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Can anyone point me to docs on resource lifecycle? Specifically `create_before_destroy`. Can't find anything on the site or slack search

By default we create the new resource before destroying the old one, but you can override that by using <https://www.pulumi.com/docs/intro/concepts/programming-model/#deletebeforereplace|deleteBeforeReplace>

Hmm thanks. The docs for `acm.Certificate` say otherwise...is it an exception?

I think that's an error in our docs. I'll raise an issue for it

Yes I've checked this and the docs are wrong for `acm.Certificate`. We create before destroy (and that's why we do the auto-naming with the randomly generate suffix) to minimise the downtime. I've created an issue if you want to track this: <https://github.com/pulumi/docs/issues/5084>