FIX: Allow 0 as rebalancing_min_nodes value

castai/resource_rebalancing_schedule.go

@@ -92,7 +92,7 @@ func resourceRebalancingSchedule() *schema.Resource {
 						"rebalancing_min_nodes": {
 							Type:             schema.TypeInt,
 							Optional:         true,
-							ValidateDiagFunc: validation.ToDiagFunc(validation.IntAtLeast(1)),
+							ValidateDiagFunc: validation.ToDiagFunc(validation.IntAtLeast(0)),
 							Description:      "Minimum number of nodes that should be kept in the cluster after rebalancing.",
 						},
 						"keep_drain_timeout_nodes": {

castai/resource_rebalancing_schedule_test.go

@@ -43,6 +43,13 @@ func TestAccResourceRebalancingSchedule_basic(t *testing.T) {
 					resource.TestCheckResourceAttr("castai_rebalancing_schedule.test", "schedule.0.cron", "1 4 * * *"),
 				),
 			},
+			{
+				Config: makeUpdatedMinNodes(rName + " min_nodes_zero"),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr("castai_rebalancing_schedule.test", "name", rName+" min_nodes_zero"),
+					resource.TestCheckResourceAttr("castai_rebalancing_schedule.test", "launch_configuration.0.rebalancing_min_nodes", "0"),
+				),
+			},
 		},
 	})
 }
@@ -103,3 +110,25 @@ resource "castai_rebalancing_schedule" "test" {
 `
 	return fmt.Sprintf(template, rName)
 }
+
+func makeUpdatedMinNodes(rName string) string {
+	template := `
+resource "castai_rebalancing_schedule" "test" {
+	name = %q
+	schedule {
+		cron = "1 4 * * *"
+	}
+	trigger_conditions {
+		savings_percentage = 1.23456
+	}
+	launch_configuration {
+		rebalancing_min_nodes = 0
+		execution_conditions {
+			enabled = true
+			achieved_savings_percentage = 10
+		}
+	}
+}
+`
+	return fmt.Sprintf(template, rName)
+}