Migrate core's metrics service to packages (#136909)

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

package.json

@@ -213,6 +213,11 @@
     "@kbn/core-logging-server": "link:bazel-bin/packages/core/logging/core-logging-server",
     "@kbn/core-logging-server-internal": "link:bazel-bin/packages/core/logging/core-logging-server-internal",
     "@kbn/core-logging-server-mocks": "link:bazel-bin/packages/core/logging/core-logging-server-mocks",
+    "@kbn/core-metrics-collectors-server-internal": "link:bazel-bin/packages/core/metrics/core-metrics-collectors-server-internal",
+    "@kbn/core-metrics-collectors-server-mocks": "link:bazel-bin/packages/core/metrics/core-metrics-collectors-server-mocks",
+    "@kbn/core-metrics-server": "link:bazel-bin/packages/core/metrics/core-metrics-server",
+    "@kbn/core-metrics-server-internal": "link:bazel-bin/packages/core/metrics/core-metrics-server-internal",
+    "@kbn/core-metrics-server-mocks": "link:bazel-bin/packages/core/metrics/core-metrics-server-mocks",
     "@kbn/core-node-server": "link:bazel-bin/packages/core/node/core-node-server",
     "@kbn/core-node-server-internal": "link:bazel-bin/packages/core/node/core-node-server-internal",
     "@kbn/core-node-server-mocks": "link:bazel-bin/packages/core/node/core-node-server-mocks",
@@ -808,6 +813,11 @@
     "@types/kbn__core-logging-server": "link:bazel-bin/packages/core/logging/core-logging-server/npm_module_types",
     "@types/kbn__core-logging-server-internal": "link:bazel-bin/packages/core/logging/core-logging-server-internal/npm_module_types",
     "@types/kbn__core-logging-server-mocks": "link:bazel-bin/packages/core/logging/core-logging-server-mocks/npm_module_types",
+    "@types/kbn__core-metrics-collectors-server-internal": "link:bazel-bin/packages/core/metrics/core-metrics-collectors-server-internal/npm_module_types",
+    "@types/kbn__core-metrics-collectors-server-mocks": "link:bazel-bin/packages/core/metrics/core-metrics-collectors-server-mocks/npm_module_types",
+    "@types/kbn__core-metrics-server": "link:bazel-bin/packages/core/metrics/core-metrics-server/npm_module_types",
+    "@types/kbn__core-metrics-server-internal": "link:bazel-bin/packages/core/metrics/core-metrics-server-internal/npm_module_types",
+    "@types/kbn__core-metrics-server-mocks": "link:bazel-bin/packages/core/metrics/core-metrics-server-mocks/npm_module_types",
     "@types/kbn__core-node-server": "link:bazel-bin/packages/core/node/core-node-server/npm_module_types",
     "@types/kbn__core-node-server-internal": "link:bazel-bin/packages/core/node/core-node-server-internal/npm_module_types",
     "@types/kbn__core-node-server-mocks": "link:bazel-bin/packages/core/node/core-node-server-mocks/npm_module_types",

packages/BUILD.bazel

@@ -81,6 +81,11 @@ filegroup(
     "//packages/core/logging/core-logging-server-internal:build",
     "//packages/core/logging/core-logging-server-mocks:build",
     "//packages/core/logging/core-logging-server:build",
+    "//packages/core/metrics/core-metrics-collectors-server-internal:build",
+    "//packages/core/metrics/core-metrics-collectors-server-mocks:build",
+    "//packages/core/metrics/core-metrics-server-internal:build",
+    "//packages/core/metrics/core-metrics-server-mocks:build",
+    "//packages/core/metrics/core-metrics-server:build",
     "//packages/core/node/core-node-server-internal:build",
     "//packages/core/node/core-node-server-mocks:build",
     "//packages/core/node/core-node-server:build",
@@ -301,6 +306,11 @@ filegroup(
     "//packages/core/logging/core-logging-server-internal:build_types",
     "//packages/core/logging/core-logging-server-mocks:build_types",
     "//packages/core/logging/core-logging-server:build_types",
+    "//packages/core/metrics/core-metrics-collectors-server-internal:build_types",
+    "//packages/core/metrics/core-metrics-collectors-server-mocks:build_types",
+    "//packages/core/metrics/core-metrics-server-internal:build_types",
+    "//packages/core/metrics/core-metrics-server-mocks:build_types",
+    "//packages/core/metrics/core-metrics-server:build_types",
     "//packages/core/node/core-node-server-internal:build_types",
     "//packages/core/node/core-node-server-mocks:build_types",
     "//packages/core/node/core-node-server:build_types",

packages/core/metrics/core-metrics-collectors-server-internal/BUILD.bazel

@@ -0,0 +1,106 @@
+load("@npm//@bazel/typescript:index.bzl", "ts_config")
+load("@build_bazel_rules_nodejs//:index.bzl", "js_library")
+load("//src/dev/bazel:index.bzl", "jsts_transpiler", "pkg_npm", "pkg_npm_types", "ts_project")
+
+PKG_DIRNAME = "core-metrics-collectors-server-internal"
+PKG_REQUIRE_NAME = "@kbn/core-metrics-collectors-server-internal"
+
+SOURCE_FILES = glob(
+  [
+    "src/**/*.ts",
+  ],
+  exclude = [
+    "**/*.test.*",
+    "**/*.stories.*",
+  ],
+)
+
+SRCS = SOURCE_FILES
+
+filegroup(
+  name = "srcs",
+  srcs = SRCS,
+)
+
+NPM_MODULE_EXTRA_FILES = [
+  "package.json",
+]
+
+RUNTIME_DEPS = [
+  "//packages/kbn-logging",
+  "@npm//moment",
+  "@npm//getos",
+]
+
+TYPES_DEPS = [
+  "@npm//@types/node",
+  "@npm//@types/jest",
+  "@npm//moment",
+  "@npm//@types/getos",
+  "@npm//@hapi/hapi",
+  "@npm//@types/hapi__hapi",
+  "//packages/kbn-logging:npm_module_types",
+  "//packages/core/metrics/core-metrics-server:npm_module_types",
+]
+
+jsts_transpiler(
+  name = "target_node",
+  srcs = SRCS,
+  build_pkg_name = package_name(),
+)
+
+ts_config(
+  name = "tsconfig",
+  src = "tsconfig.json",
+  deps = [
+    "//:tsconfig.base.json",
+    "//:tsconfig.bazel.json",
+  ],
+)
+
+ts_project(
+  name = "tsc_types",
+  args = ['--pretty'],
+  srcs = SRCS,
+  deps = TYPES_DEPS,
+  declaration = True,
+  declaration_map = True,
+  emit_declaration_only = True,
+  out_dir = "target_types",
+  root_dir = "src",
+  tsconfig = ":tsconfig",
+)
+
+js_library(
+  name = PKG_DIRNAME,
+  srcs = NPM_MODULE_EXTRA_FILES,
+  deps = RUNTIME_DEPS + [":target_node"],
+  package_name = PKG_REQUIRE_NAME,
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm(
+  name = "npm_module",
+  deps = [":" + PKG_DIRNAME],
+)
+
+filegroup(
+  name = "build",
+  srcs = [":npm_module"],
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm_types(
+  name = "npm_module_types",
+  srcs = SRCS,
+  deps = [":tsc_types"],
+  package_name = PKG_REQUIRE_NAME,
+  tsconfig = ":tsconfig",
+  visibility = ["//visibility:public"],
+)
+
+filegroup(
+  name = "build_types",
+  srcs = [":npm_module_types"],
+  visibility = ["//visibility:public"],
+)

packages/core/metrics/core-metrics-collectors-server-internal/README.md

@@ -0,0 +1,3 @@
+# @kbn/core-metrics-collectors-server-internal
+
+This package contains the implementation, internal types, unit tests, and internal mocks for Core's server-side metrics service's collectors.

packages/core/metrics/core-metrics-collectors-server-internal/jest.config.js

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test/jest_node',
+  rootDir: '../../../..',
+  roots: ['<rootDir>/packages/core/metrics/core-metrics-collectors-server-internal'],
+};

packages/core/metrics/core-metrics-collectors-server-internal/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@kbn/core-metrics-collectors-server-internal",
+  "private": true,
+  "version": "1.0.0",
+  "main": "./target_node/index.js",
+  "license": "SSPL-1.0 OR Elastic License 2.0"
+}

packages/core/metrics/core-metrics-collectors-server-internal/src/__mocks__/perf_hooks.ts

@@ -6,7 +6,7 @@
  * Side Public License, v 1.
  */
 
-import { mocked } from '../event_loop_delays_monitor.mocks';
+import { mocked } from '../mocks_internal';
 
 export const monitorEventLoopDelay = jest.fn().mockImplementation(() => {
   const mockedHistogram = mocked.createHistogram();

packages/core/metrics/core-metrics-collectors-server-internal/src/cgroup.ts

@@ -8,8 +8,8 @@
 
 import fs from 'fs';
 import { join as joinPath } from 'path';
-import { Logger } from '@kbn/logging';
+import type { Logger } from '@kbn/logging';
-import { MetricsCollector, OpsOsMetrics } from './types';
+import type { MetricsCollector, OpsOsMetrics } from '@kbn/core-metrics-server';
 
 type OsCgroupMetrics = Pick<OpsOsMetrics, 'cpu' | 'cpuacct'>;
 

packages/core/metrics/core-metrics-collectors-server-internal/src/event_loop_delays_monitor.test.ts

@@ -10,7 +10,7 @@
 jest.mock('perf_hooks');
 import { monitorEventLoopDelay } from 'perf_hooks';
 import { EventLoopDelaysMonitor, nsToMs } from './event_loop_delays_monitor';
-import { mocked } from './event_loop_delays_monitor.mocks';
+import { mocked } from './mocks_internal';
 
 describe('EventLoopDelaysMonitor', () => {
   beforeAll(() => {

packages/core/metrics/core-metrics-collectors-server-internal/src/event_loop_delays_monitor.ts

@@ -8,7 +8,7 @@
 
 import type { IntervalHistogram as PerfIntervalHistogram } from 'perf_hooks';
 import { monitorEventLoopDelay } from 'perf_hooks';
-import type { IntervalHistogram } from '../types';
+import type { IntervalHistogram, IEventLoopDelaysMonitor } from '@kbn/core-metrics-server';
 
 /**
  * Nanosecond to milisecond conversion unit
@@ -22,7 +22,7 @@ export function nsToMs(metric: number) {
   return metric / ONE_MILLISECOND_AS_NANOSECONDS;
 }
 
-export class EventLoopDelaysMonitor {
+export class EventLoopDelaysMonitor implements IEventLoopDelaysMonitor {
   private readonly loopMonitor: PerfIntervalHistogram;
   private fromTimestamp: Date;
 

packages/core/metrics/core-metrics-collectors-server-internal/src/index.ts

@@ -6,8 +6,8 @@
  * Side Public License, v 1.
  */
 
-export type { OpsProcessMetrics, OpsOsMetrics, OpsServerMetrics, MetricsCollector } from './types';
 export { OsMetricsCollector } from './os';
 export type { OpsMetricsCollectorOptions } from './os';
 export { ProcessMetricsCollector } from './process';
 export { ServerMetricsCollector } from './server';
+export { EventLoopDelaysMonitor } from './event_loop_delays_monitor';

packages/core/metrics/core-metrics-collectors-server-internal/src/mocks_internal.ts

@@ -0,0 +1,133 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+import moment from 'moment';
+import type {
+  MetricsCollector,
+  IntervalHistogram,
+  OpsProcessMetrics,
+} from '@kbn/core-metrics-server';
+import { EventLoopDelaysMonitor } from './event_loop_delays_monitor';
+
+// internal duplicate of metricsCollectorMock
+const createCollector = <T = any>(
+  collectReturnValue: any = {}
+): jest.Mocked<MetricsCollector<T>> => {
+  const collector: jest.Mocked<MetricsCollector<T>> = {
+    collect: jest.fn().mockResolvedValue(collectReturnValue),
+    reset: jest.fn(),
+  };
+
+  return collector;
+};
+
+export const metricsCollectorMock = {
+  create: createCollector,
+};
+
+// internal duplicate of process.mocks
+function createMockOpsProcessMetrics(): OpsProcessMetrics {
+  const histogram = mocked.createHistogram();
+
+  return {
+    memory: {
+      heap: { total_in_bytes: 1, used_in_bytes: 1, size_limit: 1 },
+      resident_set_size_in_bytes: 1,
+    },
+    event_loop_delay: 1,
+    event_loop_delay_histogram: histogram,
+    pid: 1,
+    uptime_in_millis: 1,
+  };
+}
+
+// internal duplicate of base collector mock
+const createMock = () => {
+  const mocked: jest.Mocked<MetricsCollector<any>> = {
+    collect: jest.fn(),
+    reset: jest.fn(),
+  };
+
+  mocked.collect.mockResolvedValue({});
+
+  return mocked;
+};
+
+// internal duplicate of `collectorMock` exposed in @kbn/core-metrics-collectors-server-mocks for unit tests*/
+export const collectorMock = {
+  create: createMock,
+  createOpsProcessMetrics: createMockOpsProcessMetrics,
+};
+
+// internal duplicate of EventLoopDelay mocks exposed in @kbn/core-metrics-collectors-server-mocks for unit tests
+function createMockRawNsDataHistogram(
+  overwrites: Partial<IntervalHistogram> = {}
+): IntervalHistogram {
+  const now = Date.now();
+
+  const mockedRawCollectedDataInNs = {
+    min: 9093120,
+    max: 53247999,
+    mean: 11993238,
+    exceeds: 0,
+    stddev: 1168191,
+    fromTimestamp: moment(now).toISOString(),
+    lastUpdatedAt: moment(now).toISOString(),
+    percentiles: {
+      '50': 12607487,
+      '75': 12615679,
+      '95': 12648447,
+      '99': 12713983,
+    },
+    ...overwrites,
+  };
+  return mockedRawCollectedDataInNs;
+}
+
+function createMockMonitorDataMsHistogram(
+  overwrites: Partial<IntervalHistogram> = {}
+): IntervalHistogram {
+  const now = Date.now();
+
+  const mockedRawCollectedDataInMs = {
+    min: 9.09312,
+    max: 53.247999,
+    mean: 11.993238,
+    exceeds: 0,
+    stddev: 1.168191,
+    fromTimestamp: moment(now).toISOString(),
+    lastUpdatedAt: moment(now).toISOString(),
+    percentiles: {
+      '50': 12.607487,
+      '75': 12.615679,
+      '95': 12.648447,
+      '99': 12.713983,
+    },
+    ...overwrites,
+  };
+  return mockedRawCollectedDataInMs;
+}
+
+function createMockEventLoopDelaysMonitor() {
+  const mockCollect = jest.fn();
+  const MockEventLoopDelaysMonitor: jest.MockedClass<typeof EventLoopDelaysMonitor> = jest
+    .fn()
+    .mockReturnValue({
+      collect: mockCollect,
+      reset: jest.fn(),
+      stop: jest.fn(),
+    });
+
+  mockCollect.mockReturnValue(createMockMonitorDataMsHistogram()); // this must mock the return value of the public collect method from this monitor.
+
+  return new MockEventLoopDelaysMonitor();
+}
+
+export const mocked = {
+  createHistogram: createMockRawNsDataHistogram, // raw data as received from Node.js perf_hooks.monitorEventLoopDelay([options])
+  createEventLoopDelaysMonitor: createMockEventLoopDelaysMonitor,
+};

packages/core/metrics/core-metrics-collectors-server-internal/src/os.test.mocks.ts

@@ -6,8 +6,7 @@
  * Side Public License, v 1.
  */
 
-import { metricsCollectorMock } from './collector.mock';
+import { metricsCollectorMock } from './mocks_internal';
-
 export const cgroupCollectorMock = metricsCollectorMock.create();
 jest.doMock('./cgroup', () => ({
   OsCgroupMetricsCollector: jest.fn(() => cgroupCollectorMock),

packages/core/metrics/core-metrics-collectors-server-internal/src/os.ts

@@ -9,8 +9,8 @@
 import os from 'os';
 import getosAsync, { LinuxOs } from 'getos';
 import { promisify } from 'util';
-import { Logger } from '@kbn/logging';
+import type { Logger } from '@kbn/logging';
-import { OpsOsMetrics, MetricsCollector } from './types';
+import type { OpsOsMetrics, MetricsCollector } from '@kbn/core-metrics-server';
 import { OsCgroupMetricsCollector } from './cgroup';
 
 const getos = promisify(getosAsync);

packages/core/metrics/core-metrics-collectors-server-internal/src/process.ts

@@ -7,8 +7,8 @@
  */
 
 import v8 from 'v8';
-import { OpsProcessMetrics, MetricsCollector } from './types';
+import type { OpsProcessMetrics, MetricsCollector } from '@kbn/core-metrics-server';
-import { EventLoopDelaysMonitor } from '../event_loop_delays';
+import { EventLoopDelaysMonitor } from './event_loop_delays_monitor';
 
 export class ProcessMetricsCollector implements MetricsCollector<OpsProcessMetrics[]> {
   static getMainThreadMetrics(processes: OpsProcessMetrics[]): undefined | OpsProcessMetrics {

packages/core/metrics/core-metrics-collectors-server-internal/src/server.ts

@@ -6,8 +6,8 @@
  * Side Public License, v 1.
  */
 
-import { ResponseObject, Server as HapiServer } from '@hapi/hapi';
+import type { ResponseObject, Server as HapiServer } from '@hapi/hapi';
-import { OpsServerMetrics, MetricsCollector } from './types';
+import type { OpsServerMetrics, MetricsCollector } from '@kbn/core-metrics-server';
 
 interface ServerResponseTime {
   count: number;

packages/core/metrics/core-metrics-collectors-server-internal/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "extends": "../../../../tsconfig.bazel.json",
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "emitDeclarationOnly": true,
+    "outDir": "target_types",
+    "rootDir": "src",
+    "stripInternal": false,
+    "types": [
+      "jest",
+      "node"
+    ]
+  },
+  "include": [
+    "src/**/*"
+  ]
+}

packages/core/metrics/core-metrics-collectors-server-mocks/BUILD.bazel

@@ -0,0 +1,102 @@
+load("@npm//@bazel/typescript:index.bzl", "ts_config")
+load("@build_bazel_rules_nodejs//:index.bzl", "js_library")
+load("//src/dev/bazel:index.bzl", "jsts_transpiler", "pkg_npm", "pkg_npm_types", "ts_project")
+
+PKG_DIRNAME = "core-metrics-collectors-server-mocks"
+PKG_REQUIRE_NAME = "@kbn/core-metrics-collectors-server-mocks"
+
+SOURCE_FILES = glob(
+  [
+    "src/**/*.ts",
+  ],
+  exclude = [
+    "**/*.test.*",
+    "**/*.stories.*",
+  ],
+)
+
+SRCS = SOURCE_FILES
+
+filegroup(
+  name = "srcs",
+  srcs = SRCS,
+)
+
+NPM_MODULE_EXTRA_FILES = [
+  "package.json",
+]
+
+RUNTIME_DEPS = [
+  "@npm//moment",
+  "//packages/core/metrics/core-metrics-server",
+]
+
+TYPES_DEPS = [
+  "@npm//@types/node",
+  "@npm//@types/jest",
+  "@npm//moment",
+  "//packages/core/metrics/core-metrics-server:npm_module_types",
+  "//packages/core/metrics/core-metrics-collectors-server-internal:npm_module_types",
+]
+
+jsts_transpiler(
+  name = "target_node",
+  srcs = SRCS,
+  build_pkg_name = package_name(),
+)
+
+ts_config(
+  name = "tsconfig",
+  src = "tsconfig.json",
+  deps = [
+    "//:tsconfig.base.json",
+    "//:tsconfig.bazel.json",
+  ],
+)
+
+ts_project(
+  name = "tsc_types",
+  args = ['--pretty'],
+  srcs = SRCS,
+  deps = TYPES_DEPS,
+  declaration = True,
+  declaration_map = True,
+  emit_declaration_only = True,
+  out_dir = "target_types",
+  root_dir = "src",
+  tsconfig = ":tsconfig",
+)
+
+js_library(
+  name = PKG_DIRNAME,
+  srcs = NPM_MODULE_EXTRA_FILES,
+  deps = RUNTIME_DEPS + [":target_node"],
+  package_name = PKG_REQUIRE_NAME,
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm(
+  name = "npm_module",
+  deps = [":" + PKG_DIRNAME],
+)
+
+filegroup(
+  name = "build",
+  srcs = [":npm_module"],
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm_types(
+  name = "npm_module_types",
+  srcs = SRCS,
+  deps = [":tsc_types"],
+  package_name = PKG_REQUIRE_NAME,
+  tsconfig = ":tsconfig",
+  visibility = ["//visibility:public"],
+)
+
+filegroup(
+  name = "build_types",
+  srcs = [":npm_module_types"],
+  visibility = ["//visibility:public"],
+)

packages/core/metrics/core-metrics-collectors-server-mocks/README.md

@@ -0,0 +1,3 @@
+# @kbn/core-metrics-collectors-server-mocks
+
+This package contains the mocks for Core's server-side metrics service collectors and event loop delays monitor.

packages/core/metrics/core-metrics-collectors-server-mocks/jest.config.js

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test/jest_node',
+  rootDir: '../../../..',
+  roots: ['<rootDir>/packages/core/metrics/core-metrics-collectors-server-mocks'],
+};

packages/core/metrics/core-metrics-collectors-server-mocks/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@kbn/core-metrics-collectors-server-mocks",
+  "private": true,
+  "version": "1.0.0",
+  "main": "./target_node/index.js",
+  "license": "SSPL-1.0 OR Elastic License 2.0"
+}

packages/core/metrics/core-metrics-collectors-server-mocks/src/collector.mock.ts

@@ -6,7 +6,7 @@
  * Side Public License, v 1.
  */
 
-import { MetricsCollector } from './types';
+import type { MetricsCollector } from '@kbn/core-metrics-server';
 
 const createCollector = <T = any>(
   collectReturnValue: any = {}

packages/core/metrics/core-metrics-collectors-server-mocks/src/event_loop_delays_monitor.mocks.ts

@@ -6,8 +6,8 @@
  * Side Public License, v 1.
  */
 import moment from 'moment';
-import type { EventLoopDelaysMonitor } from './event_loop_delays_monitor';
+import type { IntervalHistogram } from '@kbn/core-metrics-server';
-import type { IntervalHistogram } from '../types';
+import type { EventLoopDelaysMonitor } from '@kbn/core-metrics-collectors-server-internal';
 
 function createMockRawNsDataHistogram(
   overwrites: Partial<IntervalHistogram> = {}

packages/core/metrics/core-metrics-collectors-server-mocks/src/index.ts

@@ -0,0 +1,12 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+export { metricsCollectorMock } from './collector.mock';
+export { collectorMock } from './mocks';
+export { createMockOpsProcessMetrics } from './process.mocks';
+export { mocked } from './event_loop_delays_monitor.mocks';

packages/core/metrics/core-metrics-collectors-server-mocks/src/mocks.ts

@@ -6,7 +6,7 @@
  * Side Public License, v 1.
  */
 
-import type { MetricsCollector } from './types';
+import type { MetricsCollector } from '@kbn/core-metrics-server';
 import { createMockOpsProcessMetrics } from './process.mocks';
 
 const createMock = () => {

packages/core/metrics/core-metrics-collectors-server-mocks/src/process.mocks.ts

@@ -5,8 +5,8 @@
  * in compliance with, at your election, the Elastic License 2.0 or the Server
  * Side Public License, v 1.
  */
-import { mocked } from '../event_loop_delays/event_loop_delays_monitor.mocks';
+import type { OpsProcessMetrics } from '@kbn/core-metrics-server';
-import type { OpsProcessMetrics } from './types';
+import { mocked } from './event_loop_delays_monitor.mocks';
 
 export function createMockOpsProcessMetrics(): OpsProcessMetrics {
   const histogram = mocked.createHistogram();

packages/core/metrics/core-metrics-collectors-server-mocks/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "extends": "../../../../tsconfig.bazel.json",
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "emitDeclarationOnly": true,
+    "outDir": "target_types",
+    "rootDir": "src",
+    "stripInternal": false,
+    "types": [
+      "jest",
+      "node"
+    ]
+  },
+  "include": [
+    "src/**/*"
+  ]
+}

packages/core/metrics/core-metrics-server-internal/BUILD.bazel

@@ -0,0 +1,115 @@
+load("@npm//@bazel/typescript:index.bzl", "ts_config")
+load("@build_bazel_rules_nodejs//:index.bzl", "js_library")
+load("//src/dev/bazel:index.bzl", "jsts_transpiler", "pkg_npm", "pkg_npm_types", "ts_project")
+
+PKG_DIRNAME = "core-metrics-server-internal"
+PKG_REQUIRE_NAME = "@kbn/core-metrics-server-internal"
+
+SOURCE_FILES = glob(
+  [
+    "src/**/*.ts",
+  ],
+  exclude = [
+    "**/*.test.*",
+    "**/*.stories.*",
+  ],
+)
+
+SRCS = SOURCE_FILES
+
+filegroup(
+  name = "srcs",
+  srcs = SRCS,
+)
+
+NPM_MODULE_EXTRA_FILES = [
+  "package.json",
+]
+
+RUNTIME_DEPS = [
+  "@npm//rxjs",
+  "@npm//moment",
+  "//packages/kbn-logging-mocks",
+  "//packages/kbn-config-schema",
+  "//packages/core/http/core-http-server-mocks",
+  "//packages/core/metrics/core-metrics-collectors-server-internal",
+  "//packages/core/metrics/core-metrics-collectors-server-mocks",
+
+]
+
+TYPES_DEPS = [
+  "@npm//@types/node",
+  "@npm//@types/jest",
+  "@npm//rxjs",
+  "@npm//moment",
+  "@npm//@hapi/hapi",
+  "//packages/kbn-logging:npm_module_types",
+  "//packages/kbn-config-schema:npm_module_types",
+  "//packages/core/base/core-base-server-internal:npm_module_types",
+  "//packages/core/http/core-http-server-internal:npm_module_types",
+  "//packages/core/metrics/core-metrics-server:npm_module_types",
+  "//packages/core/metrics/core-metrics-collectors-server-internal:npm_module_types",
+
+]
+
+jsts_transpiler(
+  name = "target_node",
+  srcs = SRCS,
+  build_pkg_name = package_name(),
+)
+
+ts_config(
+  name = "tsconfig",
+  src = "tsconfig.json",
+  deps = [
+    "//:tsconfig.base.json",
+    "//:tsconfig.bazel.json",
+  ],
+)
+
+ts_project(
+  name = "tsc_types",
+  args = ['--pretty'],
+  srcs = SRCS,
+  deps = TYPES_DEPS,
+  declaration = True,
+  declaration_map = True,
+  emit_declaration_only = True,
+  out_dir = "target_types",
+  root_dir = "src",
+  tsconfig = ":tsconfig",
+)
+
+js_library(
+  name = PKG_DIRNAME,
+  srcs = NPM_MODULE_EXTRA_FILES,
+  deps = RUNTIME_DEPS + [":target_node"],
+  package_name = PKG_REQUIRE_NAME,
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm(
+  name = "npm_module",
+  deps = [":" + PKG_DIRNAME],
+)
+
+filegroup(
+  name = "build",
+  srcs = [":npm_module"],
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm_types(
+  name = "npm_module_types",
+  srcs = SRCS,
+  deps = [":tsc_types"],
+  package_name = PKG_REQUIRE_NAME,
+  tsconfig = ":tsconfig",
+  visibility = ["//visibility:public"],
+)
+
+filegroup(
+  name = "build_types",
+  srcs = [":npm_module_types"],
+  visibility = ["//visibility:public"],
+)

packages/core/metrics/core-metrics-server-internal/README.md

@@ -0,0 +1,3 @@
+# @kbn/core-metrics-server-internal
+
+This package contains the internal types and implementation for Core's server-side metrics service.

packages/core/metrics/core-metrics-server-internal/jest.config.js

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test/jest_node',
+  rootDir: '../../../..',
+  roots: ['<rootDir>/packages/core/metrics/core-metrics-server-internal'],
+};

packages/core/metrics/core-metrics-server-internal/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@kbn/core-metrics-server-internal",
+  "private": true,
+  "version": "1.0.0",
+  "main": "./target_node/index.js",
+  "license": "SSPL-1.0 OR Elastic License 2.0"
+}

packages/core/metrics/core-metrics-server-internal/src/index.ts

@@ -0,0 +1,15 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+export {
+  type MetricsServiceSetupDeps,
+  type InternalMetricsServiceStart,
+  type InternalMetricsServiceSetup,
+  MetricsService,
+} from './metrics_service';
+export { opsConfig, type OpsConfigType } from './ops_config';

packages/core/metrics/core-metrics-server-internal/src/logging/get_ops_metrics_log.test.ts

@@ -6,9 +6,9 @@
  * Side Public License, v 1.
  */
 
-import { OpsMetrics } from '..';
+import type { OpsMetrics } from '@kbn/core-metrics-server';
 import { getEcsOpsMetricsLog } from './get_ops_metrics_log';
-import { collectorMock } from '../collectors/mocks';
+import { collectorMock } from '@kbn/core-metrics-collectors-server-mocks';
 
 function createBaseOpsMetrics(): OpsMetrics {
   const mockProcess = collectorMock.createOpsProcessMetrics();

packages/core/metrics/core-metrics-server-internal/src/logging/get_ops_metrics_log.ts

@@ -8,7 +8,7 @@
 
 import numeral from '@elastic/numeral';
 import { LogMeta } from '@kbn/logging';
-import { OpsMetrics } from '..';
+import type { OpsMetrics } from '@kbn/core-metrics-server';
 
 /**
  * Converts ops metrics into ECS-compliant `LogMeta` for logging

packages/core/metrics/core-metrics-server-internal/src/metrics_service.test.mocks.ts

@@ -6,7 +6,7 @@
  * Side Public License, v 1.
  */
 
-import { collectorMock } from './collectors/mocks';
+import { collectorMock } from '@kbn/core-metrics-collectors-server-mocks';
 
 export const mockOpsCollector = collectorMock.create();
 

packages/core/metrics/core-metrics-server-internal/src/metrics_service.ts

@@ -8,17 +8,27 @@
 
 import { firstValueFrom, ReplaySubject } from 'rxjs';
 import type { CoreContext, CoreService } from '@kbn/core-base-server-internal';
-import { Logger } from '@kbn/logging';
+import type { Logger } from '@kbn/logging';
 import type { InternalHttpServiceSetup } from '@kbn/core-http-server-internal';
-import { InternalMetricsServiceSetup, InternalMetricsServiceStart, OpsMetrics } from './types';
+import type {
+  OpsMetrics,
+  MetricsServiceSetup,
+  MetricsServiceStart,
+} from '@kbn/core-metrics-server';
 import { OpsMetricsCollector } from './ops_metrics_collector';
-import { opsConfig, OpsConfigType } from './ops_config';
+import { OPS_CONFIG_PATH, type OpsConfigType } from './ops_config';
 import { getEcsOpsMetricsLog } from './logging';
 
 export interface MetricsServiceSetupDeps {
   http: InternalHttpServiceSetup;
 }
 
+/** @internal */
+export type InternalMetricsServiceSetup = MetricsServiceSetup;
+
+/** @internal */
+export type InternalMetricsServiceStart = MetricsServiceStart;
+
 /** @internal */
 export class MetricsService
   implements CoreService<InternalMetricsServiceSetup, InternalMetricsServiceStart>
@@ -37,7 +47,7 @@ export class MetricsService
 
   public async setup({ http }: MetricsServiceSetupDeps): Promise<InternalMetricsServiceSetup> {
     const config = await firstValueFrom(
-      this.coreContext.configService.atPath<OpsConfigType>(opsConfig.path)
+      this.coreContext.configService.atPath<OpsConfigType>(OPS_CONFIG_PATH)
     );
 
     this.metricsCollector = new OpsMetricsCollector(http.server, {

packages/core/metrics/core-metrics-server-internal/src/ops_config.ts

@@ -0,0 +1,42 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { schema } from '@kbn/config-schema';
+import { ServiceConfigDescriptor } from '@kbn/core-base-server-internal';
+import type { Duration } from 'moment';
+
+/** @internal */
+export const OPS_CONFIG_PATH = 'ops' as const;
+
+/** @internal */
+const OPS_METRICS_INTERVAL = '5s';
+
+/** @internal */
+interface OpsConfigCGroupOverridesOps {
+  cpuPath?: string;
+  cpuAcctPath?: string;
+}
+
+/** @internal */
+export interface OpsConfigType {
+  interval: Duration;
+  cGroupOverrides: OpsConfigCGroupOverridesOps;
+}
+
+const configSchema = schema.object({
+  interval: schema.duration({ defaultValue: OPS_METRICS_INTERVAL }),
+  cGroupOverrides: schema.object({
+    cpuPath: schema.maybe(schema.string()),
+    cpuAcctPath: schema.maybe(schema.string()),
+  }),
+});
+
+export const opsConfig: ServiceConfigDescriptor<OpsConfigType> = {
+  path: OPS_CONFIG_PATH,
+  schema: configSchema,
+};

packages/core/metrics/core-metrics-server-internal/src/ops_metrics_collector.test.mocks.ts

@@ -6,19 +6,16 @@
  * Side Public License, v 1.
  */
 
-import { collectorMock } from './collectors/mocks';
+import { collectorMock } from '@kbn/core-metrics-collectors-server-mocks';
 
 export const mockOsCollector = collectorMock.create();
-jest.doMock('./collectors/os', () => ({
-  OsMetricsCollector: jest.fn().mockImplementation(() => mockOsCollector),
-}));
-
 export const mockProcessCollector = collectorMock.create();
-jest.doMock('./collectors/process', () => ({
-  ProcessMetricsCollector: jest.fn().mockImplementation(() => mockProcessCollector),
-}));
-
 export const mockServerCollector = collectorMock.create();
-jest.doMock('./collectors/server', () => ({
+
-  ServerMetricsCollector: jest.fn().mockImplementation(() => mockServerCollector),
+jest.doMock('@kbn/core-metrics-collectors-server-internal', () => {
-}));
+  return {
+    OsMetricsCollector: jest.fn().mockImplementation(() => mockOsCollector),
+    ProcessMetricsCollector: jest.fn().mockImplementation(() => mockProcessCollector),
+    ServerMetricsCollector: jest.fn().mockImplementation(() => mockServerCollector),
+  };
+});

packages/core/metrics/core-metrics-server-internal/src/ops_metrics_collector.ts

@@ -7,14 +7,13 @@
  */
 
 import { Server as HapiServer } from '@hapi/hapi';
+import type { OpsMetrics, MetricsCollector } from '@kbn/core-metrics-server';
 import {
   ProcessMetricsCollector,
   OsMetricsCollector,
-  OpsMetricsCollectorOptions,
+  type OpsMetricsCollectorOptions,
   ServerMetricsCollector,
-  MetricsCollector,
+} from '@kbn/core-metrics-collectors-server-internal';
-} from './collectors';
-import { OpsMetrics } from './types';
 
 export class OpsMetricsCollector implements MetricsCollector<OpsMetrics> {
   private readonly processCollector: ProcessMetricsCollector;

packages/core/metrics/core-metrics-server-internal/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "extends": "../../../../tsconfig.bazel.json",
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "emitDeclarationOnly": true,
+    "outDir": "target_types",
+    "rootDir": "src",
+    "stripInternal": false,
+    "types": [
+      "jest",
+      "node"
+    ]
+  },
+  "include": [
+    "src/**/*"
+  ]
+}

packages/core/metrics/core-metrics-server-mocks/BUILD.bazel

@@ -0,0 +1,104 @@
+load("@npm//@bazel/typescript:index.bzl", "ts_config")
+load("@build_bazel_rules_nodejs//:index.bzl", "js_library")
+load("//src/dev/bazel:index.bzl", "jsts_transpiler", "pkg_npm", "pkg_npm_types", "ts_project")
+
+PKG_DIRNAME = "core-metrics-server-mocks"
+PKG_REQUIRE_NAME = "@kbn/core-metrics-server-mocks"
+
+SOURCE_FILES = glob(
+  [
+    "src/**/*.ts",
+  ],
+  exclude = [
+    "**/*.test.*",
+    "**/*.stories.*",
+  ],
+)
+
+SRCS = SOURCE_FILES
+
+filegroup(
+  name = "srcs",
+  srcs = SRCS,
+)
+
+NPM_MODULE_EXTRA_FILES = [
+  "package.json",
+]
+
+RUNTIME_DEPS = [
+  "@npm//rxjs",
+  "//packages/core/metrics/core-metrics-collectors-server-mocks",
+]
+
+TYPES_DEPS = [
+  "@npm//@types/node",
+  "@npm//@types/jest",
+  "@npm//rxjs",
+  "//packages/kbn-utility-types:npm_module_types",
+  "//packages/core/metrics/core-metrics-server:npm_module_types",
+  "//packages/core/metrics/core-metrics-server-internal:npm_module_types",
+  "//packages/core/metrics/core-metrics-collectors-server-mocks:npm_module_types",
+]
+
+jsts_transpiler(
+  name = "target_node",
+  srcs = SRCS,
+  build_pkg_name = package_name(),
+)
+
+ts_config(
+  name = "tsconfig",
+  src = "tsconfig.json",
+  deps = [
+    "//:tsconfig.base.json",
+    "//:tsconfig.bazel.json",
+  ],
+)
+
+ts_project(
+  name = "tsc_types",
+  args = ['--pretty'],
+  srcs = SRCS,
+  deps = TYPES_DEPS,
+  declaration = True,
+  declaration_map = True,
+  emit_declaration_only = True,
+  out_dir = "target_types",
+  root_dir = "src",
+  tsconfig = ":tsconfig",
+)
+
+js_library(
+  name = PKG_DIRNAME,
+  srcs = NPM_MODULE_EXTRA_FILES,
+  deps = RUNTIME_DEPS + [":target_node"],
+  package_name = PKG_REQUIRE_NAME,
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm(
+  name = "npm_module",
+  deps = [":" + PKG_DIRNAME],
+)
+
+filegroup(
+  name = "build",
+  srcs = [":npm_module"],
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm_types(
+  name = "npm_module_types",
+  srcs = SRCS,
+  deps = [":tsc_types"],
+  package_name = PKG_REQUIRE_NAME,
+  tsconfig = ":tsconfig",
+  visibility = ["//visibility:public"],
+)
+
+filegroup(
+  name = "build_types",
+  srcs = [":npm_module_types"],
+  visibility = ["//visibility:public"],
+)

packages/core/metrics/core-metrics-server-mocks/README.md

@@ -0,0 +1,3 @@
+# @kbn/core-metrics-server-mocks
+
+This package contains the mocks for Core's server-side metrics service.

packages/core/metrics/core-metrics-server-mocks/jest.config.js

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test/jest_node',
+  rootDir: '../../../..',
+  roots: ['<rootDir>/packages/core/metrics/core-metrics-server-mocks'],
+};

packages/core/metrics/core-metrics-server-mocks/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@kbn/core-metrics-server-mocks",
+  "private": true,
+  "version": "1.0.0",
+  "main": "./target_node/index.js",
+  "license": "SSPL-1.0 OR Elastic License 2.0"
+}

packages/core/metrics/core-metrics-server-mocks/src/index.ts

@@ -6,4 +6,4 @@
  * Side Public License, v 1.
  */
 
-export { EventLoopDelaysMonitor } from './event_loop_delays_monitor';
+export { metricsServiceMock } from './metrics_service.mock';

packages/core/metrics/core-metrics-server-mocks/src/metrics_service.mock.ts

@@ -8,15 +8,16 @@
 
 import { BehaviorSubject } from 'rxjs';
 import type { PublicMethodsOf } from '@kbn/utility-types';
-import type { MetricsService } from './metrics_service';
+import type {
-import { collectorMock } from './collectors/mocks';
+  MetricsService,
-import { mocked as eventLoopDelaysMonitorMock } from './event_loop_delays/event_loop_delays_monitor.mocks';
-import {
   InternalMetricsServiceSetup,
   InternalMetricsServiceStart,
-  MetricsServiceSetup,
+} from '@kbn/core-metrics-server-internal';
-  MetricsServiceStart,
+import {
-} from './types';
+  mocked as eventLoopDelaysMonitorMock,
+  collectorMock,
+} from '@kbn/core-metrics-collectors-server-mocks';
+import type { MetricsServiceSetup, MetricsServiceStart } from '@kbn/core-metrics-server';
 
 const createInternalSetupContractMock = () => {
   const setupContract: jest.Mocked<InternalMetricsServiceSetup> = {

packages/core/metrics/core-metrics-server-mocks/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "extends": "../../../../tsconfig.bazel.json",
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "emitDeclarationOnly": true,
+    "outDir": "target_types",
+    "rootDir": "src",
+    "stripInternal": false,
+    "types": [
+      "jest",
+      "node"
+    ]
+  },
+  "include": [
+    "src/**/*"
+  ]
+}

packages/core/metrics/core-metrics-server/BUILD.bazel

@@ -0,0 +1,99 @@
+load("@npm//@bazel/typescript:index.bzl", "ts_config")
+load("@build_bazel_rules_nodejs//:index.bzl", "js_library")
+load("//src/dev/bazel:index.bzl", "jsts_transpiler", "pkg_npm", "pkg_npm_types", "ts_project")
+
+PKG_DIRNAME = "core-metrics-server"
+PKG_REQUIRE_NAME = "@kbn/core-metrics-server"
+
+SOURCE_FILES = glob(
+  [
+    "src/**/*.ts",
+  ],
+  exclude = [
+    "**/*.test.*",
+    "**/*.stories.*",
+  ],
+)
+
+SRCS = SOURCE_FILES
+
+filegroup(
+  name = "srcs",
+  srcs = SRCS,
+)
+
+NPM_MODULE_EXTRA_FILES = [
+  "package.json",
+]
+
+RUNTIME_DEPS = [
+]
+
+TYPES_DEPS = [
+  "@npm//@types/node",
+  "@npm//@types/jest",
+  "@npm//rxjs",
+  "//packages/kbn-utility-types:npm_module_types"
+]
+
+jsts_transpiler(
+  name = "target_node",
+  srcs = SRCS,
+  build_pkg_name = package_name(),
+)
+
+ts_config(
+  name = "tsconfig",
+  src = "tsconfig.json",
+  deps = [
+    "//:tsconfig.base.json",
+    "//:tsconfig.bazel.json",
+  ],
+)
+
+ts_project(
+  name = "tsc_types",
+  args = ['--pretty'],
+  srcs = SRCS,
+  deps = TYPES_DEPS,
+  declaration = True,
+  declaration_map = True,
+  emit_declaration_only = True,
+  out_dir = "target_types",
+  root_dir = "src",
+  tsconfig = ":tsconfig",
+)
+
+js_library(
+  name = PKG_DIRNAME,
+  srcs = NPM_MODULE_EXTRA_FILES,
+  deps = RUNTIME_DEPS + [":target_node"],
+  package_name = PKG_REQUIRE_NAME,
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm(
+  name = "npm_module",
+  deps = [":" + PKG_DIRNAME],
+)
+
+filegroup(
+  name = "build",
+  srcs = [":npm_module"],
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm_types(
+  name = "npm_module_types",
+  srcs = SRCS,
+  deps = [":tsc_types"],
+  package_name = PKG_REQUIRE_NAME,
+  tsconfig = ":tsconfig",
+  visibility = ["//visibility:public"],
+)
+
+filegroup(
+  name = "build_types",
+  srcs = [":npm_module_types"],
+  visibility = ["//visibility:public"],
+)

packages/core/metrics/core-metrics-server/README.md

@@ -0,0 +1,3 @@
+# @kbn/core-metrics-server
+
+This package contains the public types for Core's server-side metrics service.

packages/core/metrics/core-metrics-server/jest.config.js

@@ -0,0 +1,13 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+module.exports = {
+  preset: '@kbn/test/jest_node',
+  rootDir: '../../../..',
+  roots: ['<rootDir>/packages/core/metrics/core-metrics-server'],
+};

packages/core/metrics/core-metrics-server/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@kbn/core-metrics-server",
+  "private": true,
+  "version": "1.0.0",
+  "main": "./target_node/index.js",
+  "license": "SSPL-1.0 OR Elastic License 2.0"
+}

packages/core/metrics/core-metrics-server/src/collectors.ts

@@ -0,0 +1,45 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+import type { MaybePromise } from '@kbn/utility-types';
+import type { IntervalHistogram } from './metrics';
+
+/** Base interface for all metrics gatherers */
+export interface MetricsCollector<T> {
+  /** collect the data currently gathered by the collector */
+  collect(): MaybePromise<T>;
+  /** reset the internal state of the collector */
+  reset(): void;
+}
+
+/**
+ * Creating a new instance from EventLoopDelaysMonitor will
+ * automatically start tracking event loop delays.
+ * See {@link IntervalHistogram}
+ * @public
+ *
+ */
+export interface IEventLoopDelaysMonitor<T = IntervalHistogram> {
+  /**
+   * Collect gathers event loop delays metrics from nodejs perf_hooks.monitorEventLoopDelay
+   * the histogram calculations start from the last time `reset` was called or this
+   * EventLoopDelaysMonitor instance was created.
+   *
+   * Returns metrics in milliseconds.
+
+   * @returns {IntervalHistogram}
+   */
+  collect(): T;
+  /**
+   * Resets the collected histogram data.
+   */
+  reset(): void;
+  /**
+   * Disables updating the interval timer for collecting new data points.
+   */
+  stop(): void;
+}

packages/core/metrics/core-metrics-server/src/contracts.ts

@@ -0,0 +1,39 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import type { Observable } from 'rxjs';
+import type { OpsMetrics } from './metrics';
+/**
+ * APIs to retrieves metrics gathered and exposed by the core platform.
+ *
+ * @public
+ */
+export interface MetricsServiceSetup {
+  /** Interval metrics are collected in milliseconds */
+  readonly collectionInterval: number;
+
+  /**
+   * Retrieve an observable emitting the {@link OpsMetrics} gathered.
+   * The observable will emit an initial value during core's `start` phase, and a new value every fixed interval of time,
+   * based on the `opts.interval` configuration property.
+   *
+   * @example
+   * ```ts
+   * core.metrics.getOpsMetrics$().subscribe(metrics => {
+   *   // do something with the metrics
+   * })
+   * ```
+   */
+  getOpsMetrics$: () => Observable<OpsMetrics>;
+}
+/**
+ * {@inheritdoc MetricsServiceSetup}
+ *
+ * @public
+ */
+export type MetricsServiceStart = MetricsServiceSetup;

packages/core/metrics/core-metrics-server/src/index.ts

@@ -0,0 +1,17 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+export type { MetricsServiceSetup, MetricsServiceStart } from './contracts';
+export type { MetricsCollector, IEventLoopDelaysMonitor } from './collectors';
+export type {
+  OpsMetrics,
+  IntervalHistogram,
+  OpsProcessMetrics,
+  OpsOsMetrics,
+  OpsServerMetrics,
+} from './metrics';

packages/core/metrics/core-metrics-server/src/metrics.ts

@@ -5,15 +5,39 @@
  * in compliance with, at your election, the Elastic License 2.0 or the Server
  * Side Public License, v 1.
  */
-import { MaybePromise } from '@kbn/utility-types';
-import type { IntervalHistogram } from '../types';
 
-/** Base interface for all metrics gatherers */
+/**
-export interface MetricsCollector<T> {
+ * an IntervalHistogram object that samples and reports the event loop delay over time.
-  /** collect the data currently gathered by the collector */
+ * The delays will be reported in milliseconds.
-  collect(): MaybePromise<T>;
+ *
-  /** reset the internal state of the collector */
+ * @public
-  reset(): void;
+ */
+export interface IntervalHistogram {
+  // The first timestamp the interval timer kicked in for collecting data points.
+  fromTimestamp: string;
+  // Last timestamp the interval timer kicked in for collecting data points.
+  lastUpdatedAt: string;
+  // The minimum recorded event loop delay.
+  min: number;
+  // The maximum recorded event loop delay.
+  max: number;
+  // The mean of the recorded event loop delays.
+  mean: number;
+  // The number of times the event loop delay exceeded the maximum 1 hour event loop delay threshold.
+  exceeds: number;
+  // The standard deviation of the recorded event loop delays.
+  stddev: number;
+  // An object detailing the accumulated percentile distribution.
+  percentiles: {
+    // 50th percentile of delays of the collected data points.
+    50: number;
+    // 75th percentile of delays of the collected data points.
+    75: number;
+    // 95th percentile of delays of the collected data points.
+    95: number;
+    // 99th percentile of delays of the collected data points.
+    99: number;
+  };
 }
 
 /**
@@ -131,3 +155,30 @@ export interface OpsServerMetrics {
   /** number of current concurrent connections to the server */
   concurrent_connections: number;
 }
+
+/**
+ * Regroups metrics gathered by all the collectors.
+ * This contains metrics about the os/runtime, the kibana process and the http server.
+ *
+ * @public
+ */
+export interface OpsMetrics {
+  /** Time metrics were recorded at. */
+  collected_at: Date;
+  /**
+   * Process related metrics.
+   * @deprecated use the processes field instead.
+   * @removeBy 8.8.0
+   */
+  process: OpsProcessMetrics;
+  /** Process related metrics. Reports an array of objects for each kibana pid.*/
+  processes: OpsProcessMetrics[];
+  /** OS related metrics */
+  os: OpsOsMetrics;
+  /** server response time stats */
+  response_times: OpsServerMetrics['response_times'];
+  /** server requests stats */
+  requests: OpsServerMetrics['requests'];
+  /** number of current concurrent connections to the server */
+  concurrent_connections: OpsServerMetrics['concurrent_connections'];
+}

packages/core/metrics/core-metrics-server/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "extends": "../../../../tsconfig.bazel.json",
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "emitDeclarationOnly": true,
+    "outDir": "target_types",
+    "rootDir": "src",
+    "stripInternal": false,
+    "types": [
+      "jest",
+      "node"
+    ]
+  },
+  "include": [
+    "src/**/*"
+  ]
+}

src/core/public/core_app/status/lib/load_status.test.ts

@@ -9,7 +9,7 @@
 import { httpServiceMock } from '@kbn/core-http-browser-mocks';
 import type { StatusResponse } from '../../../../types/status';
 import { notificationServiceMock } from '../../../notifications/notifications_service.mock';
-import { mocked } from '../../../../server/metrics/event_loop_delays/event_loop_delays_monitor.mocks';
+import { mocked } from '@kbn/core-metrics-collectors-server-mocks';
 import { loadStatus } from './load_status';
 
 const mockedResponse: StatusResponse = {

src/core/server/core_usage_data/core_usage_data_service.test.ts

@@ -20,7 +20,7 @@ import { config as RawElasticsearchConfig } from '@kbn/core-elasticsearch-server
 import { config as RawHttpConfig } from '@kbn/core-http-server-internal';
 import { savedObjectsConfig as RawSavedObjectsConfig } from '../saved_objects/saved_objects_config';
 import { httpServiceMock } from '@kbn/core-http-server-mocks';
-import { metricsServiceMock } from '../metrics/metrics_service.mock';
+import { metricsServiceMock } from '@kbn/core-metrics-server-mocks';
 import { savedObjectsServiceMock } from '../saved_objects/saved_objects_service.mock';
 
 import { CoreUsageDataService } from './core_usage_data_service';

src/core/server/core_usage_data/core_usage_data_service.ts

@@ -22,6 +22,7 @@ import type { Logger } from '@kbn/logging';
 import type { HttpConfigType, InternalHttpServiceSetup } from '@kbn/core-http-server-internal';
 import type { ElasticsearchServiceStart } from '@kbn/core-elasticsearch-server';
 import type { ElasticsearchConfigType } from '@kbn/core-elasticsearch-server-internal';
+import type { MetricsServiceSetup, OpsMetrics } from '@kbn/core-metrics-server';
 import { SavedObjectsServiceStart, SavedObjectTypeRegistry } from '..';
 
 import { SavedObjectsConfigType } from '../saved_objects/saved_objects_config';
@@ -38,7 +39,6 @@ import { coreUsageStatsType } from './core_usage_stats';
 import { LEGACY_URL_ALIAS_TYPE } from '../saved_objects/object_types';
 import { CORE_USAGE_STATS_TYPE } from './constants';
 import { CoreUsageStatsClient } from './core_usage_stats_client';
-import { MetricsServiceSetup, OpsMetrics } from '..';
 import { CoreIncrementUsageCounter } from './types';
 
 export type ExposedConfigsToUsage = Map<string, Record<string, boolean>>;

src/core/server/index.ts

@@ -52,7 +52,8 @@ import type {
   HttpServiceStart,
 } from '@kbn/core-http-server';
 import type { PrebootServicePreboot } from '@kbn/core-preboot-server';
-import type {
+import type { MetricsServiceSetup, MetricsServiceStart } from '@kbn/core-metrics-server';
+import {
   ElasticsearchServiceSetup,
   ElasticsearchServiceStart,
   ElasticsearchServicePreboot,
@@ -64,7 +65,6 @@ import { HttpResources } from './http_resources';
 import { PluginsServiceSetup, PluginsServiceStart, PluginOpaqueId } from './plugins';
 import { UiSettingsServiceSetup, UiSettingsServiceStart } from './ui_settings';
 import { SavedObjectsServiceSetup, SavedObjectsServiceStart } from './saved_objects';
-import { MetricsServiceSetup, MetricsServiceStart } from './metrics';
 import { StatusServiceSetup } from './status';
 import { CoreUsageDataStart, CoreUsageDataSetup } from './core_usage_data';
 import { I18nServiceSetup } from './i18n';
@@ -402,8 +402,9 @@ export type {
   MetricsServiceSetup,
   MetricsServiceStart,
   IntervalHistogram,
-} from './metrics';
+  IEventLoopDelaysMonitor,
-export { EventLoopDelaysMonitor } from './metrics';
+} from '@kbn/core-metrics-server';
+export { EventLoopDelaysMonitor } from '@kbn/core-metrics-collectors-server-internal';
 
 export type { I18nServiceSetup } from './i18n';
 export type {

src/core/server/integration_tests/metrics/server_collector.test.ts

@@ -15,7 +15,7 @@ import type { IRouter } from '@kbn/core-http-server';
 import { contextServiceMock } from '@kbn/core-http-context-server-mocks';
 import type { HttpService } from '@kbn/core-http-server-internal';
 import { executionContextServiceMock } from '@kbn/core-execution-context-server-mocks';
-import { ServerMetricsCollector } from '../../metrics/collectors/server';
+import { ServerMetricsCollector } from '@kbn/core-metrics-collectors-server-internal';
 import { setTimeout as setTimeoutPromise } from 'timers/promises';
 
 describe('ServerMetricsCollector', () => {

src/core/server/integration_tests/status/routes/status.test.ts

@@ -13,8 +13,8 @@ import { omit } from 'lodash';
 import { ContextService } from '@kbn/core-http-context-server-internal';
 import { createCoreContext, createHttpServer } from '@kbn/core-http-server-mocks';
 import type { HttpService, InternalHttpServiceSetup } from '@kbn/core-http-server-internal';
-import { metricsServiceMock } from '../../../metrics/metrics_service.mock';
+import { metricsServiceMock } from '@kbn/core-metrics-server-mocks';
-import type { MetricsServiceSetup } from '../../../metrics';
+import type { MetricsServiceSetup } from '@kbn/core-metrics-server';
 
 import { registerStatusRoute } from '../../../status/routes/status';
 import { ServiceStatus, ServiceStatusLevels, ServiceStatusLevel } from '../../../status/types';

src/core/server/internal_types.ts

@@ -32,6 +32,10 @@ import type {
   InternalHttpServiceStart,
 } from '@kbn/core-http-server-internal';
 import type {
+  InternalMetricsServiceSetup,
+  InternalMetricsServiceStart,
+} from '@kbn/core-metrics-server-internal';
+import {
   InternalElasticsearchServicePreboot,
   InternalElasticsearchServiceSetup,
   InternalElasticsearchServiceStart,
@@ -46,7 +50,6 @@ import {
   InternalUiSettingsServiceSetup,
   InternalUiSettingsServiceStart,
 } from './ui_settings';
-import { InternalMetricsServiceSetup, InternalMetricsServiceStart } from './metrics';
 import { InternalRenderingServiceSetup } from './rendering';
 import { InternalHttpResourcesPreboot, InternalHttpResourcesSetup } from './http_resources';
 import { InternalStatusServiceSetup } from './status';

src/core/server/metrics/index.ts

@@ -1,21 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License
- * 2.0 and the Server Side Public License, v 1; you may not use this file except
- * in compliance with, at your election, the Elastic License 2.0 or the Server
- * Side Public License, v 1.
- */
-
-export type {
-  InternalMetricsServiceStart,
-  InternalMetricsServiceSetup,
-  MetricsServiceSetup,
-  MetricsServiceStart,
-  OpsMetrics,
-  IntervalHistogram,
-} from './types';
-export type { OpsProcessMetrics, OpsServerMetrics, OpsOsMetrics } from './collectors';
-export { MetricsService } from './metrics_service';
-export { opsConfig } from './ops_config';
-export type { OpsConfigType } from './ops_config';
-export { EventLoopDelaysMonitor } from './event_loop_delays';

src/core/server/metrics/ops_config.ts

@@ -1,22 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License
- * 2.0 and the Server Side Public License, v 1; you may not use this file except
- * in compliance with, at your election, the Elastic License 2.0 or the Server
- * Side Public License, v 1.
- */
-
-import { schema, TypeOf } from '@kbn/config-schema';
-
-export const opsConfig = {
-  path: 'ops',
-  schema: schema.object({
-    interval: schema.duration({ defaultValue: '5s' }),
-    cGroupOverrides: schema.object({
-      cpuPath: schema.maybe(schema.string()),
-      cpuAcctPath: schema.maybe(schema.string()),
-    }),
-  }),
-};
-
-export type OpsConfigType = TypeOf<typeof opsConfig.schema>;

src/core/server/metrics/types.ts

@@ -1,104 +0,0 @@
-/*
- * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
- * or more contributor license agreements. Licensed under the Elastic License
- * 2.0 and the Server Side Public License, v 1; you may not use this file except
- * in compliance with, at your election, the Elastic License 2.0 or the Server
- * Side Public License, v 1.
- */
-
-import { Observable } from 'rxjs';
-import type { OpsProcessMetrics, OpsOsMetrics, OpsServerMetrics } from './collectors';
-
-/**
- * APIs to retrieves metrics gathered and exposed by the core platform.
- *
- * @public
- */
-export interface MetricsServiceSetup {
-  /** Interval metrics are collected in milliseconds */
-  readonly collectionInterval: number;
-
-  /**
-   * Retrieve an observable emitting the {@link OpsMetrics} gathered.
-   * The observable will emit an initial value during core's `start` phase, and a new value every fixed interval of time,
-   * based on the `opts.interval` configuration property.
-   *
-   * @example
-   * ```ts
-   * core.metrics.getOpsMetrics$().subscribe(metrics => {
-   *   // do something with the metrics
-   * })
-   * ```
-   */
-  getOpsMetrics$: () => Observable<OpsMetrics>;
-}
-/**
- * {@inheritdoc MetricsServiceSetup}
- *
- * @public
- */
-export type MetricsServiceStart = MetricsServiceSetup;
-
-export type InternalMetricsServiceSetup = MetricsServiceSetup;
-export type InternalMetricsServiceStart = MetricsServiceStart;
-
-/**
- * Regroups metrics gathered by all the collectors.
- * This contains metrics about the os/runtime, the kibana process and the http server.
- *
- * @public
- */
-export interface OpsMetrics {
-  /** Time metrics were recorded at. */
-  collected_at: Date;
-  /**
-   * Process related metrics.
-   * @deprecated use the processes field instead.
-   * @removeBy 8.8.0
-   */
-  process: OpsProcessMetrics;
-  /** Process related metrics. Reports an array of objects for each kibana pid.*/
-  processes: OpsProcessMetrics[];
-  /** OS related metrics */
-  os: OpsOsMetrics;
-  /** server response time stats */
-  response_times: OpsServerMetrics['response_times'];
-  /** server requests stats */
-  requests: OpsServerMetrics['requests'];
-  /** number of current concurrent connections to the server */
-  concurrent_connections: OpsServerMetrics['concurrent_connections'];
-}
-
-/**
- * an IntervalHistogram object that samples and reports the event loop delay over time.
- * The delays will be reported in milliseconds.
- *
- * @public
- */
-export interface IntervalHistogram {
-  // The first timestamp the interval timer kicked in for collecting data points.
-  fromTimestamp: string;
-  // Last timestamp the interval timer kicked in for collecting data points.
-  lastUpdatedAt: string;
-  // The minimum recorded event loop delay.
-  min: number;
-  // The maximum recorded event loop delay.
-  max: number;
-  // The mean of the recorded event loop delays.
-  mean: number;
-  // The number of times the event loop delay exceeded the maximum 1 hour event loop delay threshold.
-  exceeds: number;
-  // The standard deviation of the recorded event loop delays.
-  stddev: number;
-  // An object detailing the accumulated percentile distribution.
-  percentiles: {
-    // 50th percentile of delays of the collected data points.
-    50: number;
-    // 75th percentile of delays of the collected data points.
-    75: number;
-    // 95th percentile of delays of the collected data points.
-    95: number;
-    // 99th percentile of delays of the collected data points.
-    99: number;
-  };
-}

src/core/server/mocks.ts

@@ -21,6 +21,7 @@ import { prebootServiceMock } from '@kbn/core-preboot-server-mocks';
 import { contextServiceMock } from '@kbn/core-http-context-server-mocks';
 import { httpServiceMock } from '@kbn/core-http-server-mocks';
 import { elasticsearchServiceMock } from '@kbn/core-elasticsearch-server-mocks';
+import { metricsServiceMock } from '@kbn/core-metrics-server-mocks';
 import { capabilitiesServiceMock } from '@kbn/core-capabilities-server-mocks';
 import type {
   PluginInitializerContext,
@@ -37,7 +38,6 @@ import { typeRegistryMock as savedObjectsTypeRegistryMock } from './saved_object
 import { renderingMock } from './rendering/rendering_service.mock';
 import { uiSettingsServiceMock } from './ui_settings/ui_settings_service.mock';
 import { SharedGlobalConfig } from './plugins';
-import { metricsServiceMock } from './metrics/metrics_service.mock';
 import { statusServiceMock } from './status/status_service.mock';
 import { coreUsageDataServiceMock } from './core_usage_data/core_usage_data_service.mock';
 import { i18nServiceMock } from './i18n/i18n_service.mock';
@@ -54,7 +54,7 @@ export { savedObjectsClientMock } from './saved_objects/service/saved_objects_cl
 export { migrationMocks } from './saved_objects/migrations/mocks';
 export { typeRegistryMock as savedObjectsTypeRegistryMock } from './saved_objects/saved_objects_type_registry.mock';
 export { uiSettingsServiceMock } from './ui_settings/ui_settings_service.mock';
-export { metricsServiceMock } from './metrics/metrics_service.mock';
+export { metricsServiceMock } from '@kbn/core-metrics-server-mocks';
 export { renderingMock } from './rendering/rendering_service.mock';
 export { statusServiceMock } from './status/status_service.mock';
 export { contextServiceMock } from '@kbn/core-http-context-server-mocks';

src/core/server/server.test.mocks.ts

@@ -82,10 +82,10 @@ jest.doMock('@kbn/core-node-server-internal', () => ({
   NodeService: jest.fn(() => mockNodeService),
 }));
 
-import { metricsServiceMock } from './metrics/metrics_service.mock';
+import { metricsServiceMock } from '@kbn/core-metrics-server-mocks';
 
 export const mockMetricsService = metricsServiceMock.create();
-jest.doMock('./metrics/metrics_service', () => ({
+jest.doMock('@kbn/core-metrics-server-internal', () => ({
   MetricsService: jest.fn(() => mockMetricsService),
 }));
 

src/core/server/server.ts

@@ -41,6 +41,7 @@ import {
   ElasticsearchService,
   config as elasticsearchConfig,
 } from '@kbn/core-elasticsearch-server-internal';
+import { MetricsService, opsConfig } from '@kbn/core-metrics-server-internal';
 import { CapabilitiesService } from '@kbn/core-capabilities-server-internal';
 import { CoreApp } from './core_app';
 import { I18nService } from './i18n';
@@ -49,7 +50,6 @@ import { RenderingService } from './rendering';
 import { UiSettingsService } from './ui_settings';
 import { PluginsService, config as pluginsConfig } from './plugins';
 import { SavedObjectsService, SavedObjectsServiceStart } from './saved_objects';
-import { MetricsService, opsConfig } from './metrics';
 // do not try to shorten the import to `./status`, it will break server test mocking
 import { StatusService } from './status/status_service';
 

src/core/server/status/routes/status.ts

@@ -12,7 +12,7 @@ import { PackageInfo } from '@kbn/config';
 
 import type { PluginName } from '@kbn/core-base-common';
 import type { IRouter } from '@kbn/core-http-server';
-import { MetricsServiceSetup } from '../../metrics';
+import type { MetricsServiceSetup } from '@kbn/core-metrics-server';
 import type { CoreIncrementUsageCounter } from '../../core_usage_data/types';
 import { ServiceStatus, CoreStatus, ServiceStatusLevels } from '../types';
 import { calculateLegacyStatus, LegacyStatusInfo } from '../legacy_status';

src/core/server/status/status_service.test.ts

@@ -21,7 +21,7 @@ import { environmentServiceMock } from '@kbn/core-environment-server-mocks';
 import { mockRouter, RouterMock } from '@kbn/core-http-router-server-mocks';
 import { httpServiceMock } from '@kbn/core-http-server-mocks';
 import { ServiceStatusLevelSnapshotSerializer } from './test_utils';
-import { metricsServiceMock } from '../metrics/metrics_service.mock';
+import { metricsServiceMock } from '@kbn/core-metrics-server-mocks';
 import { configServiceMock } from '@kbn/config-mocks';
 import { coreUsageDataServiceMock } from '../core_usage_data/core_usage_data_service.mock';
 import { analyticsServiceMock } from '@kbn/core-analytics-server-mocks';

src/core/server/status/status_service.ts

@@ -26,8 +26,8 @@ import type { AnalyticsServiceSetup } from '@kbn/core-analytics-server';
 import type { InternalEnvironmentServiceSetup } from '@kbn/core-environment-server-internal';
 import type { InternalHttpServiceSetup } from '@kbn/core-http-server-internal';
 import type { InternalElasticsearchServiceSetup } from '@kbn/core-elasticsearch-server-internal';
+import type { InternalMetricsServiceSetup } from '@kbn/core-metrics-server-internal';
 import { InternalSavedObjectsServiceSetup } from '../saved_objects';
-import { InternalMetricsServiceSetup } from '../metrics';
 import { registerStatusRoute } from './routes';
 import type { InternalCoreUsageDataSetup } from '../core_usage_data';
 

src/plugins/kibana_usage_collection/server/collectors/event_loop_delays/track_delays.ts

@@ -9,7 +9,7 @@
 import { takeUntil, finalize, map } from 'rxjs/operators';
 import { Observable, timer } from 'rxjs';
 import type { ISavedObjectsRepository } from '@kbn/core/server';
-import type { EventLoopDelaysMonitor } from '@kbn/core/server';
+import type { IEventLoopDelaysMonitor, IntervalHistogram } from '@kbn/core/server';
 import {
   MONITOR_EVENT_LOOP_DELAYS_START,
   MONITOR_EVENT_LOOP_DELAYS_INTERVAL,
@@ -27,7 +27,7 @@ export function startTrackingEventLoopDelaysUsage(
   internalRepository: ISavedObjectsRepository,
   instanceUuid: string,
   stopMonitoringEventLoop$: Observable<void>,
-  eventLoopDelaysMonitor: EventLoopDelaysMonitor,
+  eventLoopDelaysMonitor: IEventLoopDelaysMonitor<IntervalHistogram>,
   configs: {
     collectionStartDelay?: number;
     collectionInterval?: number;

src/plugins/kibana_usage_collection/server/collectors/event_loop_delays/track_threshold.ts

@@ -10,7 +10,7 @@ import { takeUntil, finalize } from 'rxjs/operators';
 import { Observable, timer } from 'rxjs';
 import type { Logger } from '@kbn/core/server';
 import type { UsageCounter } from '@kbn/usage-collection-plugin/server';
-import type { EventLoopDelaysMonitor } from '@kbn/core/server';
+import type { IEventLoopDelaysMonitor, IntervalHistogram } from '@kbn/core/server';
 import {
   MONITOR_EVENT_LOOP_THRESHOLD_START,
   MONITOR_EVENT_LOOP_THRESHOLD_INTERVAL,
@@ -27,7 +27,7 @@ export function startTrackingEventLoopDelaysThreshold(
   eventLoopCounter: UsageCounter,
   logger: Logger,
   stopMonitoringEventLoop$: Observable<void>,
-  eventLoopDelaysMonitor: EventLoopDelaysMonitor,
+  eventLoopDelaysMonitor: IEventLoopDelaysMonitor<IntervalHistogram>,
   configs: {
     warnThreshold?: number;
     collectionStartDelay?: number;

src/plugins/usage_collection/server/routes/index.ts

@@ -9,7 +9,7 @@
 import {
   IRouter,
   ISavedObjectsRepository,
-  MetricsServiceSetup,
+  type MetricsServiceSetup,
   ServiceStatus,
 } from '@kbn/core/server';
 import { Observable } from 'rxjs';

src/plugins/usage_collection/server/routes/integration_tests/stats.test.ts

@@ -9,7 +9,7 @@
 import { BehaviorSubject } from 'rxjs';
 
 import {
-  MetricsServiceSetup,
+  type MetricsServiceSetup,
   RequestHandlerContext,
   ServiceStatus,
   ServiceStatusLevels,

src/plugins/usage_collection/server/routes/stats/stats.ts

@@ -14,7 +14,7 @@ import { firstValueFrom, Observable } from 'rxjs';
 import {
   ElasticsearchClient,
   IRouter,
-  MetricsServiceSetup,
+  type MetricsServiceSetup,
   SavedObjectsClientContract,
   ServiceStatus,
   ServiceStatusLevels,

yarn.lock

@@ -3299,6 +3299,26 @@
   version "0.0.0"
   uid ""
 
+"@kbn/core-metrics-collectors-server-internal@link:bazel-bin/packages/core/metrics/core-metrics-collectors-server-internal":
+  version "0.0.0"
+  uid ""
+
+"@kbn/core-metrics-collectors-server-mocks@link:bazel-bin/packages/core/metrics/core-metrics-collectors-server-mocks":
+  version "0.0.0"
+  uid ""
+
+"@kbn/core-metrics-server-internal@link:bazel-bin/packages/core/metrics/core-metrics-server-internal":
+  version "0.0.0"
+  uid ""
+
+"@kbn/core-metrics-server-mocks@link:bazel-bin/packages/core/metrics/core-metrics-server-mocks":
+  version "0.0.0"
+  uid ""
+
+"@kbn/core-metrics-server@link:bazel-bin/packages/core/metrics/core-metrics-server":
+  version "0.0.0"
+  uid ""
+
 "@kbn/core-node-server-internal@link:bazel-bin/packages/core/node/core-node-server-internal":
   version "0.0.0"
   uid ""
@@ -7019,6 +7039,26 @@
   version "0.0.0"
   uid ""
 
+"@types/kbn__core-metrics-collectors-server-internal@link:bazel-bin/packages/core/metrics/core-metrics-collectors-server-internal/npm_module_types":
+  version "0.0.0"
+  uid ""
+
+"@types/kbn__core-metrics-collectors-server-mocks@link:bazel-bin/packages/core/metrics/core-metrics-collectors-server-mocks/npm_module_types":
+  version "0.0.0"
+  uid ""
+
+"@types/kbn__core-metrics-server-internal@link:bazel-bin/packages/core/metrics/core-metrics-server-internal/npm_module_types":
+  version "0.0.0"
+  uid ""
+
+"@types/kbn__core-metrics-server-mocks@link:bazel-bin/packages/core/metrics/core-metrics-server-mocks/npm_module_types":
+  version "0.0.0"
+  uid ""
+
+"@types/kbn__core-metrics-server@link:bazel-bin/packages/core/metrics/core-metrics-server/npm_module_types":
+  version "0.0.0"
+  uid ""
+
 "@types/kbn__core-node-server-internal@link:bazel-bin/packages/core/node/core-node-server-internal/npm_module_types":
   version "0.0.0"
   uid ""