Elasticsearch: Deprecate index setting for annotation queries (#67046)

* Elasticsearch: Deprecate index setting for annotation queries

* Update comment

public/app/plugins/datasource/elasticsearch/datasource.ts

@@ -52,7 +52,7 @@ import {
 } from './components/QueryEditor/MetricAggregationsEditor/aggregations';
 import { metricAggregationConfig } from './components/QueryEditor/MetricAggregationsEditor/utils';
 import { defaultBucketAgg, hasMetricOfType } from './queryDef';
-import { trackQuery } from './tracking';
+import { trackAnnotationQuery, trackQuery } from './tracking';
 import {
   Logs,
   BucketAggregation,
@@ -321,7 +321,8 @@ export class ElasticDatasource
       ignore_unavailable: true,
     };
 
-    // old elastic annotations had index specified on them
+    // @deprecated
+    // Field annotation.index is deprecated and will be removed in the future
     if (annotation.index) {
       header.index = annotation.index;
     } else {
@@ -330,6 +331,7 @@ export class ElasticDatasource
 
     const payload = JSON.stringify(header) + '\n' + JSON.stringify(data) + '\n';
 
+    trackAnnotationQuery(annotation);
     return lastValueFrom(
       this.post('_msearch', payload).pipe(
         map((res) => {

public/app/plugins/datasource/elasticsearch/tracking.ts

@@ -140,3 +140,25 @@ export function trackQuery(
     });
   }
 }
+
+export function trackAnnotationQuery(annotation: {
+  target: ElasticsearchQuery;
+  timeField?: string;
+  timeEndField?: string;
+  query?: string;
+  tagsField?: string;
+  textField?: string;
+  index?: string;
+  [key: string]: unknown;
+}): void {
+  reportInteraction('grafana_elasticsearch_annotation_query_executed', {
+    grafana_version: config.buildInfo.version,
+    has_target_query: !!annotation.target?.query,
+    has_query: !!annotation.query,
+    has_time_field: !!annotation.timeField,
+    has_time_end_field: !!annotation.timeEndField,
+    has_tags_field: !!annotation.tagsField,
+    has_text_field: !!annotation.textField,
+    has_index: !!annotation.index,
+  });
+}