List,
*This is a cross post from Apache-HTTPD-Users but has just enough RedHat server
relavance that a reader here might be able to comment and offer suggestions.*
Thanks in advance for any comments and suggestions offered.
Here's my scenario:
I have two (2) machines listening on IPs in the following manner:
www0 - x.x.x.2
x.x.x.4
www1 - x.x.x.1
x.x.x.3
DNS is configured for round-robin load sharing as follows:
www.primaryName.com. IN A x.x.x.1
www.primaryName.com. IN A x.x.x.2
www.primaryName.com. IN A x.x.x.3
www.primaryName.com. IN A x.x.x.4
www.secondaryName.com. IN A x.x.x.1
www.secondaryName.com. IN A x.x.x.2
www.secondaryName.com. IN A x.x.x.3
www.secondaryName.com. IN A x.x.x.4
...repeat 3x more for other domains ...
Each machine is running Apache 2.0.43:
ServerName www.primaryName.com:80
A single vhost is configured as follows:
#NameVirtualHost *
<VirtualHost x.x.x.N>
# N is equal to the second IP address of the machine.
# so for www0, N = 4.
#inherit from global config
ErrorLog logs/error_xN.log
</VirtualHost>
To complete this setup, I want all of the answering domain names to display in the
client as "http://www.primaryName.com";
I'm intending to accomplish this in the global configuration with:
RewriteEngine on
RewriteRule ^(.+)$ http://www.primaryName.com/$1 [R=permanent]
As I understand it this should work, but I have not tested it in production. This
RewriteRule should inherit to the vhost as well, correct? And would it be better to
use a negated rule...
RewriteRule ^!(http://www.primaryName.com) http://www.primaryName.com/$1 [R=permanent]
N.B. In rewriting this post I'm seeing something I did not before. The machine will
answer on the IPs it's configured to listen to regardless of the vhost I have defined.
I believe my original intention of the vhost was to separate the log files out for
reporting purposes, but have since merged all of the access_logs. I think merging the
error_logs might be in order as well.
It seems that I want to define a vhost that looks something like:
#Uncomment NVH and listen on all IPs
NameVirtualHost *
#This vhost listens by default
<VirtualHost *>
#inherit from global config
ServerAlias www.secondaryName0.com www.secondaryName1.com
RewriteEngine on
RewriteRule RewriteRule ^(.+)$ http://www.primaryName.com/$1 [R=permanent]
RewriteLog /path/to/log/file
#temporarily set verbose logging
RewriteLogLevel 3
</VirtualHost>
Finally, I'm on the fence with using mod_rewrite because of perceived, and documented,
overhead. I think it best fits my scenario. However, I'm thinking that mod-alias might
also work. I'm seeking feedback so... can mod_alias do this without the overhead?
Looking forward to hearing from the experiences of others. Thanks in advance for all
suggestions and comments.
Warmest Regards,
Tim
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