CA AppLogic makes it easy to combine appliances into structures that perform advanced application functions. Assuming that all required appliance classes already exist, building a structure involves three general steps:
The figure above shows shared file storage implemented as a structure of appliances. The structure consists of two application servers, app1 and app2 which are instances of the same class APP, and a network attached storage (NAS) appliance nas1 of class NAS. The outputs of both application servers are connected to the cifs input of the nas1 box. The NAS appliance is configured with a suitably large volume, sufficient to meet the storage needs of app1 and app2. Each appliance is configured with additional properties and attributes as needed.
CA AppLogic makes it easy to describe arbitrarily complex structures of virtual appliances in a uniform way by capturing the set of instances that participate in them, the configuration parameters for each instance and the connections between their terminals.
This allows CA AppLogic to instantiate such structures automatically, by interpreting structure descriptions, instantiating appliances, configuring them with the provided values and establishing virtual wires, through which the appliances will interact.
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