Elasticsearch: Remove browser access mode (#49014)

* elastic: remove browser-access-mode

* improved text

Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>

* improved text

Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>

* better text

Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>

* better text

Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>

* better text

Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>

* prettier fixes

Co-authored-by: brendamuir <100768211+brendamuir@users.noreply.github.com>

docs/sources/datasources/elasticsearch.md

@@ -26,31 +26,11 @@ Supported Elasticsearch versions:
 > **Note:** If you're not seeing the `Data Sources` link in your side menu it means that your current user does not have the `Admin` role for the current organization.
 
 | Name      | Description                                                                       |
-| --------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
-| `Name`    | The data source name. This is how you refer to the data source in panels and queries.                                                                                                                                          |
-| `Default` | Default data source means that it will be pre-selected for new panels.                                                                                                                                                         |
+| --------- | --------------------------------------------------------------------------------- |
+| `Name`    | Data source name. This is how you refer to the data source in panels and queries. |
+| `Default` | Data source is pre-selected for new panels.                                       |
 | `Url`     | The HTTP protocol, IP, and port of your Elasticsearch server.                     |
-| `Access`  | Server (default) = URL needs to be accessible from the Grafana backend/server, Browser = URL needs to be accessible from the browser. **Note**: Browser (direct) access is deprecated and will be removed in a future release. |
-
-Access mode controls how requests to the data source will be handled. Server should be the preferred way if nothing else stated.
-
-### Server access mode (Default)
-
-All requests will be made from the browser to Grafana backend/server which in turn will forward the requests to the data source and by that circumvent possible Cross-Origin Resource Sharing (CORS) requirements. The URL needs to be accessible from the grafana backend/server if you select this access mode.
-
-### Browser (Direct) access
-
-> **Warning:** Browser (Direct) access is deprecated and will be removed in a future release.
-
-All requests will be made from the browser directly to the data source and may be subject to Cross-Origin Resource Sharing (CORS) requirements. The URL needs to be accessible from the browser if you select this access mode.
-
-If you select Browser access you must update your Elasticsearch configuration to allow other domains to access
-Elasticsearch from the browser. You do this by specifying these two options in your **elasticsearch.yml** config file.
-
-```bash
-http.cors.enabled: true
-http.cors.allow-origin: "*"
-```
+| `Access`  | Do not use Access. Use "Server (default)" or the datasource won't function.       |
 
 ### Index settings
 

public/app/plugins/datasource/elasticsearch/configuration/ConfigEditor.tsx

@@ -32,8 +32,8 @@ export const ConfigEditor = (props: Props) => {
   return (
     <>
       {options.access === 'direct' && (
-        <Alert title="Deprecation Notice" severity="warning">
-          Browser access mode in the Elasticsearch datasource is deprecated and will be removed in a future release.
+        <Alert title="Error" severity="error">
+          Browser access mode in the Elasticsearch datasource is no longer available. Switch to server access mode.
         </Alert>
       )}
       {!supportedVersion && (

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

@@ -88,6 +88,7 @@ export class ElasticDatasource
   dataLinks: DataLinkConfig[];
   languageProvider: LanguageProvider;
   includeFrozen: boolean;
+  isProxyAccess: boolean;
 
   constructor(
     instanceSettings: DataSourceInstanceSettings<ElasticsearchOptions>,
@@ -99,6 +100,7 @@ export class ElasticDatasource
     this.url = instanceSettings.url!;
     this.name = instanceSettings.name;
     this.index = instanceSettings.database ?? '';
+    this.isProxyAccess = instanceSettings.access === 'proxy';
     const settingsData = instanceSettings.jsonData || ({} as ElasticsearchOptions);
 
     this.timeField = settingsData.timeField;
@@ -132,6 +134,13 @@ export class ElasticDatasource
     data?: undefined,
     headers?: BackendSrvRequest['headers']
   ): Observable<any> {
+    if (!this.isProxyAccess) {
+      const error = new Error(
+        'Browser access mode in the Elasticsearch datasource is no longer available. Switch to server access mode.'
+      );
+      return throwError(() => error);
+    }
+
     if (!isSupportedVersion(this.esVersion)) {
       const error = new Error(
         'Support for Elasticsearch versions after their end-of-life (currently versions < 7.10) was removed.'