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From Deepal jayasinghe <>
Subject Re: [VOTE] CloudStack for Apache Incubator
Date Tue, 10 Apr 2012 15:05:57 GMT

> +1 (non binding)
> On Tue, Apr 10, 2012 at 10:51 AM, Davanum Srinivas <> wrote:
>> +1 binding
>> -- dims
>> On Apr 10, 2012, at 9:52 AM, Daniel Kulp <> wrote:
>>> +1  binding
>>> Dan
>>> On Monday, April 09, 2012 06:32:24 PM Kevin Kluge wrote:
>>>> Hi All.  I'd like to call for a VOTE for CloudStack to enter the
>>>> Incubator.  The proposal is available at [1] and I have also included it
>>>> below.   Please vote with: +1: accept CloudStack into Incubator
>>>> +0: don't care
>>>> -1: do not accept CloudStack into Incubator (please explain the objection)
>>>> The vote is open for at least 72 hours from now (until at least 19:00
>>>> US-PST on April 12, 2012).
>>>> Thanks for the consideration.
>>>> -kevin
>>>> [1]
>>>> Abstract
>>>> CloudStack is an IaaS ("Infrastracture as a Service") cloud orchestration
>>>> platform.
>>>> Proposal
>>>> CloudStack provides control plane software that can be used to create an
>>>> IaaS cloud. It includes an HTTP-based API for user and administrator
>>>> functions and a web UI for user and administrator access. Administrators
>>>> can provision physical infrastructure (e.g., servers, network elements,
>>>> storage) into an instance of CloudStack, while end users can use the
>>>> CloudStack self-service API and UI for the provisioning and management of
>>>> virtual machines, virtual disks, and virtual networks.
>>>> Citrix Systems, Inc. submits this proposal to donate the CloudStack source
>>>> code, documentation, websites, and trademarks to the Apache Software
>>>> Foundation ("ASF").
>>>> Background
>>>> Amazon and other cloud pioneers invented IaaS clouds. Typically these
>>>> clouds provide virtual machines to end users. CloudStack additionally
>>>> provides baremetal OS installation to end users via a self-service
>>>> interface. The management of physical resources to provide the larger
>>>> goal of cloud service delivery is known as "orchestration". IaaS clouds
>>>> are usually described as "elastic" -- an elastic service is one that
>>>> allows its user to rapidly scale up or down their need for resources.
>>>> A number of open source projects and companies have been created to
>>>> implement IaaS clouds. started CloudStack in 2008 and released
>>>> the source under GNU General Public License version 3 ("GPL v3") in 2010.
>>>> Citrix acquired, including CloudStack, in 2011. Citrix
>>>> re-licensed the CloudStack source under Apache License v2 in April, 2012.
>>>> Rationale
>>>> IaaS clouds provide the ability to implement datacenter operations in a
>>>> programmable fashion. This functionality is tremendously powerful and
>>>> benefits the community by providing:
>>>> - More efficient use of datacenter personnel
>>>> - More efficient use of datacenter hardware
>>>> - Better responsiveness to user requests
>>>> - Better uptime/availability through automation
>>>> While there are several open source IaaS efforts today, none are governed
>>>> by an independent foundation such as ASF. Vendor influence and/or
>>>> proprietary implementations may limit the community's ability to choose
>>>> the hardware and software for use in the datacenter. The community at
>>>> large will benefit from the ability to enhance the orchestration layer as
>>>> needed for particular hardware or software support, and to implement
>>>> algorithms and features that may reduce cost or increase user
>>>> satisfaction for specific use cases. In this respect the independent
>>>> nature of the ASF is key to the long term health and success of the
>>>> project.
>>>> Initial Goals
>>>> The CloudStack project has two initial goals after the proposal is
>>>> accepted and the incubation has begun.
>>>> The Cloudstack Project's first goal is to ensure that the CloudStack
>>>> source includes only third party code that is licensed under the Apache
>>>> License or open source licenses that are approved by the ASF for use in
>>>> ASF projects. The CloudStack Project has begun the process of removing
>>>> third party code that is not licensed under an ASF approved license. This
>>>> is an ongoing process that will continue into the incubation period.
>>>> Third party code contributed to CloudStack under the CloudStack
>>>> contribution agreement was assigned to in exchange for
>>>> distributing CloudStack under GPLv3. The CloudStack project has begun the
>>>> process of amending the previous CloudStack contribution agreements to
>>>> obtain consent from existing contributors to change the CloudStack
>>>> project's license. In the event that an existing contributor does not
>>>> consent to this change, the project is prepared to remove that
>>>> contributor's code. Additionally, there are binary dependencies on
>>>> redistributed libraries that are not provided with an ASF-approved
>>>> license. Finally, the CloudStack has source files incorporated from third
>>>> parties that were not provided with an ASF-approved license. We have
>>>> begun the process of re-writing this software. This is an ongoing process
>>>> that will extend into the incubation period. These issues are discussed
>>>> in more detail later in the proposal.
>>>> Although CloudStack is open source, many design documents and discussions
>>>> that should have been publicly available and accessible were not
>>>> publicized. The Project's second goal will be to fix this lack of
>>>> transparency by encouraging the initial committers to publicize technical
>>>> documentation and discuss technical issues in a public forum.
>>>> Current Status
>>>> Meritocracy
>>>> CloudStack was originally developed by Sheng Liang, Alex Huang, Chiradeep
>>>> Vittal, and Will Chan. Since the initial CloudStack version,
>>>> approximately 30 others have made contributions to the project. Today,
>>>> Sheng and Will are less involved in code development, but others have
>>>> stepped in to continue the development of their seminal contributions.
>>>> Most of the current code contributors are paid contributors, employed by
>>>> Citrix. Over the past six months CloudStack has received several
>>>> contributions from non-Citrix employees for features and bug fixes that
>>>> are important to the contributors. We have developed a process for
>>>> accepting these contributions that includes validating the execution of a
>>>> CLA and incorporating the contribution in the CloudStack in a manner that
>>>> reflects the contributor's identity. This process has not followed the
>>>> Apache model.
>>>> The CloudStack Project has had an open bug database for two years. While
>>>> this database includes ideas for enhancements to CloudStack, the
>>>> committers have historically not asked the greater community for pointed
>>>> assistance. Going forward the Project will encourage all community
>>>> members to become committers and will make clear suggestions for features
>>>> and bug fixes that would most benefit the community and Project.
>>>> Community
>>>> CloudStack has an existing community comprising approximately 8,000 forum
>>>> members on and 28,000 registrations for e-mail lists and
>>>> newsletters relating to CloudStack. All forums, developer and
>>>> administrator mailing lists, and IRC channels are active. A number of
>>>> commercial entities (e.g., RightScale, AppFog, EnStratus) and open source
>>>> projects (e.g., jClouds, Chef) have integrated with CloudStack.
>>>> To date, the community comprises users - people that download a CloudStack
>>>> binary and install it to implement an IaaS cloud. The project expects
>>>> that with independent governance and the openness of the Apache
>>>> development model we will significantly increase the amount of developer
>>>> participation within the community.
>>>> Core Developers
>>>> CloudStack spans a wide array of technologies: user interface,
>>>> virtualization, storage, networking, fault tolerance, database access and
>>>> data modeling, and Java, Python, and bash programming. There is
>>>> significant diversity of knowledge and experience in this regard.
>>>> Several of the initial committers have experience with other open source
>>>> projects. Alex Huang contributed to SCM-bug. Anthony Xu, Edison Su, Frank
>>>> Zhang, and Sheng Yang have prior experience with a combination of Xen and
>>>> KVM. Chiradeep Vittal has contributed to OpenStack. David Nalley has been
>>>> contributing to Fedora for several years. David has also contributed to
>>>> Zenoss, Cobbler, GLPI, OCS-NG, OpenGroupware, Ceph, and Sheepdog.
>>>> CloudStack development to date has largely been done in the U.S. and
>>>> India.
>>>> CloudStack has largely been developed by paid contributors.
>>>> Alignment
>>>> CloudStack has significant integration with existing Apache projects, and
>>>> there are several exciting opportunities for future cross-project
>>>> collaboration.
>>>> The CloudStack Management Server (i.e., the control plane) is deployed as
>>>> a web application inside one or more Tomcat instances.
>>>> The Management Server uses Apache Web Services, Apache Commons, Apache XML
>>>> RPC, Apache log4j, and Apache HttpComponents httpcore. It is built with
>>>> Apache Ant.
>>>> There are strong opportunities for collaboration with other Apache
>>>> Projects. Collaboration with Hadoop has at least two exciting aspects: -
>>>> CloudStack could provide an object store technology (similar to Amazon's
>>>> S3 service) in conjunction with the compute service (similar to Amazon's
>>>> EC2 service) that it already offers. HDFS from the Hadoop project is a
>>>> promising technology for the implementation of the object store. - It
>>>> would also be possible to have CloudStack provision Hadoop compute nodes,
>>>> either through virtualization or directly to baremetal. With this
>>>> CloudStack could become an optional or required part of the
>>>> infrastructure control plane for Hadoop.
>>>> ZooKeeper might be helpful to implement a distributed cloud control plane
>>>> in the future.
>>>> Derby could be used as alternative database; CloudStack currently uses
>>>> MySQL.
>>>> ActiveMQ is a good option for some of the communication that occurs in the
>>>> orchestration of the cloud.
>>>> It would be natural for Apache libcloud and Apache DeltaCloud to support
>>>> the CloudStack API and public clouds that expose it.
>>>> As mentioned earlier the proposers are seeking an independent foundation
>>>> to provide governance for the project. ASF has clearly been successful in
>>>> providing this, and we believe ASF is the best match for the future goals
>>>> of the project.
>>>> Known Risks
>>>> Orphaned products
>>>> Citrix will work with the community to create the most widely deployed
>>>> cloud orchestration software. Citrix's internal "plan of record" commits
>>>> significant budget to developing the Project through 2014. Investment
>>>> past 2014 is unspecified, but likely to continue given known and
>>>> predicted revenues from derivative commercial products.
>>>> Citrix is developing a thriving business in conjunction with the prior and
>>>> continued success of the community and use of CloudStack. The project may
>>>> be orphaned in the condition where the Project has failed to obtain
>>>> either non-paid committers or paid committers from other vendors, and the
>>>> committers paid by Citrix are re-assigned to another project.
>>>> Inexperience with Open Source
>>>> CloudStack has been open source since May, 2010, with the CloudStack 2.0
>>>> release by
>>>> From May, 2010 to August, 2011 CloudStack was "open core", wherein
>>>> approximately 95% of the code was available with a GPLv3 license and 5%
>>>> of the code was proprietary. During this time the bug database was open
>>>> and the source code was available. Project direction and technical
>>>> discussions occurred in a closed fashion. Few technical documents were
>>>> publicly available.
>>>> In August, 2011 CloudStack transitioned to 100% open source. The 5%
>>>> proprietary code was released publicly with a GPLv3 license. The bug
>>>> database remained open. Project direction and technical discussions
>>>> occurred in a closed fashion. Some technical documents were shared
>>>> publicly.
>>>> During 2012 the proposers have posted a significant fraction of technical
>>>> documents pertaining to the recent CloudStack 3.0 release publicly. Some
>>>> technical discussion has occurred in the open.
>>>> In April, 2012 CloudStack was re-licensed under the Apache License v2.
>>>> Several contributors have prior open source experience. This is discussed
>>>> in the "Core Developers" section.
>>>> The CloudStack development process must change significantly to conform to
>>>> the Apache model. These changes include: carry on all technical
>>>> conversations in a public forum, develop all technical documentation
>>>> publicly, follow the vote process on contribution approvals, and promote
>>>> individuals beyond the initial committers to committer status, based on
>>>> merit.
>>>> Homogenous Developers
>>>> The Project has committers in two locations in India, one location in the
>>>> UK, and one location in the U.S. The technical knowledge of the
>>>> committers is diverse, as evidenced by the wide range of technologies
>>>> that converge in CloudStack. The range of professional experience of the
>>>> committers is diverse as well, from a few months to 20+ years.
>>>> The initial committers are all associated with the sponsoring entity. The
>>>> Project will have to work with the community to diversify in this area.
>>>> Reliance on Salaried Developers
>>>> The initial committers are all salaried committers.
>>>> The initial committers have worked with great devotion to the project and
>>>> have enjoyed its success. We hope this will create an emotional bond to
>>>> the project that will last beyond their employment with Citrix Systems.
>>>> We expect salaried committers from a variety of companies. CloudStack is
>>>> an opportunity for many vendors to enable their software and hardware to
>>>> participate in the changes brought by the development of an API that can
>>>> manage datacenter infrastructure. It is also an opportunity for
>>>> datacenter operators to implement features they find helpful and share
>>>> them with the community.
>>>> We hope to attract unpaid committers. CloudStack is interesting technology
>>>> that solves many challenging problems, and cloud computing is popular in
>>>> the industry media now. But, few people will run a CloudStack deployment
>>>> for personal use, and this may limit our ability to attract unpaid
>>>> committers. We hope that the technical domain is interesting to new
>>>> committers that will join us in improving CloudStack.
>>>> Relationships with Other Apache Products
>>>> Please see the Alignment section above.
>>>> Apache Brand Awareness
>>>> We expect that licensing CloudStack under the AL and associating it with
>>>> the Apache brand will attract additional contributors and CloudStack
>>>> users. However, we have selected the ASF as the best governance option
>>>> for the project for the reasons discussed in the Rationale. Further, we
>>>> expect to continue development of the CloudStack under the AL with or
>>>> without the support of ASF.
>>>> Citrix currently sells a proprietary version of CloudStack released as
>>>> "Citrix CloudStack". For the foreseeable future, Citrix expects to
>>>> continue to sell orchestration software based on CloudStack. Citrix will
>>>> work with the ASF Incubator PMC and within the Podling Branding
>>>> guidelines to ensure that a new branding scheme is selected for Citrix's
>>>> proprietary version of CloudStack that is consistent with ASF's branding
>>>> policies.
>>>> Documentation
>>>> The CloudStack project has publicly available administrator documentation,
>>>> source code, forums, and technical specifications. This documentation is
>>>> available at the following sites: - forums, latest
>>>> news, downloads, blogs; a good starting point. -
>>>> installation guide, administration guide, API
>>>> documentation, technical specifications -
>>>> past and future release plans,
>>>> additional technical documentation - current
>>>> source. See the 3.0.x and master branches.
>>>> Initial Source
>>>> The genesis of CloudStack's source is discussed in the "Inexperience with
>>>> Open Source" section.
>>>> Citrix Systems currently owns the CloudStack code base. Committers use the
>>>> repository at to access and submit code. This repository is
>>>> located in the U.S.
>>>> We propose to donate the basis for the 3.0.x series of C
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