class InternalBrainClient(object): def __init__(self, conf_file, account='AUTH_test'): self.swift = InternalClient(conf_file, 'probe-test', 3) self.account = account @translate_client_exception def put_container(self, container_name, headers): return self.swift.create_container(self.account, container_name, headers=headers) @translate_client_exception def post_container(self, container_name, headers): return self.swift.set_container_metadata(self.account, container_name, headers) @translate_client_exception def delete_container(self, container_name): return self.swift.delete_container(self.account, container_name) def parse_qs(self, query_string): if query_string is not None: return {k: v[-1] for k, v in parse_qs(query_string).items()} @translate_client_exception def put_object(self, container_name, object_name, headers, contents, query_string=None): return self.swift.upload_object(StringIO(contents), self.account, container_name, object_name, headers=headers, params=self.parse_qs(query_string)) @translate_client_exception def delete_object(self, container_name, object_name): return self.swift.delete_object( self.account, container_name, object_name) @translate_client_exception def head_object(self, container_name, object_name): return self.swift.get_object_metadata( self.account, container_name, object_name) @translate_client_exception def get_object(self, container_name, object_name, query_string=None): status, headers, resp_iter = self.swift.get_object( self.account, container_name, object_name, params=self.parse_qs(query_string)) return headers, ''.join(resp_iter)
class ContainerReconciler(Daemon): """ Move objects that are in the wrong storage policy. """ def __init__(self, conf): self.conf = conf # This option defines how long an un-processable misplaced object # marker will be retried before it is abandoned. It is not coupled # with the tombstone reclaim age in the consistency engine. self.reclaim_age = int(conf.get('reclaim_age', 86400 * 7)) self.interval = int(conf.get('interval', 30)) conf_path = conf.get('__file__') or \ '/etc/swift/container-reconciler.conf' self.logger = get_logger(conf, log_route='container-reconciler') request_tries = int(conf.get('request_tries') or 3) self.swift = InternalClient(conf_path, 'Swift Container Reconciler', request_tries) self.stats = defaultdict(int) self.last_stat_time = time.time() def stats_log(self, metric, msg, *args, **kwargs): """ Update stats tracking for metric and emit log message. """ level = kwargs.pop('level', logging.DEBUG) log_message = '%s: ' % metric + msg self.logger.log(level, log_message, *args, **kwargs) self.stats[metric] += 1 def log_stats(self, force=False): """ Dump stats to logger, noop when stats have been already been logged in the last minute. """ now = time.time() should_log = force or (now - self.last_stat_time > 60) if should_log: self.last_stat_time = now self.logger.info('Reconciler Stats: %r', dict(**self.stats)) def pop_queue(self, container, obj, q_ts, q_record): """ Issue a delete object request to the container for the misplaced object queue entry. :param container: the misplaced objects container :param obj: the name of the misplaced object :param q_ts: the timestamp of the misplaced object :param q_record: the timestamp of the queue entry N.B. q_ts will normally be the same time as q_record except when an object was manually re-enqued. """ q_path = '/%s/%s/%s' % (MISPLACED_OBJECTS_ACCOUNT, container, obj) x_timestamp = slightly_later_timestamp(max(q_record, q_ts)) self.stats_log('pop_queue', 'remove %r (%f) from the queue (%s)', q_path, q_ts, x_timestamp) headers = {'X-Timestamp': x_timestamp} direct_delete_container_entry(self.swift.container_ring, MISPLACED_OBJECTS_ACCOUNT, container, obj, headers=headers) def throw_tombstones(self, account, container, obj, timestamp, policy_index, path): """ Issue a delete object request to the given storage_policy. :param account: the account name :param container: the container name :param obj: the object name :param timestamp: the timestamp of the object to delete :param policy_index: the policy index to direct the request :param path: the path to be used for logging """ x_timestamp = slightly_later_timestamp(timestamp) self.stats_log('cleanup_attempt', '%r (%f) from policy_index ' '%s (%s) will be deleted', path, timestamp, policy_index, x_timestamp) headers = { 'X-Timestamp': x_timestamp, 'X-Backend-Storage-Policy-Index': policy_index, } success = False try: self.swift.delete_object(account, container, obj, acceptable_statuses=(2, 404), headers=headers) except UnexpectedResponse as err: self.stats_log( 'cleanup_failed', '%r (%f) was not cleaned up ' 'in storage_policy %s (%s)', path, timestamp, policy_index, err) else: success = True self.stats_log( 'cleanup_success', '%r (%f) was successfully ' 'removed from policy_index %s', path, timestamp, policy_index) return success def _reconcile_object(self, account, container, obj, q_policy_index, q_ts, q_op, path, **kwargs): """ Perform object reconciliation. :param account: the account name of the misplaced object :param container: the container name of the misplaced object :param obj: the object name :param q_policy_index: the policy index of the source indicated by the queue entry. :param q_ts: the timestamp of the misplaced object :param q_op: the operation of the misplaced request :param path: the full path of the misplaced object for logging :returns: True to indicate the request is fully processed successfully, otherwise False. """ container_policy_index = direct_get_container_policy_index( self.swift.container_ring, account, container) if container_policy_index is None: self.stats_log( 'unavailable_container', '%r (%f) unable to ' 'determine the destination policy_index', path, q_ts) return False if container_policy_index == q_policy_index: self.stats_log( 'noop_object', '%r (%f) container policy_index ' '%s matches queue policy index %s', path, q_ts, container_policy_index, q_policy_index) return True # check if object exists in the destination already self.logger.debug( 'checking for %r (%f) in destination ' 'policy_index %s', path, q_ts, container_policy_index) headers = {'X-Backend-Storage-Policy-Index': container_policy_index} dest_obj = self.swift.get_object_metadata(account, container, obj, headers=headers, acceptable_statuses=(2, 4)) dest_ts = Timestamp(dest_obj.get('x-backend-timestamp', 0)) if dest_ts >= q_ts: self.stats_log( 'found_object', '%r (%f) in policy_index %s ' 'is newer than queue (%f)', path, dest_ts, container_policy_index, q_ts) return self.throw_tombstones(account, container, obj, q_ts, q_policy_index, path) # object is misplaced self.stats_log( 'misplaced_object', '%r (%f) in policy_index %s ' 'should be in policy_index %s', path, q_ts, q_policy_index, container_policy_index) # fetch object from the source location self.logger.debug('fetching %r (%f) from storage policy %s', path, q_ts, q_policy_index) headers = {'X-Backend-Storage-Policy-Index': q_policy_index} try: source_obj_status, source_obj_info, source_obj_iter = \ self.swift.get_object(account, container, obj, headers=headers, acceptable_statuses=(2, 4)) except UnexpectedResponse as err: source_obj_status = err.resp.status_int source_obj_info = {} source_obj_iter = None source_ts = Timestamp(source_obj_info.get('x-backend-timestamp', 0)) if source_obj_status == 404 and q_op == 'DELETE': return self.ensure_tombstone_in_right_location( q_policy_index, account, container, obj, q_ts, path, container_policy_index, source_ts) else: return self.ensure_object_in_right_location( q_policy_index, account, container, obj, q_ts, path, container_policy_index, source_ts, source_obj_status, source_obj_info, source_obj_iter) def ensure_object_in_right_location(self, q_policy_index, account, container, obj, q_ts, path, container_policy_index, source_ts, source_obj_status, source_obj_info, source_obj_iter, **kwargs): """ Validate source object will satisfy the misplaced object queue entry and move to destination. :param q_policy_index: the policy_index for the source object :param account: the account name of the misplaced object :param container: the container name of the misplaced object :param obj: the name of the misplaced object :param q_ts: the timestamp of the misplaced object :param path: the full path of the misplaced object for logging :param container_policy_index: the policy_index of the destination :param source_ts: the timestamp of the source object :param source_obj_status: the HTTP status source object request :param source_obj_info: the HTTP headers of the source object request :param source_obj_iter: the body iter of the source object request """ if source_obj_status // 100 != 2 or source_ts < q_ts: if q_ts < time.time() - self.reclaim_age: # it's old and there are no tombstones or anything; give up self.stats_log('lost_source', '%r (%s) was not available in ' 'policy_index %s and has expired', path, q_ts.internal, q_policy_index, level=logging.CRITICAL) return True # the source object is unavailable or older than the queue # entry; a version that will satisfy the queue entry hopefully # exists somewhere in the cluster, so wait and try again self.stats_log('unavailable_source', '%r (%s) in ' 'policy_index %s responded %s (%s)', path, q_ts.internal, q_policy_index, source_obj_status, source_ts.internal, level=logging.WARNING) return False # optimistically move any source with a timestamp >= q_ts ts = max(Timestamp(source_ts), q_ts) # move the object put_timestamp = slightly_later_timestamp(ts, offset=2) self.stats_log( 'copy_attempt', '%r (%f) in policy_index %s will be ' 'moved to policy_index %s (%s)', path, source_ts, q_policy_index, container_policy_index, put_timestamp) headers = source_obj_info.copy() headers['X-Backend-Storage-Policy-Index'] = container_policy_index headers['X-Timestamp'] = put_timestamp try: self.swift.upload_object(FileLikeIter(source_obj_iter), account, container, obj, headers=headers) except UnexpectedResponse as err: self.stats_log('copy_failed', 'upload %r (%f) from ' 'policy_index %s to policy_index %s ' 'returned %s', path, source_ts, q_policy_index, container_policy_index, err, level=logging.WARNING) return False except: # noqa self.stats_log('unhandled_error', 'unable to upload %r (%f) ' 'from policy_index %s to policy_index %s ', path, source_ts, q_policy_index, container_policy_index, level=logging.ERROR, exc_info=True) return False self.stats_log( 'copy_success', '%r (%f) moved from policy_index %s ' 'to policy_index %s (%s)', path, source_ts, q_policy_index, container_policy_index, put_timestamp) return self.throw_tombstones(account, container, obj, q_ts, q_policy_index, path) def ensure_tombstone_in_right_location(self, q_policy_index, account, container, obj, q_ts, path, container_policy_index, source_ts, **kwargs): """ Issue a DELETE request against the destination to match the misplaced DELETE against the source. """ delete_timestamp = slightly_later_timestamp(q_ts, offset=2) self.stats_log( 'delete_attempt', '%r (%f) in policy_index %s ' 'will be deleted from policy_index %s (%s)', path, source_ts, q_policy_index, container_policy_index, delete_timestamp) headers = { 'X-Backend-Storage-Policy-Index': container_policy_index, 'X-Timestamp': delete_timestamp, } try: self.swift.delete_object(account, container, obj, headers=headers) except UnexpectedResponse as err: self.stats_log('delete_failed', 'delete %r (%f) from ' 'policy_index %s (%s) returned %s', path, source_ts, container_policy_index, delete_timestamp, err, level=logging.WARNING) return False except: # noqa self.stats_log('unhandled_error', 'unable to delete %r (%f) ' 'from policy_index %s (%s)', path, source_ts, container_policy_index, delete_timestamp, level=logging.ERROR, exc_info=True) return False self.stats_log('delete_success', '%r (%f) deleted from ' 'policy_index %s (%s)', path, source_ts, container_policy_index, delete_timestamp, level=logging.INFO) return self.throw_tombstones(account, container, obj, q_ts, q_policy_index, path) def reconcile_object(self, info): """ Process a possibly misplaced object write request. Determine correct destination storage policy by checking with primary containers. Check source and destination, copying or deleting into destination and cleaning up the source as needed. This method wraps _reconcile_object for exception handling. :param info: a queue entry dict :returns: True to indicate the request is fully processed successfully, otherwise False. """ self.logger.debug( 'checking placement for %r (%f) ' 'in policy_index %s', info['path'], info['q_ts'], info['q_policy_index']) success = False try: success = self._reconcile_object(**info) except: # noqa self.logger.exception( 'Unhandled Exception trying to ' 'reconcile %r (%f) in policy_index %s', info['path'], info['q_ts'], info['q_policy_index']) if success: metric = 'success' msg = 'was handled successfully' else: metric = 'retry' msg = 'must be retried' msg = '%(path)r (%(q_ts)f) in policy_index %(q_policy_index)s ' + msg self.stats_log(metric, msg, info, level=logging.INFO) self.log_stats() return success def _iter_containers(self): """ Generate a list of containers to process. """ # hit most recent container first instead of waiting on the updaters current_container = get_reconciler_container_name(time.time()) yield current_container container_gen = self.swift.iter_containers(MISPLACED_OBJECTS_ACCOUNT) self.logger.debug('looking for containers in %s', MISPLACED_OBJECTS_ACCOUNT) while True: one_page = None try: one_page = list( itertools.islice(container_gen, constraints.CONTAINER_LISTING_LIMIT)) except UnexpectedResponse as err: self.logger.error( 'Error listing containers in ' 'account %s (%s)', MISPLACED_OBJECTS_ACCOUNT, err) if not one_page: # don't generally expect more than one page break # reversed order since we expect older containers to be empty for c in reversed(one_page): # encoding here is defensive container = c['name'].encode('utf8') if container == current_container: continue # we've already hit this one this pass yield container def _iter_objects(self, container): """ Generate a list of objects to process. :param container: the name of the container to process If the given container is empty and older than reclaim_age this processor will attempt to reap it. """ self.logger.debug('looking for objects in %s', container) found_obj = False try: for raw_obj in self.swift.iter_objects(MISPLACED_OBJECTS_ACCOUNT, container): found_obj = True yield raw_obj except UnexpectedResponse as err: self.logger.error('Error listing objects in container %s (%s)', container, err) if float(container) < time.time() - self.reclaim_age and \ not found_obj: # Try to delete old empty containers so the queue doesn't # grow without bound. It's ok if there's a conflict. self.swift.delete_container(MISPLACED_OBJECTS_ACCOUNT, container, acceptable_statuses=(2, 404, 409, 412)) def reconcile(self): """ Main entry point for processing misplaced objects. Iterate over all queue entries and delegate to reconcile_object. """ self.logger.debug('pulling items from the queue') for container in self._iter_containers(): for raw_obj in self._iter_objects(container): try: obj_info = parse_raw_obj(raw_obj) except Exception: self.stats_log('invalid_record', 'invalid queue record: %r', raw_obj, level=logging.ERROR, exc_info=True) continue finished = self.reconcile_object(obj_info) if finished: self.pop_queue(container, raw_obj['name'], obj_info['q_ts'], obj_info['q_record']) self.log_stats() self.logger.debug('finished container %s', container) def run_once(self, *args, **kwargs): """ Process every entry in the queue. """ try: self.reconcile() except: # noqa self.logger.exception('Unhandled Exception trying to reconcile') self.log_stats(force=True) def run_forever(self, *args, **kwargs): while True: self.run_once(*args, **kwargs) self.stats = defaultdict(int) self.logger.info('sleeping between intervals (%ss)', self.interval) time.sleep(self.interval)
class ContainerReconciler(Daemon): """ Move objects that are in the wrong storage policy. """ def __init__(self, conf): self.conf = conf self.reclaim_age = int(conf.get('reclaim_age', 86400 * 7)) self.interval = int(conf.get('interval', 30)) conf_path = conf.get('__file__') or \ '/etc/swift/container-reconciler.conf' self.logger = get_logger(conf, log_route='container-reconciler') request_tries = int(conf.get('request_tries') or 3) self.swift = InternalClient(conf_path, 'Swift Container Reconciler', request_tries) self.stats = defaultdict(int) self.last_stat_time = time.time() def stats_log(self, metric, msg, *args, **kwargs): """ Update stats tracking for metric and emit log message. """ level = kwargs.pop('level', logging.DEBUG) log_message = '%s: ' % metric + msg self.logger.log(level, log_message, *args, **kwargs) self.stats[metric] += 1 def log_stats(self, force=False): """ Dump stats to logger, noop when stats have been already been logged in the last minute. """ now = time.time() should_log = force or (now - self.last_stat_time > 60) if should_log: self.last_stat_time = now self.logger.info('Reconciler Stats: %r', dict(**self.stats)) def pop_queue(self, container, obj, q_ts, q_record): """ Issue a delete object request to the container for the misplaced object queue entry. :param container: the misplaced objects container :param q_ts: the timestamp of the misplaced object :param q_record: the timestamp of the queue entry N.B. q_ts will normally be the same time as q_record except when an object was manually re-enqued. """ q_path = '/%s/%s/%s' % (MISPLACED_OBJECTS_ACCOUNT, container, obj) x_timestamp = slightly_later_timestamp(max(q_record, q_ts)) self.stats_log('pop_queue', 'remove %r (%f) from the queue (%s)', q_path, q_ts, x_timestamp) headers = {'X-Timestamp': x_timestamp} direct_delete_container_entry( self.swift.container_ring, MISPLACED_OBJECTS_ACCOUNT, container, obj, headers=headers) def throw_tombstones(self, account, container, obj, timestamp, policy_index, path): """ Issue a delete object request to the given storage_policy. :param account: the account name :param container: the container name :param account: the object name :param timestamp: the timestamp of the object to delete :param policy_index: the policy index to direct the request :param path: the path to be used for logging """ x_timestamp = slightly_later_timestamp(timestamp) self.stats_log('cleanup_attempt', '%r (%f) from policy_index ' '%s (%s) will be deleted', path, timestamp, policy_index, x_timestamp) headers = { 'X-Timestamp': x_timestamp, 'X-Backend-Storage-Policy-Index': policy_index, } success = False try: self.swift.delete_object(account, container, obj, acceptable_statuses=(2, 404), headers=headers) except UnexpectedResponse as err: self.stats_log('cleanup_failed', '%r (%f) was not cleaned up ' 'in storage_policy %s (%s)', path, timestamp, policy_index, err) else: success = True self.stats_log('cleanup_success', '%r (%f) was successfully ' 'removed from policy_index %s', path, timestamp, policy_index) return success def _reconcile_object(self, account, container, obj, q_policy_index, q_ts, q_op, path, **kwargs): """ Perform object reconciliation. :param account: the account name of the misplaced object :param container: the container name of the misplaced object :param obj: the object name :param q_policy_index: the policy index of the source indicated by the queue entry. :param q_ts: the timestamp of the misplaced object :param q_op: the operation of the misplaced request :param path: the full path of the misplaced object for logging :returns: True to indicate the request is fully processed successfully, otherwise False. """ container_policy_index = direct_get_container_policy_index( self.swift.container_ring, account, container) if container_policy_index is None: self.stats_log('unavailable_container', '%r (%f) unable to ' 'determine the destination policy_index', path, q_ts) return False if container_policy_index == q_policy_index: self.stats_log('noop_object', '%r (%f) container policy_index ' '%s matches queue policy index %s', path, q_ts, container_policy_index, q_policy_index) return True # check if object exists in the destination already self.logger.debug('checking for %r (%f) in destination ' 'policy_index %s', path, q_ts, container_policy_index) headers = { 'X-Backend-Storage-Policy-Index': container_policy_index} dest_obj = self.swift.get_object_metadata(account, container, obj, headers=headers, acceptable_statuses=(2, 4)) dest_ts = Timestamp(dest_obj.get('x-backend-timestamp', 0)) if dest_ts >= q_ts: self.stats_log('found_object', '%r (%f) in policy_index %s ' 'is newer than queue (%f)', path, dest_ts, container_policy_index, q_ts) return self.throw_tombstones(account, container, obj, q_ts, q_policy_index, path) # object is misplaced self.stats_log('misplaced_object', '%r (%f) in policy_index %s ' 'should be in policy_index %s', path, q_ts, q_policy_index, container_policy_index) # fetch object from the source location self.logger.debug('fetching %r (%f) from storage policy %s', path, q_ts, q_policy_index) headers = { 'X-Backend-Storage-Policy-Index': q_policy_index} try: source_obj_status, source_obj_info, source_obj_iter = \ self.swift.get_object(account, container, obj, headers=headers, acceptable_statuses=(2, 4)) except UnexpectedResponse as err: source_obj_status = err.resp.status_int source_obj_info = {} source_obj_iter = None source_ts = Timestamp(source_obj_info.get('x-backend-timestamp', 0)) if source_obj_status == 404 and q_op == 'DELETE': return self.ensure_tombstone_in_right_location( q_policy_index, account, container, obj, q_ts, path, container_policy_index, source_ts) else: return self.ensure_object_in_right_location( q_policy_index, account, container, obj, q_ts, path, container_policy_index, source_ts, source_obj_status, source_obj_info, source_obj_iter) def ensure_object_in_right_location(self, q_policy_index, account, container, obj, q_ts, path, container_policy_index, source_ts, source_obj_status, source_obj_info, source_obj_iter, **kwargs): """ Validate source object will satisfy the misplaced object queue entry and move to destination. :param q_policy_index: the policy_index for the source object :param account: the account name of the misplaced object :param container: the container name of the misplaced object :param obj: the name of the misplaced object :param q_ts: the timestamp of the misplaced object :param path: the full path of the misplaced object for logging :param container_policy_index: the policy_index of the destination :param source_ts: the timestamp of the source object :param source_obj_status: the HTTP status source object request :param source_obj_info: the HTTP headers of the source object request :param source_obj_iter: the body iter of the source object request """ if source_obj_status // 100 != 2 or source_ts < q_ts: if q_ts < time.time() - self.reclaim_age: # it's old and there are no tombstones or anything; give up self.stats_log('lost_source', '%r (%s) was not available in ' 'policy_index %s and has expired', path, q_ts.internal, q_policy_index, level=logging.CRITICAL) return True # the source object is unavailable or older than the queue # entry; a version that will satisfy the queue entry hopefully # exists somewhere in the cluster, so wait and try again self.stats_log('unavailable_source', '%r (%s) in ' 'policy_index %s responded %s (%s)', path, q_ts.internal, q_policy_index, source_obj_status, source_ts.internal, level=logging.WARNING) return False # optimistically move any source with a timestamp >= q_ts ts = max(Timestamp(source_ts), q_ts) # move the object put_timestamp = slightly_later_timestamp(ts, offset=2) self.stats_log('copy_attempt', '%r (%f) in policy_index %s will be ' 'moved to policy_index %s (%s)', path, source_ts, q_policy_index, container_policy_index, put_timestamp) headers = source_obj_info.copy() headers['X-Backend-Storage-Policy-Index'] = container_policy_index headers['X-Timestamp'] = put_timestamp try: self.swift.upload_object( FileLikeIter(source_obj_iter), account, container, obj, headers=headers) except UnexpectedResponse as err: self.stats_log('copy_failed', 'upload %r (%f) from ' 'policy_index %s to policy_index %s ' 'returned %s', path, source_ts, q_policy_index, container_policy_index, err, level=logging.WARNING) return False except: # noqa self.stats_log('unhandled_error', 'unable to upload %r (%f) ' 'from policy_index %s to policy_index %s ', path, source_ts, q_policy_index, container_policy_index, level=logging.ERROR, exc_info=True) return False self.stats_log('copy_success', '%r (%f) moved from policy_index %s ' 'to policy_index %s (%s)', path, source_ts, q_policy_index, container_policy_index, put_timestamp) return self.throw_tombstones(account, container, obj, q_ts, q_policy_index, path) def ensure_tombstone_in_right_location(self, q_policy_index, account, container, obj, q_ts, path, container_policy_index, source_ts, **kwargs): """ Issue a DELETE request against the destination to match the misplaced DELETE against the source. """ delete_timestamp = slightly_later_timestamp(q_ts, offset=2) self.stats_log('delete_attempt', '%r (%f) in policy_index %s ' 'will be deleted from policy_index %s (%s)', path, source_ts, q_policy_index, container_policy_index, delete_timestamp) headers = { 'X-Backend-Storage-Policy-Index': container_policy_index, 'X-Timestamp': delete_timestamp, } try: self.swift.delete_object(account, container, obj, headers=headers) except UnexpectedResponse as err: self.stats_log('delete_failed', 'delete %r (%f) from ' 'policy_index %s (%s) returned %s', path, source_ts, container_policy_index, delete_timestamp, err, level=logging.WARNING) return False except: # noqa self.stats_log('unhandled_error', 'unable to delete %r (%f) ' 'from policy_index %s (%s)', path, source_ts, container_policy_index, delete_timestamp, level=logging.ERROR, exc_info=True) return False self.stats_log('delete_success', '%r (%f) deleted from ' 'policy_index %s (%s)', path, source_ts, container_policy_index, delete_timestamp, level=logging.INFO) return self.throw_tombstones(account, container, obj, q_ts, q_policy_index, path) def reconcile_object(self, info): """ Process a possibly misplaced object write request. Determine correct destination storage policy by checking with primary containers. Check source and destination, copying or deleting into destination and cleaning up the source as needed. This method wraps _reconcile_object for exception handling. :param info: a queue entry dict :returns: True to indicate the request is fully processed successfully, otherwise False. """ self.logger.debug('checking placement for %r (%f) ' 'in policy_index %s', info['path'], info['q_ts'], info['q_policy_index']) success = False try: success = self._reconcile_object(**info) except: # noqa self.logger.exception('Unhandled Exception trying to ' 'reconcile %r (%f) in policy_index %s', info['path'], info['q_ts'], info['q_policy_index']) if success: metric = 'success' msg = 'was handled successfully' else: metric = 'retry' msg = 'must be retried' msg = '%(path)r (%(q_ts)f) in policy_index %(q_policy_index)s ' + msg self.stats_log(metric, msg, info, level=logging.INFO) self.log_stats() return success def _iter_containers(self): """ Generate a list of containers to process. """ # hit most recent container first instead of waiting on the updaters current_container = get_reconciler_container_name(time.time()) yield current_container container_gen = self.swift.iter_containers(MISPLACED_OBJECTS_ACCOUNT) self.logger.debug('looking for containers in %s', MISPLACED_OBJECTS_ACCOUNT) while True: one_page = None try: one_page = list(itertools.islice( container_gen, constraints.CONTAINER_LISTING_LIMIT)) except UnexpectedResponse as err: self.logger.error('Error listing containers in ' 'account %s (%s)', MISPLACED_OBJECTS_ACCOUNT, err) if not one_page: # don't generally expect more than one page break # reversed order since we expect older containers to be empty for c in reversed(one_page): # encoding here is defensive container = c['name'].encode('utf8') if container == current_container: continue # we've already hit this one this pass yield container def _iter_objects(self, container): """ Generate a list of objects to process. :param container: the name of the container to process If the given container is empty and older than reclaim_age this processor will attempt to reap it. """ self.logger.debug('looking for objects in %s', container) found_obj = False try: for raw_obj in self.swift.iter_objects( MISPLACED_OBJECTS_ACCOUNT, container): found_obj = True yield raw_obj except UnexpectedResponse as err: self.logger.error('Error listing objects in container %s (%s)', container, err) if float(container) < time.time() - self.reclaim_age and \ not found_obj: # Try to delete old empty containers so the queue doesn't # grow without bound. It's ok if there's a conflict. self.swift.delete_container( MISPLACED_OBJECTS_ACCOUNT, container, acceptable_statuses=(2, 404, 409, 412)) def reconcile(self): """ Main entry point for processing misplaced objects. Iterate over all queue entries and delegate to reconcile_object. """ self.logger.debug('pulling items from the queue') for container in self._iter_containers(): for raw_obj in self._iter_objects(container): try: obj_info = parse_raw_obj(raw_obj) except Exception: self.stats_log('invalid_record', 'invalid queue record: %r', raw_obj, level=logging.ERROR, exc_info=True) continue finished = self.reconcile_object(obj_info) if finished: self.pop_queue(container, raw_obj['name'], obj_info['q_ts'], obj_info['q_record']) self.log_stats() self.logger.debug('finished container %s', container) def run_once(self, *args, **kwargs): """ Process every entry in the queue. """ try: self.reconcile() except: self.logger.exception('Unhandled Exception trying to reconcile') self.log_stats(force=True) def run_forever(self, *args, **kwargs): while True: self.run_once(*args, **kwargs) self.stats = defaultdict(int) self.logger.info('sleeping between intervals (%ss)', self.interval) time.sleep(self.interval)