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Posted to users@tomcat.apache.org by Miguel González Castaños <mi...@yahoo.es> on 2012/04/02 21:02:42 UTC
Bash script for monitoring status of the Tomcat server
Dear all,
Recently we had to restart our standalone Tomcat server because
apparently the 150 max threads setting was not enough. I have been
googling a bit and it seems it's possible to monitor the performance of
the server and also get the numbers when the connection pool or the
threads are about to be exhausted.
I would like to run a bash script to monitor these values and warn me
if the reach a certain level. Also a tool that generates some graphs
would be great.
I haven't found anything googling. Any ideas of how to build my own
script?
Regards,
Miguel
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Re: Bash script for monitoring status of the Tomcat server
Posted by Leon Rosenberg <ro...@gmail.com>.
or...
you take moskito which comes with buildin threadmonitoring, configure
your thresholds, and watch logfile with your bashscript for
RED,YELLOW,ORANGE messages...
regards
Leon
P.S.
http://moskito.anotheria.net/moskitodemo/mui/mskThresholds
On Tue, Apr 3, 2012 at 1:20 AM, Darryl Lewis <da...@unsw.edu.au> wrote:
> Try JavaMelody. It does a lot of monitoring straight out of the 'box'.
> For there, it is a small step to use wget to screen scrape values from Melody and send emails once they exceed a threshold.
>
> -----Original Message-----
> From: Christopher Schultz [mailto:chris@christopherschultz.net]
> Sent: Tuesday, 3 April 2012 5:50 AM
> To: Tomcat Users List
> Subject: Re: Bash script for monitoring status of the Tomcat server
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Chuck,
>
> On 4/2/12 3:28 PM, Caldarale, Charles R wrote:
>>> From: Miguel González Castaños
>>> [mailto:miguel_3_gonzalez@yahoo.es] Subject: Bash script for
>>> monitoring status of the Tomcat server
>>
>>> I would like to run a bash script to monitor these values and
>>> warn me if the reach a certain level. Also a tool that generates
>>> some graphs would be great.
>>
>> Not quite sure how you can put "bash" and "graphs" together, but
>> nonetheless...
>>
>> 2) Use wget or curl to access Tomcat's text-mode manager app and
>> parse the results.
>
> +1 -- and use the JMXProxyServlet, which lets you query specific
> components like the connectors. We've been doing this lately to great
> success.
>
> You can use a tool like rrdtool to store the data and generate
> nice-looking graphs over time. You can also easily use the same feed
> to do real-time monitoring using a tool like Nagios, Ichinga, etc.
>
>> 3) Use a command-line JMX tool like jmxsh
>> (http://code.google.com/p/jmxsh/) to extract information and parse
>> out whatever you want.
>
> While this is a tempting idea, when you start probing many different
> values via JMX, you'll find that starting a dozen JVMs and connecting
> via JMX starts to strain the server unnecessarily. That's why I
> recommend using JMXProxyServlet -- you get the power of JMX without
> actually making a JMX connection.
>
> - -chris
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RE: Bash script for monitoring status of the Tomcat server
Posted by Darryl Lewis <da...@unsw.edu.au>.
Try JavaMelody. It does a lot of monitoring straight out of the 'box'.
For there, it is a small step to use wget to screen scrape values from Melody and send emails once they exceed a threshold.
-----Original Message-----
From: Christopher Schultz [mailto:chris@christopherschultz.net]
Sent: Tuesday, 3 April 2012 5:50 AM
To: Tomcat Users List
Subject: Re: Bash script for monitoring status of the Tomcat server
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Chuck,
On 4/2/12 3:28 PM, Caldarale, Charles R wrote:
>> From: Miguel González Castaños
>> [mailto:miguel_3_gonzalez@yahoo.es] Subject: Bash script for
>> monitoring status of the Tomcat server
>
>> I would like to run a bash script to monitor these values and
>> warn me if the reach a certain level. Also a tool that generates
>> some graphs would be great.
>
> Not quite sure how you can put "bash" and "graphs" together, but
> nonetheless...
>
> 2) Use wget or curl to access Tomcat's text-mode manager app and
> parse the results.
+1 -- and use the JMXProxyServlet, which lets you query specific
components like the connectors. We've been doing this lately to great
success.
You can use a tool like rrdtool to store the data and generate
nice-looking graphs over time. You can also easily use the same feed
to do real-time monitoring using a tool like Nagios, Ichinga, etc.
> 3) Use a command-line JMX tool like jmxsh
> (http://code.google.com/p/jmxsh/) to extract information and parse
> out whatever you want.
While this is a tempting idea, when you start probing many different
values via JMX, you'll find that starting a dozen JVMs and connecting
via JMX starts to strain the server unnecessarily. That's why I
recommend using JMXProxyServlet -- you get the power of JMX without
actually making a JMX connection.
- -chris
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Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
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aKIAnibgy+FJlo2Qcr87iOE6+43EP+gR
=NIfs
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Re: Bash script for monitoring status of the Tomcat server
Posted by Christopher Schultz <ch...@christopherschultz.net>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Chuck,
On 4/2/12 3:28 PM, Caldarale, Charles R wrote:
>> From: Miguel González Castaños
>> [mailto:miguel_3_gonzalez@yahoo.es] Subject: Bash script for
>> monitoring status of the Tomcat server
>
>> I would like to run a bash script to monitor these values and
>> warn me if the reach a certain level. Also a tool that generates
>> some graphs would be great.
>
> Not quite sure how you can put "bash" and "graphs" together, but
> nonetheless...
>
> 2) Use wget or curl to access Tomcat's text-mode manager app and
> parse the results.
+1 -- and use the JMXProxyServlet, which lets you query specific
components like the connectors. We've been doing this lately to great
success.
You can use a tool like rrdtool to store the data and generate
nice-looking graphs over time. You can also easily use the same feed
to do real-time monitoring using a tool like Nagios, Ichinga, etc.
> 3) Use a command-line JMX tool like jmxsh
> (http://code.google.com/p/jmxsh/) to extract information and parse
> out whatever you want.
While this is a tempting idea, when you start probing many different
values via JMX, you'll find that starting a dozen JVMs and connecting
via JMX starts to strain the server unnecessarily. That's why I
recommend using JMXProxyServlet -- you get the power of JMX without
actually making a JMX connection.
- -chris
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aKIAnibgy+FJlo2Qcr87iOE6+43EP+gR
=NIfs
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RE: Bash script for monitoring status of the Tomcat server
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Miguel González Castaños [mailto:miguel_3_gonzalez@yahoo.es]
> Subject: Bash script for monitoring status of the Tomcat server
> I would like to run a bash script to monitor these values and warn
> me if the reach a certain level. Also a tool that generates some
> graphs would be great.
Not quite sure how you can put "bash" and "graphs" together, but nonetheless...
1) Use JConsole or VisualVM to graphically monitor what's going on inside Tomcat and the JVM via JMX. (Obviously not a bash script, but it's the easiest thing to do.)
2) Use wget or curl to access Tomcat's text-mode manager app and parse the results.
3) Use a command-line JMX tool like jmxsh (http://code.google.com/p/jmxsh/) to extract information and parse out whatever you want.
4) Use one of the enhanced versions of Tomcat (e.g., tc Server) that includes automatic monitoring and notification.
- Chuck
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