Enable OTEL go metrics

[ppcano]

Currently, QuickPizza exposes Prometheus Go metrics (go_**).

However, Application Observability expects OTEL Go metrics (process_runtime_go_*).

How to test

You can test this using the docker-compose-cloud.yaml setup.

Quick start instructions are available in the README

Solution

I am not sure, but one potential solution could be to re-instrument using the latest OpenTelemetry SDK: https://pkg.go.dev/go.opentelemetry.io/contrib/instrumentation/runtime

Current instrumentation in QuickPizza can be found in:

• https://github.com/grafana/quickpizza/blob/main/cmd/main.go
• https://github.com/grafana/quickpizza/blob/main/pkg/http/http.go
• https://github.com/grafana/quickpizza/blob/main/pkg/http/tracing.go
• and the corresponding Alloy config