[hobbit] NFS and shared clientlaunch.cfg files

[Michael Dunne]

Thanks for the tips guys, much obliged!

Mike

On 8/16/07 12:49 PM, "Daniel Bourque" <dbourque at weatherdata.com> wrote:

> sup pimp ! nice to see you here.
> 
> you idea should work good, it would keep all machines from needlessly starting
> a script that justs exit. Thing is you'll have to create a clientlaunch.cfg
> file or simlink to the default one for each machine running hobbit.
> 
> Another Idea , similar to Charle Jone's idea, is to launch a wrapper script
> from clientlaunch.cfg. A wrapper called mycheck just looks for a script named
> mycheck.$BBHOSTNAME, exec's it if it exists or exits with 0.
> 
> more than one way to skin a cat , hobbit's like the swiss army of knife of
> system monitoring :)
> 
> 
> -Dan
> 
> Charles Jones wrote:
>>   I encountered this exact problem, with monitoring a few hundred servers
>> that had a common NFS filesystem. For the most part, Hobbit handles this
>> gracefully as it uses unique names for logfiles and such. I ran into problems
>> though when I wanted an extra script to run, but just on certain hosts. I
>> ended up just having the ext script check the hostname and exit gracefully if
>> it was not the host it should run on:
>>  HOSTNAME=`/bin/hostname`
>>  
>> if ! echo $HOSTNAME | egrep -q 'app-28|web-12|web-13|db-10' ; then
>>    exit 0
>> fi
>>  
>> What I would really like to see (and I posted this on the list before), is a
>> server-side configuration of what scripts or even commands to run on the
>> remote hosts. I doubt this will be implemented though, because too many
>> people view it as a security risk.  What I proposed was a config file with a
>> format something like:
>>  
>> <hostname> <script path> <interval>
>> example:
>> host1.domain.com /home/hobbit/client/ext/somescript.sh 5m
>>  
>> The above would instruct the hobbit client on host1.domain.com to run the
>> somescript.sh every 5 minutes.
>>  
>> Another way to do it is just use cron and run the script via bbcmd, but I
>> dont like things that run with hobbit to be able to run when Hobbit is not
>> running (if I have the client down for some reason, the cron would still
>> kickoff unless I also disabled it).
>>  
>> -Charles
>>  
>>  
>> Michael Dunne wrote:
>>>  
>>> Greetings fellow Hobbit-ers,
>>> 
>>> I was recently tasked with monitoring 100+ solaris systems. Feeling
>>> undaunted I reached into
>>> my trusty IT toolbox and pulled out one of my favorite tools, Hobbit. What I
>>> encountered is 
>>> as followed. 
>>> 
>>> The systems utilize NFS mounted directories. I installed the client files
>>> into /usr/local/
>>> hobbit/client and voila! they were available to all of my systems. The issue
>>> that I encountered
>>> was that I wished to run different external scripts per client, but with a
>>> "shared" clientlaunch
>>> file I could not see how to do this. (This is where I cringe as I suspect
>>> that my solution is
>>> rather naive) What I would up doing is modifying the runclient.sh file as
>>> reflected below:
>>> 
>>> 
>>> ~/client hobbit$ diff runclient.sh runclient.ren
>>> 79c79
>>> <               $0 --hostname="$MACHINEDOTS" stop
>>> ---
>>>   
>>>  
>>>>  
>>>>               $0 stop
>>>>     
>>>>  
>>>  
>>> 83c83
>>> <       $HOBBITCLIENTHOME/bin/hobbitlaunch --config=$HOBBITCLIENTHOME/etc/
>>> clientlaunch.cfg --log=$HOBBITCLIENTHOME/logs/clientlaunch.log --pidfile=
>>> $HOBBITCLIENTHOME/logs/clientlaunch.$MACHINEDOTS.pid
>>> ---
>>>   
>>>  
>>>>  
>>>>       $HOBBITCLIENTHOME/bin/hobbitlaunch --config=$HOBBITCLIENTHOME/etc/
>>>>     
>>>>  
>>>  
>>> $MACHINEDOTS.clientlaunch.cfg --log=$HOBBITCLIENTHOME/logs/
>>> $MACHINEDOTS.clientlaunch.log --pidfile=$HOBBITCLIENTHOME/logs/clientlaunch.
>>> $MACHINEDOTS.pid
>>> 102c102
>>> <               $0 --hostname="$MACHINEDOTS" stop
>>> ---
>>>   
>>>  
>>>>  
>>>>               $0 stop
>>>>     
>>>>  
>>>  
>>> 107c107
>>> <       $0 --hostname="$MACHINEDOTS" --os="$BBOSTYPE" start
>>> ---
>>>   
>>>  
>>>>  
>>>>       $0 start
>>>>     
>>>>  
>>>  
>>> My questions are as followed.
>>> 
>>> Has anyone encountered this specific issue before, and if so how did you
>>> address it?
>>> Does my, admittedly inelegant, solution pose any issues in relation to long
>>> term use? 
>>> 
>>> I searched the list and was unable to find anything specific to my issue.
>>> 
>>> 
>>> Thanks in advance for reading this missive.
>>> 
>>> 
>>> Best regards,
>>> 
>>> Mike
>>> 
>>> To unsubscribe from the hobbit list, send an e-mail to
>>> hobbit-unsubscribe at hswn.dk
>>>   
>>>  
>>  
> 



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