awslabs/aws-cfn-custom-resource-examples — pull request #1 by evandbrown (2013-11-20 18:36:45+00:00)
Title: Add example CR that allocates existing EIPs from a pool in DynamoDB

This example CR queries DynamoDB for available, pre-provisioned EIPs and returns the first unassigned address. Addresses are grouped into named pools, where pool name is the DDB HK and EIP addr is the DDB RK. The CR handles Create, Update, and Delete.