Srini,

To scale jboss instance, I'd recommend to create a new scaling metric just
as described in the following blog post:
http://blog.scalr.net/feature/2-1-feature-highlight-custom-scaling-metrics/
If your script detected unhealthy instance, you can terminate it in any
convenient way: by executing 'shutdown -h now' on it, by Scalr API or EC2
API. Second option is recommended, first is also good, the latter could
result into elevated time to bring up a replacement.

Regards,
Nick

On Sun, Mar 4, 2012 at 11:45, Srini <[email protected]>wrote:

> As previously mentioned in an earlier post, my app role actually runs
> Jboss. The Jboss instance could have crashed and become unresponsive. Given
> that it's an apache customized role, scalr is not even aware of this
> process.
>
> Assuming that I can monitor jboss from the scalr server via shell scripts,
> what is the best way to integrate this into scalr. There are two
> requirements:
>
> 1.  If the jboss app instances are all overloaded, a new instance should
> be spawned off based on some metric. I assume I will have to create a new
> scaling metric for this and provide it.
>
> 2.  If the instance is not healthy, it has to be terminated and a new
> instance started. How do I tell scalr the instance is not healthy?  Do I
> use the scalr command line tools and terminate the instance via the API? Or
> is there a better way to do that?
>
> Any Help is appreciated.
>
> Regards
> Srini
>
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