Otel-logger.js example used in blog post https://rudimartinsen.com/2025/07/27/otel-instrumenting-app/

otel-logger.js

// otel-logger.js
const { logs } = require('@opentelemetry/api-logs');

// Get the global logger provider (set in instrumentation.js)
const appName = process.env.OTEL_SERVICE_NAME || 'my-app';
const logger = logs.getLogger(appName);

// Optional: wrap it with convenience methods
function logInfo(message, attributes = {}) {
  logger.emit({
    severityText: 'INFO',
    body: message,
    attributes,
  });
}

function logError(message, attributes = {}) {
  logger.emit({
    severityText: 'ERROR',
    body: message,
    attributes,
  });
}

// Export the logger and helper methods
module.exports = {
  logger,
  logInfo,
  logError,
};