feat: Allow MSK configuration changes on running clusters (#17)

Co-authored-by: Bryant Biggs <[email protected]>

README.md

@@ -13,7 +13,7 @@ module "msk_kafka_cluster" {
   source = "terraform-aws-modules/msk-kafka-cluster/aws"
 
   name                   = local.name
-  kafka_version          = "3.4.0"
+  kafka_version          = "3.5.1"
   number_of_broker_nodes = 3
   enhanced_monitoring    = "PER_TOPIC_PER_PARTITION"
 
@@ -129,12 +129,14 @@ Examples codified under the [`examples`](https://github.com/terraform-aws-module
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.0 |
 | <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 5.21 |
+| <a name="requirement_random"></a> [random](#requirement\_random) | >= 3.6 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
 | <a name="provider_aws"></a> [aws](#provider\_aws) | >= 5.21 |
+| <a name="provider_random"></a> [random](#provider\_random) | >= 3.6 |
 
 ## Modules
 
@@ -156,6 +158,7 @@ No modules.
 | [aws_msk_vpc_connection.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/msk_vpc_connection) | resource |
 | [aws_mskconnect_custom_plugin.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/mskconnect_custom_plugin) | resource |
 | [aws_mskconnect_worker_configuration.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/mskconnect_worker_configuration) | resource |
+| [random_id.this](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/id) | resource |
 | [aws_iam_policy_document.this](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
 
 ## Inputs

main.tf

@@ -247,13 +247,23 @@ data "aws_iam_policy_document" "this" {
 # Configuration
 ################################################################################
 
+resource "random_id" "this" {
+  count = var.create && var.create_configuration ? 1 : 0
+
+  byte_length = 8
+}
+
 resource "aws_msk_configuration" "this" {
   count = var.create && var.create_configuration ? 1 : 0
 
-  name              = coalesce(var.configuration_name, var.name)
+  name              = format("%s-%s", coalesce(var.configuration_name, var.name), random_id.this[0].dec)
   description       = var.configuration_description
   kafka_versions    = [var.kafka_version]
   server_properties = join("\n", [for k, v in var.configuration_server_properties : format("%s = %s", k, v)])
+
+  lifecycle {
+    create_before_destroy = true
+  }
 }
 
 ################################################################################

versions.tf

@@ -6,5 +6,9 @@ terraform {
       source  = "hashicorp/aws"
       version = ">= 5.21"
     }
+    random = {
+      source  = "hashicorp/random"
+      version = ">= 3.6"
+    }
   }
 }