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Use the steps in the following steps topics to configure Apache Httpd as the load balancer for WSO2 products.

Configuring Apache Httpd

1. Install Apache Httpd using the following command.
   $sudo apt-get install apache2
2. Enable the following required modules.
   $sudo a2enmod proxy_http
$sudo a2enmod ssl
$sudo a2enmod proxy_balancer

3. Configure to direct the HTTP requests to the worker nodes with load balancing as http://as.wso2.com/<service> via HTTP 80 port.
   $sudo vi /etc/apache2/site-available/wso2.as.com.conf

   Code Block
   language xml
   <VirtualHost as.wso2.com:80> ServerName as.wso2.com # disable forward proxy requests ProxyRequests off <Proxy balancer://wso2.as.com> # Add a member to the load balancing group BalancerMember http://xxx.xxx.xxx.xx3:9763 BalancerMember http://xxx.xxx.xxx.xx4:9763 ProxySet lbmethod=byrequests </Proxy> ProxyPass / balancer://wso2.as.com/ ProxyPassReverse / balancer://wso2.as.com/ </VirtualHost>

4. Configure to direct the HTTPS requests to the worker nodes with load balancing as https://as.wso2.com/<service> via HTTPS 443 port.
   $sudo vi /etc/apache2/site-available/wso2.as.com.conf

   Code Block
   language xml
   <VirtualHost as.wso2.com:443> ServerName as.wso2.com ProxyRequests off # creating debug logs LogLevel debug <Proxy balancer://ssl.wso2.as.com> BalancerMember https://xxx.xxx.xxx.xx3:9443 BalancerMember https://xxx.xxx.xxx.xx4:9443 ProxySet lbmethod=byrequests </Proxy> ProxyPass / balancer://ssl.wso2.as.com/ ProxyPassReverse / balancer://ssl.wso2.as.com/ # enable SSL/TLS for a that virtual host SSLEngine On SSLCertificateFile /etc/apache2/ssl/wrk.crt SSLCertificateKeyFile /etc/apache2/ssl/wrk.key # enable SSL/TLS for proxy usage in a particular virtual host SSLProxyEngine On </VirtualHost>

5. Configure Apache Httpd to access the management console as https://mgt.as.wso2.com/carbon via HTTPS 443 port.

   Code Block
   <VirtualHost mgt.as.wso2.com:443> ServerName mgt.as.wso2.com ProxyRequests off LogLevel debug ProxyPass /carbon https://xxx.xxx.xxx.xx2:9443/carbon/ ProxyPassReverse /carbon https://xxx.xxx.xxx.xx2:9443/carbon/ SSLEngine On SSLCertificateFile /etc/apache2/ssl/mgt.crt SSLCertificateKeyFile /etc/apache2/ssl/mgt.key SSLProxyEngine On </VirtualHost>

   Enable virtual host configurations.
   $sudo a2ensite wso2.as.com.conf
6. Restart Apache Httpd.
   $sudo /etc/init.d/apache2 restart

Creating self-signed certificate for Apache httpd

...

While creating keys, enter the host name (as.wso2.com or mgt.as.wso2.com) as the Common Name.

Restarting Apache Httpd

1. Enable virtual host configurations.
   $sudo a2ensite wso2.as.com.conf
2. Restart Apache Httpd.
   $sudo /etc/init.d/apache2 restart