Relax OpenSearch Node Compatibility check

Signed-off-by: Bandini Bhopi <[email protected]>

config/opensearch_dashboards.yml

@@ -268,3 +268,5 @@
 # Set the value of this setting to true to enable plugin augmentation on Dashboard
 # vis_augmenter.pluginAugmentationEnabled: true
 
+# Set the value of this setting to false when don't want to use OpenSearch to store OpenSearch-Dashboards metadata
+#opensearch.asOpensearchDashboardsMetadataStorage: true

src/core/server/opensearch/client/client_config.ts

@@ -53,6 +53,7 @@ export type OpenSearchClientConfig = Pick<
   | 'username'
   | 'password'
   | 'disablePrototypePoisoningProtection'
+  | 'asOpensearchDashboardsMetadataStorage'
 > & {
   memoryCircuitBreaker?:
     | OpenSearchConfig['memoryCircuitBreaker']

src/core/server/opensearch/opensearch_config.ts

@@ -143,6 +143,7 @@ export const configSchema = schema.object({
     schema.boolean({ defaultValue: false })
   ),
   disablePrototypePoisoningProtection: schema.maybe(schema.boolean({ defaultValue: false })),
+  asOpensearchDashboardsMetadataStorage: schema.boolean({ defaultValue: true }),
 });
 
 const deprecations: ConfigDeprecationProvider = ({ renameFromRoot, renameFromRootWithoutMap }) => [
@@ -325,6 +326,11 @@ export class OpenSearchConfig {
    */
   public readonly disablePrototypePoisoningProtection?: boolean;
 
+  /**
+   * Specifies whether the OpenSearch is being used as OpenSearch Dashboards metadata storage.
+   */
+  public readonly asOpensearchDashboardsMetadataStorage?: boolean;
+
   constructor(rawConfig: OpenSearchConfigType) {
     this.ignoreVersionMismatch = rawConfig.ignoreVersionMismatch;
     this.apiVersion = rawConfig.apiVersion;
@@ -346,6 +352,7 @@ export class OpenSearchConfig {
     this.password = rawConfig.password;
     this.customHeaders = rawConfig.customHeaders;
     this.disablePrototypePoisoningProtection = rawConfig.disablePrototypePoisoningProtection;
+    this.asOpensearchDashboardsMetadataStorage = rawConfig.asOpensearchDashboardsMetadataStorage;
 
     const { alwaysPresentCertificate, verificationMode } = rawConfig.ssl;
     const { key, keyPassphrase, certificate, certificateAuthorities } = readKeyAndCerts(rawConfig);

src/core/server/opensearch/opensearch_service.ts

@@ -28,7 +28,7 @@
  * under the License.
  */
 
-import { Observable, Subject } from 'rxjs';
+import { Observable, Subject, of } from 'rxjs';
 import { first, map, shareReplay, takeUntil } from 'rxjs/operators';
 import { merge } from '@osd/std';
 
@@ -91,14 +91,26 @@ export class OpenSearchService
     this.legacyClient = this.createLegacyClusterClient('data', config);
     this.client = this.createClusterClient('data', config);
 
-    const opensearchNodesCompatibility$ = pollOpenSearchNodesVersion({
-      internalClient: this.client.asInternalUser,
-      optimizedHealthcheck: config.optimizedHealthcheck,
-      log: this.log,
-      ignoreVersionMismatch: config.ignoreVersionMismatch,
-      opensearchVersionCheckInterval: config.healthCheckDelay.asMilliseconds(),
-      opensearchDashboardsVersion: this.opensearchDashboardsVersion,
-    }).pipe(takeUntil(this.stop$), shareReplay({ refCount: true, bufferSize: 1 }));
+    let opensearchNodesCompatibility$;
+    const isOpensearchMetadataStorage =
+      config.asOpensearchDashboardsMetadataStorage === undefined ?? true;
+    if (isOpensearchMetadataStorage) {
+      opensearchNodesCompatibility$ = pollOpenSearchNodesVersion({
+        internalClient: this.client.asInternalUser,
+        optimizedHealthcheck: config.optimizedHealthcheck,
+        log: this.log,
+        ignoreVersionMismatch: config.ignoreVersionMismatch,
+        opensearchVersionCheckInterval: config.healthCheckDelay.asMilliseconds(),
+        opensearchDashboardsVersion: this.opensearchDashboardsVersion,
+      }).pipe(takeUntil(this.stop$), shareReplay({ refCount: true, bufferSize: 1 }));
+    } else {
+      opensearchNodesCompatibility$ = of({
+        isCompatible: true,
+        incompatibleNodes: [],
+        warningNodes: [],
+        opensearchDashboardsVersion: this.opensearchDashboardsVersion,
+      });
+    }
 
     this.createLegacyCustomClient = (type, clientConfig = {}) => {
       const finalConfig = merge({}, config, clientConfig);

src/core/server/saved_objects/saved_objects_service.ts

@@ -420,15 +420,6 @@ export class SavedObjectsService
         'Waiting until all OpenSearch nodes are compatible with OpenSearch Dashboards before starting saved objects migrations...'
       );
 
-      // TODO: Move to Status Service https://github.com/elastic/kibana/issues/41983
-      this.setupDeps!.opensearch.opensearchNodesCompatibility$.subscribe(
-        ({ isCompatible, message }) => {
-          if (!isCompatible && message) {
-            this.logger.error(message);
-          }
-        }
-      );
-
       await this.setupDeps!.opensearch.opensearchNodesCompatibility$.pipe(
         filter((nodes) => nodes.isCompatible),
         take(1)