X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/ed56c26720184ca3d07f452faf014e177f1a2c2f..72d7d41944006d1f48f570784dafe56b9812b0c8:/sdk/python/arvados/keep.py diff --git a/sdk/python/arvados/keep.py b/sdk/python/arvados/keep.py index 4b5aa754c2..9dfe0436de 100644 --- a/sdk/python/arvados/keep.py +++ b/sdk/python/arvados/keep.py @@ -1,5 +1,10 @@ +# Copyright (C) The Arvados Authors. All rights reserved. +# +# SPDX-License-Identifier: Apache-2.0 + from __future__ import absolute_import from __future__ import division +import copy from future import standard_library from future.utils import native_str standard_library.install_aliases() @@ -287,7 +292,9 @@ class KeepClient(object): def __init__(self, root, user_agent_pool=queue.LifoQueue(), upload_counter=None, - download_counter=None, **headers): + download_counter=None, + headers={}, + insecure=False): self.root = root self._user_agent_pool = user_agent_pool self._result = {'error': None} @@ -299,6 +306,7 @@ class KeepClient(object): self.put_headers = headers self.upload_counter = upload_counter self.download_counter = download_counter + self.insecure = insecure def usable(self): """Is it worth attempting a request?""" @@ -366,9 +374,13 @@ class KeepClient(object): '{}: {}'.format(k,v) for k,v in self.get_headers.items()]) curl.setopt(pycurl.WRITEFUNCTION, response_body.write) curl.setopt(pycurl.HEADERFUNCTION, self._headerfunction) + if self.insecure: + curl.setopt(pycurl.SSL_VERIFYPEER, 0) + else: + curl.setopt(pycurl.CAINFO, arvados.util.ca_certs_path()) if method == "HEAD": curl.setopt(pycurl.NOBODY, True) - self._setcurltimeouts(curl, timeout) + self._setcurltimeouts(curl, timeout, method=="HEAD") try: curl.perform() @@ -412,6 +424,10 @@ class KeepClient(object): _logger.info("HEAD %s: %s bytes", self._result['status_code'], self._result.get('content-length')) + if self._result['headers'].get('x-keep-locator'): + # This is a response to a remote block copy request, return + # the local copy block locator. + return self._result['headers'].get('x-keep-locator') return True _logger.info("GET %s: %s bytes in %s msec (%.3f MiB/sec)", @@ -431,7 +447,9 @@ class KeepClient(object): return None return self._result['body'] - def put(self, hash_s, body, timeout=None): + def put(self, hash_s, body, timeout=None, headers={}): + put_headers = copy.copy(self.put_headers) + put_headers.update(headers) url = self.root + hash_s _logger.debug("Request: PUT %s", url) curl = self._get_user_agent() @@ -455,9 +473,13 @@ class KeepClient(object): curl.setopt(pycurl.INFILESIZE, len(body)) curl.setopt(pycurl.READFUNCTION, body_reader.read) curl.setopt(pycurl.HTTPHEADER, [ - '{}: {}'.format(k,v) for k,v in self.put_headers.items()]) + '{}: {}'.format(k,v) for k,v in put_headers.items()]) curl.setopt(pycurl.WRITEFUNCTION, response_body.write) curl.setopt(pycurl.HEADERFUNCTION, self._headerfunction) + if self.insecure: + curl.setopt(pycurl.SSL_VERIFYPEER, 0) + else: + curl.setopt(pycurl.CAINFO, arvados.util.ca_certs_path()) self._setcurltimeouts(curl, timeout) try: curl.perform() @@ -501,7 +523,7 @@ class KeepClient(object): self.upload_counter.add(len(body)) return True - def _setcurltimeouts(self, curl, timeouts): + def _setcurltimeouts(self, curl, timeouts, ignore_bandwidth=False): if not timeouts: return elif isinstance(timeouts, tuple): @@ -514,8 +536,9 @@ class KeepClient(object): conn_t, xfer_t = (timeouts, timeouts) bandwidth_bps = KeepClient.DEFAULT_TIMEOUT[2] curl.setopt(pycurl.CONNECTTIMEOUT_MS, int(conn_t*1000)) - curl.setopt(pycurl.LOW_SPEED_TIME, int(math.ceil(xfer_t))) - curl.setopt(pycurl.LOW_SPEED_LIMIT, int(math.ceil(bandwidth_bps))) + if not ignore_bandwidth: + curl.setopt(pycurl.LOW_SPEED_TIME, int(math.ceil(xfer_t))) + curl.setopt(pycurl.LOW_SPEED_LIMIT, int(math.ceil(bandwidth_bps))) def _headerfunction(self, header_line): if isinstance(header_line, bytes): @@ -536,38 +559,68 @@ class KeepClient(object): self._lastheadername = name self._headers[name] = value # Returning None implies all bytes were written - + class KeepWriterQueue(queue.Queue): - def __init__(self, copies): + def __init__(self, copies, classes=[]): queue.Queue.__init__(self) # Old-style superclass self.wanted_copies = copies + self.wanted_storage_classes = classes self.successful_copies = 0 + self.confirmed_storage_classes = {} self.response = None - self.successful_copies_lock = threading.Lock() - self.pending_tries = copies + self.storage_classes_tracking = True + self.queue_data_lock = threading.RLock() + self.pending_tries = max(copies, len(classes)) self.pending_tries_notification = threading.Condition() - - def write_success(self, response, replicas_nr): - with self.successful_copies_lock: + + def write_success(self, response, replicas_nr, classes_confirmed): + with self.queue_data_lock: self.successful_copies += replicas_nr + if classes_confirmed is None: + self.storage_classes_tracking = False + elif self.storage_classes_tracking: + for st_class, st_copies in classes_confirmed.items(): + try: + self.confirmed_storage_classes[st_class] += st_copies + except KeyError: + self.confirmed_storage_classes[st_class] = st_copies + self.pending_tries = max(self.wanted_copies - self.successful_copies, len(self.pending_classes())) self.response = response with self.pending_tries_notification: self.pending_tries_notification.notify_all() - + def write_fail(self, ks): with self.pending_tries_notification: self.pending_tries += 1 self.pending_tries_notification.notify() - + def pending_copies(self): - with self.successful_copies_lock: + with self.queue_data_lock: return self.wanted_copies - self.successful_copies + def satisfied_classes(self): + with self.queue_data_lock: + if not self.storage_classes_tracking: + # Notifies disabled storage classes expectation to + # the outer loop. + return None + return list(set(self.wanted_storage_classes) - set(self.pending_classes())) + + def pending_classes(self): + with self.queue_data_lock: + if (not self.storage_classes_tracking) or (self.wanted_storage_classes is None): + return [] + unsatisfied_classes = copy.copy(self.wanted_storage_classes) + for st_class, st_copies in self.confirmed_storage_classes.items(): + if st_class in unsatisfied_classes and st_copies >= self.wanted_copies: + unsatisfied_classes.remove(st_class) + return unsatisfied_classes + def get_next_task(self): with self.pending_tries_notification: while True: - if self.pending_copies() < 1: + if self.pending_copies() < 1 and len(self.pending_classes()) == 0: # This notify_all() is unnecessary -- # write_success() already called notify_all() # when pending<1 became true, so it's not @@ -594,41 +647,40 @@ class KeepClient(object): class KeepWriterThreadPool(object): - def __init__(self, data, data_hash, copies, max_service_replicas, timeout=None): + def __init__(self, data, data_hash, copies, max_service_replicas, timeout=None, classes=[]): self.total_task_nr = 0 - self.wanted_copies = copies if (not max_service_replicas) or (max_service_replicas >= copies): num_threads = 1 else: num_threads = int(math.ceil(1.0*copies/max_service_replicas)) _logger.debug("Pool max threads is %d", num_threads) self.workers = [] - self.queue = KeepClient.KeepWriterQueue(copies) + self.queue = KeepClient.KeepWriterQueue(copies, classes) # Create workers for _ in range(num_threads): w = KeepClient.KeepWriterThread(self.queue, data, data_hash, timeout) self.workers.append(w) - + def add_task(self, ks, service_root): self.queue.put((ks, service_root)) self.total_task_nr += 1 - + def done(self): - return self.queue.successful_copies - + return self.queue.successful_copies, self.queue.satisfied_classes() + def join(self): # Start workers for worker in self.workers: worker.start() # Wait for finished work self.queue.join() - + def response(self): return self.queue.response - - + + class KeepWriterThread(threading.Thread): - TaskFailed = RuntimeError() + class TaskFailed(RuntimeError): pass def __init__(self, queue, data, data_hash, timeout=None): super(KeepClient.KeepWriterThread, self).__init__() @@ -645,20 +697,26 @@ class KeepClient(object): except queue.Empty: return try: - locator, copies = self.do_task(service, service_root) + locator, copies, classes = self.do_task(service, service_root) except Exception as e: - if e is not self.TaskFailed: + if not isinstance(e, self.TaskFailed): _logger.exception("Exception in KeepWriterThread") self.queue.write_fail(service) else: - self.queue.write_success(locator, copies) + self.queue.write_success(locator, copies, classes) finally: self.queue.task_done() def do_task(self, service, service_root): + classes = self.queue.pending_classes() + headers = {} + if len(classes) > 0: + classes.sort() + headers['X-Keep-Storage-Classes'] = ', '.join(classes) success = bool(service.put(self.data_hash, self.data, - timeout=self.timeout)) + timeout=self.timeout, + headers=headers)) result = service.last_result() if not success: @@ -667,7 +725,7 @@ class KeepClient(object): self.data_hash, result['status_code'], result['body']) - raise self.TaskFailed + raise self.TaskFailed() _logger.debug("KeepWriterThread %s succeeded %s+%i %s", str(threading.current_thread()), @@ -679,7 +737,18 @@ class KeepClient(object): except (KeyError, ValueError): replicas_stored = 1 - return result['body'].strip(), replicas_stored + classes_confirmed = {} + try: + scch = result['headers']['x-keep-storage-classes-confirmed'] + for confirmation in scch.replace(' ', '').split(','): + if '=' in confirmation: + stored_class, stored_copies = confirmation.split('=')[:2] + classes_confirmed[stored_class] = int(stored_copies) + except (KeyError, ValueError): + # Storage classes confirmed header missing or corrupt + classes_confirmed = None + + return result['body'].strip(), replicas_stored, classes_confirmed def __init__(self, api_client=None, proxy=None, @@ -757,6 +826,11 @@ class KeepClient(object): if local_store is None: local_store = os.environ.get('KEEP_LOCAL_STORE') + if api_client is None: + self.insecure = config.flag_is_true('ARVADOS_API_HOST_INSECURE') + else: + self.insecure = api_client.insecure + self.block_cache = block_cache if block_cache else KeepBlockCache() self.timeout = timeout self.proxy_timeout = proxy_timeout @@ -767,9 +841,12 @@ class KeepClient(object): self.get_counter = Counter() self.hits_counter = Counter() self.misses_counter = Counter() + self._storage_classes_unsupported_warning = False + self._default_classes = [] if local_store: self.local_store = local_store + self.head = self.local_store_head self.get = self.local_store_get self.put = self.local_store_put else: @@ -806,6 +883,12 @@ class KeepClient(object): self._writable_services = None self.using_proxy = None self._static_services_list = False + try: + self._default_classes = [ + k for k, v in self.api_client.config()['StorageClasses'].items() if v['Default']] + except KeyError: + # We're talking to an old cluster + pass def current_timeout(self, attempt_number): """Return the appropriate timeout to use for this client. @@ -916,7 +999,7 @@ class KeepClient(object): _logger.debug("{}: {}".format(locator, sorted_roots)) return sorted_roots - def map_new_services(self, roots_map, locator, force_rebuild, need_writable, **headers): + def map_new_services(self, roots_map, locator, force_rebuild, need_writable, headers): # roots_map is a dictionary, mapping Keep service root strings # to KeepService objects. Poll for Keep services, and add any # new ones to roots_map. Return the current list of local @@ -929,7 +1012,8 @@ class KeepClient(object): root, self._user_agent_pool, upload_counter=self.upload_counter, download_counter=self.download_counter, - **headers) + headers=headers, + insecure=self.insecure) return local_roots @staticmethod @@ -958,15 +1042,20 @@ class KeepClient(object): else: return None + def refresh_signature(self, loc): + """Ask Keep to get the remote block and return its local signature""" + now = datetime.datetime.utcnow().isoformat("T") + 'Z' + return self.head(loc, headers={'X-Keep-Signature': 'local, {}'.format(now)}) + @retry.retry_method - def head(self, loc_s, num_retries=None): - return self._get_or_head(loc_s, method="HEAD", num_retries=num_retries) + def head(self, loc_s, **kwargs): + return self._get_or_head(loc_s, method="HEAD", **kwargs) @retry.retry_method - def get(self, loc_s, num_retries=None): - return self._get_or_head(loc_s, method="GET", num_retries=num_retries) + def get(self, loc_s, **kwargs): + return self._get_or_head(loc_s, method="GET", **kwargs) - def _get_or_head(self, loc_s, method="GET", num_retries=None): + def _get_or_head(self, loc_s, method="GET", num_retries=None, request_id=None, headers=None): """Get data from Keep. This method fetches one or more blocks of data from Keep. It @@ -991,76 +1080,88 @@ class KeepClient(object): self.get_counter.add(1) - locator = KeepLocator(loc_s) - if method == "GET": - slot, first = self.block_cache.reserve_cache(locator.md5sum) - if not first: - self.hits_counter.add(1) - v = slot.get() - return v - - self.misses_counter.add(1) - - # If the locator has hints specifying a prefix (indicating a - # remote keepproxy) or the UUID of a local gateway service, - # read data from the indicated service(s) instead of the usual - # list of local disk services. - hint_roots = ['http://keep.{}.arvadosapi.com/'.format(hint[2:]) - for hint in locator.hints if hint.startswith('K@') and len(hint) == 7] - hint_roots.extend([self._gateway_services[hint[2:]]['_service_root'] - for hint in locator.hints if ( - hint.startswith('K@') and - len(hint) == 29 and - self._gateway_services.get(hint[2:]) - )]) - # Map root URLs to their KeepService objects. - roots_map = { - root: self.KeepService(root, self._user_agent_pool, - upload_counter=self.upload_counter, - download_counter=self.download_counter) - for root in hint_roots - } - - # See #3147 for a discussion of the loop implementation. Highlights: - # * Refresh the list of Keep services after each failure, in case - # it's being updated. - # * Retry until we succeed, we're out of retries, or every available - # service has returned permanent failure. - sorted_roots = [] - roots_map = {} + slot = None blob = None - loop = retry.RetryLoop(num_retries, self._check_loop_result, - backoff_start=2) - for tries_left in loop: - try: - sorted_roots = self.map_new_services( - roots_map, locator, - force_rebuild=(tries_left < num_retries), - need_writable=False) - except Exception as error: - loop.save_result(error) - continue + try: + locator = KeepLocator(loc_s) + if method == "GET": + slot, first = self.block_cache.reserve_cache(locator.md5sum) + if not first: + self.hits_counter.add(1) + blob = slot.get() + if blob is None: + raise arvados.errors.KeepReadError( + "failed to read {}".format(loc_s)) + return blob + + self.misses_counter.add(1) + + if headers is None: + headers = {} + headers['X-Request-Id'] = (request_id or + (hasattr(self, 'api_client') and self.api_client.request_id) or + arvados.util.new_request_id()) + + # If the locator has hints specifying a prefix (indicating a + # remote keepproxy) or the UUID of a local gateway service, + # read data from the indicated service(s) instead of the usual + # list of local disk services. + hint_roots = ['http://keep.{}.arvadosapi.com/'.format(hint[2:]) + for hint in locator.hints if hint.startswith('K@') and len(hint) == 7] + hint_roots.extend([self._gateway_services[hint[2:]]['_service_root'] + for hint in locator.hints if ( + hint.startswith('K@') and + len(hint) == 29 and + self._gateway_services.get(hint[2:]) + )]) + # Map root URLs to their KeepService objects. + roots_map = { + root: self.KeepService(root, self._user_agent_pool, + upload_counter=self.upload_counter, + download_counter=self.download_counter, + headers=headers, + insecure=self.insecure) + for root in hint_roots + } + + # See #3147 for a discussion of the loop implementation. Highlights: + # * Refresh the list of Keep services after each failure, in case + # it's being updated. + # * Retry until we succeed, we're out of retries, or every available + # service has returned permanent failure. + sorted_roots = [] + roots_map = {} + loop = retry.RetryLoop(num_retries, self._check_loop_result, + backoff_start=2) + for tries_left in loop: + try: + sorted_roots = self.map_new_services( + roots_map, locator, + force_rebuild=(tries_left < num_retries), + need_writable=False, + headers=headers) + except Exception as error: + loop.save_result(error) + continue - # Query KeepService objects that haven't returned - # permanent failure, in our specified shuffle order. - services_to_try = [roots_map[root] - for root in sorted_roots - if roots_map[root].usable()] - for keep_service in services_to_try: - blob = keep_service.get(locator, method=method, timeout=self.current_timeout(num_retries-tries_left)) - if blob is not None: - break - loop.save_result((blob, len(services_to_try))) - - # Always cache the result, then return it if we succeeded. - if method == "GET": - slot.set(blob) - self.block_cache.cap_cache() - if loop.success(): - if method == "HEAD": - return True - else: + # Query KeepService objects that haven't returned + # permanent failure, in our specified shuffle order. + services_to_try = [roots_map[root] + for root in sorted_roots + if roots_map[root].usable()] + for keep_service in services_to_try: + blob = keep_service.get(locator, method=method, timeout=self.current_timeout(num_retries-tries_left)) + if blob is not None: + break + loop.save_result((blob, len(services_to_try))) + + # Always cache the result, then return it if we succeeded. + if loop.success(): return blob + finally: + if slot is not None: + slot.set(blob) + self.block_cache.cap_cache() # Q: Including 403 is necessary for the Keep tests to continue # passing, but maybe they should expect KeepReadError instead? @@ -1077,10 +1178,10 @@ class KeepClient(object): "{} not found".format(loc_s), service_errors) else: raise arvados.errors.KeepReadError( - "failed to read {}".format(loc_s), service_errors, label="service") + "failed to read {} after {}".format(loc_s, loop.attempts_str()), service_errors, label="service") @retry.retry_method - def put(self, data, copies=2, num_retries=None): + def put(self, data, copies=2, num_retries=None, request_id=None, classes=None): """Save data in Keep. This method will get a list of Keep services from the API server, and @@ -1097,8 +1198,12 @@ class KeepClient(object): *each* Keep server if it returns temporary failures, with exponential backoff. The default value is set when the KeepClient is initialized. + * classes: An optional list of storage class names where copies should + be written. """ + classes = classes or self._default_classes + if not isinstance(data, bytes): data = data.encode() @@ -1110,35 +1215,61 @@ class KeepClient(object): return loc_s locator = KeepLocator(loc_s) - headers = {} - # Tell the proxy how many copies we want it to store - headers['X-Keep-Desired-Replicas'] = str(copies) + headers = { + 'X-Request-Id': (request_id or + (hasattr(self, 'api_client') and self.api_client.request_id) or + arvados.util.new_request_id()), + 'X-Keep-Desired-Replicas': str(copies), + } roots_map = {} loop = retry.RetryLoop(num_retries, self._check_loop_result, backoff_start=2) - done = 0 + done_copies = 0 + done_classes = [] for tries_left in loop: try: sorted_roots = self.map_new_services( roots_map, locator, - force_rebuild=(tries_left < num_retries), need_writable=True, **headers) + force_rebuild=(tries_left < num_retries), + need_writable=True, + headers=headers) except Exception as error: loop.save_result(error) continue - writer_pool = KeepClient.KeepWriterThreadPool(data=data, + pending_classes = [] + if done_classes is not None: + pending_classes = list(set(classes) - set(done_classes)) + writer_pool = KeepClient.KeepWriterThreadPool(data=data, data_hash=data_hash, - copies=copies - done, + copies=copies - done_copies, max_service_replicas=self.max_replicas_per_service, - timeout=self.current_timeout(num_retries - tries_left)) + timeout=self.current_timeout(num_retries - tries_left), + classes=pending_classes) for service_root, ks in [(root, roots_map[root]) for root in sorted_roots]: if ks.finished(): continue writer_pool.add_task(ks, service_root) writer_pool.join() - done += writer_pool.done() - loop.save_result((done >= copies, writer_pool.total_task_nr)) + pool_copies, pool_classes = writer_pool.done() + done_copies += pool_copies + if (done_classes is not None) and (pool_classes is not None): + done_classes += pool_classes + loop.save_result( + (done_copies >= copies and set(done_classes) == set(classes), + writer_pool.total_task_nr)) + else: + # Old keepstore contacted without storage classes support: + # success is determined only by successful copies. + # + # Disable storage classes tracking from this point forward. + if not self._storage_classes_unsupported_warning: + self._storage_classes_unsupported_warning = True + _logger.warning("X-Keep-Storage-Classes header not supported by the cluster") + done_classes = None + loop.save_result( + (done_copies >= copies, writer_pool.total_task_nr)) if loop.success(): return writer_pool.response() @@ -1151,10 +1282,10 @@ class KeepClient(object): for key in sorted_roots if roots_map[key].last_result()['error']) raise arvados.errors.KeepWriteError( - "failed to write {} (wanted {} copies but wrote {})".format( - data_hash, copies, writer_pool.done()), service_errors, label="service") + "failed to write {} after {} (wanted {} copies but wrote {})".format( + data_hash, loop.attempts_str(), (copies, classes), writer_pool.done()), service_errors, label="service") - def local_store_put(self, data, copies=1, num_retries=None): + def local_store_put(self, data, copies=1, num_retries=None, classes=[]): """A stub for put(). This method is used in place of the real put() method when @@ -1186,5 +1317,17 @@ class KeepClient(object): with open(os.path.join(self.local_store, locator.md5sum), 'rb') as f: return f.read() + def local_store_head(self, loc_s, num_retries=None): + """Companion to local_store_put().""" + try: + locator = KeepLocator(loc_s) + except ValueError: + raise arvados.errors.NotFoundError( + "Invalid data locator: '%s'" % loc_s) + if locator.md5sum == config.EMPTY_BLOCK_LOCATOR.split('+')[0]: + return True + if os.path.exists(os.path.join(self.local_store, locator.md5sum)): + return True + def is_cached(self, locator): return self.block_cache.reserve_cache(expect_hash)