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I’m trying to use Google Cloud Storage as a backend with multiple projects. It seems that stacks get plainly stored in

<bucket>/.pulumi/stacks

so there seens to be no option to use a single self-managed backend for multiple projects, is that correct?

This is more like a convention because of the limitations of the custom backends… We do use inter stack references across projects. the important part to know is: if you use backends other then pulumi.com , then you should/must include the name of the project in the stack name and use the same backend for all you projects. e.g. if your project is called

my-project

, then your stacks for that project should be called something like this:

my-project.prod

and get the reference like this:

const infra = new pulumi.StackReference(`my-project.prod`);

Thank you for sharing Domi!