There are several bootstrap methods for cloudformations: 1. Create
image with application ready to go 2. Use cloud-init to run a startup
script passed as userdata to the nova server create 3. Use the
CloudFormation instance helper scripts
This package contains files required for choice #3.
cfn-init - Reads the AWS::CloudFormation::Init for the instance
resource,
installs packages, and starts services
cfn-signal - Waits for an application to be ready before continuing,
ie:
supporting the WaitCondition feature
cfn-hup - Handle updates from the UpdateStack CloudFormation API
call
