[8.16] [APM] Remove observability:searchExcludedDataTiers from server…

…less (elastic#196380) (elastic#196636)

# Backport

This will backport the following commits from `main` to `8.16`:
- [[APM] Remove observability:searchExcludedDataTiers from serverless
(elastic#196380)](elastic#196380)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Carlos
Crespo","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-10-17T08:00:57Z","message":"[APM]
Remove observability:searchExcludedDataTiers from serverless
(elastic#196380)\n\nfixes
[elastic#196378](https://github.com/elastic/kibana/issues/196378)\r\n\r\n##
Summary\r\n\r\n\"Excluded data tiers from search\" removed from
serverless.\r\n\r\n<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/7d93dc20-936c-459f-bc21-3da6ea6f30fd\">\r\n\r\nStill
present in stateful\r\n\r\n<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/aed6efb2-8eb3-44a1-aa64-17433d1ce94c\">\r\n\r\n\r\n**Bonus:**\r\n\r\nRemoved
the `_tier` filter noise, when the config was not set\r\n\r\n| Before |
After |\r\n| -------| ----- |\r\n|<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/b66aa65c-db5a-4879-a7ea-df675ae6790a\">|<img\r\nwidth=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/a4ff722d-e311-4d0e-8b7d-660a9d456b71\">|\r\n\r\nCo-authored-by:
Elastic Machine
<[email protected]>","sha":"bad11abb0754fab17626eecc1c5fee183b880dd2","branchLabelMapping":{"^v9.0.0$":"main","^v8.17.0$":"8.x","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","v9.0.0","backport:prev-major","ci:project-deploy-observability","Team:obs-ux-infra_services"],"title":"[APM]
Remove observability:searchExcludedDataTiers from
serverless","number":196380,"url":"https://github.com/elastic/kibana/pull/196380","mergeCommit":{"message":"[APM]
Remove observability:searchExcludedDataTiers from serverless
(elastic#196380)\n\nfixes
[elastic#196378](https://github.com/elastic/kibana/issues/196378)\r\n\r\n##
Summary\r\n\r\n\"Excluded data tiers from search\" removed from
serverless.\r\n\r\n<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/7d93dc20-936c-459f-bc21-3da6ea6f30fd\">\r\n\r\nStill
present in stateful\r\n\r\n<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/aed6efb2-8eb3-44a1-aa64-17433d1ce94c\">\r\n\r\n\r\n**Bonus:**\r\n\r\nRemoved
the `_tier` filter noise, when the config was not set\r\n\r\n| Before |
After |\r\n| -------| ----- |\r\n|<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/b66aa65c-db5a-4879-a7ea-df675ae6790a\">|<img\r\nwidth=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/a4ff722d-e311-4d0e-8b7d-660a9d456b71\">|\r\n\r\nCo-authored-by:
Elastic Machine
<[email protected]>","sha":"bad11abb0754fab17626eecc1c5fee183b880dd2"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v9.0.0","branchLabelMappingKey":"^v9.0.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/196380","number":196380,"mergeCommit":{"message":"[APM]
Remove observability:searchExcludedDataTiers from serverless
(elastic#196380)\n\nfixes
[elastic#196378](https://github.com/elastic/kibana/issues/196378)\r\n\r\n##
Summary\r\n\r\n\"Excluded data tiers from search\" removed from
serverless.\r\n\r\n<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/7d93dc20-936c-459f-bc21-3da6ea6f30fd\">\r\n\r\nStill
present in stateful\r\n\r\n<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/aed6efb2-8eb3-44a1-aa64-17433d1ce94c\">\r\n\r\n\r\n**Bonus:**\r\n\r\nRemoved
the `_tier` filter noise, when the config was not set\r\n\r\n| Before |
After |\r\n| -------| ----- |\r\n|<img width=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/b66aa65c-db5a-4879-a7ea-df675ae6790a\">|<img\r\nwidth=\"600\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/a4ff722d-e311-4d0e-8b7d-660a9d456b71\">|\r\n\r\nCo-authored-by:
Elastic Machine
<[email protected]>","sha":"bad11abb0754fab17626eecc1c5fee183b880dd2"}}]}]
BACKPORT-->

Co-authored-by: Carlos Crespo <[email protected]>

packages/serverless/settings/observability_project/index.ts

@@ -37,5 +37,4 @@ export const OBSERVABILITY_PROJECT_SETTINGS = [
   settings.OBSERVABILITY_AI_ASSISTANT_SIMULATED_FUNCTION_CALLING,
   settings.OBSERVABILITY_AI_ASSISTANT_SEARCH_CONNECTOR_INDEX_PATTERN,
   settings.OBSERVABILITY_LOGS_DATA_ACCESS_LOG_SOURCES_ID,
-  settings.OBSERVABILITY_SEARCH_EXCLUDED_DATA_TIERS,
 ];

x-pack/plugins/observability_solution/apm_data_access/server/lib/helpers/create_es_client/create_apm_event_client/index.ts

@@ -103,7 +103,7 @@ export class APMEventClient {
   /** @deprecated Use {@link excludedDataTiers} instead.
    * See https://www.elastic.co/guide/en/kibana/current/advanced-options.html **/
   private readonly includeFrozen: boolean;
-  private readonly excludedDataTiers?: DataTier[];
+  private readonly excludedDataTiers: DataTier[];
   private readonly inspectableEsQueriesMap?: WeakMap<KibanaRequest, InspectResponse>;
 
   constructor(config: APMEventClientConfig) {
@@ -112,7 +112,7 @@ export class APMEventClient {
     this.request = config.request;
     this.indices = config.indices;
     this.includeFrozen = config.options.includeFrozen;
-    this.excludedDataTiers = config.options.excludedDataTiers;
+    this.excludedDataTiers = config.options.excludedDataTiers ?? [];
     this.inspectableEsQueriesMap = config.options.inspectableEsQueriesMap;
   }
 
@@ -167,7 +167,7 @@ export class APMEventClient {
       indices: this.indices,
     });
 
-    if (this.excludedDataTiers) {
+    if (this.excludedDataTiers.length > 0) {
       filters.push(...excludeTiersQuery(this.excludedDataTiers));
     }
 
@@ -207,7 +207,8 @@ export class APMEventClient {
     // Reusing indices configured for errors since both events and errors are stored as logs.
     const index = processorEventsToIndex([ProcessorEvent.error], this.indices);
 
-    const filter = this.excludedDataTiers ? excludeTiersQuery(this.excludedDataTiers) : undefined;
+    const filter =
+      this.excludedDataTiers.length > 0 ? excludeTiersQuery(this.excludedDataTiers) : undefined;
 
     const searchParams = {
       ...omit(params, 'body'),
@@ -249,7 +250,7 @@ export class APMEventClient {
           indices: this.indices,
         });
 
-        if (this.excludedDataTiers) {
+        if (this.excludedDataTiers.length > 0) {
           filters.push(...excludeTiersQuery(this.excludedDataTiers));
         }
 

x-pack/plugins/observability_solution/apm_data_access/server/lib/helpers/tier_filter.ts

@@ -13,10 +13,10 @@ export function getDataTierFilterCombined({
   excludedDataTiers,
 }: {
   filter?: QueryDslQueryContainer;
-  excludedDataTiers?: DataTier[];
+  excludedDataTiers: DataTier[];
 }): QueryDslQueryContainer | undefined {
   if (!filter) {
-    return excludedDataTiers ? excludeTiersQuery(excludedDataTiers)[0] : undefined;
+    return excludedDataTiers.length > 0 ? excludeTiersQuery(excludedDataTiers)[0] : undefined;
   }
 
   return !excludedDataTiers