Is it possible to set a different region for 1 stack? I need to create a externally validated certificate for cloudfront in us-east-1 but the default region for the app is eu-west-1.

Does this help? https://docs.serverless-stack.com/constructs/App#region

I've tried overriding it in a stack but that then changes the region for the rest of the remaining stacks which causes choas!

If they all extend the stack you're setting a region for I can see that happening.

I've three separate stacks SslStack.js - this is the one I want it to create the cert in us-east-1 for cloud front SsrStack.js - SSR stack to be made in the default region WebsiteStack.js - Essentially a StaticSite deployment but this stack is dependant on Ssl and Ssr. When I change the region in the Ssl stack it seems to leak out into the others

That's weird. As a workaround, have you tried explicitly specifying the region in each stack?

This isn't possible, if you look at our nextjs construct you can see how we create a resource in another region for the cert using a custom resource. This is also the way CDK does it

Just to chime in guys, @Ollie Camp currently u can’t create an

sst.Stack

construct with a different region, but you can create a

cdk.Stack

. It’s not “officially” supported by SST, and we might change this down the road when we rethink the multi-region strategy for SST apps.