[Xymon] Monitoring iostat performance

[Ford, Alan]

Hi Ben,
I have written a client program to capture the iostat details so that a backend process can display it.
I do it this way as I have custom client scripts for RHEL and solaris 9 and the use the same backend :-)

My client perl script works for RHEL 4, 5 and 6.

Add this section to clientlaunch.cfg on your client.

[fsio]
        ENVFILE $XYMONCLIENTHOME/etc/xymonclient.cfg
        CMD $XYMONCLIENTHOME/ext/xy-fsio_rhel.pl
        LOGFILE $XYMONCLIENTHOME/logs/xymonclient.log
        INTERVAL 5m


On you Xymon server:
Add this section to tasks.cfg

# "rrddata" updates RRD files with information that arrives as "data" messages.
[rrddata]
	ENVFILE /home/xymon/xymon/server/etc/xymonserver.cfg
	NEEDS xymond
	CMD xymond_channel --channel=data   --log=$XYMONSERVERLOGS/rrd-data.log xymond_rrd --rrddir=$XYMONVAR/rrd  \
            --extra-script=/home/xymon/server/ext/process_fsio.pl \
            --extra-tests=fsio


Add this to graphs.cfg

[fsio]
      FNPATTERN ^fsio,(.*).rrd
      TITLE Disk Read/Write
      YAXIS Stats 
      DEF:pb at RRDIDX@=@RRDFN@:pbusy:AVERAGE
      DEF:kr at RRDIDX@=@RRDFN@:kread_sec:AVERAGE
      DEF:kw at RRDIDX@=@RRDFN@:kwrite_sec:AVERAGE
      CDEF:pbn at RRDIDX@=pb at RRDIDX@,5,GT,pb at RRDIDX@,UNKN,IF
      COMMENT:DISK IO\: @RRDPARAM@ \:
      GPRINT:pbn at RRDIDX@:LAST:busy = %3.0lf%%\n
      AREA:kr at RRDIDX@#@COLOR@: 
      GPRINT:kr at RRDIDX@:LAST:kB Read/sec \: %5.0lf (cur)
      GPRINT:kr at RRDIDX@:MAX:\: %5.0lf (max)
      GPRINT:kr at RRDIDX@:MIN:\: %5.0lf (min)
      GPRINT:kr at RRDIDX@:AVERAGE:\: %5.0lf (avg)\n
      AREA:kw at RRDIDX@#@COLOR@: 
      GPRINT:kw at RRDIDX@:LAST:kB Write/sec\: %5.0lf (cur)
      GPRINT:kw at RRDIDX@:MAX:\: %5.0lf (max)
      GPRINT:kw at RRDIDX@:MIN:\: %5.0lf (min)
      GPRINT:kw at RRDIDX@:AVERAGE:\: %5.0lf (avg)\n

[fsio2]
      FNPATTERN ^fsio,(.*).rrd
      TITLE I/O Utilization
      YAXIS Stats
      DEF:p at RRDIDX@B=@RRDFN@:pbusy:AVERAGE
      DEF:p at RRDIDX@A=@RRDFN@:asvc_t:AVERAGE
      DEF:p at RRDIDX@W=@RRDFN@:wsvc_t:AVERAGE
      CDEF:p at RRDIDX@t=p at RRDIDX@B,5,GT,p at RRDIDX@B,UNKN,IF
      COMMENT:DISK IO\: @RRDPARAM@ \:
      GPRINT:p at RRDIDX@t:LAST:busy = %3.0lf%%\n
      AREA:p at RRDIDX@A#@COLOR@: 
      GPRINT:p at RRDIDX@A:LAST:asvc_t  \: %5.1lf (cur)
      GPRINT:p at RRDIDX@A:MAX: \: %5.1lf (max)
      GPRINT:p at RRDIDX@A:MIN: \: %5.1lf (min)
      GPRINT:p at RRDIDX@A:AVERAGE: \: %5.1lf (avg)\n
      LINE1:p at RRDIDX@W#@COLOR@: 
      GPRINT:p at RRDIDX@W:LAST:wsvc_t  \: %5.1lf (cur)
      GPRINT:p at RRDIDX@W:MAX: \: %5.1lf (max)
      GPRINT:p at RRDIDX@W:MIN: \: %5.1lf (min)
      GPRINT:p at RRDIDX@W:AVERAGE: \: %5.1lf (avg)\n



Add these in your xymonserver.cfg

TEST2RRD="fsio,fsio2"
GRAPHS="fsio::1,fsio::2"


And away you go :-)

Alan Ford
Senior Database Administrator
Com Serv - Information Communications and Technology
Stanwell Corporation Limited

www.stanwell.com


-----Original Message-----
From: Xymon [mailto:xymon-bounces at xymon.com] On Behalf Of Lists
Sent: Thursday, 30 January 2014 8:56 AM
To: xymon at xymon.com
Subject: [Xymon] Monitoring iostat performance

Recently, we had a publicly visible outtage as a result of one of our load balancers exceeding the IOPS capability of its system drives. We'd like to extend xymon (currently installed on CentOS6 /32 with defaults) so that it can monitor IOPS for all servers.

Specifically, we'd like to see wrqm/s and probably %util. What's the most straightforward way to accomplish this? The other alternative is to create some form of internal script, which is doable but not preferable if there's an off-the-shelf tool available.

-Ben
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