From 9ff0b0ab67fb125aa35047300fbde554534b31e6 Mon Sep 17 00:00:00 2001
From: Alen Komljen <alen.komljen@live.com>
Date: Fri, 12 Jun 2020 10:48:49 +0200
Subject: [PATCH] Ignore instance engine version updates

---
 main.tf | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/main.tf b/main.tf
index 6cb02ac..be28427 100644
--- a/main.tf
+++ b/main.tf
@@ -100,6 +100,14 @@ resource "aws_rds_cluster_instance" "this" {
   performance_insights_kms_key_id = var.performance_insights_kms_key_id
   ca_cert_identifier              = var.ca_cert_identifier
 
+  # Updating engine version forces replacement of instances, and they shouldn't be replaced
+  # because cluster will update them if engine version is changed
+  lifecycle {
+    ignore_changes = [
+      engine_version
+    ]
+  }
+
   tags = var.tags
 }