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+1 for Grafana together with Loki and Prometheus. This saved us so much trouble. We thought about using DD first but the costs were so intransparent.

Grafana Tempo for the traces looks interesting too! Especially now that it doesn't require Elastic anymore

Curious, do you use self-host Prom+Loki?

I do it with my clients, but we're not using a lot of clusters.