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The artifact lists in clean.sh and extra_artifacts might be slightly different. The list was updated for each test to reflect the current state.
90 lines
2.6 KiB
Python
Executable file
90 lines
2.6 KiB
Python
Executable file
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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#
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# SPDX-License-Identifier: MPL-2.0
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, you can obtain one at https://mozilla.org/MPL/2.0/.
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#
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# See the COPYRIGHT file distributed with this work for additional
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# information regarding copyright ownership.
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import concurrent.futures
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import time
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import pytest
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import isctest
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pytestmark = pytest.mark.extra_artifacts(
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[
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"ns*/*.nzf*",
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"ns*/*.nzd*",
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"ns1/redirect.db",
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"ns2/new-zones",
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"ns2/redirect.db",
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"ns3/redirect.db",
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]
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)
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def rndc_loop(test_state, domain, ns3):
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"""
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Run "rndc addzone", "rndc modzone", and "rndc delzone" in a tight loop
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until the test is considered finished, ignoring errors
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"""
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rndc_commands = [
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["addzone", domain, '{ type primary; file "example.db"; };'],
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[
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"modzone",
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domain,
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'{ type primary; file "example.db"; allow-transfer { any; }; };',
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],
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["delzone", domain],
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]
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while not test_state["finished"]:
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for command in rndc_commands:
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ns3.rndc(" ".join(command), ignore_errors=True, log=False)
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def check_if_server_is_responsive(ns3):
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"""
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Check if server status can be successfully retrieved using "rndc status"
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"""
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try:
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ns3.rndc("status", log=False)
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return True
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except isctest.rndc.RNDCException:
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return False
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def test_rndc_deadlock(servers):
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"""
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Test whether running "rndc addzone", "rndc modzone", and "rndc delzone"
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commands concurrently does not trigger a deadlock
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"""
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test_state = {"finished": False}
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ns3 = servers["ns3"]
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# Create 4 worker threads running "rndc" commands in a loop.
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with concurrent.futures.ThreadPoolExecutor() as executor:
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for i in range(1, 5):
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domain = "example%d" % i
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executor.submit(rndc_loop, test_state, domain, ns3)
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# Run "rndc status" 10 times, with 1-second pauses between attempts.
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# Each "rndc status" invocation has a timeout of 10 seconds. If any of
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# them fails, the loop will be interrupted.
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server_is_responsive = True
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attempts = 10
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while server_is_responsive and attempts > 0:
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server_is_responsive = check_if_server_is_responsive(ns3)
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attempts -= 1
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time.sleep(1)
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# Signal worker threads that the test is finished.
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test_state["finished"] = True
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# Check whether all "rndc status" commands succeeded.
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assert server_is_responsive
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