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Posted by on in CloudStack Tips


Apache CloudStack 4.0 incubating has been released couple weeks ago now. The testing procedure used by the community to vote on the release candidate included using the new CloudStack sandbox DevCloud.

It's not too late to go through the testing procedure, just follow the steps defined on the wiki page.
If you want a shortcut, just watch my screencast and enjoy the french accent. 

You will see that one of the first things to do is to install DevCloud: A virtualbox appliance based on Ubuntu 12.04 and running a Xen Kernel. The CloudStack management server is pre-installed with a basic toy data center being configured. Thanks to nested virtualization this allows users to start virtual machine instances within the devcloud sandbox.

The key ingredient is nested virtualization. It is really nice for testing things but most likely less so if your are concerned with performance, even though I have not seen benchmarks on nested virtualization.

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Recently, Citrix announced that it will donate CloudStack to the Apache Software Foundation (ASF).  This is a very exciting moment in the history of the CloudStack project.  The ASF is the premier open source foundation in the world and it has a track record of successful, completely open projects.  The CloudStack project has been increasingly open during its life.  But, “increasingly open” isn’t good enough.  We have to be 100% open in our technical discussions to run the project in the meritocratic fashion that successful Apache projects use.  In this blog post I’ll do a brief review of CloudStack openness and list out the changes we’ll be making over the next few months to transform CloudStack from a largely single-entity development effort to a collaborative, community project.

CloudStack 1.0 was proprietary software.  Closed specs, closed discussion, closed bug database, closed source.  The CloudStack 2.0 release in May, 2010 transitioned CloudStack to an open-core model.  About 95% of the source was available under GPLv3 and the bug database was open, but the technical discussions were closed and few technical documents were publicly available.  In August, 2011 Citrix published 100% of the CloudStack source code.  We started publishing some technical specs, but the discussions were still closed.

In late 2011, in conjunction with the Acton release, we started doing a better job publishing technical specs.   Not perfect – we weren’t iterating the designs in the open – but good progress.  We also (finally) came up with a process for accepting contributions.  In 2012 we’ve created a publicly available project dashboard , started publishing meeting minutes, and getting a larger number of non-Citrix contributions.

That’s good stuff, but there are some fundamental changes needed to make it more open.  Instead of publishing designs and discussion results after the fact, we have to publish the earliest version and then iterate in the open.  We also have to have the technical discussions on the cloudstack-dev mailing list (see below for the new one), and not on our internal engineering list.  This will take policing -- and I’m part of the problem here -- but through force of will a few folks can make a big difference here.

We also need to ask more of the community.  Our bug database is open, but, there’s no place to go with an “ask-list”.  Nowhere can you easily see important features with no owner, nor can you easily search to find the bugs with the most votes.  We need to pick a few features with a variety of technical needs and ask the community to help out.  That part is easy, BTW.  CloudStack has so many potential integrations in the datacenter that just listing those would give years of work to interested parties!

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Citrix supports the open source community via developer support and evangeslism. We have a number of developers and evangelists that participate actively in the open source community in Apache Cloudstack, OpenDaylight, Xen Project and XenServer. We also conduct educational activities via the Build A Cloud events held all over the world.