Setting up a session sticky Glassfish cluster

See the Glassfish cluster blog entry for setting up a Glassfish cluster.

Requirements

• Apache 2.2.x
• mod_proxy
• mod_proxy_balancer
• mod_rewrite
• Glassfish 2 ur2 +

Setup

Add the following to make Apache load balance to your Glassfish instances:

    
    RewriteEngine On
    ProxyRequests Off

    <Proxy *>
        Order deny,allow
        Allow from all
    </Proxy>

    <Location /balancer-manager>
        SetHandler balancer-manager
    </Location>

    <Proxy balancer://mycluster>
       BalancerMember http://10.1.1.2:8080 route=w1
       BalancerMember http://10.1.1.3:8080 route=w2
       BalancerMember http://10.1.1.4:8080 route=w3
    </Proxy>

    <Location /clusterjsp>
        Order allow,deny
        Allow from all
    </Location>

    ProxyPass /clusterjsp balancer://mycluster/clusterjsp stickysession=JSESSIONID
        

The next step is to prepare the cluster so it keeps the route. Create a cluster wide JVM option:

    Name  : jvmRoute
    Value : ${INSTANCE_ROUTE}
        

Then for each instance in the cluster, set the appropriate system instance property, eg:

    Name  : INSTANCE_ROUTE
    Value : w1
        

(Glassfish 2)

Posted September 14, 2012

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