Architecting a vCloud Availability for vCloud Director Solution : vCloud Director Configuration
   
vCloud Director Configuration
vCloud Availability for vCloud Director is extending vCloud Director functionality, which is used as a platform for its services.
The following points summarize vCloud Availability for vCloud Director interaction with vCloud Director:
vCloud Availability for vCloud Director registers itself as a vCloud API extension, which is provided by vSphere Replication Cloud Service appliances.
RabbitMQ messaging bus and vCloud API are used for communication with vCloud Director.
vSphere Replication Cloud Service uses the VMware vCenter Single-Sign On solution user to access the vCloud API as system administrator.
Cloud Proxy is provided as part of vCloud Director cell binaries and its address is configured with vCloud API (see 4.3.1, From-the-Cloud Tunnel)
vCloud Availability Portal relies on tenant vCloud API to collect and configure replications