feat: support composable index templates (#55)

Author: amontalban

README.md

@@ -94,6 +94,7 @@ Here is a working example of using this Terraform module:
 | [aws_elasticsearch_domain_saml_options.opensearch](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/elasticsearch_domain_saml_options) | resource |
 | [aws_iam_service_linked_role.es](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_service_linked_role) | resource |
 | [aws_route53_record.opensearch](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route53_record) | resource |
+| [elasticsearch_composable_index_template.composable_index_template](https://registry.terraform.io/providers/phillbaker/elasticsearch/latest/docs/resources/composable_index_template) | resource |
 | [elasticsearch_index.index](https://registry.terraform.io/providers/phillbaker/elasticsearch/latest/docs/resources/index) | resource |
 | [elasticsearch_index_template.index_template](https://registry.terraform.io/providers/phillbaker/elasticsearch/latest/docs/resources/index_template) | resource |
 | [elasticsearch_opensearch_ism_policy.ism_policy](https://registry.terraform.io/providers/phillbaker/elasticsearch/latest/docs/resources/opensearch_ism_policy) | resource |
@@ -126,6 +127,8 @@ Here is a working example of using this Terraform module:
 | <a name="input_cluster_version"></a> [cluster\_version](#input\_cluster\_version) | The version of OpenSearch to deploy. | `string` | `"1.0"` | no |
 | <a name="input_cognito_options"></a> [cognito\_options](#input\_cognito\_options) | Configuration block for authenticating Kibana with Cognito. | `map(string)` | `{}` | no |
 | <a name="input_cognito_options_enabled"></a> [cognito\_options\_enabled](#input\_cognito\_options\_enabled) | Whether Amazon Cognito authentication with Kibana is enabled or not. | `bool` | `false` | no |
+| <a name="input_composable_index_template_files"></a> [composable\_index\_template\_files](#input\_composable\_index\_template\_files) | A set of all composable index template files to create. | `set(string)` | `[]` | no |
+| <a name="input_composable_index_templates"></a> [composable\_index\_templates](#input\_composable\_index\_templates) | A map of all composable index templates to create. | `map(any)` | `{}` | no |
 | <a name="input_create_service_role"></a> [create\_service\_role](#input\_create\_service\_role) | Indicates whether to create the service-linked role. See https://docs.aws.amazon.com/opensearch-service/latest/developerguide/slr.html | `bool` | `true` | no |
 | <a name="input_custom_endpoint"></a> [custom\_endpoint](#input\_custom\_endpoint) | Fully qualified domain for your custom endpoint. If not specified, then it defaults to <cluster\_name>.<cluster\_domain> | `string` | `null` | no |
 | <a name="input_custom_endpoint_certificate_arn"></a> [custom\_endpoint\_certificate\_arn](#input\_custom\_endpoint\_certificate\_arn) | The ARN of the custom ACM certificate. | `string` | `""` | no |

composable_index_template.tf

@@ -0,0 +1,11 @@
+resource "elasticsearch_composable_index_template" "composable_index_template" {
+  for_each = local.composable_index_templates
+
+  name = each.key
+  body = jsonencode(each.value)
+
+  depends_on = [
+    elasticsearch_opensearch_roles_mapping.master_user_arn,
+    aws_route53_record.opensearch
+  ]
+}

locals.tf

@@ -1,4 +1,10 @@
 locals {
+  composable_index_templates = merge({
+    for filename in var.composable_index_template_files :
+    replace(basename(filename), "/\\.(ya?ml|json)$/", "") =>
+    length(regexall("\\.ya?ml$", filename)) > 0 ? yamldecode(file(filename)) : jsondecode(file(filename))
+  }, var.composable_index_templates)
+
   indices = merge({
     for filename in var.index_files :
     replace(basename(filename), "/\\.(ya?ml|json)$/", "") =>

variables.tf

@@ -199,6 +199,18 @@ variable "saml_master_user_name" {
   default     = null
 }
 
+variable "composable_index_templates" {
+  description = "A map of all composable index templates to create."
+  type        = map(any)
+  default     = {}
+}
+
+variable "composable_index_template_files" {
+  description = "A set of all composable index template files to create."
+  type        = set(string)
+  default     = []
+}
+
 variable "index_templates" {
   description = "A map of all index templates to create."
   type        = map(any)