Added support for TCP port selection in security group.

main.tf

@@ -20,6 +20,10 @@ variable "rds_engine_version" {
   default = "5.6.27"
 }
 
+variable "rds_tcp_port" {
+    default = "3306"
+}
+
 variable "rds_allocated_storage" {
   description = "The allocated storage in GBs"
   default = "100"
@@ -75,8 +79,8 @@ resource "aws_security_group" "rds" {
   description = "${var.rds_instance_name} RDS SG"
 
   ingress {
-    from_port       = 3306
-    to_port         = 3306
+    from_port       = "${var.rds_tcp_port}"
+    to_port         = "${var.rds_tcp_port}"
     protocol        = "tcp"
     security_groups = ["${var.security_groups}"]
   }