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Home > Release Notes > RightScale Cloud Management Platform > 2012-04-12


Table of Contents

Reminder: ServerTemplates and RightScripts are released separately from the new Release of the RightScale Cloud Management Platform. See the ServerTemplate and MultiCloud Images Release Notes.

General Release Information

Release Date: April 12th, 2012

Release Time: 5:00pm Pacific

The focus of this release is:

  • Added functionality for weighted arrays.
  • Introduction of OAuth token-based API authentication.

Contact Information:


  • alpha - Feature that has undergone simple testing and is expected to change, possibly significantly, before going into "beta" or "general availability." Recommended for early access to new features and prototyping of new deployments/architectures. Only eligible for limited technical support. Service Level Response times are not applicable to alpha software.
  • beta - Feature that has undergone significant testing and is not expected to significantly change before "general availability." Recommended for non-production deployments.
  • general availability - Feature that has undergone testing and field experience or is a minor upgrade from prior releases. Recommended for production upgrade after testing. 


New Features

- Disclaimer -

recently_intro_icon.gifThe following new features have been added to the RightScale Cloud Management Platform. Be sure to read the documentation, follow best practice principles, and thoroughly test any new functionality before making any changes to your production deployment.

Weighted Arrays across All Clouds

The ability to create a weighted array is now available for all RightScale-supported clouds. Previously, this feature was only available for Amazon EC2. When creating an array, you have the option to choose "weighted" in the Server Details tab of the Add Server Assistant. When choosing the "weighted" option, you may then enter proportions to describe precisely how you would like to scale across datacenters. For more information, see Add Server Array Assistant.

New Weighted Arrays Algorithm

The algorithm for weighted arrays has been improved in regards to the handling of availability zone / datacenter weights in the auto-scaling to avoid long-term imbalances in actual instance counts.

Descriptions for Security Groups Rules

For security groups, there is now the option to create a description for a rule. The ability to create and view descriptions for individual rules gives a clearer picture of what a particular security group does, and thus easier to manage. For more information, see Create a New EC2 Security Group.

Token-based API Authentication

Token-based API authentication is now offered with our implementation of an OAuth-compatible authentication and authorization feature. This feature is currently in private beta, and will begin by allowing users to log-in to the API without a password and make authenticated requests. This is done by executing an OAuth Grant via the UI, obtaining an API access token in order to make API requests without logging in, and making OAuth-authorized API requests using the obtained access token. This feature is only available for API 1.5. For access to this private beta feature, please contact your account manager or For more information, see OAuth.


Unresolved Issues and Bugs

Broken Changes Tab

Architectural changes related to the new Inputs UI affected the tracking history available on the Changes tab of a deployment. As a result, the input change history is not available. Due to this feature's lack of use, we would like to gauge the demand to re-implement it. Please give us your feedback here.


Many bugs were resolved with this release. If you are interested in inquiring about a particular issue, please contact



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