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"""
Date: 01/18/2020
Author: Xinsheng Wang
Description: A custom script to get MongoDB metrics and send data to Azure Monitor
Requires: MongoClient in python
"""
from calendar import timegm
from time import gmtime
from pymongo import MongoClient, errors
from sys import exit
import json
import requests
import datetime
import hashlib
import hmac
import base64
import os
from glob import glob
customer_id = '86df0cbc-076c-4483-8a32-c59c6550a771'
shared_key = "b3uLsEOXBFBqTiAHDGp9boTeKR6v86f/9cLPWWsWUvs+LcjBIqjDp9CDJL+7vxlKDDRxqXIf1jjjKcZbdV0H/Q=="
log_type = 'MongoDBMonitorLog'
class MongoDB(object):
"""main script class"""
def delete_temporary_files(self):
"""delete temporary files"""
for file in glob('/tmp/mongometrics000*'):
os.remove(file)
def __init__(self):
self.mongo_host = "10.11.0.4"
self.mongo_port = 27017
self.mongo_db = ["admin", ]
self.mongo_user = None
self.mongo_password = None
self.__conn = None
self.__dbnames = None
self.__metrics = []
def connect(self):
"""Connect to MongoDB"""
if self.__conn is None:
if self.mongo_user is None:
try:
self.__conn = MongoClient('mongodb://%s:%s' %
(self.mongo_host,
self.mongo_port))
except errors.PyMongoError as py_mongo_error:
print('Error in MongoDB connection: %s' %
str(py_mongo_error))
else:
try:
self.__conn = MongoClient('mongodb://%s:%s@%s:%s' %
(self.mongo_user,
self.mongo_password,
self.mongo_host,
self.mongo_port))
except errors.PyMongoError as py_mongo_error:
print('Error in MongoDB connection: %s' %
str(py_mongo_error))
def add_metrics(self, k, v):
"""add each metric to the metrics list"""
global body
dict_metrics = {}
dict_metrics["key"] = k
dict_metrics["value"] = v
self.__metrics.append(dict_metrics)
dic = json.dumps(dict_metrics, sort_keys=True, indent=4, separators=(',', ':')).replace('}', '},')
f = open('/tmp/mongometrics0001.txt','a')
f.write(dic)
f.close
os.system("cat /tmp/mongometrics0001.txt |sed '$s/\}\,/\}\]/g;1s/{/[{/' > /tmp/mongometrics0002.txt")
with open('/tmp/mongometrics0002.txt','r') as src:
body = src.read()
print(body)
def get_db_names(self):
"""get a list of DB names"""
if self.__conn is None:
self.connect()
db_handler = self.__conn[self.mongo_db[0]]
master = db_handler.command('isMaster')['ismaster']
dict_metrics = {}
dict_metrics['key'] = 'mongodb.ismaster'
if master:
dict_metrics['value'] = 1
db_names = self.__conn.database_names()
self.__dbnames = db_names
else:
dict_metrics['value'] = 0
self.__metrics.append(dict_metrics)
def get_mongo_db_lld(self):
"""print DB list in json format, to be used for mongo db discovery"""
if self.__dbnames is None:
db_names = self.get_db_names()
else:
db_names = self.__dbnames
dict_metrics = {}
db_list = []
dict_metrics['key'] = 'mongodb.discovery'
dict_metrics['value'] = {"data": db_list}
if db_names is not None:
for db_name in db_names:
dict_lld_metric = {}
dict_lld_metric['{#MONGODBNAME}'] = db_name
db_list.append(dict_lld_metric)
dict_metrics['value'] = '{"data": ' + json.dumps(db_list) + '}'
self.__metrics.insert(0, dict_metrics)
def get_oplog(self):
"""get replica set oplog information"""
if self.__conn is None:
self.connect()
db_handler = self.__conn['local']
coll = db_handler.oplog.rs
op_first = (coll.find().sort('$natural', 1).limit(1))
op_last = (coll.find().sort('$natural', -1).limit(1))
if op_first.count() > 0 and op_last.count() > 0:
op_fst = (op_first.next())['ts'].time
op_last_st = op_last[0]['ts']
op_lst = (op_last.next())['ts'].time
status = round(float(op_lst - op_fst), 1)
self.add_metrics('mongodb.oplog', status)
current_time = timegm(gmtime())
oplog = int(((str(op_last_st).split('('))[1].split(','))[0])
self.add_metrics('mongodb.oplog-sync', (current_time - oplog))
def get_maintenance(self):
"""get replica set maintenance info"""
if self.__conn is None:
self.connect()
db_handler = self.__conn
fsync_locked = int(db_handler.is_locked)
self.add_metrics('mongodb.fsync-locked', fsync_locked)
try:
config = db_handler.admin.command("replSetGetConfig", 1)
connstring = (self.mongo_host + ':' + str(self.mongo_port))
connstrings = list()
for i in range(0, len(config['config']['members'])):
host = config['config']['members'][i]['host']
connstrings.append(host)
if connstring in host:
priority = config['config']['members'][i]['priority']
hidden = int(config['config']['members'][i]['hidden'])
self.add_metrics('mongodb.priority', priority)
self.add_metrics('mongodb.hidden', hidden)
except errors.PyMongoError:
print ('Error while fetching replica set configuration.'
'Not a member of replica set?')
except UnboundLocalError:
print ('Cannot use this mongo host: must be one of ' + ','.join(connstrings))
exit(1)
def get_server_status_metrics(self):
"""get server status"""
if self.__conn is None:
self.connect()
db_handler = self.__conn[self.mongo_db[0]]
ss = db_handler.command('serverStatus')
self.add_metrics('mongodb.version', ss['version'])
self.add_metrics('mongodb.storageEngine', ss['storageEngine']['name'])
self.add_metrics('mongodb.uptime', int(ss['uptime']))
self.add_metrics('mongodb.okstatus', int(ss['ok']))
for k, v in ss['asserts'].items():
self.add_metrics('mongodb.asserts.' + k, v)
for k, v in ss['opcounters'].items():
self.add_metrics('mongodb.operation.' + k, v)
for k, v in ss['connections'].items():
self.add_metrics('mongodb.connection.' + k, v)
self.add_metrics('mongodb.page.faults',
ss['extra_info']['page_faults'])
if ss['storageEngine']['name'] == 'wiredTiger':
self.add_metrics('mongodb.used-cache',
ss['wiredTiger']['cache']
["bytes currently in the cache"])
self.add_metrics('mongodb.total-cache',
ss['wiredTiger']['cache']
["maximum bytes configured"])
self.add_metrics('mongodb.dirty-cache',
ss['wiredTiger']['cache']
["tracked dirty bytes in the cache"])
lock_total_time = ss['globalLock']['totalTime']
self.add_metrics('mongodb.globalLock.totalTime', lock_total_time)
for k, v in ss['globalLock']['currentQueue'].items():
self.add_metrics('mongodb.globalLock.currentQueue.' + k, v)
for k, v in ss['globalLock']['activeClients'].items():
self.add_metrics('mongodb.globalLock.activeClients.' + k, v)
def get_db_stats_metrics(self):
"""get DB stats for each DB"""
if self.__conn is None:
self.connect()
if self.__dbnames is None:
self.get_db_names()
if self.__dbnames is not None:
for mongo_db in self.__dbnames:
db_handler = self.__conn[mongo_db]
dbs = db_handler.command('dbstats')
for k, v in dbs.items():
if k in ['storageSize', 'ok', 'avgObjSize', 'indexes',
'objects', 'collections', 'fileSize',
'numExtents', 'dataSize', 'indexSize',
'nsSizeMB']:
self.add_metrics('mongodb.stats.' + k +
'[' + mongo_db + ']', int(v))
def close(self):
"""close connection to mongo"""
if self.__conn is not None:
self.__conn.close()
def build_signature(customer_id, shared_key, date, content_length, method, content_type, resource):
x_headers = 'x-ms-date:' + date
string_to_hash = method + "\n" + str(content_length) + "\n" + content_type + "\n" + x_headers + "\n" + resource
bytes_to_hash = bytes(string_to_hash).encode('utf-8')
decoded_key = base64.b64decode(shared_key)
encoded_hash = base64.b64encode(hmac.new(decoded_key, bytes_to_hash, digestmod=hashlib.sha256).digest())
authorization = "SharedKey {}:{}".format(customer_id,encoded_hash)
return authorization
def mongodb_azuremonitor_loganalysis_post_data(customer_id, shared_key, body, log_type):
method = 'POST'
content_type = 'application/json'
resource = '/api/logs'
rfc1123date = datetime.datetime.utcnow().strftime('%a, %d %b %Y %H:%M:%S GMT')
content_length = len(body)
signature = build_signature(customer_id, shared_key, rfc1123date, content_length, method, content_type, resource)
uri = 'https://' + customer_id + '.ods.opinsights.azure.com' + resource + '?api-version=2016-04-01'
headers = {
'content-type': content_type,
'Authorization': signature,
'Log-Type': log_type,
'x-ms-date': rfc1123date
}
response = requests.post(uri,data=body, headers=headers)
if (response.status_code >= 200 and response.status_code <= 299):
print 'Accepted'
else:
print "Response code: {}".format(response.status_code)
if __name__ == '__main__':
mongodb = MongoDB()
mongodb.delete_temporary_files()
mongodb.get_db_names()
mongodb.get_mongo_db_lld()
mongodb.get_oplog()
mongodb.get_maintenance()
mongodb.get_server_status_metrics()
mongodb.get_db_stats_metrics()
mongodb.close()
mongodb_azuremonitor_loganalysis_post_data(customer_id, shared_key, body, log_type)
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