OpenNebula 2.0 includes a significant amount of changes and new features in many areas. The following is probably incomplete list of the new functionality:

• Image Repository. The Image Repository allows users to easily specify disk images from a catalog without worrying about low-level disk configuration attributes or block device mapping. Also, image access control is applied to the images registered in the repository, hence simplifying multi-user environments and image sharing. The traditional method of specifying VM disks is also fully supported. More info...

• MySQL support. OpenNebula can work now with MySQL or Sqlite DBs backends. The new MySQL support brings important performance and scalability improvements compared to the Sqlite implementation. MySQL is the recommended option for large-scale clouds. More info...

• Improved VMWare support. VMware drivers has been re-written to make use of all the features offered by the OpenNebula daemon so leveling its functionality with KVM and Xen. The new drivers uses the libvirt driver. More info...

• Scalability Improvements. Several components of OpenNebula have been tuned to work with tens of thousands of VMs, including the redesign of the scheduler and adjustments to the monitoring modules.

• Separate VM and Information actions. The specific operations performed when monitoring a host or performing an specific operation on a VM has been decoupled from the driver code base. Now it is even easier to tune your cloud. Also the number of connections to the node have been reduced.

• Cluster support. Physical hosts can now be grouped in logical clusters, so after a cluster is defined it can be then used to set the placement of a VM. More info...

• Accounting. New tools are provided to generate accounting reports for cloud users or physical hosts. More info...

• Authorization & Authentication Drivers. The authorization and authentication processes in OpenNebula have been totally redesigned. Now they can be handled natively by the OpenNebula core, offering the same functionality as OpenNebula 1.4. Alternatively, the A&A processes can be handled by an external component that can be integrated with any A&A system or user maps (e.g. LDAP, Kerberos…). As an example OpenNebula 2.0 features a quota based authorization module and user authentication based on RSA keys. More info...

• Quota Management. Allowing cloud administrators to set limits on cloud resources for users

• LDAP Integration. Levering the new authorization & authentication framework, datacenters using LDAP for user management integrate it with OpenNebula, without the need of re-creating the user data. More info...

• Virtual Networking Improvements. OpenNebula 2.0 lets you define generic attributes associated to a a Virtual Network (e.g. gateway, dns servers…) that can then be included in the context of a VM. This will let you easily configure VMs with multiple NICs. Additionally Virtual Networks can now be defined as public, and thus shared among multiple users.

• Improved EC2 support. The EC2 Query server can now be used with the EC2 ecosystem, supported third party applications include ElasticFox or EucaTools. More info...

• Java Bindings for the OpenNebula Cloud API (OCA) OpenNebula 2.0 includes JAVA bindings that wraps the XML-RPC interface methods exposed by the core. More info...

• Improved OCCI support. The OCCI implementation now follows a more coherent schema. The OCCI server also makes a more robust handling of incoming requests. More info...

Here you can find the complete list of changes

Since OpenNebula 2.0 Beta a new DB schema has been introduced. The new schema is not compatible with the schema present in OpenNebula 1.4. Host, Networks or Virtual Machines defined in OpenNebula 1.4 installs will not longer work with this release.

OpenNebula 2.0 includes new API calls and methods. However there have been no changes in those API calls already supported in OpenNebula 1.4. Applications using OCA (Ruby and Java bindings) are expected to work with OpenNebula 2.0.

The complete source tree for OpenNebula can be freely downloaded here. The compilation has been tested on the main linux distributions, please check the platform notes for more information.

Also binary packages for Ubuntu 10.04, CentOS 5.5, Debian 5.0.6 and RHEL 5.5 are available for download.

We will appreciate it if you let us know your feedback after trying the new version!, and report your bugs either at the development portal or at the mailing list.

Please refer to the OpenNebula 2.0 documentation guides to install and configure your system. More information about OpenNebula can be found at:

• About the Project
• About the Technology
• Key Features
• OpenNebula Add-ons
• Ecosystem

For a detailed changelog of bugs addressed by OpenNebula 2.0 check the development portal.