import hashlib import mock import os import re import socket import unittest import urlparse import arvados import arvados.retry import arvados_testutil as tutil import run_test_server class KeepTestCase(run_test_server.TestCaseWithServers): MAIN_SERVER = {} KEEP_SERVER = {} @classmethod def setUpClass(cls): super(KeepTestCase, cls).setUpClass() run_test_server.authorize_with("admin") cls.api_client = arvados.api('v1') cls.keep_client = arvados.KeepClient(api_client=cls.api_client, proxy='', local_store='') def test_KeepBasicRWTest(self): foo_locator = self.keep_client.put('foo') self.assertRegexpMatches( foo_locator, '^acbd18db4cc2f85cedef654fccc4a4d8\+3', 'wrong md5 hash from Keep.put("foo"): ' + foo_locator) self.assertEqual(self.keep_client.get(foo_locator), 'foo', 'wrong content from Keep.get(md5("foo"))') def test_KeepBinaryRWTest(self): blob_str = '\xff\xfe\xf7\x00\x01\x02' blob_locator = self.keep_client.put(blob_str) self.assertRegexpMatches( blob_locator, '^7fc7c53b45e53926ba52821140fef396\+6', ('wrong locator from Keep.put():' + blob_locator)) self.assertEqual(self.keep_client.get(blob_locator), blob_str, 'wrong content from Keep.get(md5())') def test_KeepLongBinaryRWTest(self): blob_str = '\xff\xfe\xfd\xfc\x00\x01\x02\x03' for i in range(0,23): blob_str = blob_str + blob_str blob_locator = self.keep_client.put(blob_str) self.assertRegexpMatches( blob_locator, '^84d90fc0d8175dd5dcfab04b999bc956\+67108864', ('wrong locator from Keep.put(): ' + blob_locator)) self.assertEqual(self.keep_client.get(blob_locator), blob_str, 'wrong content from Keep.get(md5())') def test_KeepSingleCopyRWTest(self): blob_str = '\xff\xfe\xfd\xfc\x00\x01\x02\x03' blob_locator = self.keep_client.put(blob_str, copies=1) self.assertRegexpMatches( blob_locator, '^c902006bc98a3eb4a3663b65ab4a6fab\+8', ('wrong locator from Keep.put(): ' + blob_locator)) self.assertEqual(self.keep_client.get(blob_locator), blob_str, 'wrong content from Keep.get(md5())') def test_KeepEmptyCollectionTest(self): blob_locator = self.keep_client.put('', copies=1) self.assertRegexpMatches( blob_locator, '^d41d8cd98f00b204e9800998ecf8427e\+0', ('wrong locator from Keep.put(""): ' + blob_locator)) class KeepPermissionTestCase(run_test_server.TestCaseWithServers): MAIN_SERVER = {} KEEP_SERVER = {'blob_signing_key': 'abcdefghijk0123456789', 'enforce_permissions': True} def test_KeepBasicRWTest(self): run_test_server.authorize_with('active') keep_client = arvados.KeepClient() foo_locator = keep_client.put('foo') self.assertRegexpMatches( foo_locator, r'^acbd18db4cc2f85cedef654fccc4a4d8\+3\+A[a-f0-9]+@[a-f0-9]+$', 'invalid locator from Keep.put("foo"): ' + foo_locator) self.assertEqual(keep_client.get(foo_locator), 'foo', 'wrong content from Keep.get(md5("foo"))') # GET with an unsigned locator => NotFound bar_locator = keep_client.put('bar') unsigned_bar_locator = "37b51d194a7513e45b56f6524f2d51f2+3" self.assertRegexpMatches( bar_locator, r'^37b51d194a7513e45b56f6524f2d51f2\+3\+A[a-f0-9]+@[a-f0-9]+$', 'invalid locator from Keep.put("bar"): ' + bar_locator) self.assertRaises(arvados.errors.NotFoundError, keep_client.get, unsigned_bar_locator) # GET from a different user => NotFound run_test_server.authorize_with('spectator') self.assertRaises(arvados.errors.NotFoundError, arvados.Keep.get, bar_locator) # Unauthenticated GET for a signed locator => NotFound # Unauthenticated GET for an unsigned locator => NotFound keep_client.api_token = '' self.assertRaises(arvados.errors.NotFoundError, keep_client.get, bar_locator) self.assertRaises(arvados.errors.NotFoundError, keep_client.get, unsigned_bar_locator) # KeepOptionalPermission: starts Keep with --permission-key-file # but not --enforce-permissions (i.e. generate signatures on PUT # requests, but do not require them for GET requests) # # All of these requests should succeed when permissions are optional: # * authenticated request, signed locator # * authenticated request, unsigned locator # * unauthenticated request, signed locator # * unauthenticated request, unsigned locator class KeepOptionalPermission(run_test_server.TestCaseWithServers): MAIN_SERVER = {} KEEP_SERVER = {'blob_signing_key': 'abcdefghijk0123456789', 'enforce_permissions': False} @classmethod def setUpClass(cls): super(KeepOptionalPermission, cls).setUpClass() run_test_server.authorize_with("admin") cls.api_client = arvados.api('v1') def setUp(self): super(KeepOptionalPermission, self).setUp() self.keep_client = arvados.KeepClient(api_client=self.api_client, proxy='', local_store='') def _put_foo_and_check(self): signed_locator = self.keep_client.put('foo') self.assertRegexpMatches( signed_locator, r'^acbd18db4cc2f85cedef654fccc4a4d8\+3\+A[a-f0-9]+@[a-f0-9]+$', 'invalid locator from Keep.put("foo"): ' + signed_locator) return signed_locator def test_KeepAuthenticatedSignedTest(self): signed_locator = self._put_foo_and_check() self.assertEqual(self.keep_client.get(signed_locator), 'foo', 'wrong content from Keep.get(md5("foo"))') def test_KeepAuthenticatedUnsignedTest(self): signed_locator = self._put_foo_and_check() self.assertEqual(self.keep_client.get("acbd18db4cc2f85cedef654fccc4a4d8"), 'foo', 'wrong content from Keep.get(md5("foo"))') def test_KeepUnauthenticatedSignedTest(self): # Check that signed GET requests work even when permissions # enforcement is off. signed_locator = self._put_foo_and_check() self.keep_client.api_token = '' self.assertEqual(self.keep_client.get(signed_locator), 'foo', 'wrong content from Keep.get(md5("foo"))') def test_KeepUnauthenticatedUnsignedTest(self): # Since --enforce-permissions is not in effect, GET requests # need not be authenticated. signed_locator = self._put_foo_and_check() self.keep_client.api_token = '' self.assertEqual(self.keep_client.get("acbd18db4cc2f85cedef654fccc4a4d8"), 'foo', 'wrong content from Keep.get(md5("foo"))') class KeepProxyTestCase(run_test_server.TestCaseWithServers): MAIN_SERVER = {} KEEP_SERVER = {} KEEP_PROXY_SERVER = {'auth': 'admin'} @classmethod def setUpClass(cls): super(KeepProxyTestCase, cls).setUpClass() cls.api_client = arvados.api('v1') def tearDown(self): arvados.config.settings().pop('ARVADOS_EXTERNAL_CLIENT', None) super(KeepProxyTestCase, self).tearDown() def test_KeepProxyTest1(self): # Will use ARVADOS_KEEP_PROXY environment variable that is set by # setUpClass(). keep_client = arvados.KeepClient(api_client=self.api_client, local_store='') baz_locator = keep_client.put('baz') self.assertRegexpMatches( baz_locator, '^73feffa4b7f6bb68e44cf984c85f6e88\+3', 'wrong md5 hash from Keep.put("baz"): ' + baz_locator) self.assertEqual(keep_client.get(baz_locator), 'baz', 'wrong content from Keep.get(md5("baz"))') self.assertTrue(keep_client.using_proxy) def test_KeepProxyTest2(self): # Don't instantiate the proxy directly, but set the X-External-Client # header. The API server should direct us to the proxy. arvados.config.settings()['ARVADOS_EXTERNAL_CLIENT'] = 'true' keep_client = arvados.KeepClient(api_client=self.api_client, proxy='', local_store='') baz_locator = keep_client.put('baz2') self.assertRegexpMatches( baz_locator, '^91f372a266fe2bf2823cb8ec7fda31ce\+4', 'wrong md5 hash from Keep.put("baz2"): ' + baz_locator) self.assertEqual(keep_client.get(baz_locator), 'baz2', 'wrong content from Keep.get(md5("baz2"))') self.assertTrue(keep_client.using_proxy) class KeepClientServiceTestCase(unittest.TestCase): def mock_keep_services(self, *services): api_client = mock.MagicMock(name='api_client') api_client.keep_services().accessible().execute.return_value = { 'items_available': len(services), 'items': [{ 'uuid': 'zzzzz-bi6l4-{:015x}'.format(index), 'owner_uuid': 'zzzzz-tpzed-000000000000000', 'service_host': host, 'service_port': port, 'service_ssl_flag': ssl, 'service_type': servtype, } for index, (host, port, ssl, servtype) in enumerate(services)], } return api_client def mock_n_keep_disks(self, service_count): return self.mock_keep_services( *[("keep0x{:x}".format(index), 80, False, 'disk') for index in range(service_count)]) def get_service_roots(self, *services): api_client = self.mock_keep_services(*services) keep_client = arvados.KeepClient(api_client=api_client) services = keep_client.weighted_service_roots('000000') return [urlparse.urlparse(url) for url in sorted(services)] def test_ssl_flag_respected_in_roots(self): services = self.get_service_roots(('keep', 10, False, 'disk'), ('keep', 20, True, 'disk')) self.assertEqual(10, services[0].port) self.assertEqual('http', services[0].scheme) self.assertEqual(20, services[1].port) self.assertEqual('https', services[1].scheme) def test_correct_ports_with_ipv6_addresses(self): service = self.get_service_roots(('100::1', 10, True, 'proxy'))[0] self.assertEqual('100::1', service.hostname) self.assertEqual(10, service.port) # test_get_timeout and test_put_timeout test that # KeepClient.get and KeepClient.put use the appropriate timeouts # when connected directly to a Keep server (i.e. non-proxy timeout) def test_get_timeout(self): api_client = self.mock_keep_services(('keep', 10, False, 'disk')) keep_client = arvados.KeepClient(api_client=api_client) force_timeout = [socket.timeout("timed out")] with mock.patch('requests.get', side_effect=force_timeout) as mock_request: with self.assertRaises(arvados.errors.KeepReadError): keep_client.get('ffffffffffffffffffffffffffffffff') self.assertTrue(mock_request.called) self.assertEqual( arvados.KeepClient.DEFAULT_TIMEOUT, mock_request.call_args[1]['timeout']) def test_put_timeout(self): api_client = self.mock_keep_services(('keep', 10, False, 'disk')) keep_client = arvados.KeepClient(api_client=api_client) force_timeout = [socket.timeout("timed out")] with mock.patch('requests.put', side_effect=force_timeout) as mock_request: with self.assertRaises(arvados.errors.KeepWriteError): keep_client.put('foo') self.assertTrue(mock_request.called) self.assertEqual( arvados.KeepClient.DEFAULT_TIMEOUT, mock_request.call_args[1]['timeout']) def test_proxy_get_timeout(self): # Force a timeout, verifying that the requests.get or # requests.put method was called with the proxy_timeout # setting rather than the default timeout. api_client = self.mock_keep_services(('keep', 10, False, 'proxy')) keep_client = arvados.KeepClient(api_client=api_client) force_timeout = [socket.timeout("timed out")] with mock.patch('requests.get', side_effect=force_timeout) as mock_request: with self.assertRaises(arvados.errors.KeepReadError): keep_client.get('ffffffffffffffffffffffffffffffff') self.assertTrue(mock_request.called) self.assertEqual( arvados.KeepClient.DEFAULT_PROXY_TIMEOUT, mock_request.call_args[1]['timeout']) def test_proxy_put_timeout(self): # Force a timeout, verifying that the requests.get or # requests.put method was called with the proxy_timeout # setting rather than the default timeout. api_client = self.mock_keep_services(('keep', 10, False, 'proxy')) keep_client = arvados.KeepClient(api_client=api_client) force_timeout = [socket.timeout("timed out")] with mock.patch('requests.put', side_effect=force_timeout) as mock_request: with self.assertRaises(arvados.errors.KeepWriteError): keep_client.put('foo') self.assertTrue(mock_request.called) self.assertEqual( arvados.KeepClient.DEFAULT_PROXY_TIMEOUT, mock_request.call_args[1]['timeout']) def test_probe_order_reference_set(self): # expected_order[i] is the probe order for # hash=md5(sprintf("%064x",i)) where there are 16 services # with uuid sprintf("anything-%015x",j) with j in 0..15. E.g., # the first probe for the block consisting of 64 "0" # characters is the service whose uuid is # "zzzzz-bi6l4-000000000000003", so expected_order[0][0]=='3'. expected_order = [ list('3eab2d5fc9681074'), list('097dba52e648f1c3'), list('c5b4e023f8a7d691'), list('9d81c02e76a3bf54'), ] hashes = [ hashlib.md5("{:064x}".format(x)).hexdigest() for x in range(len(expected_order))] api_client = self.mock_n_keep_disks(16) keep_client = arvados.KeepClient(api_client=api_client) for i, hash in enumerate(hashes): roots = keep_client.weighted_service_roots(hash) got_order = [ re.search(r'//\[?keep0x([0-9a-f]+)', root).group(1) for root in roots] self.assertEqual(expected_order[i], got_order) def test_probe_waste_adding_one_server(self): hashes = [ hashlib.md5("{:064x}".format(x)).hexdigest() for x in range(100)] initial_services = 12 api_client = self.mock_n_keep_disks(initial_services) keep_client = arvados.KeepClient(api_client=api_client) probes_before = [ keep_client.weighted_service_roots(hash) for hash in hashes] for added_services in range(1, 12): api_client = self.mock_n_keep_disks(initial_services+added_services) keep_client = arvados.KeepClient(api_client=api_client) total_penalty = 0 for hash_index in range(len(hashes)): probe_after = keep_client.weighted_service_roots( hashes[hash_index]) penalty = probe_after.index(probes_before[hash_index][0]) self.assertLessEqual(penalty, added_services) total_penalty += penalty # Average penalty per block should not exceed # N(added)/N(orig) by more than 20%, and should get closer # to the ideal as we add data points. expect_penalty = ( added_services * len(hashes) / initial_services) max_penalty = ( expect_penalty * (120 - added_services)/100) min_penalty = ( expect_penalty * 8/10) self.assertTrue( min_penalty <= total_penalty <= max_penalty, "With {}+{} services, {} blocks, penalty {} but expected {}..{}".format( initial_services, added_services, len(hashes), total_penalty, min_penalty, max_penalty)) def check_64_zeros_error_order(self, verb, exc_class): data = '0' * 64 if verb == 'get': data = hashlib.md5(data).hexdigest() + '+1234' api_client = self.mock_n_keep_disks(16) keep_client = arvados.KeepClient(api_client=api_client) with mock.patch('requests.' + verb, side_effect=socket.timeout) as req_mock, \ self.assertRaises(exc_class) as err_check: getattr(keep_client, verb)(data) urls = [urlparse.urlparse(url) for url in err_check.exception.service_errors()] self.assertEqual([('keep0x' + c, 80) for c in '3eab2d5fc9681074'], [(url.hostname, url.port) for url in urls]) def test_get_error_shows_probe_order(self): self.check_64_zeros_error_order('get', arvados.errors.KeepReadError) def test_put_error_shows_probe_order(self): self.check_64_zeros_error_order('put', arvados.errors.KeepWriteError) def check_no_services_error(self, verb, exc_class): api_client = mock.MagicMock(name='api_client') api_client.keep_services().accessible().execute.side_effect = ( arvados.errors.ApiError) keep_client = arvados.KeepClient(api_client=api_client) with self.assertRaises(exc_class) as err_check: getattr(keep_client, verb)('d41d8cd98f00b204e9800998ecf8427e+0') self.assertEqual(0, len(err_check.exception.service_errors())) def test_get_error_with_no_services(self): self.check_no_services_error('get', arvados.errors.KeepReadError) def test_put_error_with_no_services(self): self.check_no_services_error('put', arvados.errors.KeepWriteError) def check_errors_from_last_retry(self, verb, exc_class): api_client = self.mock_n_keep_disks(2) keep_client = arvados.KeepClient(api_client=api_client) req_mock = getattr(tutil, 'mock_{}_responses'.format(verb))( "retry error reporting test", 500, 500, 403, 403) with req_mock, tutil.skip_sleep, \ self.assertRaises(exc_class) as err_check: getattr(keep_client, verb)('d41d8cd98f00b204e9800998ecf8427e+0', num_retries=3) self.assertEqual([403, 403], [ getattr(error, 'status_code', None) for error in err_check.exception.service_errors().itervalues()]) def test_get_error_reflects_last_retry(self): self.check_errors_from_last_retry('get', arvados.errors.KeepReadError) def test_put_error_reflects_last_retry(self): self.check_errors_from_last_retry('put', arvados.errors.KeepWriteError) def test_put_error_does_not_include_successful_puts(self): data = 'partial failure test' data_loc = '{}+{}'.format(hashlib.md5(data).hexdigest(), len(data)) api_client = self.mock_n_keep_disks(3) keep_client = arvados.KeepClient(api_client=api_client) with tutil.mock_put_responses(data_loc, 200, 500, 500) as req_mock, \ self.assertRaises(arvados.errors.KeepWriteError) as exc_check: keep_client.put(data) self.assertEqual(2, len(exc_check.exception.service_errors())) class KeepClientRetryTestMixin(object): # Testing with a local Keep store won't exercise the retry behavior. # Instead, our strategy is: # * Create a client with one proxy specified (pointed at a black # hole), so there's no need to instantiate an API client, and # all HTTP requests come from one place. # * Mock httplib's request method to provide simulated responses. # This lets us test the retry logic extensively without relying on any # supporting servers, and prevents side effects in case something hiccups. # To use this mixin, define DEFAULT_EXPECT, DEFAULT_EXCEPTION, and # run_method(). # # Test classes must define TEST_PATCHER to a method that mocks # out appropriate methods in the client. PROXY_ADDR = 'http://[%s]:65535/' % (tutil.TEST_HOST,) TEST_DATA = 'testdata' TEST_LOCATOR = 'ef654c40ab4f1747fc699915d4f70902+8' def setUp(self): self.client_kwargs = {'proxy': self.PROXY_ADDR, 'local_store': ''} def new_client(self, **caller_kwargs): kwargs = self.client_kwargs.copy() kwargs.update(caller_kwargs) return arvados.KeepClient(**kwargs) def run_method(self, *args, **kwargs): raise NotImplementedError("test subclasses must define run_method") def check_success(self, expected=None, *args, **kwargs): if expected is None: expected = self.DEFAULT_EXPECT self.assertEqual(expected, self.run_method(*args, **kwargs)) def check_exception(self, error_class=None, *args, **kwargs): if error_class is None: error_class = self.DEFAULT_EXCEPTION self.assertRaises(error_class, self.run_method, *args, **kwargs) def test_immediate_success(self): with self.TEST_PATCHER(self.DEFAULT_EXPECT, 200): self.check_success() def test_retry_then_success(self): with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200): self.check_success(num_retries=3) def test_no_default_retry(self): with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200): self.check_exception() def test_no_retry_after_permanent_error(self): with self.TEST_PATCHER(self.DEFAULT_EXPECT, 403, 200): self.check_exception(num_retries=3) def test_error_after_retries_exhausted(self): with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 500, 200): self.check_exception(num_retries=1) def test_num_retries_instance_fallback(self): self.client_kwargs['num_retries'] = 3 with self.TEST_PATCHER(self.DEFAULT_EXPECT, 500, 200): self.check_success() @tutil.skip_sleep class KeepClientRetryGetTestCase(KeepClientRetryTestMixin, unittest.TestCase): DEFAULT_EXPECT = KeepClientRetryTestMixin.TEST_DATA DEFAULT_EXCEPTION = arvados.errors.KeepReadError HINTED_LOCATOR = KeepClientRetryTestMixin.TEST_LOCATOR + '+K@xyzzy' TEST_PATCHER = staticmethod(tutil.mock_get_responses) def run_method(self, locator=KeepClientRetryTestMixin.TEST_LOCATOR, *args, **kwargs): return self.new_client().get(locator, *args, **kwargs) def test_specific_exception_when_not_found(self): with tutil.mock_get_responses(self.DEFAULT_EXPECT, 404, 200): self.check_exception(arvados.errors.NotFoundError, num_retries=3) def test_general_exception_with_mixed_errors(self): # get should raise a NotFoundError if no server returns the block, # and a high threshold of servers report that it's not found. # This test rigs up 50/50 disagreement between two servers, and # checks that it does not become a NotFoundError. client = self.new_client() with tutil.mock_get_responses(self.DEFAULT_EXPECT, 404, 500): with self.assertRaises(arvados.errors.KeepReadError) as exc_check: client.get(self.HINTED_LOCATOR) self.assertNotIsInstance( exc_check.exception, arvados.errors.NotFoundError, "mixed errors raised NotFoundError") def test_hint_server_can_succeed_without_retries(self): with tutil.mock_get_responses(self.DEFAULT_EXPECT, 404, 200, 500): self.check_success(locator=self.HINTED_LOCATOR) def test_try_next_server_after_timeout(self): side_effects = [ socket.timeout("timed out"), tutil.fake_requests_response(200, self.DEFAULT_EXPECT)] with mock.patch('requests.get', side_effect=iter(side_effects)): self.check_success(locator=self.HINTED_LOCATOR) def test_retry_data_with_wrong_checksum(self): side_effects = (tutil.fake_requests_response(200, s) for s in ['baddata', self.TEST_DATA]) with mock.patch('requests.get', side_effect=side_effects): self.check_success(locator=self.HINTED_LOCATOR) @tutil.skip_sleep class KeepClientRetryPutTestCase(KeepClientRetryTestMixin, unittest.TestCase): DEFAULT_EXPECT = KeepClientRetryTestMixin.TEST_LOCATOR DEFAULT_EXCEPTION = arvados.errors.KeepWriteError TEST_PATCHER = staticmethod(tutil.mock_put_responses) def run_method(self, data=KeepClientRetryTestMixin.TEST_DATA, copies=1, *args, **kwargs): return self.new_client().put(data, copies, *args, **kwargs) def test_do_not_send_multiple_copies_to_same_server(self): with tutil.mock_put_responses(self.DEFAULT_EXPECT, 200): self.check_exception(copies=2, num_retries=3)