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HAProxy URL Rewriting

/ Published in: Apache
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In this example:

*rewrite urls from domain.com to www.domain.com*

This is somewhat documented elsewhere, but not very well, so here's an example on how to perform simple URL rewriting with HAProxy (instead of using mod_rewrite with apache).

This works great if your servers use lighttpd, nginx, or anything that doesnt provide its own simple url rewriting.

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  1. frontend webserver
  2.         bind    :80
  3.         mode    http
  4.         acl is_www hdr_beg(host) -i     www.domain.com
  5.         use_backend http_cluster if is_www
  6.         default_backend http_redir
  7.  
  8. backend http_redir
  9.         mode    http 
  10.         balance source
  11.         option  nolinger
  12.         server  web 127.0.0.1:8080 redir http://www.domain.com
  13.  
  14. backend http_cluster
  15.         mode    http
  16.         option  forwardfor
  17.         balance source
  18.         option  httpclose
  19.         option  httpchk HEAD / HTTP/1.0
  20.         server  web01 172.16.0.11:80 weight 1 check inter 1000 rise 5 fall 1
  21.         server  web02 172.16.0.12:80 weight 1 check inter 1000 rise 5 fall 1
  22.         server  web03 172.16.0.13:80 weight 1 check inter 1000 rise 5 fall 1
  23.         server  web04 172.16.0.14:80 weight 1 check inter 1000 rise 5 fall 1

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