122 lines
3.6 KiB
Python
Executable File
122 lines
3.6 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright 2023 The gRPC Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import platform
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import subprocess
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import sys
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import time
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def test_runner_log(msg):
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sys.stderr.write("\n%s: %s\n" % (__file__, msg))
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def python_args(arg_list):
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if platform.system() == "Windows" and arg_list[0].endswith(".py"):
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return [sys.executable] + arg_list
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return arg_list
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def wait_until_dns_server_is_up(args):
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for i in range(0, 30):
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test_runner_log(
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"Health check: attempt to connect to DNS server over TCP."
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)
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tcp_connect_subprocess = subprocess.Popen(
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python_args(
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[
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args.tcp_connect_bin_path,
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"--server_host",
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"127.0.0.1",
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"--server_port",
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str(args.dns_server_port),
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"--timeout",
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str(1),
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]
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)
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)
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tcp_connect_subprocess.communicate()
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if tcp_connect_subprocess.returncode == 0:
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test_runner_log(
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(
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"Health check: attempt to make an A-record "
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"query to DNS server."
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)
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)
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dns_resolver_subprocess = subprocess.Popen(
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python_args(
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[
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args.dns_resolver_bin_path,
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"--qname",
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"health-check-local-dns-server-is-alive.resolver-tests.grpctestingexp",
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"--server_host",
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"127.0.0.1",
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"--server_port",
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str(args.dns_server_port),
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]
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),
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stdout=subprocess.PIPE,
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)
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dns_resolver_stdout, _ = dns_resolver_subprocess.communicate(
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str.encode("ascii")
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)
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if dns_resolver_subprocess.returncode == 0:
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if "123.123.123.123".encode("ascii") in dns_resolver_stdout:
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test_runner_log(
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(
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"DNS server is up! "
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"Successfully reached it over UDP and TCP."
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)
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)
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return
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time.sleep(1)
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test_runner_log(
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(
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"Failed to reach DNS server over TCP and/or UDP. "
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"Exitting without running tests."
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)
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)
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sys.exit(1)
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def main():
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argp = argparse.ArgumentParser(description="Make DNS queries for A records")
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argp.add_argument(
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"-p",
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"--dns_server_port",
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default=None,
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type=int,
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help=("Port that local DNS server is listening on."),
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)
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argp.add_argument(
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"--dns_resolver_bin_path",
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default=None,
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type=str,
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help=("Path to the DNS health check utility."),
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)
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argp.add_argument(
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"--tcp_connect_bin_path",
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default=None,
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type=str,
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help=("Path to the TCP health check utility."),
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)
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args = argp.parse_args()
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wait_until_dns_server_is_up(args)
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if __name__ == "__main__":
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main()
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