!/usr/bin/env python + +# Copyright (C) Internet Systems Consortium, Inc. ("ISC") +# +# SPDX-License-Identifier: MPL-2.0 +# +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, you can obtain one at https://mozilla.org/MPL/2.0/. +# +# See the COPYRIGHT file distributed with this work for additional +# information regarding copyright ownership. + +import os +import sys +import socket +import subprocess +import random +import time + +from functools import reduce +from resource import getrlimit +from resource import setrlimit +from resource import RLIMIT_NOFILE + +MULTIDIG_INSTANCES = 10 +CONNECT_TRIES = 5 + +random.seed() + +# Ensure we have enough file desriptors to work +rlimit_nofile = getrlimit(RLIMIT_NOFILE) +if rlimit_nofile[0] < 1024: + setrlimit(RLIMIT_NOFILE, (1024, rlimit_nofile[1])) + + +# Introduce some random delay +def jitter(): + time.sleep((500 + random.randint(0, 250)) / 1000000.0) + + +# A set of simple procedures to get the test's configuration options +def get_http_port(http_secure=False): + http_port_env = None + if http_secure: + http_port_env = os.getenv("HTTPSPORT") + else: + http_port_env = os.getenv("HTTPPORT") + if http_port_env: + return int(http_port_env) + return 443 + + +def get_http_host(): + bind_host = os.getenv("BINDHOST") + if bind_host: + return bind_host + return "localhost" + + +def get_dig_path(): + dig_path = os.getenv("DIG") + if dig_path: + return dig_path + return "dig" + + +# A simple class which creates the given number of TCP connections to +# the given host in order to stress the BIND's quota facility +class TCPConnector: + def __init__(self, host, port): + self.host = host + self.port = port + self.connections = [] + + def connect_one(self): + tries = CONNECT_TRIES + while tries > 0: + try: + sock = socket.create_connection( + address=(self.host, self.port), timeout=None + ) + self.connections.append(sock) + break + except ConnectionResetError: + # some jitter for BSDs + jitter() + continue + except TimeoutError: + jitter() + continue + finally: + tries -= 1 + + # Close an established connection (randomly) + def disconnect_random(self): + pos = random.randint(0, len(self.connections) - 1) + conn = self.connections[pos] + try: + conn.shutdown(socket.SHUT_RDWR) + conn.close() + except OSError: + conn.close() + finally: + self.connections.remove(conn) + + def disconnect_all(self): + while len(self.connections) != 0: + self.disconnect_random() + + +# A simple class which allows running a dig instance under control of +# the process +class SubDIG: + def __init__(self, http_secure=None, extra_args=None): + self.sub_process = None + self.dig_path = get_dig_path() + self.host = get_http_host() + self.port = get_http_port(http_secure=http_secure) + if http_secure: + self.http_secure = True + else: + self.http_secure = False + self.extra_args = extra_args + + # This method constructs a command string + def get_command(self): + command = self.dig_path + " -p " + str(self.port) + " " + command = command + "+noadd +nosea +nostat +noquest +nocmd +time=30 " + if self.http_secure: + command = command + "+https " + else: + command = command + "+http-plain " + command = command + "@" + self.host + " " + if self.extra_args: + command = command + self.extra_args + return command + + def run(self): + # pylint: disable=consider-using-with + with open(os.devnull, "w", encoding="utf-8") as devnull: + self.sub_process = subprocess.Popen( + self.get_command(), shell=True, stdout=devnull + ) + + def wait(self, timeout=None): + res = None + if timeout is None: + return self.sub_process.wait() + try: + res = self.sub_process.wait(timeout=timeout) + except subprocess.TimeoutExpired: + return None + return res + + def alive(self): + return self.sub_process.poll() is None + + +# A simple wrapper class which allows running multiple dig instances +# and examining their statuses in one logical operation. +class MultiDIG: + def __init__(self, numdigs, http_secure=None, extra_args=None): + assert int(numdigs) > 0 + digs = [] + for _ in range(1, int(numdigs) + 1): + digs.append(SubDIG(http_secure=http_secure, extra_args=extra_args)) + self.digs = digs + assert len(self.digs) == int(numdigs) + + def run(self): + for p in self.digs: + p.run() + + def wait(self): + return map(lambda p: (p.wait()), self.digs) + + # Wait for the all instances to terminate with expected given + # status. Returns true or false. + def wait_for_result(self, result): + return reduce( + lambda a, b: ((a == result or a is True) and b == result), self.wait() + ) + + def alive(self): + return reduce(lambda a, b: (a and b), map(lambda p: (p.alive()), self.digs)) + + def completed(self): + total = 0 + for p in self.digs: + if not p.alive(): + total += 1 + return total + + +# The test's main logic +def run_test(http_secure=True): + query_args = "SOA ." + # Let's try to make a successful query + subdig = SubDIG(http_secure=http_secure, extra_args=query_args) + subdig.run() + assert subdig.wait() == 0, "DIG was expected to succeed" + # Let's create a lot of TCP connections to the server stress the + # HTTP quota + connector = TCPConnector(get_http_host(), get_http_port(http_secure=http_secure)) + # Let's make queries until the quota kicks in + subdig = SubDIG(http_secure=http_secure, extra_args=query_args) + subdig.run() + while True: + connector.connect_one() + subdig = SubDIG(http_secure=http_secure, extra_args=query_args) + subdig.run() + if subdig.wait(timeout=5) is None: + break + + # At this point quota has kicked in. Additionally, let's create a + # bunch of dig processes all trying to make a query against the + # server with exceeded quota + multidig = MultiDIG( + MULTIDIG_INSTANCES, http_secure=http_secure, extra_args=query_args + ) + multidig.run() + # Wait for the dig instance to complete. Not a single instance has + # a chance to complete successfully because of the exceeded quota + assert ( + subdig.wait(timeout=5) is None + ), "The single DIG instance has stopped prematurely" + assert subdig.alive(), "The single DIG instance is expected to be alive" + assert multidig.alive(), ( + "The DIG instances from the set are all expected to " + "be alive, but {} of them have completed" + ).format(multidig.completed()) + # Let's close opened connections (in random order) to let all dig + # processes to complete + connector.disconnect_all() + # Wait for all processes to complete successfully + assert subdig.wait() == 0, "Single DIG instance failed" + assert ( + multidig.wait_for_result(0) is True + ), "One or more of DIG instances returned unexpected results" + + +def main(): + run_test(http_secure=True) + run_test(http_secure=False) + # If we have reached this point we could safely return 0 + # (success). If the test fails because of an assert, the whole + # program will return non-zero exit code and produce the backtrace + return 0 + + +sys.exit(main()) |