A big problem of many tools out there, and of cloud formation in general, is that validation is a mess. And the bigger the template, the bigger the problem, even with existing tools.<p>There are validation problems even within specific tools: Just look at the RDS setup alone: A ton of options that are often mutually exclusive. It&#x27;s brutal. And don&#x27;t get me started with security groups.<p>At Monsanto, we built our own toolset, and open sourced it. It is all Scala, so it might be a bit of a learning curve for many folks, but there&#x27;s an actual attempt in there at making sure that if you can write it, have the tool blow up before it gets to AWS, which then realizes something went wrong, and that it has to roll everything back.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;MonsantoCo&#x2F;cloudformation-template-generator" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;MonsantoCo&#x2F;cloudformation-template-genera...</a>