We have created a new user survey that will take you only 5 minutes to complete. As an open-source community, it is very important for us to have information about your deployment. Doing so you will have influence over the project and software direction, and will help us improve the support for most demanded infrastructure platforms and configurations.

All of the information you provide is confidential. We will not share organization-specific or personal information. We will only report aggregate, non-personally identifiable data.

The results from our last survey  (2012) are available here. Do not hesitate to contact us if you have questions.


Thanks for completing the survey!

Damir Mujic, founder of AVALON web hosting

Damir Mujic, founder and CEO at AVALON web hosting

As a company that has been in the hosting business for the past 17 years, Avalon has always had only one goal – to provide the best possible service to our customers. We are a premium web hosting provider and we are one of the largest providers in Croatia and the region, hosting more than 16,000 domains across Europe.

Two years ago, we decided to build our web hosting platform entirely from scratch, using the best cloud technology that we could find. While searching for partners, it was extremely important for us to find the best among them and apply the best of their technologies enabling us to provide a premium level service to our customers..

We selected the IBM as a hardware vendor and became the IBM Managed Solutions Provider, building a complete infrastructure on the IBM System x technology. As almost 80% of our customers are using Linux hosting our perfect match was combination of CentOS Linux and KVM hypervisor.

When considering cloud management solutions, we tried many well-known open source and some commercial cloud solutions, and after thorough testing we decided to choose OpenNebula as our foundation platform for future development of our cloud hosting services.

We developed our OpenNebula cloud integration with Ceph, a distributed object store and file system which we found really impressive.  – Today, that is the platform for our shared hosting and virtual server users, and we have over 6 month experience in production.

We believe that OpenNebula with EC2 API support together with Ceph Storage, which is compatible with the S3 object storage, is a very good basis for the further development of our web hosting services, as well as many other services in the future based cloud technology.

Next week in Zagreb, Croatia, on July 3rd at 10 AM, we are organising a press conference where the official launch of our hybrid cloud platform will be announced. I am very grateful to OpenNebula founders Mr. Ignacio M. Llorente and Mr. Rubén S. Montero, who are supporting us in this project, and we are extremely pleased that Mr. Constantion Vasquez, as a Senior Infrastructure Architect at C12G Labs, will attend as a speaker at the conference, introducing OpenNebula project to the Croatian media.

In addition to Mr. Vázquez and myself, other conference speakers will include Mr. Damir Zec, managing director of IBM Croatia, Mr. Dobrisa Adamec, Microsoft MVP and Mr. Tomislav Bronzin, Microsoft MVP who will cover the second smaller part of our platform targeted at  ASP.NET developers.


We feel it’s time to remind our vision of a world that won’t be dominated by a single cloud management platform. We’re moving into a world of open cloud — where each organization can find the right cloud for its unique needs. A single cloud management platform can not be all things to all people, there will be a cloud space with several offerings focused on different environments and/or industries. This is the natural evolution, same happened in other markets like relational databases or the web servers.

Our commitment to the open cloud flows directly out of our mission — to become the simplest cloud enabling platform — and our purpose — to bring simplicity to the private and hybrid enterprise cloud. OpenNebula exists to help companies build simple, cost-effective, reliable, open enterprise clouds on existing IT infrastructure, where:

Simplicity means …

… you do not need an army of administrators to build and maintain your cloud.

Openness means …

… you will run production-ready software that is fully open-source without proprietary extensions that lock you in.

Reliability means …

… your cloud will run for years with little maintain.

Flexibility means …

… you can easily build a cloud to fit into your data center and policies.


Many companies contact us because they are looking for alternatives to VMware vCloud. They usually report that:

  • vCloud is not an easy to use solution
  • vCloud is mostly suited for vSphere and public clouds running VMware
  • vCloud can no be adapted to their needs
  • Last, but not least, VMware announced in september 2013 that vCloud Director was approaching end of life for enterprises with its functionality being split into vCenter and vCloud Automation Center

Because it is completely hypervisor agnostic, fully supports VMware, and is easy to install, maintain and use within existing VMware environments, OpenNebula is widely used as an open alternative to VMware vCloud at significantly lower costs. Some of our users also see OpenNebula as a migration tool that allows them to perform a smooth transition from VMware to more open hypervisor alternatives like KVM. In other words OpenNebula leverages existing VMware infrastructure, protecting IT investments, and at the same time avoids future vendor lock-in, strengthening the negotiating position of the enterprise.

Companies usually evaluate other alternatives, like some of the OpenStack-based products, Red Hat’s mainly. In these cases, we suggest the company to:

  • Compare features and see which product is closer to vCloud in terms of enterprise cloud features
  • Ask the other providers if they offer enterprise support for both VMware and KVM (or any other open-source hypervisor)
  • Check if the other products are really open-source or a proprietary extension of a open-source software

Finally, companies need to develop a hybrid cloud strategy. We understand private cloud as a complement to public cloud, and this is why we provide unique features to build hybrid cloud deployments. OpenNebula offers a single management interface for internal and remote cloud resources.

So before starting the migration from vCloud to vCAC, why do not you give a try to OpenNebula to manage your cloud platform?. Our community is willing to help you.

As you may be aware, the OpenNebula Project is organising two Cloud Technology Days in US this month. The first one will take place in Boca Raton, Florida, the 19th of June, hosted by TransUnion, whereas the west coast will be covered by the Bay Area Techday the 24th of June, hosted by Hyve, which includes an exciting tour around the manufacturing plant of Facebook production racks.

OpenNebula Project members will be also around the two following events:

If you happen to be around and want to get to know the project and discuss OpenNebula or Cloud Computing in general, drop us a line and will schedule a meeting.


We have just released a new maintenance release 4.6.2. This time it
does not come with new features, just bug fixes.

One of them is a security vulnerability in Sunstone and you should
upgrade your installation. Thanks to Dennis Felsch and Mario
Hei­de­rich from Horst Görtz Institute for IT-Security,
Ruhr-University Bochum for telling us about it.

Other fixes are as follows:

In case you have 4.6.1 installed the upgrade is straightforward as the
config files have not changed.

As always, make sure you read the upgrade guide before applying the new release.


If you all were wondering how you could support such a lovely conference like this one, we will now give you all the information you were desperately craving for. You can:

1. Spread the word
… on your blog or website or whenever you meet people who shouldn’t miss the Conf
You can use all press material from here if you want to.

2. Be a Speaker
… make sure to register here until August 15th and support us with a great talk!

3. Get your Ticket
… or get your ticket here and support us with your presence at the Conf

And of course you can help us by being a sponsor! Everything you need to know about your sponsorship opportunities is here. We are also happy to hear from you whenever you have questions.

We want to let you know about what we are up to with the main news from the last month regarding the OpenNebula project, including what you can expect in the following months.

But, before we start, credit where it’s due. Check out this post highlighting two papers presenting the original internal design and architecture of the Eucalyptus and OpenNebula cloud management platforms. Really proud to be there for our users from the very beginning of Cloud Computing!


The OpenNebula team is preparing the next upcoming release (yes, we are relentless!), currently discussing the roadmap taking into account the user’s feedback. This release will polish past features as well as address those left aside in OpenNebula 4.6 Carina. One of the main features would be a new graphic interface for the Virtual Datacenter administrators (sneak peek below).




Also, hybrid cloud support will be addressed, with two new plugins on the works. A partnership with IBM/SoftLayer has been announced this last month, and a prototype to manage SoftLayer Virtual Guests using OpenNebula is on the works. The same plan applies to other leading cloud provider, a partnership will be announced soon and a prototype will be ready shortly! Good news for the community, more choice to the cloud users and administrators. And did we say relentless? More partnerships and more public cloud provider support are being crafted ….

Meanwhile, and as part of our commitment with the latest stable version, OpenNebula 4.6.1 Carina was released. This release (4.6.1) comes with several bug fixes found after the latest release, namely bug that prevented VM monitoring information purge (which increased exponentially the disk usage in the OpenNebula front-end) and a Xen related bug affecting VNC. Moreover, OpenNebula 4.6.1 brings a new long overdue feature to the table: accounting information in Sunstone!. Isn’t it pretty?


Two new versions of the excellent Addon, AppMarket 2.0 and AppMarket 2.0.1 were released. These releases are part of the AppMarket 2.0.x series, which extends the AppMarket functionality by adding a new set of features that enables the management and processing of OVA files. A new component AppMarket Worker is introduced, which handles the OVA package treatment (download, unpack, OVF parsing) and image format conversion. This release also features a new API, a new simplified import dialog, a new AppMarket interface via Sunstone, and handles VMware and VirtualBox OVAs.


OpenNebula community has been very active, producing high quality feedback to iron out the wrinkles in OpenNebula 4.6. This feedback was crucial in releasing OpenNebula 4.6.1, which fix bugs present in the first Carina version. It seems that the upgrade process is streamlined (as stated here,here and here ;) ), and overall the feedback on the new version was very positive!

It is also worth highlighting the smallest box containing a full fledged OpenNebula cloud. It is small, it is powerful, it is pretty: meet the smallest Cloud Weavers!.

Also, this kind of feedback from the OpenNebula users makes us blush and happy, and willing to keep OpenNebula in the right track!

A very cool integration between OpenNebula and The Foreman has been developed by the guys at Netways. It can be used to deploy virtual machines within OpenNebula using the Foreman interface which configures DNS,DHCP,PXE,Puppet and so on as well. The functionality is covered by using and extending the ruby fog library.

It is also very nice to find out that the European Grid Infrastructure counts with OpenNebula in their plans involving cloud technologies and infrastructures ;)


As usual, first things first, this year’s OpenNebula Conference will be held in Berlin as well, 2-4 of December, 2014. If you want to repeat or find out how it is for yourself, save the date! The Call for Papers and early registration prices are open until the 15th of July, don’t say we didn’t told you!

Last month we organized a Hands-on Tutorial in the EGI Community Forum, Helsinki, Finland. On the same event, a workshop about cloud architecture was held, where users shared their experiences with OpenNebula.

Another, more complete, 2 days OpenNebula administration course was given in Madrid, Spain, jointly with CENATIC. Also last month, guys from OneInsight presented their visualization plugin for OpenNebula in the CentOS Dojo in Lyon. Check it out here. This year’s LinuxTag also featured OpenNebula, The Foreman and CentOS, this time presented by guys at inovex, and your favorite CMP was also presented in the Secure Linux Administration Conference 2014.

We are setting up a number of OpenNebula TechDays around the world. These events are designed to learn about OpenNebula with a hands-on cloud installation and operation workshop, and presentations from community members and users. If you are interested in hosting or sponsoring one, let us know!. There will be two OpenNebula TechDays in the upcoming months in the USA, covering both the east and the west coast. The one in Florida will take place in Boca Raton the 19th of June, hosted by TransUnion, whereas the west coast will be covered by the Bay Area Techday the 24th of June, hosted by Hyve, which includes an exciting tour around the manufacturing plant of Facebook production racks. These events have so far confirmed speakers from IBM, inktank/RedHat and, of course, form the OpenNebula Project.

Remember that you can see slides and resources from past events in our Events page. We have also created a Slideshare account where you can see the slides from some of our recent presentations.