Hi, is it possible to have the same resource exist in 2 different stacks? Let's say that I have a pulumi project with 2 stacks,

staging

and

prod

, and there is one resource that needs to be global (let's say an S3 bucket, for simplicity). Can this bucket "exists" in both stacks, without being created twice, assuming that it's

resource_name

and configurations are exactly the same between them ?

You could

import

it (docs) but be mindful that either stack can delete it. You could also use the

.get()

method for one of the stacks. In your case,

prod

creates it, and

staging

would use

.get

I am aware of imports or "get" methods, the problem is that this is a pulumi defined resource, it's not created outside of pulumi

yep, you'd need to create it in one stack, then import/`.get` afterwards in the second stack

I've done this using stack references and conditional code in my Pulumi program based on which stack is being updated. If it's "staging", create the resource. If it's "production", use a stack reference to the staging stack to get a "reference" to the resource (i.e. to get its connection string or whatever).

I see. so in pseudo code:

current_stack = pulumi.get_stack()

if current_stack == 'staging':
    resource = aws.Resource(...)
else:
    resource = aws.Resource().get()

correct ?

correct. And like Donnie says, you can pass the name/ID around with stack references. Or hard code it if you're going for simplicity and know what it is

got it, tyvm

FWIW, I don't need an "import" to do what I'm doing. In C#, it's something like this:

var stagingStackReference = new StackReference("staging");

var communicationsServicesConnectionStringOutput = stagingStackReference.GetOutput("CommunicationsServicesConnectionString");
var signalRConnectionStringOutput = stagingStackReference.GetOutput("SignalRConnectionString");

I don't need the import, I believe, because I'm explicitly outputting the values I need for "production" when the "staging" stack runs.

yeah i think the import was suggested before I said that the resource too is created via pulumi

@millions-pharmacist-626 why do you need to do this?

Hi @billowy-army-68599, in my specific case it's because I'm configuring a Github OIDC provider in AWS, and only 1 can exist

ah, and you have one AWS account? I’d generally make this its own Pulumi project in this situation and have a single stack in there

you have one AWS account?

yep, only one

I’d generally make this its own Pulumi project in this situation and have a single stack in there

yeah sometimes I do this, in this specific case I couldn't be assed to do so and was wondering if there was a specific alternative. The stack check that has been suggested above is good enough tbh