Use both Stackdriver Trace and Logging modules for automated trace collection in logs to enable logs correlation

bunyan-trace.js

require('@google-cloud/trace-agent').start();

const express = require('express');
const app = express();

const bunyan = require('bunyan');
const {LoggingBunyan} = require('@google-cloud/logging-bunyan');

const loggingBunyan = new LoggingBunyan();

const logger = bunyan.createLogger({
  name: 'app',
  level: 'info',
  streams: [
    {stream: process.stdout},
    loggingBunyan.stream(),
  ],
});

app.get('/', (req, res) => {
  logger.error('warp nacelles offline');
  logger.info('shields at 99%');
  res.send('🎉 Hello Node.js on App Engine Standard! 🎉');
});

const server = app.listen(process.env.PORT || 8080, () => {
  const host = server.address().address;
  const port = server.address().port;

  console.log(`Example app listening at http://${host}:${port}`);
});