You might be interested to check out the Ruby on Rails example, if you haven't seen it. This is just a sample so not everything works, but it demonstrates using a subset of the CloudInit-style VM initialization that CloudFormation supports: https://github.com/pulumi/examples/blob/master/aws-ts-ruby-on-rails/index.ts This still doesn't support the synchronization with completion, however, a la

cfn-init

and signals.