Nagios script output issue

[Jim Avery]

On 27 August 2010 06:26, newme me <allanm78 at gmail.com> wrote:
> Hi Folks,
>
> Nagios is acting a little weird for me, I have this external script which I
> hooked into Nagios, it merely does a curl/wget on a URL and returns the
> status based on string in the content/output. Initially for 2-3 hrs the
> script returns the right status and Nagios reports correctly i.e. OK, WARN,
> ERROR based on the exit from the script. After 2-3 hrs output which was (and
> should be) OK or WARN starts returning CRITICAL and the output line says
> "Application is" and not even "Application is ERROR" or "Application is
> FATAL".
>
> There is nothing in the logs to suggest what could be the problem. Have you
> experienced this before and let me know the corrective action. I am running
> Nagios on Mac OSX.
>
> Here is the script for the curious -
>
> #!/bin/bash
>
> read URL < "$1"
>
> STATUS=`curl -s $URL |grep summary|awk -F\" '{print $2}'`
> echo "Application is $STATUS"
> echo "curl $URL"
>
> case $STATUS in
> OK)
>    exit 0
>    ;;
> WARN)
>   exit 1
>   ;;
> ERROR)
>   exit 2
>   ;;
> FATAL)
>   exit 2
>   ;;
> *)
>   exit 2
>   ;;
> esac


I'm not sure.

The syntax:
  read URL < "$1"

seems a bit unusual.  Maybe I've misunderstood what it's doing, but
wouldn't this do the job more conventionally?:
  URL="$1"

Depending on how your application constructs the web page, it might
not be guaranteed that "summary" and the status will be on the same
line.

A small point, but I would normally use exit 3 rather than exit 2 for
that final *) catch-all case.

hth, but I'm not convinced it will!

I'm told that for this sort of thing webinject is good, but I haven't
tried it myself yet so am not sure how onerous it would be to install
and set up.

Jim

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