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From Jeff Trawick <traw...@gmail.com>
Subject [users@httpd] Re: Backend host/port in the log
Date Wed, 17 Jun 2009 13:21:24 GMT


arungupta wrote:
> 
> Configured mod_proxy_balancer for front-ending a bunch of GlassFish
> instances. How do I print the backend host/port in the log ?
> 

In general, Apache environment variables (distinct from OS environment
variables) are logged via %{envvar-name}e.  The special environment
variables created by the balancer are documented at
http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html#environment. 
BALANCER_WORKER_NAME seems to be the one you want:

BALANCER_WORKER_NAME

    This is assigned the name of the worker used for the current request.
The value is something like http://hostA:1234.

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