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121 changes: 121 additions & 0 deletions
121
x-pack/plugins/security/server/elasticsearch/elasticsearch_service.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License; | ||
| * you may not use this file except in compliance with the Elastic License. | ||
| */ | ||
|
|
||
| import { BehaviorSubject, combineLatest, Observable } from 'rxjs'; | ||
| import { distinctUntilChanged, filter, map, shareReplay, tap } from 'rxjs/operators'; | ||
| import { | ||
| IClusterClient, | ||
| ICustomClusterClient, | ||
| Logger, | ||
| ServiceStatusLevels, | ||
| StatusServiceSetup, | ||
| ElasticsearchServiceSetup as CoreElasticsearchServiceSetup, | ||
| } from '../../../../../src/core/server'; | ||
| import { SecurityLicense } from '../../common/licensing'; | ||
| import { elasticsearchClientPlugin } from './elasticsearch_client_plugin'; | ||
|
|
||
| export interface ElasticsearchServiceSetupParams { | ||
| readonly elasticsearch: CoreElasticsearchServiceSetup; | ||
| readonly status: StatusServiceSetup; | ||
| readonly license: SecurityLicense; | ||
| } | ||
|
|
||
| export interface ElasticsearchServiceSetup { | ||
| readonly clusterClient: IClusterClient; | ||
| } | ||
|
|
||
| export interface ElasticsearchServiceStart { | ||
| readonly clusterClient: IClusterClient; | ||
| readonly watchOnlineStatus$: () => Observable<OnlineStatusRetryScheduler>; | ||
| } | ||
|
|
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| export interface OnlineStatusRetryScheduler { | ||
| scheduleRetry: () => void; | ||
| } | ||
|
|
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| export class ElasticsearchService { | ||
| private clusterClient?: ICustomClusterClient; | ||
| private coreStatus$!: Observable<boolean>; | ||
|
|
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| constructor(private readonly logger: Logger) {} | ||
|
|
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| setup({ | ||
| elasticsearch, | ||
| status, | ||
| license, | ||
| }: ElasticsearchServiceSetupParams): ElasticsearchServiceSetup { | ||
| this.clusterClient = elasticsearch.legacy.createClient('security', { | ||
| plugins: [elasticsearchClientPlugin], | ||
| }); | ||
|
|
||
| this.coreStatus$ = combineLatest([status.core$, license.features$]).pipe( | ||
| map( | ||
| ([coreStatus]) => | ||
| license.isEnabled() && coreStatus.elasticsearch.level === ServiceStatusLevels.available | ||
| ), | ||
| shareReplay(1) | ||
| ); | ||
|
|
||
| return { clusterClient: this.clusterClient }; | ||
| } | ||
|
|
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| start(): ElasticsearchServiceStart { | ||
| return { | ||
| clusterClient: this.clusterClient!, | ||
| watchOnlineStatus$: () => { | ||
| const RETRY_SCALE_DURATION = 100; | ||
| const RETRY_TIMEOUT_MAX = 10000; | ||
| const retries$ = new BehaviorSubject(0); | ||
|
|
||
| const retryScheduler = { | ||
| scheduleRetry: () => { | ||
| const retriesElapsed = retries$.getValue() + 1; | ||
| const nextRetryTimeout = Math.min( | ||
| retriesElapsed * RETRY_SCALE_DURATION, | ||
| RETRY_TIMEOUT_MAX | ||
| ); | ||
|
|
||
| this.logger.debug(`Scheduling re-try in ${nextRetryTimeout} ms.`); | ||
|
|
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| retryTimeout = setTimeout(() => retries$.next(retriesElapsed), nextRetryTimeout); | ||
| }, | ||
| }; | ||
|
|
||
| let retryTimeout: NodeJS.Timeout; | ||
| return combineLatest([ | ||
| this.coreStatus$.pipe( | ||
| tap(() => { | ||
| // If status or license change occurred before retry timeout we should cancel | ||
| // it and reset retry counter. | ||
| if (retryTimeout) { | ||
| clearTimeout(retryTimeout); | ||
| } | ||
|
|
||
| if (retries$.value > 0) { | ||
| retries$.next(0); | ||
| } | ||
| }) | ||
| ), | ||
| retries$.asObservable().pipe( | ||
| // We shouldn't emit new value if retry counter is reset. This comparator isn't called for | ||
| // the initial value. | ||
| distinctUntilChanged((prev, curr) => prev === curr || curr === 0) | ||
| ), | ||
| ]).pipe( | ||
| filter(([isAvailable]) => isAvailable), | ||
| map(() => retryScheduler) | ||
| ); | ||
| }, | ||
| }; | ||
| } | ||
|
|
||
| stop() { | ||
| if (this.clusterClient) { | ||
| this.clusterClient.close(); | ||
| this.clusterClient = undefined; | ||
| } | ||
| } | ||
| } |
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