Krajina se dělí podle pilíře — metriky, logy, trasy — plus all-in-one spravované platformy. Výběr se redukuje na self-hosted vs managed, řízen velikostí týmu, rozpočtem a měřítkem.
Nástroje podle pilíře
METRICS Prometheus → pull-based scraping, time-series DB, PromQL query language
Grafana → dashboards on top of Prometheus (and many other sources)
LOGS ELK → Elasticsearch + Logstash + Kibana (powerful, heavy to run)
Loki → "Prometheus for logs": cheap, indexes labels not full text
TRACES Jaeger → distributed tracing, OpenTelemetry-compatible
Tempo → trace backend that pairs with Grafana/Loki
ALL-IN-ONE Datadog → managed metrics + logs + traces + APM in one product
