#!/usr/bin/env python
"""Thomas R. N. Jansson (tjansson@tjansson.dk)
16-MAY-2010
"""

# The SNMP traps for the NetApp filer can be found in
# /net/netappfiler/vol0/etc/mib/traps.dat if the filer is 
# NFS automounted mounted on server.
# Example: the SNMP id for cpuBusyTimePerCent is
# snmp.1.3.6.1.4.1.789.1.2.1.3.0 
# and retrival of this value is done by 
# snmpget -v 1 -c public netappfiler 1.3.6.1.4.1.789.1.2.1.3.0
#
# Requires snmpget and assumes public community.

import commands
import sys
import time

# Provided a servername and a snmpid it returns the value stripped of bogus information.
def snmpget(iservername,isnmpid):
    runcmd = 'snmpget -v 1 -c public ' + iservername + ' ' + isnmpid 
    output = commands.getoutput(runcmd)
    return output.split()[3]

# Calculates the bps by asking twice divided per second. 
def calcbps(iservername,isnmpid):
    val_first  = int(snmpget(iservername,isnmpid))
    time.sleep(1)
    val_second = int(snmpget(iservername,isnmpid))
    return str(val_second-val_first)

# The interface number corresponds to vif1 on my netapp
iface            = '8'
ifEntryDescr     = '1.3.6.1.2.1.2.2.1.2.'+iface
ifEntrySpeed     = '1.3.6.1.2.1.2.2.1.5.'+iface
ifEntryStatus    = '1.3.6.1.2.1.2.2.1.8.'+iface
ifEntryInOctets  = '1.3.6.1.2.1.2.2.1.10.'+iface
ifEntryOutOctets = '1.3.6.1.2.1.2.2.1.16.'+iface
servername       = sys.argv[0].split('_')[2]
ifacename        = snmpget(servername,ifEntryDescr)

if len(sys.argv) == 2 and sys.argv[1]  == "config":
    print 'graph_title Network usage on '+servername+' inteface '+ifacename
    print 'graph_order recv send'
    print 'graph_args --base 1000'
    print 'graph_vlabel bits in (-) / out (+) per \${graph_period}'
    print 'graph_category netapp'
    print 'graph_info This graph shows traffic for the '+ifacename+' network interface.'

    print 'recv.label recv'
    print 'recv.type DERIVE'
    print 'recv.graph no'
    print 'recv.cdef recv,8,*'
    print 'recv.max 2000000000'
    print 'recv.min 0'
    
    print 'send.info Bits sent/received by the '+ifacename+' interface.'
    print 'send.label bps'
    print 'send.type DERIVE'
    print 'send.negative recv'
    print 'send.cdef send,8,*'
    print 'send.max 2000000000'
    print 'send.min 0'
    sys.exit(0)

# Gathers info from the servers and gathers data
print 'send.value '+calcbps(servername,ifEntryOutOctets)
print 'recv.value '+str(int(calcbps(servername,ifEntryInOctets))*-1)