1.Eucalyptus:
Eucalyptus is a Linux-based software architecture that implements
scalable private and hybrid clouds within your existing
IT
infrastructure. Eucalyptus allows you to use your own collections of
resources (hardware, storage, and network) using
a self-service
interface on an as-needed basis
You deploy a Eucalyptus cloud across your enterprise’s on-premise data
center. Users access Eucalyptus over your
enterprise‘s intranet. This
allows sensitive data to remain secure from external intrusion behind the
enterprise firewall.
You can install Eucalyptus on the following Linux
distributions:
? CentOS 6
? Red Hat Enterprise Linux 6
原文：http://www.cnblogs.com/ruiy/p/hybirdClouds.html