Skip user data if the module is disabled (#43)

* Skip user data if module is disabled

* Updated README.md

Co-authored-by: actions-bot <58130806+actions-bot@users.noreply.github.com>

Author: alexandrusavin

README.md

@@ -1,4 +1,6 @@
+<!-- markdownlint-disable -->
 # terraform-aws-ec2-bastion-server [![Build Status](https://travis-ci.org/cloudposse/terraform-aws-ec2-bastion-server.svg?branch=master)](https://travis-ci.org/cloudposse/terraform-aws-ec2-bastion-server) [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-aws-ec2-bastion-server.svg)](https://github.com/cloudposse/terraform-aws-ec2-bastion-server/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
+<!-- markdownlint-restore -->
 
 [![README Header][readme_header_img]][readme_header_link]
 
@@ -290,8 +292,10 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
 
 ### Contributors
 
+<!-- markdownlint-disable -->
 |  [![Erik Osterman][osterman_avatar]][osterman_homepage]<br/>[Erik Osterman][osterman_homepage] | [![Andriy Knysh][aknysh_avatar]][aknysh_homepage]<br/>[Andriy Knysh][aknysh_homepage] | [![Igor Rodionov][goruha_avatar]][goruha_homepage]<br/>[Igor Rodionov][goruha_homepage] | [![Bobby Larson][karma0_avatar]][karma0_homepage]<br/>[Bobby Larson][karma0_homepage] |
 |---|---|---|---|
+<!-- markdownlint-restore -->
 
   [osterman_homepage]: https://github.com/osterman
   [osterman_avatar]: https://img.cloudposse.com/150x150/https://github.com/osterman.png

main.tf

@@ -65,6 +65,7 @@ data "aws_route53_zone" "domain" {
 }
 
 data "template_file" "user_data" {
+  count    = module.this.enabled ? 1 : 0
   template = file("${path.module}/user_data.sh")
 
   vars = {
@@ -81,7 +82,7 @@ resource "aws_instance" "default" {
   ami           = var.ami
   instance_type = var.instance_type
 
-  user_data = data.template_file.user_data.rendered
+  user_data = data.template_file.user_data[0].rendered
 
   vpc_security_group_ids = compact(concat(aws_security_group.default.*.id, var.security_groups))