No arbiter when only 1 replica per shard

storage/onpremise/mongodb-sharded/main.tf

@@ -1,6 +1,7 @@
 locals {
   # To ensure image pull secrets are passed as an array/list and remove null value or empty strings
   image_pull_secrets = compact(try(tolist(var.mongodb.image_pull_secrets), [tostring(var.mongodb.image_pull_secrets)]))
+  arbiter_replicas   = var.sharding.shards.replicas > 1 ? 1 : 0
 
   configsvr_node_selector = coalesce(try(var.sharding.configsvr.node_selector, null), var.mongodb.node_selector)
   router_node_selector    = coalesce(try(var.sharding.router.node_selector, null), var.mongodb.node_selector)
@@ -122,7 +123,7 @@ resource "helm_release" "mongodb" {
         }
 
         "arbiter" = {
-          "replicaCount"      = 1
+          "replicaCount"      = local.arbiter_replicas
           "mongodbExtraFlags" = local.mongodb_extra_flags
           "nodeSelector"      = local.arbiter_node_selector