Virtual machine scaleset options
scaleset_options(keylogin = TRUE, managed_identity = TRUE, public = FALSE,
  priority = c("regular", "spot"), delete_on_evict = FALSE,
  network_accel = FALSE, large_scaleset = FALSE, overprovision = TRUE,
  upgrade_policy = list(mode = "manual"), os_disk_type = c("Premium_LRS",
  "StandardSSD_LRS", "Standard_LRS"))Whether to use an SSH public key to login (TRUE) or a password (FALSE). Note that Windows does not support SSH key logins.
Whether to provide a managed system identity for the VM.
Whether the instances (nodes) of the scaleset should be visible from the public internet.
The priority of the VM scaleset, either regular or spot. Spot VMs are considerably cheaper but subject to eviction if other, higher-priority workloads require compute resources.
If spot-priority VMs are being used, whether evicting (shutting down) a VM should delete it, as opposed to just deallocating it.
Whether to enable accelerated networking. This option is only available for certain VM sizes.
Whether to enable scaleset sizes > 100 instances.
Whether to overprovision the scaleset on creation.
A list, giving the VM upgrade policy for the scaleset.
The type of primary disk for the VM. Change this to "StandardSSD_LRS" or "Standard_LRS" if the VM size doesn't support premium storage.