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The key to your solution lies with

pulumi.all([outputs]).apply(callbackFn)

. https://www.pulumi.com/docs/intro/concepts/inputs-outputs/#all Starting from outputs needed for the calculation of the user data, you pass these to

all

as a list, then call

apply

passing it a callback function. The callback function will be invoked by Pulumi by the time the actual values of your outputs are known. The arguments to your callback function will be the actual values that you can use to calculate the user data. The value of the user data is the return value of the callback function.

apply

will wrap this again in an

Output

which you can then pass to the resource taking this as an

Input

, e.g. an AWS EC2 resource. Hope my explanation makes sense.

Thank you! In the end, I remembered that I have to convert the object into the output then I could use

js-yaml

library to render the yaml.

const cloudInitYaml = pulumi.output(cloudInitConfig).apply(yaml.dump);