Work done by Debasis Roy Choudhuri, Bharat Bagai, Joydipto Banerjee, Udaya Keshavadasu, Rajeev D Samuel, Mitesh Chunara & Krishna Singh at the Business Application Modernization (BAM) Department of IBM India.

In our previous post, we had shown how to implement Cloud management with OpenNebula in a nested VMware environment. That is mostly a Cloud administration work. In this blog, we will focus more from the end users’ point of view. This exercise was also done at the Business Application Modernization (BAM) department of IBM India.


The goal was to setup a self-service portal based on EC2 query interface from where Cloud users can provision and launch various images that are available. Also users can avail the Public Cloud services of Amazon.


To test this scenario we can use either HybridFox or ElasticFox plug-ins. In our scenario, we used HybridFox version 1.7.000119 on client end with Mozilla browser. On FrontEnd machine, you have to install the pre-requisite called ‘gems’ to access amazon-ec2 like interface. Later on with the help of this interface you can connect to Amazon Web Services. There will be certain changes in configuration files that you have to perform on FrontEnd machine.

  • File econe.conf:
    :one_xmlrpc: http://localhost:2633/RPC2
    :port: 4567
    :auth: ec2
    :template: m1.small.erb
  • File EC2QueryClient.rb: Verify that Signature Method refers to ‘HmacSHA256’
  • File EC2CloudAuth.rb:
    # Calculates signature version 1
    def signature_v1(params, secret_key, digest='sha1')
    + params.delete(:econe_host)
    + params.delete(:econe_port)
    req_desc = params.sort {|x,y| x[0].downcase <=> y[0].downcase}.to_s
    digest_generator =

Once you integrate plug-in with Mozilla and restart econe service on FrontEnd machine, go to Mozilla browser and add your region

Here, AWS Secret Access Key refers to SHA1 password that you can see through oneuser command

Then you will get your EC2 Interface.

This way, you can add more regions with credentials to access other’s cloud. You can also launch virtual machines and other stuff from this interface.

Bharat Bagai,

OpenNebula 2.0 emphasizes interoperability and portability, providing cloud users and administrators with choice across most popular cloud interfaces, hypervisors and public clouds for hybrid cloud computing deployments, and with a flexible software that can be installed in any hardware and software combination. The functionality provided by the new version of OpenNebula and the components in its quickly growing ecosystem enable:

Because two data centers are not the same, building a cloud computing infrastructure requires the integration and orchestration of the underlying existing IT systems, services and processes. OpenNebula enables interoperability and portability, recognizing that our users have data-centers composed of different hardware and software components for security, virtualization, storage, and networking. Its open, architecture, interfaces and components provide the flexibility and extensibility that many enterprise IT shops need for internal cloud adoption. You only have to chose the right design and configuration in your Cloud architecture depending on your existing IT architecture and the execution requirements of your service workload.

Ignacio M. Llorente

The dsa-research group is pleased to announce that a stable release (v1.0) of the OpenNebula (ONE) Virtual Infrastructure Engine is available for download under the terms of the Apache License, Version 2.0. ONE enables the dynamic allocation of virtual machines on a pool of physical resources, so extending the benefits of existing virtualization platforms from a single physical resource to a pool of resources, decoupling the server not only from the physical infrastructure but also from the physical location.

Main Features

The OpenNebula Virtual Infrastructure Engine differentiates from existing VM managers in its highly modular and open architecture designed to meet the requirements of cluster administrators. The last version supports Xen and KVM virtualization platforms to provide the following features and capabilities:

  • Centralized management, a single access point to manage a pool of VMs and physical resources.
  • Efficient resource management, including support to build any capacity provision policy and for advance reservation of capacity through the Haizea lease manager
  • Powerful API and CLI interfaces for monitoring and controlling VMs and physical resources
  • Easy 3rd party software integration to provide a complete solution for the deployment of flexible and efficient virtual infrastructures
  • Fault tolerant design, state is kept in a SQLite database.
  • Open and flexible architecture to add new infrastructure metrics and parameters or even to support new Hypervisors.
  • Support to access Amazon EC2 resources to supplement local resources with cloud resources to satisfy peak or fluctuating demands.
  • Ease of installation and administration on UNIX clusters
  • Open source software released under Apache license v2.0
  • As engine for the dynamic management of VMs, OpenNebula is being enhanced in the context of the RESERVOIR project (EU grant agreement 215605) to address the requirements of several business use cases.

More details at

Relevant Links

  • Benefits and Features:
  • Documentation:
  • Release Notes:
  • Download:
  • Ecosystem: