Add elasticstack_kibana_default_data_view resource to manage default data view (#1379)

* Initial plan

* Add kibana_default_data_view resource with CRUD operations

Co-authored-by: tobio <[email protected]>

* Fix ID consistency and generate documentation

Co-authored-by: tobio <[email protected]>

* Add linting fixes, example, and final documentation

Co-authored-by: tobio <[email protected]>

* Make default data view API space aware

* Support removing the default data view

* Changelog

* PR feedback

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: tobio <[email protected]>
Co-authored-by: Toby Brain <[email protected]>

Author: Copilot

CHANGELOG.md

@@ -43,6 +43,7 @@ alias = [
 - Support `.bedrock` and `.gen-ai` connectors ([#1467](https://github.com/elastic/terraform-provider-elasticstack/pull/1467))
 - Support the `solution` attribute in `elasticstack_kibana_space` from 8.16 ([#1486](https://github.com/elastic/terraform-provider-elasticstack/pull/1486)) 
 - Add `elasticstack_elasticsearch_alias` resource ([#1343](https://github.com/elastic/terraform-provider-elasticstack/pull/1343))
+- Add `elasticstack_kibana_default_data_view` resource ([#1379](https://github.com/elastic/terraform-provider-elasticstack/pull/1379))
 
 ## [0.12.2] - 2025-11-19
 - Fix `elasticstack_elasticsearch_snapshot_lifecycle` metadata type conversion causing terraform apply to fail ([#1409](https://github.com/elastic/terraform-provider-elasticstack/issues/1409))

docs/resources/kibana_default_data_view.md

@@ -0,0 +1,49 @@
+---
+# generated by https://github.com/hashicorp/terraform-plugin-docs
+page_title: "elasticstack_kibana_default_data_view Resource - terraform-provider-elasticstack"
+subcategory: "Kibana"
+description: |-
+  Manages the default Kibana data view. See the Kibana Data Views API documentation https://www.elastic.co/docs/api/doc/kibana/v8/operation/operation-setdefaultdatailviewdefault for more information.
+---
+
+# elasticstack_kibana_default_data_view (Resource)
+
+Manages the default Kibana data view. See the [Kibana Data Views API documentation](https://www.elastic.co/docs/api/doc/kibana/v8/operation/operation-setdefaultdatailviewdefault) for more information.
+
+## Example Usage
+
+```terraform
+resource "elasticstack_elasticsearch_index" "my_index" {
+  name                = "my-index-000001"
+  deletion_protection = false
+}
+
+resource "elasticstack_kibana_data_view" "my_data_view" {
+  data_view = {
+    title = "my-index-*"
+    name  = "My Index Data View"
+  }
+
+  depends_on = [elasticstack_elasticsearch_index.my_index]
+}
+
+resource "elasticstack_kibana_default_data_view" "default" {
+  data_view_id = elasticstack_kibana_data_view.my_data_view.data_view.id
+  force        = true
+  skip_delete  = false
+}
+```
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Optional
+
+- `data_view_id` (String) The data view identifier to set as default. NOTE: The API does not validate whether it is a valid identifier. Leave this unset (or explicitly `null`) to unset the default data view.
+- `force` (Boolean) Update an existing default data view identifier. If set to false and a default data view already exists, the operation will fail.
+- `skip_delete` (Boolean) If set to true, the default data view will not be unset when the resource is destroyed. The existing default data view will remain unchanged.
+- `space_id` (String) The Kibana space ID to set the default data view in. Defaults to `default`.
+
+### Read-Only
+
+- `id` (String) Internal identifier of the resource.

examples/resources/elasticstack_kibana_default_data_view/resource.tf

@@ -0,0 +1,19 @@
+resource "elasticstack_elasticsearch_index" "my_index" {
+  name                = "my-index-000001"
+  deletion_protection = false
+}
+
+resource "elasticstack_kibana_data_view" "my_data_view" {
+  data_view = {
+    title = "my-index-*"
+    name  = "My Index Data View"
+  }
+
+  depends_on = [elasticstack_elasticsearch_index.my_index]
+}
+
+resource "elasticstack_kibana_default_data_view" "default" {
+  data_view_id = elasticstack_kibana_data_view.my_data_view.data_view.id
+  force        = true
+  skip_delete  = false
+}