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| frequently updated = <!-- DO NOT include this parameter unless you know what it does -->
| programming language = [[Java (programming language)|Java]]
| operating system = GNU/Linux for management server and hosts,<ref>{{cite web | url=http://incubator.apache.org/cloudstack/docs/en-US/Apache_CloudStack/4.0.0-incubating/html/Installation_Guide/minimum-system-requirements.html | title=Minimum System Requirements | publisher=CloudStack | accessdate=Jan 31, 2013}}</ref> Windows, GNU/Linux, and BSD for guests (depending on hypervisor).<ref name="Features">{{cite web | url=http://incubator.apache.org/cloudstack/software/features.html | title=Features | publisher=CloudStack | accessdate=May 27, 2012}}</ref>
| platform = [[Java (software platform)|Java]]
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[[Citrix]] purchased Cloud.com on July 12, 2011, for approximately $200 million.<ref>{{cite news | url=http://www.businessweek.com/magazine/citrix-makes-a-run-at-the-cloud-07142011.html | title=Citrix Makes a Run at the Cloud | work=BusinessWeek | date=July 14, 2011 | accessdate=May 27, 2012}}</ref><ref>{{cite news | url=http://techcrunch.com/2011/07/12/citrix-buys-cloud-com-for-more-than-200-million-redpoint-is-on-a-roll/ | title=Citrix Buys Cloud.com for More Than $200 Million; Redpoint Is on a Roll | work=TechCrunch | date=July 12, 2011 | accessdate=May 27, 2012}}</ref> In August 2011, Citrix released the remaining code under GPLv3 and continued moving towards more open processes.<ref name="cloudstack process changes" /> In February 2012, Citrix released CloudStack 3.0. Among other features, this added support for [[OpenStack#Object_Storage_.28Swift.29|Swift]], OpenStack's S3-like object storage solution.<ref>{{cite web | url=http://www.citrix.com/English/ne/news/news.asp?newsID=2321271 | title=Citrix CloudStack 3 Brings the Power of Amazon-Style Clouds to Customers of All Sizes | publisher=Citrix | date=February 13, 2012 | accessdate=May 27, 2012}}</ref> In April 2012, Citrix donated CloudStack to the [[Apache Software Foundation]], where it was accepted into the [[Apache Incubator]]; Citrix changed the license to the [[Apache License]] version 2. As part of this change, Citrix also ceased their involvement in [[OpenStack]].<ref>{{cite news | url=http://www.wired.com/wiredenterprise/2012/04/citrix-cloudstack/ | title=Citrix Splits With OpenStack, Takes Cloud to Apache | work=Wired | date=April 4, 2012 | accessdate=May 27, 2012}}</ref>
== Key features ==
*Built-in high-availability for hosts and VMs<ref name="Features" />
*AJAX web GUI for management
*AWS API compatibility
*Hypervisor agnostic
*Snapshot management
*Usage metering
*Network management (VLAN's, security groups)
*Virtual routers, firewalls, load balancers
*Multi-role support
== Deployment Architecture ==
The minimum production installation consists of one machine running the CloudStack Management Server and another machine to act as the cloud infrastructure (in this case, a very simple infrastructure consisting of one host running hypervisor software). In its smallest deployment, a single machine can act as both the Management Server and the hypervisor host (using the KVM hypervisor).<ref>{{cite web | url=http://incubator.apache.org/cloudstack/docs/en-US/Apache_CloudStack/4.0.0-incubating/html/Admin_Guide/deployment-architecture-overview.html | title=Deployment Architecture Overview | publisher=CloudStack | accessdate=Jan 31, 2013}}</ref>
Multiple management servers can be configured for redundancy and load balancing, all pointing to a common MySQL database.
== See also ==
{{Portal|Free software}}
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