How are log analytics workspaces that are connected to a cluster supposed to work?

Terraform Providers Azure
1

We have a log analytics workspace that we want to join to a log analytics cluster, but I’m not sure how we’re supposed to make this change in terraform. The azure provider docs say we need to use the log_analytics_linked_service resource which is fine, but there’s an issue with the sku. When a log analytics workspace is connected to a cluster the sku is LACluster which isn’t one of the options according to the registry docs. So no matter what we set sku to it wants to change, for example:

# azurerm_log_analytics_workspace.logs will be updated in-place
  ~ resource "azurerm_log_analytics_workspace" "logs" {
        id                                 = <LAW-id>
        name                               = <LAW-name>
      ~ sku                                = "LACluster" -> "CapacityReservation"
        tags                               = {}
        # (13 unchanged attributes hidden)
    }

but the docs also say

If a azurerm_log_analytics_workspace is connected to a azurerm_log_analytics_cluster via a azurerm_log_analytics_linked_service you will not be able to modify the workspaces sku field until the link between the workspace and the cluster has been broken by deleting the azurerm_log_analytics_linked_service resource.

So the sku change always fails. Trying to set the sku to LACluster doesn’t work because the provider won’t even get past the plan phase with “invalid” sku values.

I’m just not sure how this is supposed to work?

This is the relevant terraform we have

resource "azurerm_log_analytics_workspace" "logs" {
  name                = "${local.group_name}-law"
  location            = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name
  sku                 = var.sku
  retention_in_days   = var.log_retention
}

resource "azurerm_log_analytics_linked_service" "cluster_link" {
  resource_group_name = azurerm_resource_group.rg.name
  workspace_id        = azurerm_log_analytics_workspace.logs.id
  write_access_id     = var.log_analytics_cluster_id
}