Eucalyptus software has moved to being a single, free, open-source cloud platform, according to chief executive Mårten Mickos.
Eucalyptus version 3.1, due for release on June 27, will only exist as one edition, instead of as free and paid-for versions.
"There is just one Eucalyptus platform — and it is free and open-source code," Mickos said in a blog post on Tuesday. "You are welcome to get your own copy, play with it, modify it, and redistribute it."
Source code for the elastic, Amazon Web Services (AWS)-compatible IaaS platform has been made available on GitHub, with bug-tracking on Jira, said Mickos. Eucalyptus 3.1 has FastStart, which Mickos claims can let an administrator get a preconfigured and automated cloud up and running within 20 minutes. FastStart can be deployed on the CentOS 5 Linux operating system with a Xen hypervisor, or on CentOS 6 with a Kernel-based Virtual Machine (KVM) hypervisor.
Eucalyptus 3.1 will allow enterprise cloud deployments on Red Hat Enterprise Linux (RHEL), using Red Hat Enterprise Virtualization and VMware vCenter 5, with Amazon EC2, EBS, S3 and IAM APIs, according to a statement on Tuesday.
"Highly available, thoroughly tested, and with its industry-standard AWS API, Eucalyptus 3.1 is the leading open choice for on-premise and hybrid clouds," Mickos said in the statement.
By comparison, Eucalyptus 3.0, which was made available in February, had an AWS Identity and Access Management (IAM) API, supported VMware vSphere 4.X cloud operating system, and supported RHEL 5, RHEL 6, and Ubuntu Lucid 10.04.
Eucalyptus' main competitors are the Nasa-supported OpenStack project, and the Citrix-backed CloudStack initiative, which also offer free, open-source cloud platforms.