[jira] [Created] (STRATOS-659) Improve Domain Mappings Functionality to Re-Write URLs in Load Balancer

["Imesh Gunaratne (JIRA)" <ji...@apache.org>]

Imesh Gunaratne created STRATOS-659:
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             Summary: Improve Domain Mappings Functionality to Re-Write URLs in Load Balancer
                 Key: STRATOS-659
                 URL: https://issues.apache.org/jira/browse/STRATOS-659
             Project: Stratos
          Issue Type: Improvement
          Components: Load Balancer
            Reporter: Imesh Gunaratne
            Assignee: Imesh Gunaratne


In current Domain Mappings implementation Stratos allows to add domain mappings to service subscriptions with following parameters: cartridgeType, subscriptionAlias, list of <domainName, appContext>. 

Stratos Manager sends this information to load balancers via the message broker. Load balancer keeps domainName in a hash map against its cluster, once a request is received the cluster is fetched and request is delegated to the next available member in that cluster without touching the request path. In the member a Tomcat virtual host could be created with the appContext to map the incoming request path to actual application path.

However this design is not scalable with different types of services which might not be able to use Tomcat virtual hosts.

Therefore we could implement a new functionality to map URLs in Stratos load balancer and directly delegate the incoming requests to mapped URLs with the provided information in domain mappings.

Sample:
Domain mapping: domain-name = foo.org, app-path = app/path/provided
Incoming request: https://foo.org/some/file/path?someQueryParam=value
LB re-writes it to: https://member-ip:port/app/path/provided/some/file/path/?someQueryParam=value



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