fcoelho

If you put a role ARN in the principal section of a bucket policy, AWS will check if the role exists and fail the policy update request if not. Even if it's not in the same account. Don't know if there's another way but you can manually enumerate roles from there

On canary deployments, if you can wait a bit to make a decision, CodeDeploy should have canary deployments available soon-ish: https://github.com/aws/containers-roadmap/issues/229