Antoni Nuñez Romeu
1318243841
The resolved @opentelemetry/semantic-conventions version in CI does not export ATTR_SERVICE_NAMESPACE/ATTR_SERVICE_NAME as named exports, breaking the backend test import. Use plain 'service.name'/'service.namespace' string keys so the code is independent of the semantic-conventions version.
73 lines
2.7 KiB
JavaScript
73 lines
2.7 KiB
JavaScript
// OpenTelemetry Node SDK bootstrap for FarmaClic backend.
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// Started as a side-effect import from server.js (ESM).
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//
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// Env vars (set by docker-compose):
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// OTEL_SERVICE_NAME — default: farmaclic-backend
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// OTEL_EXPORTER_OTLP_ENDPOINT — OTLP gRPC endpoint (e.g. http://alloy:4317)
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//
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// Exports traces to the shared Grafana Alloy collector, where they are
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// routed to Tempo.
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import { NodeSDK } from '@opentelemetry/sdk-node';
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import { PeriodicExportingMetricReader } from '@opentelemetry/sdk-metrics';
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import { getNodeAutoInstrumentations } from '@opentelemetry/auto-instrumentations-node';
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import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-grpc';
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import { OTLPMetricExporter } from '@opentelemetry/exporter-metrics-otlp-grpc';
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import * as resources from '@opentelemetry/resources';
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import { PinoInstrumentation } from '@opentelemetry/instrumentation-pino';
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const serviceName = process.env.OTEL_SERVICE_NAME || 'farmaclic-backend';
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const otlpEndpoint = process.env.OTEL_EXPORTER_OTLP_ENDPOINT || 'http://localhost:4317';
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// Use plain string attribute keys (not the semantic-conventions named exports)
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// so we don't depend on a specific @opentelemetry/semantic-conventions version.
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const resource = typeof resources.resourceFromAttributes === 'function'
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? resources.resourceFromAttributes({
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'service.name': serviceName,
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'service.namespace': 'farmaclic',
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})
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: new resources.Resource({
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'service.name': serviceName,
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'service.namespace': 'farmaclic',
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});
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// Metrics → OTLP → Alloy → Prometheus remote_write. The PeriodicExportingMetricReader
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// makes the auto-instrumentations (http/express/redis) emit request duration/error
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// metrics with no extra code, on top of the custom business metrics in src/metrics.js.
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const metricReader = new PeriodicExportingMetricReader({
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exportIntervalMillis: 15_000,
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exporter: new OTLPMetricExporter({ url: otlpEndpoint }),
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});
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const sdk = new NodeSDK({
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resource,
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traceExporter: new OTLPTraceExporter({ url: otlpEndpoint }),
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metricReader,
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instrumentations: [
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getNodeAutoInstrumentations({
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// Disable fs by default — it is noisy and rarely useful.
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'@opentelemetry/instrumentation-fs': { enabled: false },
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'@opentelemetry/instrumentation-dns': { enabled: false },
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}),
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new PinoInstrumentation(),
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],
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});
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if (process.env.NODE_ENV !== 'test') {
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sdk.start();
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}
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const shutdown = async () => {
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try {
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if (process.env.NODE_ENV !== 'test') {
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await sdk.shutdown();
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}
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} catch (err) {
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// eslint-disable-next-line no-console
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console.error('OpenTelemetry shutdown failed', err);
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}
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};
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process.on('SIGTERM', shutdown);
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process.on('SIGINT', shutdown);
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