OpenNebula 4.4 Retina
Dec 3rd, 2013. The OpenNebula team is pleased to approach winter with the immediate availability of the final version of OpenNebula 4.4, codename Retina. As a project driven by user needs, this release includes important features that meet real demands from production environments, with a focus on optimization of storage, monitoring, cloud bursting, and public cloud interfaces.
OpenNebula Retina includes support for multiple system datastores, which enables a much more efficient usage of the storage resources for running Virtual Machines. This feature ships with different scheduling policies for storage load balancing, intended to instruct OpenNebula to spread the running Virtual Machines across different storage mediums to optimize their use. This translates in the ability to define more than one disk (or other backend) to hold running VMs in a particular cluster. Monitoring subsystem in OpenNebula underwent a major redesign as well, effectively switching from a pulling mechanism to a pushing model, with the implications in scalability improvements.
An important effort has been made in the hybrid cloud model (cloud bursting). Using the AWS API tools have been deprecated in favor of the new Ruby SDK released, which allows the support of new AWS mechanisms like for instance IAM. Also, now is possible to fully support hybrid VM templates. Moreover, the AWS public cloud interface implemented by OpenNebula has been revisited and extended to support new functionality, as well as improved so the instance types are offered to the end user from OpenNebula templates.
This is a stable release and so a recommended update that incorporates several bug fixes since 4.4 RC. We've done our best to keep compatibility with OpenNebula 4.2, so any application developed for previous versions should work without effort. In any case, be sure to check the compatibility and upgrade guides.
As usual OpenNebula releases are named after a Nebula. The Retina Nebula (IC 4406) is a planetary nebula near the western border of the constellation Lupus, the Wolf. It has dust clouds and has the shape of a torus.
In the following list you can check the highlights of OpenNebula 4.4 Retina organised by component (a detailed list of changes can be found here):
OpenNebula 4.4 brings multiple new features to manage virtual machines:
unknownstate. An updated diagram can be found here
There has been also several improvements for administrators and new features to enhance the robustness and scalability of OpenNebula core:
The back-end of OpenNebula has been also improved in several areas, as described below:
Multiple improvements in the EC2 Public API exposed by OpenNebula:
The cloud bursting (previously called hybrid) drivers have been improved in a variety of areas:
onehost sync” to update the monitoring probes.
OpenNebula is released under the Apache 2.0 open source license. The complete source tree and binary packages for OpenNebula can be downloaded here.
Packages are available for various distros: Ubuntu LTS and latest, CentOS, OpenSUSE and Debian.
The documentation of OpenNebula 4.4 can be found here.
Because OpenNebula is inherently portable to different operating systems and virtualization platforms, most Linux distributions and Hypervisors are supported. However, not all platform configurations and combinations exhibit a similar functionality, performance and stability. You can contact us if you need advise about the best platform configurations and environments for functionality and performance. Please read our Certification Policy for more information.
This is the list of the individual platform components that have been through the complete OpenNebula Quality Assurance and Certification Process.
|Certified Platform Component||Version|
|RedHat Enterprise Linux||6.4|
|Ubuntu Server||12.04 (LTS) & 13.04 (Latest)|
|SUSE Linux Enterprise||12.3|
|VMware||ESX 5.0 & ESX 5.1|
|Xen||3.2 & 4.2|
|KVM||Supported version that is included in the kernel for the Linux distribution|
|Xen Server, Xen Cloud Platform, and Hyper-V||Please contact us if you are interested in these hypervisors|
The OpenNebula project would like to thank the community members and users who have contributed to this software release by being active with the discussions, answering user questions, or providing patches for bugfixes, features and documentation.