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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 07:24:22 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 07:24:22 +0000 |
commit | 45d6379135504814ab723b57f0eb8be23393a51d (patch) | |
tree | d4f2ec4acca824a8446387a758b0ce4238a4dffa /bin/tests/system/addzone/tests_rndc_deadlock.py | |
parent | Initial commit. (diff) | |
download | bind9-upstream.tar.xz bind9-upstream.zip |
Adding upstream version 1:9.16.44.upstream/1%9.16.44upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'bin/tests/system/addzone/tests_rndc_deadlock.py')
-rwxr-xr-x | bin/tests/system/addzone/tests_rndc_deadlock.py | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/bin/tests/system/addzone/tests_rndc_deadlock.py b/bin/tests/system/addzone/tests_rndc_deadlock.py new file mode 100755 index 0000000..7f4bf63 --- /dev/null +++ b/bin/tests/system/addzone/tests_rndc_deadlock.py @@ -0,0 +1,92 @@ +# 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 concurrent.futures +import os +import subprocess +import time + + +def run_rndc(server, rndc_command): + """ + Send the specified 'rndc_command' to 'server' with a timeout of 10 seconds + """ + rndc = os.getenv("RNDC") + port = os.getenv("CONTROLPORT") + + cmdline = [rndc, "-c", "../common/rndc.conf", "-p", port, "-s", server] + cmdline.extend(rndc_command) + + subprocess.check_output(cmdline, stderr=subprocess.STDOUT, timeout=10) + + +def rndc_loop(test_state, domain): + """ + Run "rndc addzone", "rndc modzone", and "rndc delzone" in a tight loop + until the test is considered finished, ignoring errors + """ + rndc_commands = [ + ["addzone", domain, '{ type master; file "example.db"; };'], + [ + "modzone", + domain, + '{ type master; file "example.db"; allow-transfer { any; }; };', + ], + ["delzone", domain], + ] + + while not test_state["finished"]: + for command in rndc_commands: + try: + run_rndc("10.53.0.3", command) + except subprocess.SubprocessError: + pass + + +def check_if_server_is_responsive(): + """ + Check if server status can be successfully retrieved using "rndc status" + """ + try: + run_rndc("10.53.0.3", ["status"]) + return True + except subprocess.SubprocessError: + return False + + +def test_rndc_deadlock(): + """ + Test whether running "rndc addzone", "rndc modzone", and "rndc delzone" + commands concurrently does not trigger a deadlock + """ + test_state = {"finished": False} + + # Create 4 worker threads running "rndc" commands in a loop. + with concurrent.futures.ThreadPoolExecutor() as executor: + for i in range(1, 5): + domain = "example%d" % i + executor.submit(rndc_loop, test_state, domain) + + # Run "rndc status" 10 times, with 1-second pauses between attempts. + # Each "rndc status" invocation has a timeout of 10 seconds. If any of + # them fails, the loop will be interrupted. + server_is_responsive = True + attempts = 10 + while server_is_responsive and attempts > 0: + server_is_responsive = check_if_server_is_responsive() + attempts -= 1 + time.sleep(1) + + # Signal worker threads that the test is finished. + test_state["finished"] = True + + # Check whether all "rndc status" commands succeeded. + assert server_is_responsive |