76cc01f6b5
Adds support for Jaeger next to Zipkin as a trace target. ## Bug - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Errors have helpful link attached, see `contributing.md` ## Feature - [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR. - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Documentation added - [ ] Telemetry added. In case of a feature if it's used or not. - [ ] Errors have helpful link attached, see `contributing.md` ## Documentation / Examples - [ ] Make sure the linting passes
90 lines
2.2 KiB
TypeScript
90 lines
2.2 KiB
TypeScript
import retry from 'next/dist/compiled/async-retry'
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import { randomBytes } from 'crypto'
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import fetch from 'node-fetch'
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import * as Log from '../../../build/output/log'
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let traceId = process.env.TRACE_ID
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let batch: ReturnType<typeof batcher> | undefined
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const localEndpoint = {
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serviceName: 'nextjs',
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ipv4: '127.0.0.1',
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port: 9411,
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}
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// Jaeger supports Zipkin's reporting API
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const zipkinUrl = `http://${localEndpoint.ipv4}:${localEndpoint.port}`
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const jaegerWebUiUrl = `http://${localEndpoint.ipv4}:16686`
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const zipkinAPI = `${zipkinUrl}/api/v2/spans`
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type Event = {
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traceId: string
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parentId?: string
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name: string
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id: string
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timestamp: number
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duration: number
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localEndpoint: typeof localEndpoint
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tags?: Object
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}
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// Batch events as zipkin allows for multiple events to be sent in one go
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function batcher(reportEvents: (evts: Event[]) => void) {
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const events: Event[] = []
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let timeout: ReturnType<typeof setTimeout> | undefined
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return (event: Event) => {
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events.push(event)
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// setTimeout is used instead of setInterval to ensure events sending does not block exiting the program
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if (!timeout) {
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timeout = setTimeout(() => {
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reportEvents(events.slice())
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events.length = 0
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timeout = undefined
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}, 1500)
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}
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}
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}
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const reportToLocalHost = (
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name: string,
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duration: number,
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timestamp: number,
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id: string,
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parentId?: string,
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attrs?: Object
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) => {
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if (!traceId) {
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traceId = process.env.TRACE_ID = randomBytes(8).toString('hex')
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Log.info(
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`Jaeger trace will be available on ${jaegerWebUiUrl}/trace/${traceId}`
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)
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}
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if (!batch) {
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batch = batcher((events) => {
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// Ensure ECONNRESET error is retried 3 times before erroring out
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retry(
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() =>
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// Send events to zipkin
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fetch(zipkinAPI, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify(events),
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}),
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{ minTimeout: 500, retries: 3, factor: 1 }
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).catch(console.log)
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})
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}
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batch({
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traceId,
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parentId,
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name,
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id,
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timestamp,
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duration,
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localEndpoint,
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tags: attrs,
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})
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}
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export default reportToLocalHost
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