
Today each IaaS cloud presents a unique API to which developers and ISVs need to write in
order to consume the cloud service. The Deltacloud effort is creating a common, REST-based
API, such that developers can write once and manage anywhere. Deltacloud is a cloud
broker, so to speak, with drivers that map the API to both public clouds like EC2 and private
virtualized clouds based on VMware vCloud, or RHEV-M as depicted in Figure 7.
One level up, Deltacloud Aggregator provides a web UI in front of the Deltacloud API. With
Deltacloud Aggregator users can:
• View image status and statistics across clouds, all in one place
• Migrate instances from one cloud to another
• Manage images locally and provision them on any cloud
To learn more about the Deltacloud project, visit http://deltacloud.org.
17 www.redhat.com
Figure 7: Deltacloud Overview
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