# -*- coding: utf-8 -*- # Description: mongodb netdata python.d module # Author: ilyam8 # SPDX-License-Identifier: GPL-3.0-or-later from copy import deepcopy from datetime import datetime from sys import exc_info try: from pymongo import MongoClient, ASCENDING, DESCENDING from pymongo.errors import PyMongoError PYMONGO = True except ImportError: PYMONGO = False from bases.FrameworkServices.SimpleService import SimpleService REPL_SET_STATES = [ ('1', 'primary'), ('8', 'down'), ('2', 'secondary'), ('3', 'recovering'), ('5', 'startup2'), ('4', 'fatal'), ('7', 'arbiter'), ('6', 'unknown'), ('9', 'rollback'), ('10', 'removed'), ('0', 'startup') ] def multiply_by_100(value): return value * 100 DEFAULT_METRICS = [ ('opcounters.delete', None, None), ('opcounters.update', None, None), ('opcounters.insert', None, None), ('opcounters.query', None, None), ('opcounters.getmore', None, None), ('globalLock.activeClients.readers', 'activeClients_readers', None), ('globalLock.activeClients.writers', 'activeClients_writers', None), ('connections.available', 'connections_available', None), ('connections.current', 'connections_current', None), ('mem.mapped', None, None), ('mem.resident', None, None), ('mem.virtual', None, None), ('globalLock.currentQueue.readers', 'currentQueue_readers', None), ('globalLock.currentQueue.writers', 'currentQueue_writers', None), ('asserts.msg', None, None), ('asserts.regular', None, None), ('asserts.user', None, None), ('asserts.warning', None, None), ('extra_info.page_faults', None, None), ('metrics.record.moves', None, None), ('backgroundFlushing.average_ms', None, multiply_by_100), ('backgroundFlushing.last_ms', None, multiply_by_100), ('backgroundFlushing.flushes', None, multiply_by_100), ('metrics.cursor.timedOut', None, None), ('metrics.cursor.open.total', 'cursor_total', None), ('metrics.cursor.open.noTimeout', None, None), ('cursors.timedOut', None, None), ('cursors.totalOpen', 'cursor_total', None) ] DUR = [ ('dur.commits', None, None), ('dur.journaledMB', None, multiply_by_100) ] WIREDTIGER = [ ('wiredTiger.concurrentTransactions.read.available', 'wiredTigerRead_available', None), ('wiredTiger.concurrentTransactions.read.out', 'wiredTigerRead_out', None), ('wiredTiger.concurrentTransactions.write.available', 'wiredTigerWrite_available', None), ('wiredTiger.concurrentTransactions.write.out', 'wiredTigerWrite_out', None), ('wiredTiger.cache.bytes currently in the cache', None, None), ('wiredTiger.cache.tracked dirty bytes in the cache', None, None), ('wiredTiger.cache.maximum bytes configured', None, None), ('wiredTiger.cache.unmodified pages evicted', 'unmodified', None), ('wiredTiger.cache.modified pages evicted', 'modified', None) ] TCMALLOC = [ ('tcmalloc.generic.current_allocated_bytes', None, None), ('tcmalloc.generic.heap_size', None, None), ('tcmalloc.tcmalloc.central_cache_free_bytes', None, None), ('tcmalloc.tcmalloc.current_total_thread_cache_bytes', None, None), ('tcmalloc.tcmalloc.pageheap_free_bytes', None, None), ('tcmalloc.tcmalloc.pageheap_unmapped_bytes', None, None), ('tcmalloc.tcmalloc.thread_cache_free_bytes', None, None), ('tcmalloc.tcmalloc.transfer_cache_free_bytes', None, None) ] COMMANDS = [ ('metrics.commands.count.total', 'count_total', None), ('metrics.commands.createIndexes.total', 'createIndexes_total', None), ('metrics.commands.delete.total', 'delete_total', None), ('metrics.commands.eval.total', 'eval_total', None), ('metrics.commands.findAndModify.total', 'findAndModify_total', None), ('metrics.commands.insert.total', 'insert_total', None), ('metrics.commands.delete.total', 'delete_total', None), ('metrics.commands.count.failed', 'count_failed', None), ('metrics.commands.createIndexes.failed', 'createIndexes_failed', None), ('metrics.commands.delete.failed', 'delete_failed', None), ('metrics.commands.eval.failed', 'eval_failed', None), ('metrics.commands.findAndModify.failed', 'findAndModify_failed', None), ('metrics.commands.insert.failed', 'insert_failed', None), ('metrics.commands.delete.failed', 'delete_failed', None) ] LOCKS = [ ('locks.Collection.acquireCount.R', 'Collection_R', None), ('locks.Collection.acquireCount.r', 'Collection_r', None), ('locks.Collection.acquireCount.W', 'Collection_W', None), ('locks.Collection.acquireCount.w', 'Collection_w', None), ('locks.Database.acquireCount.R', 'Database_R', None), ('locks.Database.acquireCount.r', 'Database_r', None), ('locks.Database.acquireCount.W', 'Database_W', None), ('locks.Database.acquireCount.w', 'Database_w', None), ('locks.Global.acquireCount.R', 'Global_R', None), ('locks.Global.acquireCount.r', 'Global_r', None), ('locks.Global.acquireCount.W', 'Global_W', None), ('locks.Global.acquireCount.w', 'Global_w', None), ('locks.Metadata.acquireCount.R', 'Metadata_R', None), ('locks.Metadata.acquireCount.w', 'Metadata_w', None), ('locks.oplog.acquireCount.r', 'oplog_r', None), ('locks.oplog.acquireCount.w', 'oplog_w', None) ] DBSTATS = [ 'dataSize', 'indexSize', 'storageSize', 'objects' ] # charts order (can be overridden if you want less charts, or different order) ORDER = [ 'read_operations', 'write_operations', 'active_clients', 'journaling_transactions', 'journaling_volume', 'background_flush_average', 'background_flush_last', 'background_flush_rate', 'wiredtiger_read', 'wiredtiger_write', 'cursors', 'connections', 'memory', 'page_faults', 'queued_requests', 'record_moves', 'wiredtiger_cache', 'wiredtiger_pages_evicted', 'asserts', 'locks_collection', 'locks_database', 'locks_global', 'locks_metadata', 'locks_oplog', 'dbstats_objects', 'tcmalloc_generic', 'tcmalloc_metrics', 'command_total_rate', 'command_failed_rate' ] CHARTS = { 'read_operations': { 'options': [None, 'Received read requests', 'requests/s', 'throughput metrics', 'mongodb.read_operations', 'line'], 'lines': [ ['query', None, 'incremental'], ['getmore', None, 'incremental'] ] }, 'write_operations': { 'options': [None, 'Received write requests', 'requests/s', 'throughput metrics', 'mongodb.write_operations', 'line'], 'lines': [ ['insert', None, 'incremental'], ['update', None, 'incremental'], ['delete', None, 'incremental'] ] }, 'active_clients': { 'options': [None, 'Clients with read or write operations in progress or queued', 'clients', 'throughput metrics', 'mongodb.active_clients', 'line'], 'lines': [ ['activeClients_readers', 'readers', 'absolute'], ['activeClients_writers', 'writers', 'absolute'] ] }, 'journaling_transactions': { 'options': [None, 'Transactions that have been written to the journal', 'commits', 'database performance', 'mongodb.journaling_transactions', 'line'], 'lines': [ ['commits', None, 'absolute'] ] }, 'journaling_volume': { 'options': [None, 'Volume of data written to the journal', 'MiB', 'database performance', 'mongodb.journaling_volume', 'line'], 'lines': [ ['journaledMB', 'volume', 'absolute', 1, 100] ] }, 'background_flush_average': { 'options': [None, 'Average time taken by flushes to execute', 'milliseconds', 'database performance', 'mongodb.background_flush_average', 'line'], 'lines': [ ['average_ms', 'time', 'absolute', 1, 100] ] }, 'background_flush_last': { 'options': [None, 'Time taken by the last flush operation to execute', 'milliseconds', 'database performance', 'mongodb.background_flush_last', 'line'], 'lines': [ ['last_ms', 'time', 'absolute', 1, 100] ] }, 'background_flush_rate': { 'options': [None, 'Flushes rate', 'flushes', 'database performance', 'mongodb.background_flush_rate', 'line'], 'lines': [ ['flushes', 'flushes', 'incremental', 1, 1] ] }, 'wiredtiger_read': { 'options': [None, 'Read tickets in use and remaining', 'tickets', 'database performance', 'mongodb.wiredtiger_read', 'stacked'], 'lines': [ ['wiredTigerRead_available', 'available', 'absolute', 1, 1], ['wiredTigerRead_out', 'inuse', 'absolute', 1, 1] ] }, 'wiredtiger_write': { 'options': [None, 'Write tickets in use and remaining', 'tickets', 'database performance', 'mongodb.wiredtiger_write', 'stacked'], 'lines': [ ['wiredTigerWrite_available', 'available', 'absolute', 1, 1], ['wiredTigerWrite_out', 'inuse', 'absolute', 1, 1] ] }, 'cursors': { 'options': [None, 'Currently openned cursors, cursors with timeout disabled and timed out cursors', 'cursors', 'database performance', 'mongodb.cursors', 'stacked'], 'lines': [ ['cursor_total', 'openned', 'absolute', 1, 1], ['noTimeout', None, 'absolute', 1, 1], ['timedOut', None, 'incremental', 1, 1] ] }, 'connections': { 'options': [None, 'Currently connected clients and unused connections', 'connections', 'resource utilization', 'mongodb.connections', 'stacked'], 'lines': [ ['connections_available', 'unused', 'absolute', 1, 1], ['connections_current', 'connected', 'absolute', 1, 1] ] }, 'memory': { 'options': [None, 'Memory metrics', 'MiB', 'resource utilization', 'mongodb.memory', 'stacked'], 'lines': [ ['virtual', None, 'absolute', 1, 1], ['resident', None, 'absolute', 1, 1], ['nonmapped', None, 'absolute', 1, 1], ['mapped', None, 'absolute', 1, 1] ] }, 'page_faults': { 'options': [None, 'Number of times MongoDB had to fetch data from disk', 'request/s', 'resource utilization', 'mongodb.page_faults', 'line'], 'lines': [ ['page_faults', None, 'incremental', 1, 1] ] }, 'queued_requests': { 'options': [None, 'Currently queued read and write requests', 'requests', 'resource saturation', 'mongodb.queued_requests', 'line'], 'lines': [ ['currentQueue_readers', 'readers', 'absolute', 1, 1], ['currentQueue_writers', 'writers', 'absolute', 1, 1] ] }, 'record_moves': { 'options': [None, 'Number of times documents had to be moved on-disk', 'number', 'resource saturation', 'mongodb.record_moves', 'line'], 'lines': [ ['moves', None, 'incremental', 1, 1] ] }, 'asserts': { 'options': [ None, 'Number of message, warning, regular, corresponding to errors generated by users assertions raised', 'number', 'errors (asserts)', 'mongodb.asserts', 'line'], 'lines': [ ['msg', None, 'incremental', 1, 1], ['warning', None, 'incremental', 1, 1], ['regular', None, 'incremental', 1, 1], ['user', None, 'incremental', 1, 1] ] }, 'wiredtiger_cache': { 'options': [None, 'The percentage of the wiredTiger cache that is in use and cache with dirty bytes', 'percentage', 'resource utilization', 'mongodb.wiredtiger_cache', 'stacked'], 'lines': [ ['wiredTiger_percent_clean', 'inuse', 'absolute', 1, 1000], ['wiredTiger_percent_dirty', 'dirty', 'absolute', 1, 1000] ] }, 'wiredtiger_pages_evicted': { 'options': [None, 'Pages evicted from the cache', 'pages', 'resource utilization', 'mongodb.wiredtiger_pages_evicted', 'stacked'], 'lines': [ ['unmodified', None, 'absolute', 1, 1], ['modified', None, 'absolute', 1, 1] ] }, 'dbstats_objects': { 'options': [None, 'Number of documents in the database among all the collections', 'documents', 'storage size metrics', 'mongodb.dbstats_objects', 'stacked'], 'lines': [] }, 'tcmalloc_generic': { 'options': [None, 'Tcmalloc generic metrics', 'MiB', 'tcmalloc', 'mongodb.tcmalloc_generic', 'stacked'], 'lines': [ ['current_allocated_bytes', 'allocated', 'absolute', 1, 1 << 20], ['heap_size', 'heap_size', 'absolute', 1, 1 << 20] ] }, 'tcmalloc_metrics': { 'options': [None, 'Tcmalloc metrics', 'KiB', 'tcmalloc', 'mongodb.tcmalloc_metrics', 'stacked'], 'lines': [ ['central_cache_free_bytes', 'central_cache_free', 'absolute', 1, 1024], ['current_total_thread_cache_bytes', 'current_total_thread_cache', 'absolute', 1, 1024], ['pageheap_free_bytes', 'pageheap_free', 'absolute', 1, 1024], ['pageheap_unmapped_bytes', 'pageheap_unmapped', 'absolute', 1, 1024], ['thread_cache_free_bytes', 'thread_cache_free', 'absolute', 1, 1024], ['transfer_cache_free_bytes', 'transfer_cache_free', 'absolute', 1, 1024] ] }, 'command_total_rate': { 'options': [None, 'Commands total rate', 'commands/s', 'commands', 'mongodb.command_total_rate', 'stacked'], 'lines': [ ['count_total', 'count', 'incremental', 1, 1], ['createIndexes_total', 'createIndexes', 'incremental', 1, 1], ['delete_total', 'delete', 'incremental', 1, 1], ['eval_total', 'eval', 'incremental', 1, 1], ['findAndModify_total', 'findAndModify', 'incremental', 1, 1], ['insert_total', 'insert', 'incremental', 1, 1], ['update_total', 'update', 'incremental', 1, 1] ] }, 'command_failed_rate': { 'options': [None, 'Commands failed rate', 'commands/s', 'commands', 'mongodb.command_failed_rate', 'stacked'], 'lines': [ ['count_failed', 'count', 'incremental', 1, 1], ['createIndexes_failed', 'createIndexes', 'incremental', 1, 1], ['delete_failed', 'delete', 'incremental', 1, 1], ['eval_failed', 'eval', 'incremental', 1, 1], ['findAndModify_failed', 'findAndModify', 'incremental', 1, 1], ['insert_failed', 'insert', 'incremental', 1, 1], ['update_failed', 'update', 'incremental', 1, 1] ] }, 'locks_collection': { 'options': [None, 'Collection lock. Number of times the lock was acquired in the specified mode', 'locks', 'locks metrics', 'mongodb.locks_collection', 'stacked'], 'lines': [ ['Collection_R', 'shared', 'incremental'], ['Collection_W', 'exclusive', 'incremental'], ['Collection_r', 'intent_shared', 'incremental'], ['Collection_w', 'intent_exclusive', 'incremental'] ] }, 'locks_database': { 'options': [None, 'Database lock. Number of times the lock was acquired in the specified mode', 'locks', 'locks metrics', 'mongodb.locks_database', 'stacked'], 'lines': [ ['Database_R', 'shared', 'incremental'], ['Database_W', 'exclusive', 'incremental'], ['Database_r', 'intent_shared', 'incremental'], ['Database_w', 'intent_exclusive', 'incremental'] ] }, 'locks_global': { 'options': [None, 'Global lock. Number of times the lock was acquired in the specified mode', 'locks', 'locks metrics', 'mongodb.locks_global', 'stacked'], 'lines': [ ['Global_R', 'shared', 'incremental'], ['Global_W', 'exclusive', 'incremental'], ['Global_r', 'intent_shared', 'incremental'], ['Global_w', 'intent_exclusive', 'incremental'] ] }, 'locks_metadata': { 'options': [None, 'Metadata lock. Number of times the lock was acquired in the specified mode', 'locks', 'locks metrics', 'mongodb.locks_metadata', 'stacked'], 'lines': [ ['Metadata_R', 'shared', 'incremental'], ['Metadata_w', 'intent_exclusive', 'incremental'] ] }, 'locks_oplog': { 'options': [None, 'Lock on the oplog. Number of times the lock was acquired in the specified mode', 'locks', 'locks metrics', 'mongodb.locks_oplog', 'stacked'], 'lines': [ ['oplog_r', 'intent_shared', 'incremental'], ['oplog_w', 'intent_exclusive', 'incremental'] ] } } class Service(SimpleService): def __init__(self, configuration=None, name=None): SimpleService.__init__(self, configuration=configuration, name=name) self.order = ORDER[:] self.definitions = deepcopy(CHARTS) self.authdb = self.configuration.get('authdb', 'admin') self.user = self.configuration.get('user') self.password = self.configuration.get('pass') self.host = self.configuration.get('host', '127.0.0.1') self.port = self.configuration.get('port', 27017) self.timeout = self.configuration.get('timeout', 100) self.metrics_to_collect = deepcopy(DEFAULT_METRICS) self.connection = None self.do_replica = None self.databases = list() def check(self): if not PYMONGO: self.error('Pymongo package v2.4+ is needed to use mongodb.chart.py') return False self.connection, server_status, error = self._create_connection() if error: self.error(error) return False self.build_metrics_to_collect_(server_status) try: data = self._get_data() except (LookupError, SyntaxError, AttributeError): self.error('Type: %s, error: %s' % (str(exc_info()[0]), str(exc_info()[1]))) return False if isinstance(data, dict) and data: self._data_from_check = data self.create_charts_(server_status) return True self.error('_get_data() returned no data or type is not ') return False def build_metrics_to_collect_(self, server_status): self.do_replica = 'repl' in server_status if 'dur' in server_status: self.metrics_to_collect.extend(DUR) if 'tcmalloc' in server_status: self.metrics_to_collect.extend(TCMALLOC) if 'commands' in server_status['metrics']: self.metrics_to_collect.extend(COMMANDS) if 'wiredTiger' in server_status: self.metrics_to_collect.extend(WIREDTIGER) has_locks = 'locks' in server_status if has_locks and 'Collection' in server_status['locks']: self.metrics_to_collect.extend(LOCKS) def create_charts_(self, server_status): if 'dur' not in server_status: self.order.remove('journaling_transactions') self.order.remove('journaling_volume') if 'backgroundFlushing' not in server_status: self.order.remove('background_flush_average') self.order.remove('background_flush_last') self.order.remove('background_flush_rate') if 'wiredTiger' not in server_status: self.order.remove('wiredtiger_write') self.order.remove('wiredtiger_read') self.order.remove('wiredtiger_cache') if 'tcmalloc' not in server_status: self.order.remove('tcmalloc_generic') self.order.remove('tcmalloc_metrics') if 'commands' not in server_status['metrics']: self.order.remove('command_total_rate') self.order.remove('command_failed_rate') has_no_locks = 'locks' not in server_status if has_no_locks or 'Collection' not in server_status['locks']: self.order.remove('locks_collection') self.order.remove('locks_database') self.order.remove('locks_global') self.order.remove('locks_metadata') if has_no_locks or 'oplog' not in server_status['locks']: self.order.remove('locks_oplog') for dbase in self.databases: self.order.append('_'.join([dbase, 'dbstats'])) self.definitions['_'.join([dbase, 'dbstats'])] = { 'options': [None, '%s: size of all documents, indexes, extents' % dbase, 'KB', 'storage size metrics', 'mongodb.dbstats', 'line'], 'lines': [ ['_'.join([dbase, 'dataSize']), 'documents', 'absolute', 1, 1024], ['_'.join([dbase, 'indexSize']), 'indexes', 'absolute', 1, 1024], ['_'.join([dbase, 'storageSize']), 'extents', 'absolute', 1, 1024] ]} self.definitions['dbstats_objects']['lines'].append(['_'.join([dbase, 'objects']), dbase, 'absolute']) if self.do_replica: def create_lines(hosts, string): lines = list() for host in hosts: dim_id = '_'.join([host, string]) lines.append([dim_id, host, 'absolute', 1, 1000]) return lines def create_state_lines(states): lines = list() for state, description in states: dim_id = '_'.join([host, 'state', state]) lines.append([dim_id, description, 'absolute', 1, 1]) return lines all_hosts = server_status['repl']['hosts'] + server_status['repl'].get('arbiters', list()) this_host = server_status['repl']['me'] other_hosts = [host for host in all_hosts if host != this_host] if 'local' in self.databases: self.order.append('oplog_window') self.definitions['oplog_window'] = { 'options': [None, 'Interval of time between the oldest and the latest entries in the oplog', 'seconds', 'replication and oplog', 'mongodb.oplog_window', 'line'], 'lines': [['timeDiff', 'window', 'absolute', 1, 1000]]} # Create "heartbeat delay" chart self.order.append('heartbeat_delay') self.definitions['heartbeat_delay'] = { 'options': [ None, 'Time when last heartbeat was received from the replica set member (lastHeartbeatRecv)', 'seconds ago', 'replication and oplog', 'mongodb.replication_heartbeat_delay', 'stacked'], 'lines': create_lines(other_hosts, 'heartbeat_lag')} # Create "optimedate delay" chart self.order.append('optimedate_delay') self.definitions['optimedate_delay'] = { 'options': [None, 'Time when last entry from the oplog was applied (optimeDate)', 'seconds ago', 'replication and oplog', 'mongodb.replication_optimedate_delay', 'stacked'], 'lines': create_lines(all_hosts, 'optimedate')} # Create "replica set members state" chart for host in all_hosts: chart_name = '_'.join([host, 'state']) self.order.append(chart_name) self.definitions[chart_name] = { 'options': [None, 'Replica set member (%s) current state' % host, 'state', 'replication and oplog', 'mongodb.replication_state', 'line'], 'lines': create_state_lines(REPL_SET_STATES)} def _get_raw_data(self): raw_data = dict() raw_data.update(self.get_server_status() or dict()) raw_data.update(self.get_db_stats() or dict()) raw_data.update(self.get_repl_set_get_status() or dict()) raw_data.update(self.get_get_replication_info() or dict()) return raw_data or None def get_server_status(self): raw_data = dict() try: raw_data['serverStatus'] = self.connection.admin.command('serverStatus') except PyMongoError: return None else: return raw_data def get_db_stats(self): if not self.databases: return None raw_data = dict() raw_data['dbStats'] = dict() try: for dbase in self.databases: raw_data['dbStats'][dbase] = self.connection[dbase].command('dbStats') return raw_data except PyMongoError: return None def get_repl_set_get_status(self): if not self.do_replica: return None raw_data = dict() try: raw_data['replSetGetStatus'] = self.connection.admin.command('replSetGetStatus') return raw_data except PyMongoError: return None def get_get_replication_info(self): if not (self.do_replica and 'local' in self.databases): return None raw_data = dict() raw_data['getReplicationInfo'] = dict() try: raw_data['getReplicationInfo']['ASCENDING'] = self.connection.local.oplog.rs.find().sort( '$natural', ASCENDING).limit(1)[0] raw_data['getReplicationInfo']['DESCENDING'] = self.connection.local.oplog.rs.find().sort( '$natural', DESCENDING).limit(1)[0] return raw_data except PyMongoError: return None def _get_data(self): """ :return: dict """ raw_data = self._get_raw_data() if not raw_data: return None data = dict() serverStatus = raw_data['serverStatus'] dbStats = raw_data.get('dbStats') replSetGetStatus = raw_data.get('replSetGetStatus') getReplicationInfo = raw_data.get('getReplicationInfo') utc_now = datetime.utcnow() # serverStatus for metric, new_name, func in self.metrics_to_collect: value = serverStatus for key in metric.split('.'): try: value = value[key] except KeyError: break if not isinstance(value, dict) and key: data[new_name or key] = value if not func else func(value) if 'mapped' in serverStatus['mem']: data['nonmapped'] = data['virtual'] - serverStatus['mem'].get('mappedWithJournal', data['mapped']) if data.get('maximum bytes configured'): maximum = data['maximum bytes configured'] data['wiredTiger_percent_clean'] = int(data['bytes currently in the cache'] * 100 / maximum * 1000) data['wiredTiger_percent_dirty'] = int(data['tracked dirty bytes in the cache'] * 100 / maximum * 1000) # dbStats if dbStats: for dbase in dbStats: for metric in DBSTATS: key = '_'.join([dbase, metric]) data[key] = dbStats[dbase][metric] # replSetGetStatus if replSetGetStatus: other_hosts = list() members = replSetGetStatus['members'] unix_epoch = datetime(1970, 1, 1, 0, 0) for member in members: if not member.get('self'): other_hosts.append(member) # Replica set time diff between current time and time when last entry from the oplog was applied if member.get('optimeDate', unix_epoch) != unix_epoch: member_optimedate = member['name'] + '_optimedate' delta = utc_now - member['optimeDate'] data[member_optimedate] = int(delta_calculation(delta=delta, multiplier=1000)) # Replica set members state member_state = member['name'] + '_state' for elem in REPL_SET_STATES: state = elem[0] data.update({'_'.join([member_state, state]): 0}) data.update({'_'.join([member_state, str(member['state'])]): member['state']}) # Heartbeat lag calculation for other in other_hosts: if other['lastHeartbeatRecv'] != unix_epoch: node = other['name'] + '_heartbeat_lag' delta = utc_now - other['lastHeartbeatRecv'] data[node] = int(delta_calculation(delta=delta, multiplier=1000)) if getReplicationInfo: first_event = getReplicationInfo['ASCENDING']['ts'].as_datetime() last_event = getReplicationInfo['DESCENDING']['ts'].as_datetime() data['timeDiff'] = int(delta_calculation(delta=last_event - first_event, multiplier=1000)) return data def _create_connection(self): conn_vars = {'host': self.host, 'port': self.port} if hasattr(MongoClient, 'server_selection_timeout'): conn_vars.update({'serverselectiontimeoutms': self.timeout}) try: connection = MongoClient(**conn_vars) if self.user and self.password: getattr(connection, self.authdb).authenticate(name=self.user, password=self.password) # elif self.user: # connection.admin.authenticate(name=self.user, mechanism='MONGODB-X509') server_status = connection.admin.command('serverStatus') except PyMongoError as error: return None, None, str(error) else: try: self.databases = connection.database_names() except PyMongoError as error: self.info('Can\'t collect databases: %s' % str(error)) return connection, server_status, None def delta_calculation(delta, multiplier=1): if hasattr(delta, 'total_seconds'): return delta.total_seconds() * multiplier return (delta.microseconds + (delta.seconds + delta.days * 24 * 3600) * 10 ** 6) / 10.0 ** 6 * multiplier