From 3266c47ff83de7ee299115453831d1096f64bc4e Mon Sep 17 00:00:00 2001
From: Chris Adams <chris@cadams.com.au>
Date: Wed, 12 Oct 2022 04:08:37 +1100
Subject: [PATCH] Auto instance refresh (#142)

* Support instance refresh

* Trigger instance refresh on launch template version updates
---
 main.tf | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/main.tf b/main.tf
index 1c79135..1915542 100644
--- a/main.tf
+++ b/main.tf
@@ -255,7 +255,7 @@ resource "aws_autoscaling_group" "bastion_auto_scaling_group" {
   name_prefix = "ASG-${local.name_prefix}"
   launch_template {
     id      = aws_launch_template.bastion_launch_template.id
-    version = "$Latest"
+    version = aws_launch_template.bastion_launch_template.latest_version
   }
   max_size         = var.bastion_instance_count
   min_size         = var.bastion_instance_count
@@ -291,6 +291,10 @@ resource "aws_autoscaling_group" "bastion_auto_scaling_group" {
     propagate_at_launch = true
   }
 
+  instance_refresh {
+    strategy = "Rolling"
+  }
+
   lifecycle {
     create_before_destroy = true
   }