OpenTelemetry Instrumentation Dashboard

[ollygarden-rose]

OpenTelemetry Instrumentation Dashboard

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Last review: 2026-07-01T00:39:43Z | Next scheduled review: 2026-07-08T00:39:43Z

• Trigger review

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Instrumentation Summary

No OpenTelemetry instrumentation detected in this codebase. The repository is a minimal single-file Go HTTP server with no third-party dependencies — go.sum is empty and go.mod declares only the module name. No OTel SDK packages, auto-instrumentation libraries, exporters, or manual span/metric call sites exist anywhere in the source, Dockerfile, Kubernetes manifests, or CI workflow. No alternative observability framework is used either.

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Action Queue

Critical (0)

No findings

High (1)

• HTTP server handler has no tracing, metrics, or observability — total operational blindness
  main.go:9

  Why and how to fix

  
  

  The application's only runtime boundary — the HTTP server on :8081 with the / handler (HelloServer) — produces no spans, metrics, or structured logs. go.mod declares zero dependencies (no OTel SDK, no logging library), and k8s/deployment.yaml carries no auto-instrumentation injection annotations (instrumentation.opentelemetry.io/inject-go) or OTEL_* environment variables. This means request latency, error rates, and throughput are invisible; when an upstream caller's trace reaches this service, there is no server span to link to, breaking distributed trace continuity.

  Fix:

  Option A — code instrumentation (recommended):

  Add go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp and initialize the OTel SDK with an OTLP exporter in main.go. Wrap the handler so every inbound request produces a server span with HTTP semantic convention attributes:

  import (
    "context"
    "go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
    "go.opentelemetry.io/otel"
    sdktrace "go.opentelemetry.io/otel/sdk/trace"
    "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
    "go.opentelemetry.io/otel/sdk/resource"
    semconv "go.opentelemetry.io/otel/semconv/v1.40.0"
  )
  
  func main() {
    ctx := context.Background()
    exp, _ := otlptracegrpc.New(ctx)
    tp := sdktrace.NewTracerProvider(
      sdktrace.WithBatcher(exp),
      sdktrace.WithResource(resource.NewWithAttributes(
        semconv.SchemaURL,
        semconv.ServiceName("hello-world"),
      )),
    )
    defer tp.Shutdown(ctx)
    otel.SetTracerProvider(tp)
  
    handler := otelhttp.NewHandler(http.HandlerFunc(HelloServer), "GET /")
    http.Handle("/", handler)
    http.ListenAndServe(":8081", nil)
  }

  Option B — zero-code instrumentation:

  Add the annotation instrumentation.opentelemetry.io/inject-go: "true" to the pod template in k8s/deployment.yaml and deploy an OpenTelemetry Operator Instrumentation CR. See Go zero-code instrumentation docs for details.

Medium (0)

No findings

Suggestion (0)

No findings

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