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

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

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://as.wso2.com:9765
		BalancerMember http://as.wso2.com:9766
		ProxySet lbmethod=byrequests
	</Proxy>


	ProxyPass / balancer://wso2.as.com/
	ProxyPassReverse / balancer://wso2.as.com/
</VirtualHost>

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://as.wso2.com:9445
		BalancerMember https://as.wso2.com:9446
		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>

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://mgt.as.wso2.com:9444/carbon/
ProxyPassReverse /carbon https://mgt.as.wso2.com:9444/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
Restart Apache Httpd.
$sudo /etc/init.d/apache2 restart

...

While creating keys, enter the host name (as.wso2.com or mgt.as.wso2.com) as the Common Name.What is your first and last name?
[Unknown]: mgt.as.wso2.com
…….
Is CN=mgt.as.wso2.com, OU=Eng, O=Wso2, L=Colombo, ST=Colombo, C=SL correct?
[no]: yes

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