HAProxy : HTTP Load Balancing2024/05/28 |
Install HAProxy to configure Load Balancing Server.
This example is based on the environment like follows. -----------+---------------------------+--------------------------+------------ | | | |10.0.0.30 |10.0.0.51 |10.0.0.52 +----------+-----------+ +-----------+----------+ +-----------+----------+ | [ dlp.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] | | HAProxy | | Web Server#1 | | Web Server#2 | +----------------------+ +----------------------+ +----------------------+ |
Configure Servers that HTTP connection to HAProxy Server is forwarded to backend Web Servers.
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[1] | Install HAProxy. |
root@dlp:~# apt -y install haproxy
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[2] | Configure HAProxy. |
root@dlp:~#
vi /etc/haproxy/haproxy.cfg # add to last line # define frontend ( any name is OK for [http-in] ) frontend http-in # listen on 80 port bind *:80 # set default backend default_backend backend_servers # send X-Forwarded-For header option forwardfor # define backend backend backend_servers # balance with roundrobin balance roundrobin # define backend servers server node01 10.0.0.51:80 check server node02 10.0.0.52:80 check systemctl reload haproxy |
[3] | Change settings on backend Web servers to logging X-Forwarded-For header. Follows are for the case of Apache2 settings, if you use Nginx, refer to here of [3]. |
root@node01:~# a2enmod remoteip Enabling module remoteip. To activate the new configuration, you need to run: service apache2 restart
root@node01:~#
vi /etc/apache2/apache2.conf # line 212-215 : change like follows # for RemoteIPInternalProxym, specify HAProxy IP address RemoteIPHeader X-Forwarded-For RemoteIPInternalProxy 10.0.0.30 LogFormat "%v:%p %a %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined LogFormat "%a %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%a %l %u %t \"%r\" %>s %O" commonroot@node01:~# systemctl reload apache2 |
[4] | Verify working normally to access to the frontend HAproxy Server. |
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