Apache Proxy Balancer

Enable proxy models

sudo a2enmod proxy_html
sudo a2enmod proxy_http
sudo a2enmod proxy_wstunnel
sudo a2enmod proxy_ajp
sudo a2enmod lbmethod_byrequests
sudo a2enmod lbmethod_bytraffic
sudo a2enmod lbmethod_bybusyness
sudo a2enmod lbmethod_heartbeat

Modify configuration file

<IfModule mod_ssl.c>
<VirtualHost *:443>
  ServerName happynavy.tk
  ServerAlias www.happynavy.tk
  ServerAdmin [email protected]

  ProxyPreserveHost On

  Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED
  <Proxy "balancer://mycluster">
    BalancerMember "http://swarm-manager01:3080" route=1
    BalancerMember "http://swarm-manager02:3080" route=2
    BalancerMember "http://swarm-manager03:3080" route=3
    ProxySet stickysession=ROUTEID
  </Proxy>
  ProxyPass "/" "balancer://mycluster/"
  ProxyPassReverse "/" "balancer://mycluster/"

  SSLCertificateFile /etc/letsencrypt/live/happynavy.tk/fullchain.pem
  SSLCertificateKeyFile /etc/letsencrypt/live/happynavy.tk/privkey.pem
  Include /etc/letsencrypt/options-ssl-apache.conf
</VirtualHost>

</IfModule>

source: https://httpd.apache.org/docs/2.4/mod/mod_proxy_balancer.html

Written on March 26, 2018