feat(postgres): Allow storage_type selection for RDS

Author: rr0hit

modules/postgres/rds/0.2/facets.yaml

@@ -150,6 +150,14 @@ spec:
               minimum: 0
           required:
           - instance
+    storage_type:
+      type: string
+      title: Storage Type
+      description: EBS volume type for database storage
+      default: "gp3"
+      enum:
+        - "gp2"
+        - "gp3"
     db_names:
       type: array
       title: Database Names

modules/postgres/rds/0.2/main.tf

@@ -24,7 +24,7 @@ locals {
   tags                  = merge(local.user_defined_tags, var.environment.cloud_tags)
   iops                  = local.storage_type == "gp2" ? null : local.storage_type == "gp3" && local.allocated_storage < 400 ? null : lookup(local.advanced_rds_postgres, "iops", 12000) < 12000 ? 12000 : lookup(local.advanced_rds_postgres, "iops", 12000)
   allocated_storage     = lookup(local.advanced_rds_postgres, "allocated_storage", 50)
-  storage_type          = lookup(local.advanced_rds_postgres, "storage_type", "gp3")
+  storage_type          = lookup(var.instance.spec, "storage_type", lookup(local.advanced_rds_postgres, "storage_type", "gp3"))
   max_allocated_storage = lookup(local.advanced_rds_postgres, "max_allocated_storage", 200)
   multi_az              = lookup(local.advanced_rds_postgres, "multi_az", false)
   availability_zone     = local.multi_az ? null : lookup(local.advanced_rds_postgres, "availability_zone", null) == null ? var.inputs.network_details.attributes.legacy_outputs.vpc_details.azs[0] : lookup(local.advanced_rds_postgres, "availability_zone", null)