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63095 Views 6 Replies Latest reply: Nov 11, 2009 10:43 PM by guyverix RSS
khalavak Newbie
khalavak
3 posts since
Apr 7, 2009
Currently Being Moderated

Nov 11, 2009 3:13 AM

Zenoss SNMP graphs

Hello,

I am wondering why my Zenoss installation shows SNMP traffic throughput data polled from switches with gaps:traffic-graph.png

It seems to work ok when polling packets througput:

 

packets-graph.png

Any ideas on why that happens and what can be done to get graphs without gaps?

 

Best regards,

Kim Halavakoski

  • majikman Rank: White Belt
    majikman
    39 posts since
    Oct 5, 2009
    Currently Being Moderated
    1. Nov 11, 2009 4:08 PM (in response to khalavak)
    Re: Zenoss SNMP graphs
    I'm actually having that same problem with my switches but its even worse. My throughput graphs are almost useless because of that.throughput.png
  • Ryan Matte ZenossMaster
    Ryan Matte
    653 posts since
    Mar 26, 2009
    Currently Being Moderated
    2. Nov 11, 2009 4:12 PM (in response to majikman)
    Re: Zenoss SNMP graphs
    I have a bit of that on mine too.  It's not as bad as that but it still makes the graphs look bad.  Anyone know of a fix for this?
  • Ryan Matte ZenossMaster
    Ryan Matte
    653 posts since
    Mar 26, 2009
    Currently Being Moderated
    3. Nov 11, 2009 4:20 PM (in response to khalavak)
    Re: Zenoss SNMP graphs
    The consensus in the #zenoss IRC channel is that this is an issue with Zenoss 2.4.x and appears to possibly be fixed in 2.5.
  • khalavak Newbie
    khalavak
    3 posts since
    Apr 7, 2009
    Currently Being Moderated
    4. Nov 11, 2009 4:29 PM (in response to khalavak)
    Re: Zenoss SNMP graphs

    Hello,

    I found some threads that suggested that one should do one of the following:

     

    1. Increase the max value of the rrd-database to a 64bit value.

    2. More frequent SNMP polling so that the value does not overflow.

    3. Make some transforms on the values

     

    So I did that for a couple of my graphs but it did nothing:

     

    [root@cbszensrv01 interfaces]# /opt/zenoss/bin/rrdtool info BD-8810\ Port\ 10_5/ifInOctets_ifInOctets.rrd |grep ds

    ds[ds0].type = "DERIVE"

    ds[ds0].minimal_heartbeat = 900

    ds[ds0].min = 0.0000000000e+00

    ds[ds0].max = NaN

    ds[ds0].last_ds = "208516361"

    ds[ds0].value = 1.8328077596e+04

    ds[ds0].unknown_sec = 0

    [root@cbszensrv01 interfaces]# /opt/zenoss/bin/rrdtool tune BD-8810\ Port\ 5_1/ifInOctets_ifInOctets.rrd --maximum ds0:18446744073709551616

    [root@cbszensrv01 interfaces]# /opt/zenoss/bin/rrdtool info BD-8810\ Port\ 10_5/ifInOctets_ifInOctets.rrd |grep ds
    ds[ds0].type = "DERIVE"
    ds[ds0].minimal_heartbeat = 900
    ds[ds0].min = 0.0000000000e+00
    ds[ds0].max = 1.8446744074e+19
    ds[ds0].last_ds = "359156612"
    ds[ds0].value = NaN
    ds[ds0].unknown_sec = 154
    The max value is now a lot bigger and should not overflow as described in this thread: message/9681#9681
    However, the graphs still have gaps, so the next step is to start snmp-polling more frequent so that the counter doesn't overflow...
    I will try some more and report back!
    Regards,
    Kim H
  • khalavak Newbie
    khalavak
    3 posts since
    Apr 7, 2009
    Currently Being Moderated
    5. Nov 11, 2009 4:55 PM (in response to khalavak)
    Re: Zenoss SNMP graphs

    Great, upgraded to 2.5 and now its completely fucked. Just getting "server connection errors". zenjobs, zenping and zenactions are not running...so i DONT RECOMMEND upgrading to 2.4...now looking for some threads about migration/upgrade problems but have not found anything useful yet...

     

     

     

    [root@cbszensrv01 log]# /etc/init.d/zenoss status

    Daemon: zeoctl program running; pid=15812

    Daemon: zopectl program running; pid=15819

    Daemon: zenhub program running; pid=15858

    Daemon: zenjobs not running

    Daemon: zenping not running

    Daemon: zensyslog program running; pid=15993

    Daemon: zenstatus program running; pid=15999

    Daemon: zenactions not running

    Daemon: zentrap program running; pid=16125

    Daemon: zenmodeler program running; pid=16130

    Daemon: zenperfsnmp program running; pid=16164

    Daemon: zencommand program running; pid=16200

    Daemon: zenprocess program running; pid=16254

    Daemon: zenwin program running; pid=16336

    Daemon: zeneventlog program running; pid=16398

  • guyverix ZenossMaster
    guyverix
    846 posts since
    Jul 10, 2007
    Currently Being Moderated
    6. Nov 11, 2009 10:43 PM (in response to khalavak)
    Re: Zenoss SNMP graphs

    I (virtually) guarentee that this problem is due to the known issue with using 32 bit integers.  I am guessing that your graphs that are under say 30 MB/s are not showing these graph problems as badly.  The problem is that the counters are rolling too quickly.  If your devices support 64bit ethernet interface counters, use those (Juniper does by default, donno about other vendors though.)

     

    You may have to blow away your RRD datafiles to get the graphing to start working correctly..

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