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feat: try and fix logs to include trace information #27

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Oct 28, 2024
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12 changes: 7 additions & 5 deletions package.json
Original file line number Diff line number Diff line change
Expand Up @@ -72,20 +72,21 @@
"dependencies": {
"@godaddy/terminus": "^4.12.1",
"@opentelemetry/api": "^1.9.0",
"@opentelemetry/exporter-prometheus": "^0.53.0",
"@opentelemetry/auto-instrumentations-node": "^0.51.0",
"@opentelemetry/exporter-prometheus": "^0.54.0",
"@opentelemetry/instrumentation-dns": "^0.39.0",
"@opentelemetry/instrumentation-express": "^0.43.0",
"@opentelemetry/instrumentation-generic-pool": "^0.39.0",
"@opentelemetry/instrumentation-graphql": "^0.43.0",
"@opentelemetry/instrumentation-http": "^0.53.0",
"@opentelemetry/instrumentation-http": "^0.54.0",
"@opentelemetry/instrumentation-ioredis": "^0.43.0",
"@opentelemetry/instrumentation-net": "^0.39.0",
"@opentelemetry/instrumentation-pg": "^0.46.0",
"@opentelemetry/instrumentation-pino": "^0.42.0",
"@opentelemetry/instrumentation-undici": "^0.6.0",
"@opentelemetry/resource-detector-container": "^0.4.4",
"@opentelemetry/resource-detector-gcp": "^0.29.12",
"@opentelemetry/sdk-node": "^0.53.0",
"@opentelemetry/sdk-node": "^0.54.0",
"@opentelemetry/semantic-conventions": "^1.27.0",
"@sesamecare-oss/confit": "^2.2.1",
"@sesamecare-oss/opentelemetry-node-metrics": "^1.1.0",
Expand All @@ -96,6 +97,7 @@
"express": "^5.0.1",
"express-openapi-validator": "^5.3.7",
"glob": "^11.0.0",
"import-in-the-middle": "^1.11.2",
"minimist": "^1.2.8",
"moderndash": "^3.12.0",
"pino": "^9.5.0",
Expand All @@ -113,12 +115,12 @@
"@types/cookie-parser": "^1.4.7",
"@types/express": "^5.0.0",
"@types/minimist": "^1.2.5",
"@types/node": "^22.7.7",
"@types/node": "^22.7.9",
"@types/request-ip": "^0.0.41",
"@types/supertest": "^6.0.2",
"@typescript-eslint/eslint-plugin": "^7.18.0",
"@typescript-eslint/parser": "^7.18.0",
"coconfig": "^1.6.0",
"coconfig": "^1.6.1",
"eslint": "^8.57.1",
"eslint-config-prettier": "^9.1.0",
"eslint-import-resolver-typescript": "^3.6.3",
Expand Down
4 changes: 4 additions & 0 deletions src/bin/start-service.ts
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,10 @@ const argv = minimist(process.argv.slice(2), {
boolean: ['built', 'repl', 'telemetry', 'nobind'],
});

if (argv.telemetry) {
await import('../telemetry/hook-modules.js');
}

const noTelemetry = (argv.repl || isDev()) && !argv.telemetry;
bootstrap({
...argv,
Expand Down
20 changes: 19 additions & 1 deletion src/express-app/app.ts
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ import path from 'path';

import { pino } from 'pino';
import cookieParser from 'cookie-parser';
import { metrics } from '@opentelemetry/api';
import { context, metrics, trace } from '@opentelemetry/api';
import { setupNodeMetrics } from '@sesamecare-oss/opentelemetry-node-metrics';
import { createTerminus } from '@godaddy/terminus';
import type { RequestHandler, Response } from 'express';
Expand Down Expand Up @@ -52,6 +52,22 @@ export async function startApp<
dest: process.env.LOG_TO_FILE || process.stdout.fd,
minLength: process.env.LOG_BUFFER ? Number(process.env.LOG_BUFFER) : undefined,
});

function poorMansOtlp(mergeObject: object) {
if (!('trace_id' in mergeObject)) {
const activeSpan = trace.getSpan(context.active());
if (activeSpan) {
const ctx = activeSpan.spanContext();
Object.assign(mergeObject, {
trace_id: ctx.traceId,
span_id: ctx.spanId,
trace_flags: ctx.traceFlags
});
}
}
return mergeObject;
}

const logger = shouldPrettyPrint
? pino(
{
Expand All @@ -61,6 +77,7 @@ export async function startApp<
colorize: true,
},
},
mixin: poorMansOtlp,
},
destination,
)
Expand All @@ -71,6 +88,7 @@ export async function startApp<
return { level: label };
},
},
mixin: poorMansOtlp,
},
destination,
);
Expand Down
18 changes: 18 additions & 0 deletions src/telemetry/hook-modules.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
import module from 'node:module';

module.register('import-in-the-middle/hook.mjs', import.meta.url, {
parentURL: import.meta.url,
data: {
include: [
'express',
'pino',
'http',
'dns',
'net',
'pg',
'ioredis',
'undici',
'generic-pool',
],
},
});
62 changes: 47 additions & 15 deletions src/telemetry/index.ts
Original file line number Diff line number Diff line change
@@ -1,9 +1,14 @@
import { OTLPLogExporter } from '@opentelemetry/exporter-logs-otlp-proto';
import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-proto';
import {
Detector,
DetectorSync,
envDetectorSync,
hostDetectorSync,
IResource,
osDetectorSync,
processDetectorSync,
ResourceDetectionConfig,
} from '@opentelemetry/resources';
import { containerDetector } from '@opentelemetry/resource-detector-container';
import { gcpDetector } from '@opentelemetry/resource-detector-gcp';
Expand All @@ -23,7 +28,7 @@ import type { ConfigurationSchema } from '../config/schema.js';
import { getAutoInstrumentations } from './instrumentations.js';
import { DummySpanExporter } from './DummyExporter.js';

function getExporter() {
function getSpanExporter() {
if (
!process.env.DISABLE_OLTP_EXPORTER &&
(['production', 'staging'].includes(process.env.APP_ENV || process.env.NODE_ENV || '') ||
Expand All @@ -39,9 +44,36 @@ function getExporter() {
return new DummySpanExporter();
}

function getLogExporter() {
if (
!process.env.DISABLE_OLTP_EXPORTER &&
(['production', 'staging'].includes(process.env.APP_ENV || process.env.NODE_ENV || '') ||
process.env.OTLP_EXPORTER)
) {
return new OTLPLogExporter({
url: process.env.OTLP_EXPORTER || 'http://otlp-exporter:4318/v1/logs',
});
}
if (process.env.ENABLE_CONSOLE_OLTP_EXPORTER) {
return new opentelemetry.logs.ConsoleLogRecordExporter();
}
return undefined;
}

let prometheusExporter: PrometheusExporter | undefined;
let telemetrySdk: opentelemetry.NodeSDK | undefined;

function awaitAttributes(detector: DetectorSync): Detector {
return {
async detect(config?: ResourceDetectionConfig): Promise<IResource> {
const resource = detector.detect(config)
await resource.waitForAsyncAttributes?.()

return resource
},
}
}

/**
* OpenTelemetry is not friendly to the idea of stopping
* and starting itself, it seems. So we can only keep a global
Expand All @@ -52,31 +84,31 @@ let telemetrySdk: opentelemetry.NodeSDK | undefined;
*/
export async function startGlobalTelemetry(serviceName: string) {
if (!prometheusExporter) {
// For troubleshooting, set the log level to DiagLogLevel.DEBUG
opentelemetry.api.diag.setLogger(new (opentelemetry.api.DiagConsoleLogger)(), opentelemetry.api.DiagLogLevel.INFO);
const { metrics, logs, NodeSDK } = opentelemetry;

prometheusExporter = new PrometheusExporter({ preventServerStart: true });
const instrumentations = getAutoInstrumentations();
telemetrySdk = new opentelemetry.NodeSDK({
const logExporter = getLogExporter();
telemetrySdk = new NodeSDK({
serviceName,
autoDetectResources: false,
traceExporter: getExporter(),
resourceDetectors: [
envDetectorSync,
hostDetectorSync,
osDetectorSync,
processDetectorSync,
containerDetector,
gcpDetector,
awaitAttributes(envDetectorSync),
awaitAttributes(hostDetectorSync),
awaitAttributes(osDetectorSync),
awaitAttributes(processDetectorSync),
awaitAttributes(containerDetector),
awaitAttributes(gcpDetector),
],
traceExporter: getSpanExporter(),
metricReader: prometheusExporter,
instrumentations,
logRecordProcessors: [],
logRecordProcessors: logExporter ? [new logs.BatchLogRecordProcessor(logExporter)] : [],
views: [
new opentelemetry.metrics.View({
new metrics.View({
instrumentName: 'http_request_duration_seconds',
instrumentType: opentelemetry.metrics.InstrumentType.HISTOGRAM,
aggregation: new opentelemetry.metrics.ExplicitBucketHistogramAggregation(
instrumentType: metrics.InstrumentType.HISTOGRAM,
aggregation: new metrics.ExplicitBucketHistogramAggregation(
[0.003, 0.03, 0.1, 0.3, 1.5, 10],
true,
),
Expand Down
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