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From Edward Capriolo <>
Subject Re: JConsole/SSH tunneling tip
Date Wed, 01 Sep 2010 13:43:49 GMT
On Wed, Sep 1, 2010 at 9:03 AM, Matthew Conway <> wrote:
> If you need to tunnel jconsole to a remote cassandra instance, the SSH socks proxy (ssh
-D)is the easiest, least intrusive way.  More details:
> Matt
Matts approach makes good sense for a interactive JMX session.

RMI is fubar. All my cacti templates use JMX to pull data from hadoop,
cassandra,etc. Though it is easy enough to tunnel your system
tunneling your monitoring station is harder

I converted all my scripts that originally ran remotely with jmx, to
run locally on the host, and then I call them with nagios remote
plugin executor.

# tail -1 /etc/nagios/nrpe.cfg
command[run_caches]=/usr/lib64/nagios/plugins/ $ARG1$
$ARG2$ $ARG3$ $ARG4$ $ARG5$ $ARG6$

# /usr/lib/nagios/plugins/check_nrpe -H cdbsd01.xxxxxx -c run_caches
-a cdbsd01.hadoop.pvt 8585 dummyUser dummyPass  XXXXRowCache YYYYData
Size:1000003 Capacity:1000003 Hits:20770366 Requests:26687574

This lets me collect all the performance data over NRPE and avoids all
the hostname issues, nat, and port issues.


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