Non Deterministic Terraform Plan when applying the same config

[rastogiji]

When trying to create a child module to create CGW Dataplane nodes, I'm using the following resource block with appropriate variable defintions

resource "konnect_cloud_gateway_configuration" "cgw-nodes" {
  version           = var.dp_version
  api_access        = var.api_access
  control_plane_geo = var.cp_geo
  control_plane_id  = konnect_gateway_control_plane.cgw-cp.id

  dataplane_groups = [for dp in var.dataplane_groups : {
    provider = dp.provider
    region = dp.region
    cloud_gateway_network_id = konnect_cloud_gateway_network.cgw-ns[dp.ns_name].id
    autoscale = var.dp_kind == "autopilot" ? {
        configuration_data_plane_group_autoscale_autopilot = {
            kind = var.dp_kind
            base_rps = dp.autopilot.base_rps
            max_rps = dp.autopilot.max_rps
        }} : {
            configuration_data_plane_group_autoscale_static = {
                kind = var.dp_kind
                instance_type = dp.static.instance_type
                requested_instances = dp.static.requested_instances
            }
    }
  }]
}

And I'm declaring it in the root module like below:

dataplane_groups = [{
        provider = "aws",
        region = "us-east-2",
        ns_name = "aws-ns",
        static = {
            instance_type = "medium",
            requested_instances = 1
        }
    },{
        provider = "aws",
        region = "us-west-2",
        ns_name = "aws-ns-2",
        static = {
            instance_type = "large",
            requested_instances = 1
        }
    }]

However, once I do the first tf apply, the plan becomes non deterministic on the order of the individual dataplane group. Sometimes it complains that the configuration has changed and tries to do an update operation against the API which returns with an error of provided and current configuration is the same. The video below showcases the problem:

https://github.com/user-attachments/assets/29cf53ec-e1cb-4c47-84f6-b1634c3e3076

[mheap]

This is something that we need to fix in the generator.

Prior art:

https://github.com/hashicorp/terraform-provider-aws/issues/22274 https://github.com/Azure/terraform-provider-azapi/pull/455

[mheap]

Using format: set in the spec makes this a SetNestedAttribute rather than a ListNestedAttribute. Should be resolved once https://github.com/Kong/terraform-provider-konnect/commit/87a08d4656d1e38f2925d62c06f4cb62bcf1b649 is released