[hobbit] Accessing "client data" from a server side ext script? (Re: [hobbit] Alerting on number of times a keyword appers in a logfile?)

[Charles Jones]

Writing client-side scripts is difficult in my environment because I 
have dozens of servers whose hobbit directories are on a shared SAN, so 
for any client-side script that needs to only run on a few hosts, I have 
to put checks in to make sure that $HOSTNAME is equal to the hosts I 
want it to run on.  Also, the builtin linecount function is already 
sending the counts for the keywords to the hobbit server, so why run 
another process on the client to do the same thing when the server 
already has the data.

Since my last email I have figured out how to access the client data 
from the server.  In my case this is:

./bb 127.0.0.1 "clientlog prod-web-12 
section=linecount:/apps/apache/logs/access_main_log"
Which returns:
[linecount:/apps/apache/logs/access_main_log]
SessionTimeouts: 1756

So now I can make a server side ext script which processes the latest 
linecounts and sends alerts if they exceed a certain threshold.  
Hopefully Henrik will add a more graceful solution for this in a future 
version of Hobbit.

-Charles



Hubbard, Greg L wrote:
> Use CLIENT side.  Much easier.  Don't try to leverage what the client 
> is already doing.
>
>     ------------------------------------------------------------------------
>     *From:* Charles Jones [mailto:jonescr at cisco.com]
>     *Sent:* Monday, December 11, 2006 1:09 PM
>     *To:* hobbit at hswn.dk
>     *Subject:* [hobbit] Accessing "client data" from a server side ext
>     script? (Re: [hobbit] Alerting on number of times a keyword appers
>     in a logfile?)
>
>     After searching the Hobbit mailing list, I believe the answer to
>     this question is "no". All I found is mention of how Henrik first
>     created the linecount functionality
>     (http://www.hswn.dk/hobbiton/2006/06/msg00084.html).
>
>     So it looks like I will have to implement this myself.  I'm
>     thinking this would be easiest to do as a *server* side ext
>     script, rather than client, since I am using the linecount option,
>     the hobbit client is already sending the number of times the
>     keyword appears in the /client data/.  Here's a snippet of my
>     client data message for a particular host:
>
>     [linecount:/apps/apache/logs/access_main_log]
>     SessionTimeouts: 1683
>
>     *So I guess my question is now, how can I access client data for a
>     host from a server side ext script?*
>     I tried doing a recursive grep for "Session" in the data and tmp
>     directories, and found nothing?
>
>     -Charles
>
>     Charles Jones wrote:
>>     Is this possible without an ext script?
>>
>>     -Charles
>

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