Implement HTTP API versioned types in usage collection plugin

src/plugins/usage_collection/common/types/index.ts

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+/*
+ * 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 * as Stats from './stats';
+export * as UiCounters from './ui_counters';
+export * as UsageCounters from './usage_counters';

src/plugins/usage_collection/common/types/stats/core_metrics.ts

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+/*
+ * 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.
+ */
+
+/**
+ * The types are exact duplicates of the ops metrics types declared in core needed for reporting in the stats api.
+ * We use a copy of these to detect changes in the ops metrics reported from core
+ * See packages/core/metrics/core-metrics-server/index.ts
+ */
+
+/**
+ * an IntervalHistogram object that samples and reports the event loop delay over time.
+ * The delays will be reported in milliseconds.
+ * See {@link IntervalHistogram}
+ * @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;
+  };
+}
+
+/**
+ * See {@link ElasticsearchClientProtocol}
+ * Protocol(s) used by the Elasticsearch Client
+ * @public
+ */
+
+export type ElasticsearchClientProtocol = 'none' | 'http' | 'https' | 'mixed';
+
+/**
+ * See {@link ElasticsearchClientsMetrics}
+ * Metrics related to the elasticsearch clients
+ * @public
+ */
+export interface ElasticsearchClientsMetrics {
+  /** Total number of active sockets (all nodes, all connections) */
+  totalActiveSockets: number;
+  /** Total number of available sockets (alive but idle, all nodes, all connections) */
+  totalIdleSockets: number;
+  /** Total number of queued requests (all nodes, all connections) */
+  totalQueuedRequests: number;
+}
+
+/**
+ * See {@link OpsProcessMetrics}
+ * Process related metrics
+ * @public
+ */
+export interface OpsProcessMetrics {
+  /** pid of the kibana process */
+  pid: number;
+  /** process memory usage */
+  memory: {
+    /** heap memory usage */
+    heap: {
+      /** total heap available */
+      total_in_bytes: number;
+      /** used heap */
+      used_in_bytes: number;
+      /** v8 heap size limit */
+      size_limit: number;
+    };
+    /** node rss */
+    resident_set_size_in_bytes: number;
+  };
+  /** mean event loop delay since last collection*/
+  event_loop_delay: number;
+  /** node event loop delay histogram since last collection */
+  event_loop_delay_histogram: IntervalHistogram;
+  /** uptime of the kibana process */
+  uptime_in_millis: number;
+}
+
+/**
+ * See {@link OpsOsMetrics}
+ * OS related metrics
+ * @public
+ */
+export interface OpsOsMetrics {
+  /** The os platform */
+  platform: NodeJS.Platform;
+  /** The os platform release, prefixed by the platform name */
+  platformRelease: string;
+  /** The os distrib. Only present for linux platforms */
+  distro?: string;
+  /** The os distrib release, prefixed by the os distrib. Only present for linux platforms */
+  distroRelease?: string;
+  /** cpu load metrics */
+  load: {
+    /** load for last minute */
+    '1m': number;
+    /** load for last 5 minutes */
+    '5m': number;
+    /** load for last 15 minutes */
+    '15m': number;
+  };
+  /** system memory usage metrics */
+  memory: {
+    /** total memory available */
+    total_in_bytes: number;
+    /** current free memory */
+    free_in_bytes: number;
+    /** current used memory */
+    used_in_bytes: number;
+  };
+  /** the OS uptime */
+  uptime_in_millis: number;
+
+  /** cpu accounting metrics, undefined when not running in a cgroup */
+  cpuacct?: {
+    /** name of this process's cgroup */
+    control_group: string;
+    /** cpu time used by this process's cgroup */
+    usage_nanos: number;
+  };
+
+  /** cpu cgroup metrics, undefined when not running in a cgroup */
+  cpu?: {
+    /** name of this process's cgroup */
+    control_group: string;
+    /** the length of the cfs period */
+    cfs_period_micros: number;
+    /** total available run-time within a cfs period */
+    cfs_quota_micros: number;
+    /** current stats on the cfs periods */
+    stat: {
+      /** number of cfs periods that elapsed */
+      number_of_elapsed_periods: number;
+      /** number of times the cgroup has been throttled */
+      number_of_times_throttled: number;
+      /** total amount of time the cgroup has been throttled for */
+      time_throttled_nanos: number;
+    };
+  };
+}
+
+/**
+ * {@link OpsServerMetrics}
+ * server related metrics
+ * @public
+ */
+export interface OpsServerMetrics {
+  /** server response time stats */
+  response_times: {
+    /** average response time */
+    avg_in_millis: number;
+    /** maximum response time */
+    max_in_millis: number;
+  };
+  /** server requests stats */
+  requests: {
+    /** number of disconnected requests since startup */
+    disconnects: number;
+    /** total number of requests handled since startup */
+    total: number;
+    /** number of request handled per response status code */
+    statusCodes: Record<number, number>;
+  };
+  /** number of current concurrent connections to the server */
+  concurrent_connections: number;
+}
+
+/**
+ * {@link OpsMetrics}
+ * 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;
+  /**
+   * Metrics related to the elasticsearch client
+   */
+  elasticsearch_client: ElasticsearchClientsMetrics;
+  /**
+   * Process related metrics.
+   * @remarks processes field preferred
+   */
+  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'];
+}

src/plugins/usage_collection/common/types/stats/index.ts

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+/*
+ * 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 * as v1 from './v1';
+export * from './latest';

src/plugins/usage_collection/common/types/stats/latest.ts

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+/*
+ * 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 * as OpsMetricsCopy from './core_metrics';
+export * from './v1';

src/plugins/usage_collection/common/types/stats/v1.ts

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+/*
+ * 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 * as OpsMetricsCopy from './core_metrics';
+
+/** v1 types Start */
+/**
+ * stats query v1
+ * @remarks exclude_usage is always interpreted as true. query param retained to prevent breaking changes to existing consumers.
+ */
+export interface StatsHTTPQuery {
+  extended?: boolean | '';
+  legacy?: boolean | '';
+  exclude_usage?: boolean | '';
+}
+
+export interface UsageObject {
+  kibana?: UsageObject;
+  xpack?: UsageObject;
+  [key: string]: unknown | UsageObject;
+}
+
+export interface ClusterUuidLegacy {
+  clusterUuid?: string;
+}
+export interface ClusterUuid {
+  cluster_uuid?: string;
+}
+/**
+ * Extended usage stats.
+ * @remarks
+ * Legacy implementation used to conditionally include kibana usage metrics
+ * as of https://github.com/elastic/kibana/pull/151082, usage is no longer reported
+ * and set to an empty object to prevent breaking changes to existing consumers.
+ */
+export interface ExtendedStats {
+  [key: string]: unknown | UsageObject;
+  clusterUuid?: string; // camel case if legacy === true
+  cluster_uuid?: string; // snake_case if legacy === false
+}
+/**
+ * OpsMetrics: aliased from a duplicate of core's OpsMetrics types
+ * @remarks the alternative to creating a local copy of the OpsMetrics types is to declare them as `unknown` and assume validation happens elsewhere.
+ * The disadvantage is that any changes made to the original OpsMetrics will be passed through without needing to update the API types.
+ */
+export type LastOpsMetrics = OpsMetricsCopy.OpsMetrics;
+
+export type KibanaServiceStatus = Record<string, string>;
+/** explicitly typed stats for kibana */
+export interface KibanaStats {
+  // kibana
+  kibana: {
+    uuid: string;
+    name: string;
+    index: string;
+    host: string;
+    locale: string;
+    transport_address: string;
+    version: string;
+    snapshot: boolean;
+    status: string;
+  };
+}
+/** Stats response body */
+export type StatsHTTPBodyTyped = LastOpsMetrics | KibanaStats | ExtendedStats;

src/plugins/usage_collection/common/types/ui_counters/index.ts

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+/*
+ * 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 * as v1 from './v1';
+export * from './latest';

src/plugins/usage_collection/common/types/ui_counters/latest.ts

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+/*
+ * 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 * as v1 from './v1';