feat(nebula): support system data store placement

modules/nebula/main.tf

@@ -32,6 +32,11 @@ variable "one_prod_ds" {
   default = "101"
 }
 
+variable "one_sys_datastore" {
+  default = "100"
+}
+
+
 // system image
 resource "opennebula_image" "system" {
   for_each = var.vms
@@ -88,6 +93,8 @@ resource "opennebula_template" "vm_template" {
     image_id = opennebula_image.data[each.key].id
   }
 
+  sched_ds_requirements = ( each.value.sysdatastore != "" ? each.value.sysdatastore : var.one_sys_datastore )
+
   os {
     arch = "x86_64"
     boot = "disk0,nic0"