[collectd] GenericJMX enhancement

[Jason Stelzer]

Following up my own post... :)

Turns out you can get this functionality with the filter chains built
in to collectd. I had no idea.

On Mon, May 14, 2012 at 3:34 PM, Jason Stelzer <jason.stelzer at gmail.com> wrote:
> We are using the GenericJMX plugin to monitor Tomcat.
>
> This produces directory names like: GenericJMX-"http-apr-7084".
>
> I have a visualization frontend that essentially just walks trees of
> rrd files and generates graphs from them. I could translate names
> there, but I would rather see the filesystem have 'clean' names.
>
> It might be nice to add a toggle so that you can normalize the names.
> Is there a preferred approach to this? Should the collector plugin be
> responsible for maintaining a mapping to 'actual' and 'cleaned up'
> names? There are other metrics that contain whitespace, brackets,
> quotes and other noise.
>
> To this end, I modified GenericJMXConfMBean.java and added 2
> configuration properties:
>
> MaskChars is a regex of characters to mask.
> ReplacementString is a string to replace the masked characters with.
>
> A sample configuration could look like this:
>
>  <Plugin "GenericJMX">
>    # Memory usage by memory pool.
>    <MBean "appname_tomcat/memory_pool">
>      ObjectName "java.lang:type=MemoryPool,*"
>      InstancePrefix "appname_tomcat-memory_pool-"
>      InstanceFrom "name"
>      MaskChars "[ ,\\%\\[\\]\"]"
>      ReplacementString ""
>      <Value>
>        Type "memory"
>        #InstancePrefix ""
>        #InstanceFrom ""
>        Table true
>        Attribute "Usage"
>      </Value>
>    </MBean>
> </Plugin>
>
>
> What this essentially means is the following:
>
> * When you replace substrings, it's expected you do so in a way that
> is distinct and stable.
> * The stats are sent to the collectd system such that the names are 'clean'.
> * If you do not specify these directives, the system behaves as it did before.
>
> Would anyone else find this feature convenient? Would you like me to
> submit a patch?
> --
> J.



-- 
J.