Web Server-16.Configure mod_proxy

 

Apache httpd : Configure mod_proxy2022/03/16

Enable [mod_proxy] module to configure reverse proxy settings. This example is based on the environment like follows. -----------+---------------------------+----------- | | |10.0.0.31 |10.0.0.51 +----------+-----------+ +-----------+----------+ | [ www.srv.world ] | | [ node01.srv.world ] | | Web Server#1 | | Web Server#2 | +----------------------+ +----------------------+

[1]	[mod_proxy] is included in [httpd] package and it is enabled by default, so it's possible to configure quickly.

# modules are enabled by default [root@www ~]#  grep "mod_proxy" /etc/httpd/conf.modules.d/00-proxy.conf LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_ajp_module modules/mod_proxy_ajp.so LoadModule proxy_balancer_module modules/mod_proxy_balancer.so ..... ..... [root@www ~]#  vi /etc/httpd/conf.d/revers_proxy.conf # create new <IfModule mod_proxy.c> ProxyRequests Off <Proxy *> Require all granted </Proxy> # backend server and forwarded path ProxyPass / http://node01.srv.world/ ProxyPassReverse / http://node01.srv.world/ </IfModule> [root@www ~]#  systemctl reload httpd

[2]	If SELinux is enabled, change policy.

[root@www ~]#  setsebool -P httpd_can_network_connect on

[3]	Access to frontend server to verify backend server responses like follows.

[4]

It's possible to configure load balancing settings. -----------+---------------------------+--------------------------+------------ | | | |10.0.0.31 |10.0.0.51 |10.0.0.52 +----------+-----------+ +-----------+----------+ +-----------+----------+ | [ www.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] | | Web Server#1 | | Web Server#2 | | Web Server#3 | +----------------------+ +----------------------+ +----------------------+

[root@www ~]#  vi /etc/httpd/conf.d/revers_proxy.conf # create new <IfModule mod_proxy.c> ProxyRequests Off <Proxy *> Require all granted </Proxy> # specify the way of load balancing with [lbmethod] # also possible to set [bytraffic] which means httpd balances requests by traffic ProxyPass / balancer://cluster lbmethod=byrequests <proxy balancer://cluster> BalancerMember http://node01.srv.world/ loadfactor=1 BalancerMember http://node02.srv.world/ loadfactor=1 </proxy> </IfModule> [root@www ~]#  systemctl reload httpd

[5]	Access to frontend server to verify backend servers response like follows.