Adding ignore_missing_component_templates

CHANGELOG.md

@@ -4,6 +4,7 @@
 - Add `elasticstack_elasticsearch_ingest_processor_reroute` data source ([#678](https://github.com/elastic/terraform-provider-elasticstack/issues/678))
 - Add support for `supports_agentless` to `elasticstack_fleet_agent_policy` ([#1197](https://github.com/elastic/terraform-provider-elasticstack/pull/1197))
 - Ignore `master_timeout` when targeting Serverless projects ([#1207](https://github.com/elastic/terraform-provider-elasticstack/pull/1207))
+- Add `ignore_missing_component_templates` to `elasticstack_elasticsearch_index_template` ([#1206](https://github.com/elastic/terraform-provider-elasticstack/pull/1206))
 
 ## [0.11.16] - 2025-07-09
 

docs/data-sources/elasticsearch_index_template.md

@@ -42,6 +42,7 @@ output "template" {
 - `composed_of` (List of String) An ordered list of component template names.
 - `data_stream` (List of Object) If this object is included, the template is used to create data streams and their backing indices. Supports an empty object. (see [below for nested schema](#nestedatt--data_stream))
 - `id` (String) Internal identifier of the resource
+- `ignore_missing_component_templates` (List of String) A list of component template names that are ignored if missing.
 - `index_patterns` (Set of String) Array of wildcard (*) expressions used to match the names of data streams and indices during creation.
 - `metadata` (String) Optional user metadata about the index template.
 - `priority` (Number) Priority to determine index template precedence when a new data stream or index is created.

docs/resources/elasticsearch_index_template.md

@@ -58,6 +58,7 @@ resource "elasticstack_elasticsearch_index_template" "my_data_stream" {
 - `composed_of` (List of String) An ordered list of component template names.
 - `data_stream` (Block List, Max: 1) If this object is included, the template is used to create data streams and their backing indices. Supports an empty object. (see [below for nested schema](#nestedblock--data_stream))
 - `elasticsearch_connection` (Block List, Max: 1, Deprecated) Elasticsearch connection configuration block. This property will be removed in a future provider version. Configure the Elasticsearch connection via the provider configuration instead. (see [below for nested schema](#nestedblock--elasticsearch_connection))
+- `ignore_missing_component_templates` (List of String) A list of component template names that are ignored if missing.
 - `metadata` (String) Optional user metadata about the index template.
 - `priority` (Number) Priority to determine index template precedence when a new data stream or index is created.
 - `template` (Block List, Max: 1) Template to be applied. It may optionally include an aliases, mappings, lifecycle, or settings configuration. (see [below for nested schema](#nestedblock--template))

internal/elasticsearch/index/template.go

@@ -38,6 +38,15 @@ func ResourceTemplate() *schema.Resource {
 				Type: schema.TypeString,
 			},
 		},
+		"ignore_missing_component_templates": {
+			Description: "A list of component template names that are ignored if missing.",
+			Type:        schema.TypeList,
+			Optional:    true,
+			Computed:    true,
+			Elem: &schema.Schema{
+				Type: schema.TypeString,
+			},
+		},
 		"data_stream": {
 			Description: "If this object is included, the template is used to create data streams and their backing indices. Supports an empty object.",
 			Type:        schema.TypeList,
@@ -221,6 +230,14 @@ func resourceIndexTemplatePut(ctx context.Context, d *schema.ResourceData, meta
 	}
 	indexTemplate.ComposedOf = compsOf
 
+	compsOfIgnore := make([]string, 0)
+	if v, ok := d.GetOk("ignore_missing_component_templates"); ok {
+		for _, c := range v.([]interface{}) {
+			compsOfIgnore = append(compsOfIgnore, c.(string))
+		}
+	}
+	indexTemplate.IgnoreMissingComponentTemplates = compsOfIgnore
+
 	if v, ok := d.GetOk("data_stream"); ok {
 		// 8.x workaround
 		hasAllowCustomRouting := false
@@ -371,6 +388,9 @@ func resourceIndexTemplateRead(ctx context.Context, d *schema.ResourceData, meta
 	if err := d.Set("composed_of", tpl.IndexTemplate.ComposedOf); err != nil {
 		return diag.FromErr(err)
 	}
+	if err := d.Set("ignore_missing_component_templates", tpl.IndexTemplate.IgnoreMissingComponentTemplates); err != nil {
+		return diag.FromErr(err)
+	}
 	if stream := tpl.IndexTemplate.DataStream; stream != nil {
 		ds := make([]interface{}, 1)
 		dSettings := make(map[string]interface{})

internal/elasticsearch/index/template_data_source.go

@@ -29,6 +29,14 @@ func DataSourceTemplate() *schema.Resource {
 				Type: schema.TypeString,
 			},
 		},
+		"ignore_missing_component_templates": {
+			Description: "A list of component template names that are ignored if missing.",
+			Type:        schema.TypeList,
+			Computed:    true,
+			Elem: &schema.Schema{
+				Type: schema.TypeString,
+			},
+		},
 		"data_stream": {
 			Description: "If this object is included, the template is used to create data streams and their backing indices. Supports an empty object.",
 			Type:        schema.TypeList,

internal/elasticsearch/index/template_data_source_test.go

@@ -22,6 +22,8 @@ func TestAccIndexTemplateDataSource(t *testing.T) {
 				Check: resource.ComposeAggregateTestCheckFunc(
 					resource.TestCheckResourceAttr("data.elasticstack_elasticsearch_index_template.test", "name", templateName),
 					resource.TestCheckTypeSetElemAttr("data.elasticstack_elasticsearch_index_template.test", "index_patterns.*", fmt.Sprintf("tf-acc-%s-*", templateName)),
+					resource.TestCheckTypeSetElemAttr("data.elasticstack_elasticsearch_index_template.test", "composed_of.*", fmt.Sprintf("%s-logs@custom", templateName)),
+					resource.TestCheckTypeSetElemAttr("data.elasticstack_elasticsearch_index_template.test", "ignore_missing_component_templates.*", fmt.Sprintf("%s-logs@custom", templateName)),
 					resource.TestCheckResourceAttr("data.elasticstack_elasticsearch_index_template.test", "priority", "100"),
 				),
 			},
@@ -40,10 +42,13 @@ resource "elasticstack_elasticsearch_index_template" "test" {
 
 	priority       = 100
 	index_patterns = ["tf-acc-%s-*"]
+
+	composed_of = ["%s-logs@custom"]
+	ignore_missing_component_templates = ["%s-logs@custom"]
 }
 
 data "elasticstack_elasticsearch_index_template" "test" {
 	name = elasticstack_elasticsearch_index_template.test.name
 }
-	`, templateName, templateName)
+	`, templateName, templateName, templateName, templateName)
 }

internal/elasticsearch/index/template_test.go

@@ -25,6 +25,8 @@ func TestAccResourceIndexTemplate(t *testing.T) {
 				Check: resource.ComposeTestCheckFunc(
 					resource.TestCheckResourceAttr("elasticstack_elasticsearch_index_template.test", "name", templateName),
 					resource.TestCheckTypeSetElemAttr("elasticstack_elasticsearch_index_template.test", "index_patterns.*", fmt.Sprintf("%s-logs-*", templateName)),
+					resource.TestCheckTypeSetElemAttr("elasticstack_elasticsearch_index_template.test", "composed_of.*", fmt.Sprintf("%s-logs@custom", templateName)),
+					resource.TestCheckTypeSetElemAttr("elasticstack_elasticsearch_index_template.test", "ignore_missing_component_templates.*", fmt.Sprintf("%s-logs@custom", templateName)),
 					resource.TestCheckResourceAttr("elasticstack_elasticsearch_index_template.test", "priority", "42"),
 					resource.TestCheckResourceAttr("elasticstack_elasticsearch_index_template.test", "template.0.alias.#", "1"),
 					resource.TestCheckResourceAttr("elasticstack_elasticsearch_index_template.test2", "name", fmt.Sprintf("%s-stream", templateName)),
@@ -36,6 +38,8 @@ func TestAccResourceIndexTemplate(t *testing.T) {
 				Check: resource.ComposeTestCheckFunc(
 					resource.TestCheckResourceAttr("elasticstack_elasticsearch_index_template.test", "name", templateName),
 					resource.TestCheckTypeSetElemAttr("elasticstack_elasticsearch_index_template.test", "index_patterns.*", fmt.Sprintf("%s-logs-*", templateName)),
+					resource.TestCheckTypeSetElemAttr("elasticstack_elasticsearch_index_template.test", "composed_of.*", fmt.Sprintf("%s-logs-updated@custom", templateName)),
+					resource.TestCheckTypeSetElemAttr("elasticstack_elasticsearch_index_template.test", "ignore_missing_component_templates.*", fmt.Sprintf("%s-logs-updated@custom", templateName)),
 					resource.TestCheckResourceAttr("elasticstack_elasticsearch_index_template.test", "template.0.alias.#", "2"),
 					resource.TestCheckResourceAttr("elasticstack_elasticsearch_index_template.test2", "name", fmt.Sprintf("%s-stream", templateName)),
 					resource.TestCheckResourceAttr("elasticstack_elasticsearch_index_template.test2", "data_stream.0.hidden", "false"),
@@ -57,6 +61,9 @@ resource "elasticstack_elasticsearch_index_template" "test" {
   priority       = 42
   index_patterns = ["%s-logs-*"]
 
+  composed_of = ["%s-logs@custom"]
+  ignore_missing_component_templates = ["%s-logs@custom"]
+
   template {
     alias {
       name = "my_template_test"
@@ -76,7 +83,7 @@ resource "elasticstack_elasticsearch_index_template" "test2" {
     hidden = true
   }
 }
-	`, name, name, name)
+	`, name, name, name, name, name)
 }
 
 func testAccResourceIndexTemplateUpdate(name string) string {
@@ -90,6 +97,9 @@ resource "elasticstack_elasticsearch_index_template" "test" {
 
   index_patterns = ["%s-logs-*"]
 
+  composed_of = ["%s-logs-updated@custom"]
+  ignore_missing_component_templates = ["%s-logs-updated@custom"]
+
   template {
     alias {
       name = "my_template_test"
@@ -114,7 +124,7 @@ resource "elasticstack_elasticsearch_index_template" "test2" {
 
   template {}
 }
-	`, name, name, name)
+	`, name, name, name, name, name)
 }
 
 func checkResourceIndexTemplateDestroy(s *terraform.State) error {

internal/models/models.go

@@ -163,16 +163,17 @@ type Application struct {
 }
 
 type IndexTemplate struct {
-	Name          string                 `json:"-"`
-	Create        bool                   `json:"-"`
-	Timeout       string                 `json:"-"`
-	ComposedOf    []string               `json:"composed_of"`
-	DataStream    *DataStreamSettings    `json:"data_stream,omitempty"`
-	IndexPatterns []string               `json:"index_patterns"`
-	Meta          map[string]interface{} `json:"_meta,omitempty"`
-	Priority      *int                   `json:"priority,omitempty"`
-	Template      *Template              `json:"template,omitempty"`
-	Version       *int                   `json:"version,omitempty"`
+	Name                            string                 `json:"-"`
+	Create                          bool                   `json:"-"`
+	Timeout                         string                 `json:"-"`
+	ComposedOf                      []string               `json:"composed_of"`
+	IgnoreMissingComponentTemplates []string               `json:"ignore_missing_component_templates"`
+	DataStream                      *DataStreamSettings    `json:"data_stream,omitempty"`
+	IndexPatterns                   []string               `json:"index_patterns"`
+	Meta                            map[string]interface{} `json:"_meta,omitempty"`
+	Priority                        *int                   `json:"priority,omitempty"`
+	Template                        *Template              `json:"template,omitempty"`
+	Version                         *int                   `json:"version,omitempty"`
 }
 
 type DataStreamSettings struct {