Release: Amazon EC2 on 2008-03-27

items>Release: Amazon EC2 on 2008 03 27
This release introduces support for Amazon EC2 Elastic IP Addresses, Availability Zones, and User Selectable Kernels.


Submitted By: Bruce@AWS
Release Date: March 27, 2008 12:00 AM GMT
Latest Version: 2008-02-01
Latest WSDL:
Created On: March 26, 2008 11:42 PM GMT
Last Updated: April 16, 2008 3:51 PM GMT

New Features

Feature Description
Amazon EC2 Elastic IP Addresses Elastic IP addresses are static IP addresses designed for dynamic cloud computing. An Elastic IP address is associated with your account not a particular instance, and you control that address until you choose to explicitly release it. Unlike traditional static IP addresses, however, Elastic IP addresses allow you to mask instance or availability zone failures by rapidly remapping your public IP addresses to any instance in your account.
For more information, refer to the Amazon EC2 Developer Guide.
Amazon EC2 Availability Zones Amazon EC2 now provides the ability to place instances in multiple locations. Amazon EC2 locations are composed of regions and availability zones. Regions are geographically dispersed and will be in separate geographic areas or countries.
For more information, refer to the Amazon EC2 Developer Guide.
Amazon EC2 User Selectable Kernels Amazon EC2 now allows developers to use kernels other than the default Amazon EC2 kernels with their instances.
For more information, refer to the Amazon EC2 Developer Guide.
New Amazon Public AMIs and Kernels Available This release makes the following new AMIs and AKIs (Kernel IDs) available:
AMI: Fedora Core 6 - 32 bit - a stock FC6 release with matching kernel and RAM disk
AMI: Fedora 8 - 32 bit - a stock F8 release with matching kernel and RAM disk
AMI: Fedora 8 - 64 bit - a stock F8 release with matching kernel and RAM disk
AKI: 2.6.18 Kernel - 32 bit - a stock 2.6.18 kernel (can be used with 32 bit AMIs)
AKI: 2.6.18 Kernel - 64 bit - a stock 2.6.18 kernel (can be used with 64 bit AMIs)

Known Issues

Issue Description
Limitation of AuthorizeSecurityGroupIngress AuthorizeSecurityGroupIngress does not allow port ranges for group grants when using the command-line tools or the Query API. This is only supported through the SOAP API.
Elastic IP Addresses and Existing Connections After a remap of an Elastic IP to an instance, some preexisting communications (to the old and now unmapped IP address) may continue to work for some time. Because of the behavior of some network devices, existing communications (defined as established source IP, destination IP, port combinations) might continue to utilize preexisting mappings until the devices refresh their caches. These connections are not reliable after the remap. You should reestablish all communications after you remap. We will be working to purge all these caches much more quickly.
Instance type metadata not available in older AMIs.

The instance-type is only available as part of the instance metadata on instances that expose version 2007-09-28 of the instance metadata. Large and extra large instance types support this version. Small instances types (the original instance type) may not support this version yet, in which case the instance type of m1.small can be assumed. You can query supported versions using the following URL:

Instance limit New users are limited to a maximum of 20 concurrent instances. If you wish to run more than 20 instances, please complete the Amazon EC2 instance request form and your use case and instance increase will be considered.
Creation of Paid AMIs is limited We are currently accepting only a limited number of partners who will be able to create Paid AMIs. Users interested in selling their Amazon EC2 AMIs through this program should send an e-mail to Please include your name, AWS account ID, company name, and a detailed description of your AMI.
Console output availability There were some reports of full console output not being available. Full console output is only guaranteed for instances that were rebooted after this feature was released.
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