keylogin: Whether to use an SSH public key to login (TRUE) or a password (FALSE). Note that Windows does not support SSH key logins.
managed_identity: Whether to provide a managed system identity for the VM.
public: Whether the instances (nodes) of the scaleset should be visible from the public internet.
priority: 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.
delete_on_evict: If spot-priority VMs are being used, whether evicting (shutting down) a VM should delete it, as opposed to just deallocating it.
network_accel: Whether to enable accelerated networking. This option is only available for certain VM sizes.
large_scaleset: Whether to enable scaleset sizes > 100 instances.
overprovision: Whether to overprovision the scaleset on creation.
upgrade_policy: A list, giving the VM upgrade policy for the scaleset.
os_disk_type: 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.