custom script

[Martinus Nel]

Andreas,

Thank you.  Yes, my bad I tested with root.  Normally users such as 
nagios is set on /bin/false...

I don't fully understand the line you suggested:

[ -f "$LOG_FILE" ] || (echo "CRITICAL - $LOG_FILE is not a file"; exit 2)

Martinus.

Andreas Ericsson wrote:

> Martinus Nel wrote:
>
>> Dear all,
>>
>> I created a custom check_log script, but I have a minor problem.
>>
>> Attached is the script.
>>
>>  From the machine that the script resides, all is ok.
>>
>> NRPE config:
>> command[check_log_test]=/usr/local/nagios/check_logs rel1.repost.Aug2604
>>
>> Output from machine running NRPE:
>>
>> # /usr/local/nagios/check_logs rel1.repost.Aug2604
>> *** Repost of all pending candidates started at 10:00:01 PM *** : *** 
>> Repost finished at 10:27:49 PM ***
>> #
>>
>> Good.
>>
>
> Not good. If you're running it as root it just won't behave as it will 
> when NRPE runs it. Never, ever test anything as the root user. It just 
> won't give you th right results.
>
>> Output from machine running Nagios:
>>
>> # /usr/lib/nagios/plugins/check_nrpe -H xxx.xxx.xxx.xxx -p 5666 -c 
>> check_log_test
>> File does not exist.
>>
>> Not good.
>>
>
> Which goes to prove my point.
>
> Are you sure the nrpe pseudo-user has permissions to grep the files in 
> /home/admin/logs?
>
> You can also add a stupid line to the script to catch possible 
> argument distortion.
> [ -f "$LOG_FILE" ] || (echo "CRITICAL - $LOG_FILE is not a file"; exit 2)
>
>> The standard checks work all good, so I know there is nothing wrong 
>> with nagios / NRPE.
>>
>> I had a look at the stock check_log, but could not find any help there.
>> Any help appreciated.
>>
>>
>> ------------------------------------------------------------------------
>>
>> #!/bin/sh
>>
>> # Custom script for Nagios to monitor rel1 log files
>>
>> # Data that we want to extract from the logs:
>> #     start and end time
>> #    any errors
>>
>> # Define possible exit status.
>> OK=0
>> WARNING=1
>> CRITICAL=2
>> UNKNOWN=3
>>
>> # Make sure we get the right input.
>> if [ $# -ne 1 ]
>> then
>>         echo "Usage: $0 log_file_name."
>>         exit $UNKNOWN
>> fi
>>
>> LOG_FILE=/home/admin/logs/$1
>>
>> # Check if file exists.
>> if [ ! -f $LOG_FILE ]
>> then
>>     echo "File does not exist."
>>     exit $CRITICAL
>> fi
>>
>> # Get start and end time of log.
>> START_TIME=`grep "started at" $LOG_FILE`
>> END_TIME=`grep "finished at" $LOG_FILE`
>>
>> if [ "$START_TIME" = "" ] || [ "$END_TIME" = "" ]
>> then
>>     echo "No start or end time."
>>     exit $CRITICAL
>> fi
>>
>> # Find errors.
>> ERROR=`grep --ignore-case -e "ERROR" -e "Exception" $LOG_FILE`
>> if [ "$ERROR" != "" ]
>> then
>>     echo "Error found: $ERROR"
>>     exit $CRITICAL
>> fi
>>
>> # All is OK & send start & end time.
>> echo "$START_TIME : $END_TIME"
>> exit $OK
>
>


-- 
Martinus Nel
System Administrator
Scarce Skills Ltd.
http://www.scarceskills.com
Tel: +44 (0) 1633 225461

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