hyperic-hq-discuss

[Hyperic-hq-discuss] Script service runs okay but shows as shows unavailable

[Murray B. <hq-...@hy...>]

I have defined a very simple script plug-in which just returns a single value (number of file descriptors held by a process). It returns the value correctly but gets marked as unavailable. Given that the value is returned and the execution runs in under a second I can't see why it would be marked as unavailable.

I have attached screenshots of the script definition and the metrics returned. 

Thanks .  . Murray

Re: [Hyperic-hq-discuss] Script service runs okay but shows as shows unavailable

[Noah S. <noa...@hy...>]

There is an easier way to do it. 

Create a new "Process" service for your process and turn on the Open File Descriptors metric.

Re: [Hyperic-hq-discuss] Script service runs okay but shows as shows unavailable

[Noah S. <noa...@hy...>]

The Process Service trick was recently discussed in this thread:

http://forums.hyperic.com/jiveforums/message.jspa?messageID=5380

Re: [Hyperic-hq-discuss] Script service runs okay but shows as shows unavailable

[Murray B. <hq-...@hy...>]

Thanks. That's a useful idea. I'm really just using this to test the script plug-in rather than to get anything useful. So my concern is not to get the value but why Hyperic marks it as unavailable even though it clearly works.

Although my script actually does a little more than just get the file descriptors for a process. It totals the file descriptors for all the processes for a given web server. This gives us a rough guide as to the number of connections.

Thanks . . . Murray

Re: [Hyperic-hq-discuss] Script service runs okay but shows as shows unavailable

[Ryan M. <rm...@hy...>]

Hi Murray,

The script plugin will take the process exit code to determine the availability and the first value seen on stdout as the result value.  For your plugin it should do something like:

echo $DESCRIPTORS
return 0;

Maybe if you attach your script we can provide more info on what is going wrong.  The process service docs have more info: http://support.hyperic.com/confluence/display/DOCSHQ30/Script+Plugin

As a side note for those who are interested, HQ can gather stats on a group of processes as well.  We don't support adding up all the file descriptors, but maybe that's something that Doug can add.  The Multi-process docs have all the supported aggregate metrics:

http://support.hyperic.com/confluence/display/DOCSHQ30/MultiProcess+service

As an example, entering the PTQL query CredName.Username.eq=rmorgan would give info on all processes owned by me.  The SIGAR docs have more info on how to construct these queries.

http://support.hyperic.com/confluence/display/SIGAR/PTQL

-Ryan

Re: [Hyperic-hq-discuss] Script service runs okay but shows as shows unavailable

[Murray B. <hq-...@hy...>]

I tried explicitly setting the return code but it still shows as unavailable. However a scripting guru I am not. The script I'm running is:
#!/bin/sh
hostname=`hostname`
for w in https-www-test
do
   pids=`ps -ef | grep $w | grep webservd | grep -v wdog | awk '{print $2}'`
   net=0
   for pid in $pids
   do
      cd /proc/$pid/fd
      count=`ls| wc -l | sed 's/ //g'`
      net=`expr $net + $count`
   done
   echo "$net"
done
exit 0

When I run it manually it looks like:
ecsydtst03$ ./filedescriptors.sh
359
ecsydtst03$ 

There are some superfluous bits in here because it has been roughly cut down for the purposes of testing.

Thanks . . . Murray