The Apache CloudStack Blog

Wednesday Jun 05, 2013

Apache CloudStack 4.1.0 Released

square-cloudmonkey.png The Apache CloudStack project is pleased to announce the 4.1.0 release of the CloudStack Infrastructure-as-a-Service (IaaS) cloud orchestration platform. This is the first major release from Apache CloudStack since its graduation from the Apache Incubator on March 20th.

Apache CloudStack is an integrated software platform that allows users to build a feature-rich IaaS. CloudStack includes an intuitive user interface and rich API for managing the compute, networking, accounting, and storage resources for private, hybrid, or public clouds.

The 4.1.0 release represents more than five months of development effort by the Apache CloudStack community. The release includes many new features and bugfixes from the 4.0.x cycle. The 4.1.0 release also marks major changes in the codebase to make CloudStack easier for developers, a new structure for creating RPM/Debian packages, and completes the changeover to using Maven as a build tool.

New Features

Some of the notable new features in Apache CloudStack 4.1.0 include:

  • An API discovery service that allows an end point to list its supported APIs and their details.
  • Added an Events Framework to CloudStack to provide an “event bus” with publish, subscribe, and unsubscribe semantics. Includes a RabbitMQ plugin that can interact with AMQP servers. Introduces the notion of a state change event.
  • Implement L3 router functionality in the Nicira NVP plugin, and including support for KVM (previously Xen-only).
  • API request throttling to prevent attacks via frequent API requests.
  • AWS-style regions.
  • Egress firewall rules for guest networks.
  • Resizing root and data volumes.
  • Reset SSH key to access VMs.
  • Support for EC2 Query API.
  • Autoscaling support in conjunction with load balancing devices such as NetScaler.


The official source is available from:

In addition to the official source code release, individual contributors also make convenience binaries available. 4.1.0 convenience binaries should be available within a day or so of the release announcement.

Note that there is a known issue with 4.1.0 and a recent Tomcat release. This has been addressed in the convenience binaries, but is still present in 4.1.0 source release. We will be working on a 4.1.1 release that will contain that fix shortly.

CloudStack Collaboration Conference

The CloudStack community will be gathering for its second conference this month in Santa Clara, CA. The event will start on June 23rd with a hackathon, then formal programming on June 24th and 25th. This year we’ve gotten some fantastic keynotes, including DevOps legend Gene Kim (author of “The Phoenix Project”). You can find all the details at, and the schedule at

About Apache CloudStack

Apache CloudStack is a complete software suite for creating Infrastructure-as-a-Service (IaaS) clouds. Target environments include service providers and enterprises. It is used by many service providers to set up an on-demand, elastic cloud computing services and by enterprises to set up a private cloud for use by their own employees. Apache CloudStack is also available to individuals and organizations that wish to study and implement an IaaS for personal, educational, and/or production use.

Further information on Apache CloudStack can be found at


4.1 Installation docs includes mainly 4.0 related info (examples 4.4.1. DEB package repository (still refers 4.0) 4.5.3. Install the Management Server on the First Host (still refers packages do not exits in 4.1 repo)

Posted by SI on June 05, 2013 at 08:02 PM UTC #

The links for pdf files into Cloudstack Documentation section for version 4.1.0 are pointed to wrong files.

Posted by DM on June 06, 2013 at 08:48 AM UTC #

The links for the 4.1.0 release installation guide points to a release documentation which is different from the installation guide itself. Where can one find the right file?

Posted by Fajobi Segun on June 28, 2013 at 04:05 AM UTC #

... maybe that's why the login with default admin user after a fresh 4.1.0 install is disabled per default and, after enabling it, ends up with "The given command:listCapabilities does not exist or it is not available for user with id:2" .... Does anybody know how to solve that problem ? That would be great ... Thanx in advance Rainer_E.

Posted by Rainer Ehrenfels on July 15, 2013 at 02:18 PM UTC #

Thanks for this post,it is a rain drop post…i like it.

Posted by affordable vacations on September 01, 2013 at 08:18 AM UTC #

How to set up private cloud? Can any one tell me what are the hardware requirements and software requirements to set up a private cloud for about 500 computers should me moved on cloud with a single server?

Posted by rajpal on September 13, 2013 at 06:27 AM UTC #

How to set up private cloud? Can any one tell me what are the hardware requirements and software requirements to set up a private cloud for about 500 computers should me moved on cloud with a single server?

Posted by rajpal on September 13, 2013 at 06:37 AM UTC #

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