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183 changes: 183 additions & 0 deletions
183
packages/elastic-apm-synthtrace/src/lib/apm/aggregators/service_latency_aggregator.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,183 @@ | ||
| /* | ||
| * 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 { random } from 'lodash'; | ||
| import { Client } from '@elastic/elasticsearch'; | ||
| import { ApmFields } from '../apm_fields'; | ||
| import { Fields } from '../../entity'; | ||
| import { StreamAggregator } from '../../stream_aggregator'; | ||
|
|
||
| type LatencyState = { | ||
| count: number; | ||
| min: number; | ||
| max: number; | ||
| sum: number; | ||
| timestamp: number; | ||
| } & Pick<ApmFields, 'service.name' | 'service.environment' | 'transaction.type'>; | ||
|
|
||
| export type ServiceFields = Fields & | ||
| Pick< | ||
| ApmFields, | ||
| | 'timestamp.us' | ||
| | 'ecs.version' | ||
| | 'metricset.name' | ||
| | 'observer' | ||
| | 'processor.event' | ||
| | 'processor.name' | ||
| | 'service.name' | ||
| | 'service.version' | ||
| | 'service.environment' | ||
| | 'transaction.type' | ||
| > & | ||
| Partial<{ | ||
| 'transaction.duration.aggregate': { | ||
| min: number; | ||
| max: number; | ||
| sum: number; | ||
| value_count: number; | ||
| }; | ||
| }>; | ||
|
|
||
| export class ServiceLatencyAggregator implements StreamAggregator<ApmFields> { | ||
| public readonly name; | ||
|
|
||
| constructor() { | ||
| this.name = 'service-latency'; | ||
| } | ||
|
|
||
| getDataStreamName(): string { | ||
| return 'metrics-apm.service'; | ||
| } | ||
|
|
||
| getMappings(): Record<string, any> { | ||
| return { | ||
| properties: { | ||
| '@timestamp': { | ||
| type: 'date', | ||
| format: 'date_optional_time||epoch_millis', | ||
| }, | ||
| transaction: { | ||
| type: 'object', | ||
| properties: { | ||
| type: { type: 'keyword', time_series_dimension: true }, | ||
| duration: { | ||
| type: 'object', | ||
| properties: { | ||
| aggregate: { | ||
| type: 'aggregate_metric_double', | ||
| metrics: ['min', 'max', 'sum', 'value_count'], | ||
| default_metric: 'sum', | ||
| time_series_metric: 'gauge', | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| service: { | ||
| type: 'object', | ||
| properties: { | ||
| name: { type: 'keyword', time_series_dimension: true }, | ||
| environment: { type: 'keyword', time_series_dimension: true }, | ||
| }, | ||
| }, | ||
| }, | ||
| }; | ||
| } | ||
|
|
||
| getDimensions(): string[] { | ||
| return ['service.name', 'service.environment', 'transaction.type']; | ||
| } | ||
|
|
||
| getWriteTarget(document: Record<string, any>): string | null { | ||
| const eventType = document.metricset?.name; | ||
| if (eventType === 'service') return 'metrics-apm.service-default'; | ||
| return null; | ||
| } | ||
|
|
||
| private state: Record<string, LatencyState> = {}; | ||
|
|
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| private processedComponent: number = 0; | ||
|
|
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| process(event: ApmFields): Fields[] | null { | ||
| if (!event['@timestamp']) return null; | ||
| const service = event['service.name']!; | ||
| const environment = event['service.environment'] ?? 'production'; | ||
| const transactionType = event['transaction.type'] ?? 'request'; | ||
| const key = `${service}-${environment}-${transactionType}`; | ||
| const addToState = (timestamp: number) => { | ||
| if (!this.state[key]) { | ||
| this.state[key] = { | ||
| timestamp, | ||
| count: 0, | ||
| min: 0, | ||
| max: 0, | ||
| sum: 0, | ||
| 'service.name': service, | ||
| 'service.environment': environment, | ||
| 'transaction.type': transactionType, | ||
| }; | ||
| } | ||
| const duration = Number(event['transaction.duration.us']); | ||
| if (duration >= 0) { | ||
| const state = this.state[key]; | ||
|
|
||
| state.count++; | ||
| state.sum += duration; | ||
| if (duration > state.max) state.max = duration; | ||
| if (duration < state.min) state.min = Math.min(0, duration); | ||
| } | ||
| }; | ||
|
|
||
| // ensure we flush current state first if event falls out of the current max window age | ||
| if (this.state[key]) { | ||
| const diff = Math.abs(event['@timestamp'] - this.state[key].timestamp); | ||
| if (diff >= 1000 * 60) { | ||
| const fields = this.createServiceFields(key); | ||
| delete this.state[key]; | ||
| addToState(event['@timestamp']); | ||
| return [fields]; | ||
| } | ||
| } | ||
|
|
||
| addToState(event['@timestamp']); | ||
| // if cardinality is too high force emit of current state | ||
| if (Object.keys(this.state).length === 1000) { | ||
| return this.flush(); | ||
| } | ||
|
|
||
| return null; | ||
| } | ||
|
|
||
| flush(): Fields[] { | ||
| const fields = Object.keys(this.state).map((key) => this.createServiceFields(key)); | ||
| this.state = {}; | ||
| return fields; | ||
| } | ||
|
|
||
| private createServiceFields(key: string): ServiceFields { | ||
| this.processedComponent = ++this.processedComponent % 1000; | ||
| const component = Date.now() % 100; | ||
| const state = this.state[key]; | ||
| return { | ||
| '@timestamp': state.timestamp + random(0, 100) + component + this.processedComponent, | ||
| 'metricset.name': 'service', | ||
| 'processor.event': 'metric', | ||
| 'service.name': state['service.name'], | ||
| 'service.environment': state['service.environment'], | ||
| 'transaction.type': state['transaction.type'], | ||
| 'transaction.duration.aggregate': { | ||
| min: state.min, | ||
| max: state.max, | ||
| sum: state.sum, | ||
| value_count: state.count, | ||
| }, | ||
| }; | ||
| } | ||
|
|
||
| async bootstrapElasticsearch(esClient: Client): Promise<void> {} | ||
| } |
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