Tracking the state of dependent resources

[0UserName]

Terraform Version

Terraform v1.1.7 on windows_amd64.

rabbitmq = {

  source  = "cyrilgdn/rabbitmq"
  version = "1.6.0"
}

Affected Resource(s)

The problem is relevant for any resource that can be dependent on another resource, but reproduced for rabbitmq_binding.

Terraform Configuration Files

Not required.

Debug Output

N/A.

Panic Output

N/A.

Expected Behavior

The provider must track the state of dependent resources, i.e. recreating the queue should lead to recreating the binding between the queue and the exchange.

Actual Behavior

  # module.bus_service.module.rabbitmq_queue["queue"].rabbitmq_queue.queue must be replaced
-/+ resource "rabbitmq_queue" "queue" {
      ~ id    = "queue_name@/" -> (known after apply)
        name  = "queue_name"
        # (1 unchanged attribute hidden)

      ~ settings {
          - arguments      = {} -> null
          ~ arguments_json = jsonencode(
              ~ {
                  ~ x-queue-type             = "quorum" -> "classic"
                  - x-single-active-consumer = true -> null
                } # forces replacement
            )
            # (2 unchanged attributes hidden)
        }
    }

Terraform state reflects only the change in the queue type, the queue is subsequently recreated and the binding is lost.

Steps to Reproduce

1. Create rabbitmq_exchange resource.

2. Create rabbitmq_queue resource.

3. Create rabbitmq_binding resource that binds the exchange from step 1 and the queue from step 2.

4. Apply

5. Change queue type from classic -> quorum or quorum -> classic

6. Apply

Important Factoids

N/A.

References

/api/queues/vhost/name/bindings - A list of all bindings on a given queue.

[0UserName]

Implemented in a fork.