move Metrics API to start (#69787)

* move metrics to start

* update plugins accordingly

* update docs

* update legacy code

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: mshustov

docs/development/core/server/kibana-plugin-core-server.coresetup.md

@@ -22,7 +22,6 @@ export interface CoreSetup<TPluginsStart extends object = object, TStart = unkno
 |  [getStartServices](./kibana-plugin-core-server.coresetup.getstartservices.md) | <code>StartServicesAccessor&lt;TPluginsStart, TStart&gt;</code> | [StartServicesAccessor](./kibana-plugin-core-server.startservicesaccessor.md) |
 |  [http](./kibana-plugin-core-server.coresetup.http.md) | <code>HttpServiceSetup &amp; {</code><br/><code>        resources: HttpResources;</code><br/><code>    }</code> | [HttpServiceSetup](./kibana-plugin-core-server.httpservicesetup.md) |
 |  [logging](./kibana-plugin-core-server.coresetup.logging.md) | <code>LoggingServiceSetup</code> | [LoggingServiceSetup](./kibana-plugin-core-server.loggingservicesetup.md) |
-|  [metrics](./kibana-plugin-core-server.coresetup.metrics.md) | <code>MetricsServiceSetup</code> | [MetricsServiceSetup](./kibana-plugin-core-server.metricsservicesetup.md) |
 |  [savedObjects](./kibana-plugin-core-server.coresetup.savedobjects.md) | <code>SavedObjectsServiceSetup</code> | [SavedObjectsServiceSetup](./kibana-plugin-core-server.savedobjectsservicesetup.md) |
 |  [status](./kibana-plugin-core-server.coresetup.status.md) | <code>StatusServiceSetup</code> | [StatusServiceSetup](./kibana-plugin-core-server.statusservicesetup.md) |
 |  [uiSettings](./kibana-plugin-core-server.coresetup.uisettings.md) | <code>UiSettingsServiceSetup</code> | [UiSettingsServiceSetup](./kibana-plugin-core-server.uisettingsservicesetup.md) |

docs/development/core/server/kibana-plugin-core-server.coresetup.metrics.md

@@ -19,6 +19,7 @@ export interface CoreStart
 |  [capabilities](./kibana-plugin-core-server.corestart.capabilities.md) | <code>CapabilitiesStart</code> | [CapabilitiesStart](./kibana-plugin-core-server.capabilitiesstart.md) |
 |  [elasticsearch](./kibana-plugin-core-server.corestart.elasticsearch.md) | <code>ElasticsearchServiceStart</code> | [ElasticsearchServiceStart](./kibana-plugin-core-server.elasticsearchservicestart.md) |
 |  [http](./kibana-plugin-core-server.corestart.http.md) | <code>HttpServiceStart</code> | [HttpServiceStart](./kibana-plugin-core-server.httpservicestart.md) |
+|  [metrics](./kibana-plugin-core-server.corestart.metrics.md) | <code>MetricsServiceStart</code> |  |
 |  [savedObjects](./kibana-plugin-core-server.corestart.savedobjects.md) | <code>SavedObjectsServiceStart</code> | [SavedObjectsServiceStart](./kibana-plugin-core-server.savedobjectsservicestart.md) |
 |  [uiSettings](./kibana-plugin-core-server.corestart.uisettings.md) | <code>UiSettingsServiceStart</code> | [UiSettingsServiceStart](./kibana-plugin-core-server.uisettingsservicestart.md) |
 

docs/development/core/server/kibana-plugin-core-server.corestart.md

@@ -0,0 +1,12 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [CoreStart](./kibana-plugin-core-server.corestart.md) &gt; [metrics](./kibana-plugin-core-server.corestart.metrics.md)
+
+## CoreStart.metrics property
+
+
+<b>Signature:</b>
+
+```typescript
+metrics: MetricsServiceStart;
+```

docs/development/core/server/kibana-plugin-core-server.corestart.metrics.md

@@ -112,7 +112,7 @@ The plugin integrates with the core system via lifecycle events: `setup`<!-- -->
 |  [LoggerFactory](./kibana-plugin-core-server.loggerfactory.md) | The single purpose of <code>LoggerFactory</code> interface is to define a way to retrieve a context-based logger instance. |
 |  [LoggingServiceSetup](./kibana-plugin-core-server.loggingservicesetup.md) | Provides APIs to plugins for customizing the plugin's logger. |
 |  [LogMeta](./kibana-plugin-core-server.logmeta.md) | Contextual metadata |
-|  [MetricsServiceSetup](./kibana-plugin-core-server.metricsservicesetup.md) | APIs to retrieves metrics gathered and exposed by the core platform. |
+|  [MetricsServiceSetup](./kibana-plugin-core-server.metricsservicesetup.md) |  |
 |  [NodesVersionCompatibility](./kibana-plugin-core-server.nodesversioncompatibility.md) |  |
 |  [OnPostAuthToolkit](./kibana-plugin-core-server.onpostauthtoolkit.md) | A tool set defining an outcome of OnPostAuth interceptor for incoming request. |
 |  [OnPreAuthToolkit](./kibana-plugin-core-server.onpreauthtoolkit.md) | A tool set defining an outcome of OnPreAuth interceptor for incoming request. |

docs/development/core/server/kibana-plugin-core-server.md

@@ -4,17 +4,8 @@
 
 ## MetricsServiceSetup interface
 
-APIs to retrieves metrics gathered and exposed by the core platform.
-
 <b>Signature:</b>
 
 ```typescript
 export interface MetricsServiceSetup 
 ```
-
-## Properties
-
-|  Property | Type | Description |
-|  --- | --- | --- |
-|  [getOpsMetrics$](./kibana-plugin-core-server.metricsservicesetup.getopsmetrics_.md) | <code>() =&gt; Observable&lt;OpsMetrics&gt;</code> | Retrieve an observable emitting the [OpsMetrics](./kibana-plugin-core-server.opsmetrics.md) gathered. The observable will emit an initial value during core's <code>start</code> phase, and a new value every fixed interval of time, based on the <code>opts.interval</code> configuration property. |
-

docs/development/core/server/kibana-plugin-core-server.metricsservicesetup.getopsmetrics_.md

@@ -60,7 +60,7 @@ import {
 } from './saved_objects';
 import { CapabilitiesSetup, CapabilitiesStart } from './capabilities';
 import { UuidServiceSetup } from './uuid';
-import { MetricsServiceSetup } from './metrics';
+import { MetricsServiceStart } from './metrics';
 import { StatusServiceSetup } from './status';
 import {
   LoggingServiceSetup,
@@ -403,8 +403,6 @@ export interface CoreSetup<TPluginsStart extends object = object, TStart = unkno
   };
   /** {@link LoggingServiceSetup} */
   logging: LoggingServiceSetup;
-  /** {@link MetricsServiceSetup} */
-  metrics: MetricsServiceSetup;
   /** {@link SavedObjectsServiceSetup} */
   savedObjects: SavedObjectsServiceSetup;
   /** {@link StatusServiceSetup} */
@@ -442,6 +440,8 @@ export interface CoreStart {
   elasticsearch: ElasticsearchServiceStart;
   /** {@link HttpServiceStart} */
   http: HttpServiceStart;
+  /** {@link MetricsServiceStart} */
+  metrics: MetricsServiceStart;
   /** {@link SavedObjectsServiceStart} */
   savedObjects: SavedObjectsServiceStart;
   /** {@link UiSettingsServiceStart} */

docs/development/core/server/kibana-plugin-core-server.metricsservicesetup.md

@@ -30,7 +30,7 @@ import {
 } from './saved_objects';
 import { InternalUiSettingsServiceSetup, InternalUiSettingsServiceStart } from './ui_settings';
 import { UuidServiceSetup } from './uuid';
-import { InternalMetricsServiceSetup } from './metrics';
+import { InternalMetricsServiceStart } from './metrics';
 import { InternalRenderingServiceSetup } from './rendering';
 import { InternalHttpResourcesSetup } from './http_resources';
 import { InternalStatusServiceSetup } from './status';
@@ -42,7 +42,6 @@ export interface InternalCoreSetup {
   context: ContextSetup;
   http: InternalHttpServiceSetup;
   elasticsearch: InternalElasticsearchServiceSetup;
-  metrics: InternalMetricsServiceSetup;
   savedObjects: InternalSavedObjectsServiceSetup;
   status: InternalStatusServiceSetup;
   uiSettings: InternalUiSettingsServiceSetup;
@@ -59,6 +58,7 @@ export interface InternalCoreStart {
   capabilities: CapabilitiesStart;
   elasticsearch: ElasticsearchServiceStart;
   http: InternalHttpServiceStart;
+  metrics: InternalMetricsServiceStart;
   savedObjects: InternalSavedObjectsServiceStart;
   uiSettings: InternalUiSettingsServiceStart;
 }

src/core/server/index.ts

@@ -47,7 +47,6 @@ import { capabilitiesServiceMock } from '../capabilities/capabilities_service.mo
 import { httpResourcesMock } from '../http_resources/http_resources_service.mock';
 import { setupMock as renderingServiceMock } from '../rendering/__mocks__/rendering_service';
 import { uuidServiceMock } from '../uuid/uuid_service.mock';
-import { metricsServiceMock } from '../metrics/metrics_service.mock';
 import { findLegacyPluginSpecs } from './plugins';
 import { LegacyVars, LegacyServiceSetupDeps, LegacyServiceStartDeps } from './types';
 import { LegacyService } from './legacy_service';
@@ -98,7 +97,6 @@ beforeEach(() => {
         contracts: new Map([['plugin-id', 'plugin-value']]),
       },
       rendering: renderingServiceMock,
-      metrics: metricsServiceMock.createInternalSetupContract(),
       uuid: uuidSetup,
       status: statusServiceMock.createInternalSetupContract(),
       logging: loggingServiceMock.createInternalSetupContract(),