Apache CloudStack

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CloudStack Logo.png
Original author(s) Cloud.com, Citrix
Developer(s) Apache Software Foundation
Stable release [1] / January 3, 2017; 13 months ago (2017-01-03)[1]
Written in Java (primarily)
Operating system Cross-platform for management servers, GNU/Linux for hosts, Windows, GNU/Linux, and BSD for guests (depending on hypervisor).[2]
Platform Java
Type Cloud computing
License Apache License 2
Website cloudstack.apache.org

CloudStack is open source cloud computing software for creating, managing, and deploying infrastructure cloud services. It uses existing hypervisors such as KVM, VMware ESXi|VMware vcenter and XenServer/XCP for virtualization. In addition to its own API, CloudStack also supports the Amazon Web Services (AWS) API[3] and the Open Cloud Computing Interface from the Open Grid Forum.[4]


CloudStack was originally developed by Cloud.com, formerly known as VMOps.[5]

VMOps was founded by Sheng Liang, Shannon Williams, Alex Huang, Will Chan, and Chiradeep Vittal in 2008.[6][7] The company raised a total of $17.6M in venture funding[8] from Redpoint Ventures, Nexus Ventures and Index Ventures (Redpoint and Nexus led the initial Series A funding round). The company changed its name from VMOps to Cloud.com on May 4, 2010, when it emerged from stealth mode by announcing its product.[9][5][10] Cloud.com was based in Cupertino, California.

In May 2010, Cloud.com released most of CloudStack as free software under the GNU General Public License, version 3 (GPLv3).[11] They kept about 5% proprietary.[12] Cloud.com and Citrix both supported OpenStack, another Apache-licensed cloud computing program, at its announcement in July 2010.[13][14][15]

In October 2010, Cloud.com announced a partnership with Microsoft to develop the code to provide integration and support of Windows Server 2008 R2 Hyper-V to the OpenStack project.[16]

Citrix Systems purchased Cloud.com on July 12, 2011, for approximately $200 million.[17][18][19] In August 2011, Citrix released the remaining code under the Apache Software License with further development governed by the Apache Foundation.[12] In February 2012, Citrix released CloudStack 3.0. Among other features, this added support for Swift, OpenStack's S3-like object storage solution.[20] In April 2012, Citrix donated CloudStack to the Apache Software Foundation (ASF), 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.[21] On November 6, 2012, CloudStack 4.0.0-incubating was announced,[22] the first stable release after joining ASF. On March 20, 2013, CloudStack graduated from Apache Incubator and became a Top-Level Project (TLP) of ASF.[23] The first stable (maintenance) release after graduation is CloudStack 4.0.2.[24]

Key features[2][edit]

  • Built-in high-availability for hosts and VMs
  • 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

Supported hypervisors[edit]

  • LXC Host Containers on RHEL 7
  • Windows Server 2012 R2 (with Hyper-V Role enabled)
  • Hyper-V 2012 R2
  • CentOS 6.2+ and 7.1 with KVM
  • Red Hat Enterprise Linux 6.2 and 7.1 with KVM
  • Ubuntu 14.04 with KVM
  • XenServer versions 6.1, 6.2 SP1 and 6.5 with latest hot fixes
  • VMware vSphere versions 5.0 Update 3a, 5.1 Update 2a, and 5.5 Update 2

BareMetal hosts[edit]

  • RHEL or CentOS, v6.2 or 6.3 and 7.1
  • Fedora 17
  • Ubuntu 12.04

Deployment architecture[edit]

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).[25]

Multiple management servers can be configured for redundancy and load balancing, all pointing to a common MySQL database.


In July 2012 it was reported that Datapipe launched the largest international public cloud to be built on CloudStack, which included 6 data centers in the USA, Britain, and Asia.[26]

Apache CloudStack has a number of users:[27][28]


  1. ^ a b "Apache CloudStack GitHub Releases". 
  2. ^ a b "Features". CloudStack. Retrieved 2016-09-02. 
  3. ^ "Supported AWS API Calls". Retrieved May 17, 2013. 
  4. ^ "OCCI Interface to CloudStack". Retrieved Feb 26, 2014. 
  5. ^ a b Timothy Prickett Morgan (May 4, 2010). "Cloud.com takes on virty infrastructure". The Channel. Retrieved December 12, 2017. 
  6. ^ John Fontana (January 28, 2009). "Start-up VMOps aims to ease cloud deployments". Network World. Retrieved June 1, 2013. 
  7. ^ "Company Overview". VMOps web site. Archived from the original on January 22, 2009. Retrieved June 1, 2013. 
  8. ^ "More Cash for Hot New Cloud Startup, VMOps". Gigaom.com. February 18, 2010. Retrieved June 18, 2012. 
  9. ^ "Cloud.com Launches, Extends Leadership Team and Announces New Funding" (Press release). Cloud.com. May 4, 2010. Archived from the original on September 19, 2010. 
  10. ^ Dave Rosenberg (May 4, 2010). "Cloud.com software stack goes open source". Software, Interrupted. CNET News. Retrieved June 18, 2012. 
  11. ^ "Cloud.com launches, announces funding, open source" (Press release). May 4, 2010. Archived from the original on September 18, 2010. 
  12. ^ a b "CloudStack Process Changes: Working the Apache Way". CloudStack. April 17, 2012. Archived from the original on April 29, 2012. 
  13. ^ "NASA and Rackspace open source cloud fluffer". The Register. July 19, 2010. Retrieved May 27, 2012. 
  14. ^ Peder Ulander (July 22, 2010). "You Are Now Free to Move About in the Cloud". OpenStack blog. Retrieved June 1, 2013. 
  15. ^ Clark, Jack (July 19, 2010). "Nasa, Rackspace launch OpenStack cloud interoperability scheme | Cloud | ZDNet UK". Zdnet.co.uk. Retrieved June 18, 2012. 
  16. ^ Harris, Derrick Harris (October 22, 2010). "Microsoft Joins OpenStack to Add Hyper-V Support." Gigaom.com. Retrieved November 2011.
  17. ^ "Citrix & Cloud.com". Citrix.com. July 12, 2011. Retrieved June 18, 2012. 
  18. ^ "Citrix Makes a Run at the Cloud". BusinessWeek. July 14, 2011. Retrieved May 27, 2012. 
  19. ^ "Citrix Buys Cloud.com for More Than $200 Million; Redpoint Is on a Roll". TechCrunch. July 12, 2011. Retrieved May 27, 2012. 
  20. ^ "Citrix CloudStack 3 Brings the Power of Amazon-Style Clouds to Customers of All Sizes". Citrix. February 13, 2012. Retrieved May 27, 2012. 
  21. ^ "Citrix Splits With OpenStack, Takes Cloud to Apache". Wired. April 4, 2012. Retrieved May 27, 2012. 
  22. ^ "Apache CloudStack 4.0.0-incubating Released". Apache Software Foundation. November 6, 2012. Retrieved May 17, 2013. 
  23. ^ "CloudStack Project Incubation Status". Apache Software Foundation. March 20, 2013. Retrieved May 17, 2013. 
  24. ^ "Apache CloudStack 4.0.2 Released". Apache Software Foundation. April 24, 2013. Retrieved May 17, 2013. 
  25. ^ "Deployment Architecture Overview". CloudStack. Retrieved May 17, 2013. 
  26. ^ "Datapipe launches largest CloudStack deployment". NetworkWorld. July 17, 2012. Retrieved Jan 31, 2013. 
  27. ^ "Are these people really all using CloudStack?". 
  28. ^ "CloudStack Users Apache Wiki". 

External links[edit]

User groups[edit]