What are advantages of using Prometheus over Google Cloud Monitoring for SLO based monitoring?

Managed service for prometheus is a managed and automatically scalable prometheus endpoint. You can request the metrics google-cloud-platform error with PromQL language instead of MQL (Monitoring Query Language).

What's the advantage? If you deploy an application instrumented with Open Telemetry (for example), you don't have to change anything. On Kubernetes (GKE), the managed collector do the job for you. google-cloud-platform error Else you have to configure the collector to use Managed Service for Prometheus.

If you build an app from scratch, and you want it portable, Open Telemetry and Prometheus google-cloud-platform error are standard tools to instrument your app.

If not, use Cloud Monitoring!

Important note

That feature is very new and, for now, only the metrics sinks with Managed Service for Prometheus can be query google-cloud-platform error with PromQL. The other metrics must be requested by MQL. It could change in the future.

So, for now, if you can use built in Cloud Monitoring metrics, it's a better solution.