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ansible-roles/mongodb-org-3/files/mongodb.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# MongoDB gmond module for Ganglia
#
# Copyright (C) 2011 by Michael T. Conigliaro <mike [at] conigliaro [dot] org>.
# All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
import json
import os
import re
import socket
import string
import time
import copy
NAME_PREFIX = 'mongodb_'
PARAMS = {
'server_status' : '~/mongodb-osx-x86_64-1.8.1/bin/mongo --host mongodb04.example.com --port 27018 --quiet --eval "printjson(db.serverStatus())"',
'rs_status' : '~/mongodb-osx-x86_64-1.8.1/bin/mongo --host mongodb04.example.com --port 27018 --quiet --eval "printjson(rs.status())"'
}
METRICS = {
'time' : 0,
'data' : {}
}
LAST_METRICS = copy.deepcopy(METRICS)
METRICS_CACHE_TTL = 3
def flatten(d, pre = '', sep = '_'):
"""Flatten a dict (i.e. dict['a']['b']['c'] => dict['a_b_c'])"""
new_d = {}
for k,v in d.items():
if type(v) == dict:
new_d.update(flatten(d[k], '%s%s%s' % (pre, k, sep)))
else:
new_d['%s%s' % (pre, k)] = v
return new_d
def get_metrics():
"""Return all metrics"""
global METRICS, LAST_METRICS
if (time.time() - METRICS['time']) > METRICS_CACHE_TTL:
metrics = {}
for status_type in PARAMS.keys():
# get raw metric data
io = os.popen(PARAMS[status_type])
# clean up
metrics_str = ''.join(io.readlines()).strip() # convert to string
metrics_str = re.sub('\w+\((.*)\)', r"\1", metrics_str) # remove functions
# convert to flattened dict
try:
if status_type == 'server_status':
metrics.update(flatten(json.loads(metrics_str)))
else:
metrics.update(flatten(json.loads(metrics_str), pre='%s_' % status_type))
except ValueError:
metrics = {}
# update cache
LAST_METRICS = copy.deepcopy(METRICS)
METRICS = {
'time': time.time(),
'data': metrics
}
return [METRICS, LAST_METRICS]
def get_value(name):
"""Return a value for the requested metric"""
# get metrics
metrics = get_metrics()[0]
# get value
name = name[len(NAME_PREFIX):] # remove prefix from name
try:
result = metrics['data'][name]
except StandardError:
result = 0
return result
def get_rate(name):
"""Return change over time for the requested metric"""
# get metrics
[curr_metrics, last_metrics] = get_metrics()
# get rate
name = name[len(NAME_PREFIX):] # remove prefix from name
try:
rate = float(curr_metrics['data'][name] - last_metrics['data'][name]) / \
float(curr_metrics['time'] - last_metrics['time'])
if rate < 0:
rate = float(0)
except StandardError:
rate = float(0)
return rate
def get_opcounter_rate(name):
"""Return change over time for an opcounter metric"""
master_rate = get_rate(name)
repl_rate = get_rate(name.replace('opcounters_', 'opcountersRepl_'))
return master_rate + repl_rate
def get_globalLock_ratio(name):
"""Return the global lock ratio"""
try:
result = get_rate(NAME_PREFIX + 'globalLock_lockTime') / \
get_rate(NAME_PREFIX + 'globalLock_totalTime') * 100
except ZeroDivisionError:
result = 0
return result
def get_indexCounters_btree_miss_ratio(name):
"""Return the btree miss ratio"""
try:
result = get_rate(NAME_PREFIX + 'indexCounters_btree_misses') / \
get_rate(NAME_PREFIX + 'indexCounters_btree_accesses') * 100
except ZeroDivisionError:
result = 0
return result
def get_connections_current_ratio(name):
"""Return the percentage of connections used"""
try:
result = float(get_value(NAME_PREFIX + 'connections_current')) / \
float(get_value(NAME_PREFIX + 'connections_available')) * 100
except ZeroDivisionError:
result = 0
return result
def get_slave_delay(name):
"""Return the replica set slave delay"""
# get metrics
metrics = get_metrics()[0]
# no point checking my optime if i'm not replicating
if 'rs_status_myState' not in metrics['data'] or metrics['data']['rs_status_myState'] != 2:
result = 0
# compare my optime with the master's
else:
master = {}
slave = {}
try:
for member in metrics['data']['rs_status_members']:
if member['state'] == 1:
master = member
if member['name'].split(':')[0] == socket.getfqdn():
slave = member
result = max(0, master['optime']['t'] - slave['optime']['t']) / 1000
except KeyError:
result = 0
return result
def get_asserts_total_rate(name):
"""Return the total number of asserts per second"""
return float(reduce(lambda memo,obj: memo + get_rate('%sasserts_%s' % (NAME_PREFIX, obj)),
['regular', 'warning', 'msg', 'user', 'rollovers'], 0))
def metric_init(lparams):
"""Initialize metric descriptors"""
global PARAMS
# set parameters
for key in lparams:
PARAMS[key] = lparams[key]
# define descriptors
time_max = 60
groups = 'mongodb'
descriptors = [
{
'name': NAME_PREFIX + 'opcounters_insert',
'call_back': get_opcounter_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Inserts/Sec',
'slope': 'both',
'format': '%f',
'description': 'Inserts',
'groups': groups
},
{
'name': NAME_PREFIX + 'opcounters_query',
'call_back': get_opcounter_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Queries/Sec',
'slope': 'both',
'format': '%f',
'description': 'Queries',
'groups': groups
},
{
'name': NAME_PREFIX + 'opcounters_update',
'call_back': get_opcounter_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Updates/Sec',
'slope': 'both',
'format': '%f',
'description': 'Updates',
'groups': groups
},
{
'name': NAME_PREFIX + 'opcounters_delete',
'call_back': get_opcounter_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Deletes/Sec',
'slope': 'both',
'format': '%f',
'description': 'Deletes',
'groups': groups
},
{
'name': NAME_PREFIX + 'opcounters_getmore',
'call_back': get_opcounter_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Getmores/Sec',
'slope': 'both',
'format': '%f',
'description': 'Getmores',
'groups': groups
},
{
'name': NAME_PREFIX + 'opcounters_command',
'call_back': get_opcounter_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Commands/Sec',
'slope': 'both',
'format': '%f',
'description': 'Commands',
'groups': groups
},
{
'name': NAME_PREFIX + 'backgroundFlushing_flushes',
'call_back': get_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Flushes/Sec',
'slope': 'both',
'format': '%f',
'description': 'Flushes',
'groups': groups
},
{
'name': NAME_PREFIX + 'mem_mapped',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'MB',
'slope': 'both',
'format': '%u',
'description': 'Memory-mapped Data',
'groups': groups
},
{
'name': NAME_PREFIX + 'mem_virtual',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'MB',
'slope': 'both',
'format': '%u',
'description': 'Process Virtual Size',
'groups': groups
},
{
'name': NAME_PREFIX + 'mem_resident',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'MB',
'slope': 'both',
'format': '%u',
'description': 'Process Resident Size',
'groups': groups
},
{
'name': NAME_PREFIX + 'extra_info_page_faults',
'call_back': get_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Faults/Sec',
'slope': 'both',
'format': '%f',
'description': 'Page Faults',
'groups': groups
},
{
'name': NAME_PREFIX + 'globalLock_ratio',
'call_back': get_globalLock_ratio,
'time_max': time_max,
'value_type': 'float',
'units': '%',
'slope': 'both',
'format': '%f',
'description': 'Global Write Lock Ratio',
'groups': groups
},
{
'name': NAME_PREFIX + 'indexCounters_btree_miss_ratio',
'call_back': get_indexCounters_btree_miss_ratio,
'time_max': time_max,
'value_type': 'float',
'units': '%',
'slope': 'both',
'format': '%f',
'description': 'BTree Page Miss Ratio',
'groups': groups
},
{
'name': NAME_PREFIX + 'globalLock_currentQueue_total',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'Operations',
'slope': 'both',
'format': '%u',
'description': 'Total Operations Waiting for Lock',
'groups': groups
},
{
'name': NAME_PREFIX + 'globalLock_currentQueue_readers',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'Operations',
'slope': 'both',
'format': '%u',
'description': 'Readers Waiting for Lock',
'groups': groups
},
{
'name': NAME_PREFIX + 'globalLock_currentQueue_writers',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'Operations',
'slope': 'both',
'format': '%u',
'description': 'Writers Waiting for Lock',
'groups': groups
},
{
'name': NAME_PREFIX + 'globalLock_activeClients_total',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'Clients',
'slope': 'both',
'format': '%u',
'description': 'Total Active Clients',
'groups': groups
},
{
'name': NAME_PREFIX + 'globalLock_activeClients_readers',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'Clients',
'slope': 'both',
'format': '%u',
'description': 'Active Readers',
'groups': groups
},
{
'name': NAME_PREFIX + 'globalLock_activeClients_writers',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'Clients',
'slope': 'both',
'format': '%u',
'description': 'Active Writers',
'groups': groups
},
{
'name': NAME_PREFIX + 'connections_current',
'call_back': get_value,
'time_max': time_max,
'value_type': 'uint',
'units': 'Connections',
'slope': 'both',
'format': '%u',
'description': 'Open Connections',
'groups': groups
},
{
'name': NAME_PREFIX + 'connections_current_ratio',
'call_back': get_connections_current_ratio,
'time_max': time_max,
'value_type': 'float',
'units': '%',
'slope': 'both',
'format': '%f',
'description': 'Percentage of Connections Used',
'groups': groups
},
{
'name': NAME_PREFIX + 'slave_delay',
'call_back': get_slave_delay,
'time_max': time_max,
'value_type': 'uint',
'units': 'Seconds',
'slope': 'both',
'format': '%u',
'description': 'Replica Set Slave Delay',
'groups': groups
},
{
'name': NAME_PREFIX + 'asserts_total',
'call_back': get_asserts_total_rate,
'time_max': time_max,
'value_type': 'float',
'units': 'Asserts/Sec',
'slope': 'both',
'format': '%f',
'description': 'Asserts',
'groups': groups
}
]
return descriptors
def metric_cleanup():
"""Cleanup"""
pass
# the following code is for debugging and testing
if __name__ == '__main__':
descriptors = metric_init(PARAMS)
while True:
for d in descriptors:
print (('%s = %s') % (d['name'], d['format'])) % (d['call_back'](d['name']))
print ''
time.sleep(METRICS_CACHE_TTL)
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