Integrate on Google Cloud Functions Node.js

1npm install --save @opentelemetry/sdk-trace-node @opentelemetry/semantic-conventions

1const { Resource } = require('@opentelemetry/resources');
2const { NodeTracerProvider } = require('@opentelemetry/sdk-trace-node');
3const { SemanticResourceAttributes } = require('@opentelemetry/semantic-conventions');
4const { DtSpanExporter, DtSpanProcessor, DtTextMapPropagator, DtSampler } = require('@dynatrace/opentelemetry-core');
5
6const provider = new NodeTracerProvider({
7  resource: new Resource({
8    [SemanticResourceAttributes.SERVICE_NAME]: "My Service",
9  }),
10  sampler: new DtSampler(),
11  // ...other configurations
12});
13
14const processor = new DtSpanProcessor(new DtSpanExporter());
15provider.addSpanProcessor(processor);
16provider.register({
17  propagator: new DtTextMapPropagator(),
18  // ...other configurations
19});

1const { startActiveHttpSpan, endHttpSpanAndFlush } = require('@dynatrace/opentelemetry-gcf');
2
3// ...tracing initialization code
4
5async function handler(req, res) {
6  await startActiveHttpSpan(req, async (span) => {
7    let error;
8    try {
9      // do something
10    } catch (e) {
11      error = e;
12    }
13
14    // status should be set before span ends
15    res.status(error != null ? 500 : 200);
16    /**
17     * Span must be ended and flushed before handler sends response.
18     * This limitiation comes from GCF, for details see:
19     * https://cloud.google.com/functions/docs/concepts/nodejs-runtime#signal-termination
20     */
21    await endHttpSpanAndFlush(span, res, error);
22    res.send("hello world");
23  });
24}