So, more questions from students.  This time about Cloudformation, the very cool way to built AWS infrastructure declaratively.  I would hate to have to pick a favorite AWS service, but if I had to, Cloudformation would be it.

  • By default a stack rolls back on failure.  You can also keep any successful stack elements by setting disable rollback to true.  Can you have some elements of a stack that must have successful creation, and others that may fail without rollback?
    • Nope.  I’d break this up into two stacks and chain them.
  • Why is YAML now supported for Cloudformation templates?
  • Can you a dry run of a cloudformation template?

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