예제 #1
0
    def test_4_authkey(self):
        logging.debug('')
        logging.debug('test_authkey')

        factory = self.start_factory()

        # Start server in non-public-key mode.
        # Connections must have matching authkey,
        # but data is sent in the clear!?
        # This is standard multiprocessing behaviour.
        authkey = 'password'
        server_dir = 'Factory_authkey'
        if os.path.exists(server_dir):
            shutil.rmtree(server_dir)
        os.mkdir(server_dir)
        os.chdir(server_dir)
        self.server_dirs.append(server_dir)
        try:
            logging.debug('starting server (authkey %s)...', authkey)
            allowed_types = ['openmdao.main.test.test_distsim.Box']
            server = start_server(authkey=authkey, allowed_types=allowed_types,
                                  timeout=30)
            address, port, key = read_server_config('server.cfg')
            logging.debug('server address: %s', address)
            logging.debug('server port: %s', port)
            logging.debug('server key: %s', key)
        finally:
            os.chdir('..')

        factory = None
        try:
            assert_raises(self, 'connect(address, port, pubkey=key)',
                          globals(), locals(), AuthenticationError,
                          'digest sent was rejected')

            factory = connect(address, port, authkey=authkey)
            logging.debug('factory: %r', factory)

            # Create model and run it.
            box = factory.create(_MODULE+'.Box')
            model = set_as_top(Model(box))
            model.run()

            # Check results.
            for width in range(1, 2):
                for height in range(1, 3):
                    for depth in range(1, 4):
                        case = model.driver.recorder.cases.pop(0)
                        self.assertEqual(case.outputs[0][2], width*height*depth)
        finally:
            if factory is not None:
                factory.cleanup()
            logging.debug('terminating server (authkey %s) pid %s',
                          authkey, server.pid)
            server.terminate(timeout=10)
            server = None
예제 #2
0
    def start_factory(self, port=None, allowed_users=None):
        """ Start each factory process in a unique directory. """
        global _SERVER_ID
        _SERVER_ID += 1

        server_dir = 'Factory_%d' % _SERVER_ID
        if os.path.exists(server_dir):
            shutil.rmtree(server_dir)
        os.mkdir(server_dir)
        os.chdir(server_dir)
        self.server_dirs.append(server_dir)
        try:
            logging.debug('')
            logging.debug('tester pid: %s', os.getpid())
            logging.debug('starting server...')

            if port is None:
                # Exercise both AF_INET and AF_UNIX/AF_PIPE.
                port = -1 if _SERVER_ID & 1 else 0

            if allowed_users is None:
                credentials = get_credentials()
                allowed_users = {credentials.user: credentials.public_key}

            allowed_types = [
                'openmdao.main.test.test_distsim.HollowSphere',
                'openmdao.main.test.test_distsim.Box',
                'openmdao.main.test.test_distsim.ProtectedBox'
            ]

            server, server_cfg = start_server(port=port,
                                              allowed_users=allowed_users,
                                              allowed_types=allowed_types,
                                              log_prefix=server_dir)
            self.servers.append(server)
            cfg = read_server_config(server_cfg)
            self.address = cfg['address']
            self.port = cfg['port']
            self.tunnel = cfg['tunnel']
            self.key = cfg['key']
            logging.debug('server pid: %s', server.pid)
            logging.debug('server address: %s', self.address)
            logging.debug('server port: %s', self.port)
            logging.debug('server key: %s', self.key)
        finally:
            os.chdir('..')

        factory = connect(self.address,
                          self.port,
                          self.tunnel,
                          pubkey=self.key)
        self.factories.append(factory)
        logging.debug('factory: %r', factory)
        return factory
    def start_factory(self, port=None, allowed_users=None):
        """ Start each factory process in a unique directory. """
        global _SERVER_ID
        _SERVER_ID += 1

        server_dir = 'Factory_%d' % _SERVER_ID
        if os.path.exists(server_dir):
            shutil.rmtree(server_dir)
        os.mkdir(server_dir)
        os.chdir(server_dir)
        self.server_dirs.append(server_dir)
        try:
            logging.debug('')
            logging.debug('tester pid: %s', os.getpid())
            logging.debug('starting server...')

            if port is None:
                # Exercise both AF_INET and AF_UNIX/AF_PIPE.
                port = -1 if _SERVER_ID & 1 else 0

            if allowed_users is None:
                credentials = get_credentials()
                allowed_users = {credentials.user: credentials.public_key}

            allowed_types = ['openmdao.main.test.test_distsim.HollowSphere',
                             'openmdao.main.test.test_distsim.Box',
                             'openmdao.main.test.test_distsim.ProtectedBox']

            server, server_cfg = start_server(port=port,
                                              allowed_users=allowed_users,
                                              allowed_types=allowed_types,
                                              log_prefix=server_dir)
            self.servers.append(server)
            cfg = read_server_config(server_cfg)
            self.address = cfg['address']
            self.port = cfg['port']
            self.tunnel = cfg['tunnel']
            self.key = cfg['key']
            logging.debug('server pid: %s', server.pid)
            logging.debug('server address: %s', self.address)
            logging.debug('server port: %s', self.port)
            logging.debug('server key: %s', self.key)
        finally:
            os.chdir('..')

        factory = connect(self.address, self.port, self.tunnel, pubkey=self.key)
        self.factories.append(factory)
        logging.debug('factory: %r', factory)
        return factory
예제 #4
0
    def start_factory(self, port=None, allowed_users=None):
        """ Start each factory process in a unique directory. """
        global _SERVER_ID
        _SERVER_ID += 1

        server_dir = "Factory_%d" % _SERVER_ID
        if os.path.exists(server_dir):
            shutil.rmtree(server_dir)
        os.mkdir(server_dir)
        os.chdir(server_dir)
        self.server_dirs.append(server_dir)
        try:
            logging.debug("")
            logging.debug("tester pid: %s", os.getpid())
            logging.debug("starting server...")

            if port is None:
                # Exercise both AF_INET and AF_UNIX/AF_PIPE.
                port = -1 if _SERVER_ID & 1 else 0

            if allowed_users is None:
                credentials = get_credentials()
                allowed_users = {credentials.user: credentials.public_key}

            allowed_types = [
                "openmdao.main.test.test_distsim.HollowSphere",
                "openmdao.main.test.test_distsim.Box",
                "openmdao.main.test.test_distsim.ProtectedBox",
            ]

            server, server_cfg = start_server(port=port, allowed_users=allowed_users, allowed_types=allowed_types)
            self.servers.append(server)
            cfg = read_server_config(server_cfg)
            self.address = cfg["address"]
            self.port = cfg["port"]
            self.tunnel = cfg["tunnel"]
            self.key = cfg["key"]
            logging.debug("server pid: %s", server.pid)
            logging.debug("server address: %s", self.address)
            logging.debug("server port: %s", self.port)
            logging.debug("server key: %s", self.key)
        finally:
            os.chdir("..")

        factory = connect(self.address, self.port, self.tunnel, pubkey=self.key)
        self.factories.append(factory)
        logging.debug("factory: %r", factory)
        return factory
    def test_4_authkey(self):
        logging.debug('')
        logging.debug('test_authkey')

        factory = self.start_factory()

        # Start server in non-public-key mode.
        # Connections must have matching authkey,
        # but data is sent in the clear!?
        # This is standard multiprocessing behaviour.
        authkey = 'password'
        server_dir = 'Factory_authkey'
        if os.path.exists(server_dir):
            shutil.rmtree(server_dir)
        os.mkdir(server_dir)
        os.chdir(server_dir)
        self.server_dirs.append(server_dir)
        try:
            logging.debug('starting server (authkey %s)...', authkey)
            allowed_types = ['openmdao.main.test.test_distsim.Box']
            server, server_cfg = start_server(authkey=authkey,
                                              allowed_types=allowed_types,
                                              timeout=30)
            cfg = read_server_config(server_cfg)
            address = cfg['address']
            port = cfg['port']
            key = cfg['key']
            logging.debug('server address: %s', address)
            logging.debug('server port: %s', port)
            logging.debug('server tunnel: %s', cfg['tunnel'])
            logging.debug('server key: %s', key)
        finally:
            os.chdir('..')

        factory = None
        try:
            assert_raises(self, 'connect(address, port, pubkey=key)',
                          globals(), locals(), AuthenticationError,
                          'digest sent was rejected')

            factory = connect(address, port, authkey=authkey)
            logging.debug('factory: %r', factory)

            # Create model and run it.
            box = factory.create(_MODULE + '.Box')
            model = set_as_top(Model(box))
            model.run()

            # Check results.
            for width in range(1, 2):
                for height in range(1, 3):
                    for depth in range(1, 4):
                        case = model.driver.recorders[0].cases.pop(0)
                        self.assertEqual(case.outputs[0][2],
                                         width * height * depth)
        finally:
            if factory is not None:
                factory.cleanup()
            logging.debug('terminating server (authkey %s) pid %s', authkey,
                          server.pid)
            server.terminate(timeout=10)
            server = None
예제 #6
0
    def test_4_authkey(self):
        logging.debug("")
        logging.debug("test_authkey")

        factory = self.start_factory()

        # Start server in non-public-key mode.
        # Connections must have matching authkey,
        # but data is sent in the clear!?
        # This is standard multiprocessing behaviour.
        authkey = "password"
        server_dir = "Factory_authkey"
        if os.path.exists(server_dir):
            shutil.rmtree(server_dir)
        os.mkdir(server_dir)
        os.chdir(server_dir)
        self.server_dirs.append(server_dir)
        try:
            logging.debug("starting server (authkey %s)...", authkey)
            allowed_types = ["openmdao.main.test.test_distsim.Box"]
            server, server_cfg = start_server(authkey=authkey, allowed_types=allowed_types, timeout=30)
            cfg = read_server_config(server_cfg)
            address = cfg["address"]
            port = cfg["port"]
            key = cfg["key"]
            logging.debug("server address: %s", address)
            logging.debug("server port: %s", port)
            logging.debug("server tunnel: %s", cfg["tunnel"])
            logging.debug("server key: %s", key)
        finally:
            os.chdir("..")

        factory = None
        try:
            assert_raises(
                self,
                "connect(address, port, pubkey=key)",
                globals(),
                locals(),
                AuthenticationError,
                "digest sent was rejected",
            )

            factory = connect(address, port, authkey=authkey)
            logging.debug("factory: %r", factory)

            # Create model and run it.
            box = factory.create(_MODULE + ".Box")
            model = set_as_top(Model(box))
            model.run()

            # Check results.
            for width in range(1, 2):
                for height in range(1, 3):
                    for depth in range(1, 4):
                        case = model.driver.recorders[0].cases.pop(0)
                        self.assertEqual(case.outputs[0][2], width * height * depth)
        finally:
            if factory is not None:
                factory.cleanup()
            logging.debug("terminating server (authkey %s) pid %s", authkey, server.pid)
            server.terminate(timeout=10)
            server = None
예제 #7
0
def main():
    """ Run latency & thruput tests on various server configurations. """
    init_messages()
    latency_results = {}
    thruput_results = {}

    # For each configuration...
    count = 0
    for authkey in ('PublicKey', 'UnEncrypted'):
        for ip_port in (0, -1):
            for hops in (1, 2):
                # Start factory in unique directory.
                count += 1
                name = 'Echo_%d' % count
                if os.path.exists(name):
                    shutil.rmtree(name, onerror=onerror)
                os.mkdir(name)
                os.chdir(name)
                try:
                    server_proc, server_cfg = \
                        start_server(authkey=authkey, port=ip_port)
                    cfg = read_server_config(server_cfg)
                finally:
                    os.chdir('..')

                # Connect to factory.
                address = cfg['address']
                port = cfg['port']
                key = cfg['key']
                print
                print '%s, %s %d, hops: %d' % (authkey, address, port, hops)
                factory = connect(address, port, authkey=authkey, pubkey=key)

                if hops == 1:
                    server = factory
                else:
                    # Create a server.
                    server = factory.create('')

                # Run test.
                results = run_test(name, server)

                # Shutdown.
                if server is not factory:
                    factory.release(server)
                factory.cleanup()
                server_proc.terminate(timeout=10)

                # Add results.
                for size, latency, thruput in results:
                    if size not in latency_results:
                        latency_results[size] = []
                    latency_results[size].append(latency)

                    if size not in thruput_results:
                        thruput_results[size] = []
                    thruput_results[size].append(thruput)

    # Write out results in X, Y1, Y2, ... format.
    header = 'Bytes,En-S-1,En-S-2,En-P-1,En-P-2,Un-S-1,Un-S-2,Un-P-1,Un-P-2\n'

    with open('latency.csv', 'w') as out:
        out.write(header)
        for size in sorted(latency_results.keys()):
            out.write('%d' % size)
            for value in latency_results[size]:
                out.write(', %g' % value)
            out.write('\n')

    with open('thruput.csv', 'w') as out:
        out.write(header)
        for size in sorted(thruput_results.keys()):
            out.write('%d' % size)
            for value in thruput_results[size]:
                out.write(', %g' % value)
            out.write('\n')

    for path in glob.glob('Echo_*'):
        shutil.rmtree(path, onerror=onerror)
예제 #8
0
    def test_factory(self):
        logging.debug('')
        logging.debug('test_factory')

        testdir = 'test_factory'
        if os.path.exists(testdir):
            shutil.rmtree(testdir, onerror=onerror)
        os.mkdir(testdir)
        os.chdir(testdir)

        factory = None
        try:
            # Create a factory.
            factory = ObjServerFactory()

            # Echo some arguments.
            args = factory.echo('Hello', 'world!')
            self.assertEqual(args[0], 'Hello')
            self.assertEqual(args[1], 'world!')

            # List types.
            types = factory.get_available_types()
            names = [name for name, version in types]
            self.assertTrue('openmdao.test.execcomp.ExecComp' in names)

            # Create a component.
            exec_comp = factory.create('openmdao.test.execcomp.ExecComp')
            exec_comp.run()
            directory = 'Server_1' + os.sep
            if sys.platform == 'win32':
                directory = directory.lower()
            self.assertTrue(exec_comp.get_abs_directory().endswith(directory))

            # Create another in specified directory.
            exec_comp = factory.create('openmdao.test.execcomp.ExecComp',
                                       res_desc={'working_directory': 'floyd'})
            exec_comp.run()
            directory = 'floyd' + os.sep
            if sys.platform == 'win32':
                directory = directory.lower()
            self.assertTrue(exec_comp.get_abs_directory().endswith(directory))

            # Start server, connect, stop.
            server, cfg = start_server()
            proxy = connect_to_server(cfg)
            shutil.copy(cfg, 'saved_cfg')
            stop_server(server, cfg)

            _PROXIES.clear()
            assert_raises(self, "connect_to_server('saved_cfg')", globals(),
                          locals(), RuntimeError,
                          "Can't connect to server at ")

            # Force failed factory server startup via invalid port.
            address = socket.gethostbyname(socket.gethostname())
            code = "start_server(address=address, port='xyzzy'," \
                   " allow_shell=True, tunnel=True, resources='')"
            assert_raises(self, code, globals(), locals(), RuntimeError,
                          'Server startup failed')

            # Try to release a server that doesn't exist (release takes an
            # OpenMDAO_Proxy as argument, string here is easier).
            assert_raises(self, "factory.release('xyzzy')", globals(),
                          locals(), ValueError,
                          "can't identify server at 'not-a-proxy'")

            # get_ram() is used by RAM.add_remotes().
            ram = factory.get_ram()
            self.assertTrue(ram is RAM._get_instance())

        finally:
            if factory is not None:
                factory.cleanup()
            SimulationRoot.chroot('..')
            if sys.platform == 'win32':
                time.sleep(2)  # Wait for process shutdown.
            keep_dirs = int(os.environ.get('OPENMDAO_KEEPDIRS', '0'))
            if not keep_dirs:
                shutil.rmtree(testdir, onerror=onerror)
    def test_remote(self):
        logging.debug('')
        logging.debug('test_remote')

        # Start remote server.
        server_dir = 'Factory'
        if os.path.exists(server_dir):
            shutil.rmtree(server_dir, onerror=onerror)
        os.mkdir(server_dir)
        os.chdir(server_dir)
        try:
            server, server_cfg = start_server()
            cfg = read_server_config(server_cfg)
            factory = None
            try:
                factory = connect(cfg['address'], cfg['port'],
                                  pubkey=cfg['key'])
                prefix = RAM._make_prefix(factory.host)
                remote = '%s_LocalHost' % prefix

                # Show no remotes currently in RAM.
                allocator_names = \
                    [allocator.name for allocator in RAM.list_allocators()]
                logging.debug('%s', allocator_names)
                self.assertFalse(remote in allocator_names)

                # Add remote server's allocator.
                RAM.add_remotes(factory)
                allocator_names = \
                    [allocator.name for allocator in RAM.list_allocators()]
                logging.debug('%s', allocator_names)
                self.assertTrue(remote in allocator_names)
                self.assertFalse(RAM.get_allocator(remote) is RAM.list_allocators()[0])
                self.assertTrue(RAM.get_allocator(remote) is RAM.list_allocators()[1])

                # Max servers.
                max_servers = RAM.max_servers(dict(allocator=remote))
                self.assertTrue(max_servers >= 0)  # Avoid host load issues.

                remote_alloc = RAM.get_allocator(remote)

                max_servers, info = \
                    remote_alloc.max_servers(dict(localhost=True))
                self.assertEqual(max_servers, 0)
                self.assertEqual(info, dict(localhost='requested local host'))

                max_servers, info = \
                    remote_alloc.max_servers(dict(allocator='LocalHost'))
                self.assertEqual(max_servers, 0)
                self.assertEqual(info, dict(allocator='wrong allocator'))

                estimate, info = \
                    remote_alloc.time_estimate(dict(allocator='LocalHost'))
                self.assertEqual(estimate, -2)
                self.assertEqual(info, dict(allocator='wrong allocator'))

                # Allocate, release.
                remote_server, info = RAM.allocate(dict(allocator=remote))
                RAM.release(remote_server)

                # Remove remote allocators.
                allocator_names = \
                    [allocator.name for allocator in RAM.list_allocators()]
                for name in allocator_names:
                    if name.startswith(prefix):
                        RAM.remove_allocator(name)
                allocator_names = \
                    [allocator.name for allocator in RAM.list_allocators()]
                logging.debug('%s', allocator_names)
                self.assertFalse(remote in allocator_names)

            finally:
                if factory is not None:
                    factory.cleanup()
                server.terminate(timeout=10)
        finally:
            os.chdir('..')
            shutil.rmtree(server_dir, onerror=onerror)

        # Access local RAM in manner it would be accessed in the server.
        self.assertEqual(RAM._get_instance().get_total_allocators(), 1)
        self.assertTrue(RAM._get_instance().get_allocator_proxy(0)
                        is RAM.list_allocators()[0])
예제 #10
0
    def test_remote(self):
        logging.debug('')
        logging.debug('test_remote')

        # Start remote server.
        server_dir = 'Factory'
        if os.path.exists(server_dir):
            shutil.rmtree(server_dir, onerror=onerror)
        os.mkdir(server_dir)
        os.chdir(server_dir)
        try:
            server, server_cfg = start_server()
            cfg = read_server_config(server_cfg)
            factory = None
            try:
                factory = connect(cfg['address'],
                                  cfg['port'],
                                  pubkey=cfg['key'])
                prefix = RAM._make_prefix(factory.host)
                remote = '%s_LocalHost' % prefix

                # Show no remotes currently in RAM.
                allocator_names = \
                    [allocator.name for allocator in RAM.list_allocators()]
                logging.debug('%s', allocator_names)
                self.assertFalse(remote in allocator_names)

                # Add remote server's allocator.
                RAM.add_remotes(factory)
                allocator_names = \
                    [allocator.name for allocator in RAM.list_allocators()]
                logging.debug('%s', allocator_names)
                self.assertTrue(remote in allocator_names)
                self.assertFalse(
                    RAM.get_allocator(remote) is RAM.list_allocators()[0])
                self.assertTrue(
                    RAM.get_allocator(remote) is RAM.list_allocators()[1])

                # Max servers.
                max_servers = RAM.max_servers(dict(allocator=remote))
                self.assertTrue(max_servers >= 0)  # Avoid host load issues.

                remote_alloc = RAM.get_allocator(remote)

                max_servers, info = \
                    remote_alloc.max_servers(dict(localhost=True))
                self.assertEqual(max_servers, 0)
                self.assertEqual(info, dict(localhost='requested local host'))

                max_servers, info = \
                    remote_alloc.max_servers(dict(allocator='LocalHost'))
                self.assertEqual(max_servers, 0)
                self.assertEqual(info, dict(allocator='wrong allocator'))

                estimate, info = \
                    remote_alloc.time_estimate(dict(allocator='LocalHost'))
                self.assertEqual(estimate, -2)
                self.assertEqual(info, dict(allocator='wrong allocator'))

                # Allocate, release.
                remote_server, info = RAM.allocate(dict(allocator=remote))
                RAM.release(remote_server)

                # Remove remote allocators.
                allocator_names = \
                    [allocator.name for allocator in RAM.list_allocators()]
                for name in allocator_names:
                    if name.startswith(prefix):
                        RAM.remove_allocator(name)
                allocator_names = \
                    [allocator.name for allocator in RAM.list_allocators()]
                logging.debug('%s', allocator_names)
                self.assertFalse(remote in allocator_names)

            finally:
                if factory is not None:
                    factory.cleanup()
                server.terminate(timeout=10)
        finally:
            os.chdir('..')
            shutil.rmtree(server_dir, onerror=onerror)

        # Access local RAM in manner it would be accessed in the server.
        self.assertEqual(RAM._get_instance().get_total_allocators(), 1)
        self.assertTrue(RAM._get_instance().get_allocator_proxy(0) is
                        RAM.list_allocators()[0])
예제 #11
0
def main():
    """ Run latency & thruput tests on various server configurations. """
    init_messages()
    latency_results = {}
    thruput_results = {}

    # For each configuration...
    count = 0
    for authkey in ('PublicKey', 'UnEncrypted'):
        for ip_port in (0, -1):
            for hops in (1, 2):
                # Start factory in unique directory.
                count += 1
                name = 'Echo_%d' % count
                if os.path.exists(name):
                    shutil.rmtree(name)
                os.mkdir(name)
                os.chdir(name)
                try:
                    server_proc, server_cfg = \
                        start_server(authkey=authkey, port=ip_port)
                    cfg = read_server_config(server_cfg)
                finally:
                    os.chdir('..')

                # Connect to factory.
                address = cfg['address']
                port = cfg['port']
                key = cfg['key']
                print
                print '%s, %s %d, hops: %d' % (authkey, address, port, hops)
                factory = connect(address, port, authkey=authkey, pubkey=key)

                if hops == 1:
                    server = factory
                else:
                    # Create a server.
                    server = factory.create('')

                # Run test.
                results = run_test(name, server)

                # Shutdown.
                if server is not factory:
                    factory.release(server)
                factory.cleanup()
                server_proc.terminate(timeout=10)

                # Add results.
                for size, latency, thruput in results:
                    if size not in latency_results:
                        latency_results[size] = []
                    latency_results[size].append(latency)

                    if size not in thruput_results:
                        thruput_results[size] = []
                    thruput_results[size].append(thruput)

    # Write out results in X, Y1, Y2, ... format.
    header = 'Bytes,En-S-1,En-S-2,En-P-1,En-P-2,Un-S-1,Un-S-2,Un-P-1,Un-P-2\n'

    with open('latency.csv', 'w') as out:
        out.write(header)
        for size in sorted(latency_results.keys()):
            out.write('%d' % size)
            for value in latency_results[size]:
                out.write(', %g' % value)
            out.write('\n')

    with open('thruput.csv', 'w') as out:
        out.write(header)
        for size in sorted(thruput_results.keys()):
            out.write('%d' % size)
            for value in thruput_results[size]:
                out.write(', %g' % value)
            out.write('\n')

    for path in glob.glob('Echo_*'):
        shutil.rmtree(path)
    def test_factory(self):
        logging.debug('')
        logging.debug('test_factory')

        testdir = 'test_factory'
        if os.path.exists(testdir):
            shutil.rmtree(testdir, onerror=onerror)
        os.mkdir(testdir)
        os.chdir(testdir)

        factory = None
        try:
            # Create a factory.
            factory = ObjServerFactory()

            # Echo some arguments.
            args = factory.echo('Hello', 'world!')
            self.assertEqual(args[0], 'Hello')
            self.assertEqual(args[1], 'world!')

            # List types.
            types = factory.get_available_types()
            names = [name for name, version in types]
            self.assertTrue('openmdao.test.execcomp.ExecComp' in names)

            # Create a component.
            exec_comp = factory.create('openmdao.test.execcomp.ExecComp')
            exec_comp.run()

            # Start server, connect, stop.
            server, cfg = start_server()
            proxy = connect_to_server(cfg)
            shutil.copy(cfg, 'saved_cfg')
            stop_server(server, cfg)

            _PROXIES.clear()
            assert_raises(self, "connect_to_server('saved_cfg')",
                          globals(), locals(), RuntimeError,
                          "Can't connect to server at ")

            # Force failed factory server startup via invalid port.
            address = socket.gethostbyname(socket.gethostname())
            code = "start_server(address=address, port='xyzzy'," \
                                 " allow_shell=True, tunnel=True, resources='')"
            assert_raises(self, code, globals(), locals(), RuntimeError,
                          'Server startup failed')

            # Try to release a server that doesn't exist (release takes an
            # OpenMDAO_Proxy as argument, string here is easier).
            assert_raises(self, "factory.release('xyzzy')",
                          globals(), locals(), ValueError,
                          "can't identify server at 'not-a-proxy'")

            # get_ram() is used by RAM.add_remotes().
            ram = factory.get_ram()
            self.assertTrue(ram is RAM._get_instance())

        finally:
            if factory is not None:
                factory.cleanup()
            SimulationRoot.chroot('..')
            if sys.platform == 'win32':
                time.sleep(2)  # Wait for process shutdown.
            keep_dirs = int(os.environ.get('OPENMDAO_KEEPDIRS', '0'))
            if not keep_dirs:
                shutil.rmtree(testdir, onerror=onerror)