[mrtg] MRTG Script error

[Aleš]

SYED JAHANZAiB ~!~ AA Internet Cable.Network Services pravi:
> I am facing a littile problem in creating MRTG Graph for Disk I/O perfromance.
> I created script to collect read/write data by thie following script.
>  
> ################################
> #disk.sh
> #!/bin/bash
> Kbr=`iostat -x |grep sda | awk '{print $7}' |sed "s/[.]//"`
> Kbw=`iostat -x |grep sda | awk '{print $6}' |sed "s/[.]//"`
> echo $Kbr
> echo $Kbw
> ################################
> If I run disk.sh, it shows me following result which is ok
>
> 429
> 26
>
> My disk.cfg is as follows...
> ################################
> Target[disk]: `/usr/local/mrtg-2/bin/disk.sh`
> Title[disk]: Disk HDA I/O Utilization Report
> #Unscaled[disk]: dwym
> MaxBytes[disk]: 10240000
> PageTop[disk]: Disk I/O Utilization Report
> kmg[disk]: KB,MB,GB
> LegendI[disk]: Disk I/O KBread/sec
> LegendO[disk]: Disk I/O KBwrite/sec
> Legend1[disk]: Disk I/O KBread/sec
> Legend2[disk]: Disk I/O KBwrite/sec
> YLegend[disk]: Megabytes
> ShortLegend[disk]: &
> Options[disk]: growright,gauge,nopercent
> #################################
>  
> But when i set it in MRTG , it shows me follwing error and donot updatedisk Graph.
>  
> ##################
>  
> 2008-04-21 17:04:02 -- Started mrtg with config '/usr/local/mrtg-2/bin/mrtg.cfg'
>
> 2008-04-21 17:04:38 -- 2008-04-21 17:04:02: WARNING: Problem with External get '/usr/local/mrtg-2/bin/disk.sh':
>    Expected a Number for 'in' but got ''
>  
> 2008-04-21 17:04:38 -- 2008-04-21 17:04:02: WARNING: Problem with External get '/usr/local/mrtg-2/bin/disk.sh':
>    Expected a Number for 'out' but got ''
>  
> 2008-04-21 17:04:38 -- 2008-04-21 17:04:38: ERROR: Target[disk][_IN_] ' $target->[47]{$mode} ' did not eval into defined data
>
> 2008-04-21 17:04:38 -- 2008-04-21 17:04:38: ERROR: Target[disk][_OUT_] ' $target->[47]{$mode} ' did not eval into defined data
>
> #############################
>  
> What could be the error ???
>  
> Regards,
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>   
Maybe you should try:

iostat -x |grep sda | awk '{print $7}' | sed 's/[^[:digit:]]//g'

The result will be the same, but it is number for sure. :-)