Write a pulumi program using the random provider to repro: "pulumi up fails on update when using resource outputs as inputs to other resources"

Sure, here's a Pulumi program using the random provider to simulate the situation you've described. This program will first create a random string with an output, which we then use as an input to another resource.

However, note that this does not necessarily cause pulumi up to fail, as Pulumi is designed to handle such a situation where the output of one resource is used as the input of another. Failures could occur if there are cycles or dependencies that cannot be resolved, or code errors.

In our case, we are keeping this simple to illustrate resource-to-resource input-to-output relationship for you:

name: pulumi-random-error
runtime: nodejs
description: Reproduce update error for pulumi-random with resource outputs as inputs to others
main:
  - name: randomString
    type: random:index/randomStringRandomString
    args      length 10
      special false
  - name: randomPet
    type: random:index/randomPet:RandomPet
    args:
      length: "{{.outputs.length}}"
      prefix: "{{.outputs.result}}"
    dependsOn:
      - randomString

Link to the relevant resources in the Pulumi Registry documentation:

In this program, a random string is created by using the random:index/randomStringRandom resource. The output of this operation (length and result) are then used as inputs to the random:index/randomPet:RandomPet resource. The randomPet resource instance is declared to depend on the randomString instance, thus ensuring the correct order of execution.

pulumi up encounters an error during the update, it would likely be due to external circumstances, such as an issue with the random provider, rather than this input-output model.