Ubuntu Cloud Server
Welcome to the Oneiric Ocelot edition of Ubuntu Enterprise Cloud, which is now known as Ubuntu Cloud Server and powered by the OpenStack software instead of Eucalyptus in order to deliver a massively scalable cloud operating system.
Supported platforms and availability
Ubuntu Cloud Server 11.10 was a officially announced by Canonical on October 13, 2011 as a major redesign to the Ubuntu Enterprise Cloud product, as it now uses the OpenStack open source software cloud computing platform.
It was supported until May 9, 2013 and can be downloaded as QCOW2 disk image files for use with the QEMU and KVM virtualization technologies. Supported platforms include 64-bit (amd64), 32-bit (i386) and ARMEL. As usual, Canonical provides Amazon Machine Images (AMI) for who want to quickly launch Ubuntu Cloud Server on Amazon EC2, without downloading anything.
Getting started with Ubuntu Cloud Server
As mentioned, Ubuntu Cloud Server was previously known as Ubuntu Enterprise Server and it was distributed as part of the Ubuntu Server operating system, accessible from the boot menu of its ISO images. Starting with Ubuntu 11.10, the "Install Ubuntu Enterprise Cloud" option has been replaced with "Enlist system with Ubuntu Orchestra Server" and Ubuntu Cloud Server distributed separately.
You can use the provided cloud images to install Ubuntu Cloud Server on an existing cloud system powered by Ubuntu, as well as on top of an Amazon EC2 instance. Detailed installation instructions are provided by Canonical at https://help.ubuntu.com/community/UEC?action=show&redirect=Eucalyptus.
All in all, we are happily satisfied to see that Canonical's Ubuntu Enterprise Cloud project took an interesting turn and it is now considered a mature project, designed to help users deploy Ubuntu in the cloud with minimum effort. Keep in mind though, that this version is no longer supported and has been archived for historical purposes only.