Distributed Services with Go

Make Your Service Observable

Let’s make your service observable by adding metrics, structured logs, and traces. When you deploy your services to production, you’ll usually configure your metrics, structured logs, and traces to go to external services like Prometheus,^[36] Elasticsearch,^[37] and Jaegar. To keep things simple, we’ll just log our observability pieces to files and see what the data looks like.

OpenTelemetry^[38] is a Cloud Native Computing Foundation (CNCF) project that provides robust and portable APIs and libraries that we can use for metrics and distributed tracing in our service. (OpenCensus and OpenTracing merged to form OpenTelemetry, which is backward-compatible with existing OpenCensus integrations.) OpenTelemetry’s Go gRPC ...