Apache httpd : Configure mod_proxy2023/03/03 |
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>
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> systemctl reload httpd |
[5] | Access to frontend server to verify backend servers response like follows. |
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