Configuring Apache Httpd

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

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

   <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>

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

   <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>

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

   <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>

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

Creating self-signed certificate for Apache httpd

1. Generate private key.
   $sudo openssl genrsa -out ca.key 1024
2. Generate a Certificate Signing Request (CSR).
   $sudo openssl req -new -key ca.key -out ca.csr
3. Generate a self-signed key
   $sudo openssl x509 -req -days 365 -in ca.csr -signkey ca.key -out ca.crt

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

Creating self-signed keystores

1. Create a new keystore with a private and public key pair.
   $keytool -genkey -keyalg RSA -alias wso2carbon -keystore wso2carbon.jks -storepass wso2carbon -validity 360 -keysize 2048
2. Export the public certificate.
   $keytool -export -alias wso2carbon -keystore wso2carbon.jks -storepass wso2carbon -file wso2carbon.pem
3. Import public certificate into client-truststore.jks.
   $keytool -import -alias wso2carbon -file wso2carbon.pem -keystore client-truststore.jks -storepass wso2carbon

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