I'm at the final stage of deploying our Galaxy instance. I'm implementing the proxy server and load balancing with 1 job runner, and 5 web runners using Apache. I'm following the guide on:
http://wiki.g2.bx.psu.edu/Admin/Config/Performance/Web%20Application%20Scali...
All the Galaxy universe_wsgi.[webapp|runner].ini changes are fine. When editing the Apache configuration, I discovered a slight problem.
First off, instead of modifying /etc/httpd/conf/httpd.conf, I created /etc/httpd/conf.d/galaxy.conf. The /etc/httpd/conf/httpd.conf reads /etc/httpd/conf/*.conf for additional settings. I thought it best to put changes here instead of polluting httpd.conf.
One of the last changes in the docs is to Apache's rewriting rules is to change
RewriteRule ^/galaxy(.*) http://localhost:8080$1 [P]
to
RewriteRule ^(.*) balancer://galaxy$1 [P]
The problem with this however is that "http://<machine>/galaxy" not longer works. Only "http://<machine>/galaxy/" (note the trailing backslash). Without the trailing backslash, HTTP requests never get past Apache's rewrite rules. I *think* the correct change should be:
RewriteRule ^/galaxy(.*) balancer://galaxy$1 [P]
This seems to work for me (so far) and allows initial requests with and without the trailing backslash. Can I recommend this as a change to the docs? Also, can I recommend documenting a separate galaxy.conf for Apache? I'd be happy to provide mine as a model, if you'd like.
Ryan