Munin contributed plugins

#!/usr/bin/python

"""

Plugin to monitor ArangoDB  servers. It works with the new server statistics 

interface of ArangoDB 1.3. Not every value seems senseful, but there are

nice graphs generated...

Author: Ralf Geschke <ralf@kuerbis.org>

Version: 2013062601

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.  If not, see <http://www.gnu.org/licenses/>.

Usage:

        - Link or copy to /etc/munin/plugins

        - To enable extra graphs, also link to one or more of the

        possible links (given below)

        - Then restart munin-node

Links possible:

        arangodb_conn                   HTTP client connections

        arangodb_time_total		Total request/queue/connection time

        arangodb_bytes_total		Total sent/received bytes 

Configuration:

        - No configuration required. Just enable the admin interface of ArangoDB.

Thanks to the authors of other Python munin plugins. I've used some of 

them as inspiring example. 

Possible todos:

        - support of munin-like configuration parameters

        - add more statistics

"""

from os.path import basename

import urllib2

import sys

try:

    import json

except ImportError:

    import simplejson as json

def getServerStatus(group):

    raw = urllib2.urlopen( "http://127.0.0.1:8529/_admin/statistics" ).read()

    return json.loads( raw )[group]

def doData(plugin_name):

    if plugin_name == 'arangodb_conn':

        print "connections.value " + str( getServerStatus('client')["httpConnections"] )

    elif plugin_name== 'arangodb_time_total':

        data = getServerStatus('client')

        timeTotal = data['totalTime']['sum'] 

        timeConnection = data['connectionTime']['sum'] 

        timeRequest = data['requestTime']['sum'] 

        timeQueue = data['queueTime']['sum'] 

        print "total.value " + str(int(round(timeTotal)))

        print "connection.value " + str(int(round(timeConnection)))

        print "request.value " + str(int(round(timeRequest)))

        print "queue.value " + str(int(round(timeQueue)))

    elif plugin_name== 'arangodb_bytes_total':

        data = getServerStatus('client')

        bytesReceived = data['bytesReceived']['sum']

        bytesSent = data['bytesSent']['sum']

        print "received.value " + str(int(round(bytesReceived)))

        print "sent.value " + str(int(round(bytesSent)))

    else:

        pass

def doConfig(plugin_name):

    if plugin_name == 'arangodb_conn':

        print "graph_title ArangoDB current connections"

        print "graph_args --base 1000 -l 0"

        print "graph_vlabel connections"

        print "graph_category db"

        print "connections.label connections"

    elif plugin_name == 'arangodb_time_total':

        print "graph_title ArangoDB total time"

        print "graph_args --base 1000 -l 0"

        print "graph_vlabel seconds"

        print "graph_category db"

        print "total.label total"

        print "connection.label connection"

        print "request.label request"

        print "queue.label queue"

    elif plugin_name == 'arangodb_bytes_total':

        print "graph_title ArangoDB total bytes"

        print "graph_args --base 1024"

        print "graph_vlabel total bytes received (-) / sent (+)"

        print "graph_category db"

        print "graph_order received sent"

        print "received.graph no"

        print "received.draw LINE2"

        print "received.type DERIVE"

        print "received.min 0"

        print "received.label Bytes received"

        print "received.cdef received,8,*"

        print "sent.draw LINE2"

        print "sent.type DERIVE"

        print "sent.min 0"

        print "sent.label bytes"

        print "sent.cdef sent,8,*"

        print "sent.negative received"

    else:

        pass

plugin_name = basename(sys.argv[0])

if __name__ == "__main__":

    if len(sys.argv) > 1 and sys.argv[1] == "config":

        doConfig(plugin_name)

    else:

        doData(plugin_name)