Alerting and cross-signal drill-down — sequence diagrams

One diagram per scenario; each tab is one scenario from the source.

Alerting

Rulers in Mimir (PromQL) and Loki (LogQL) evaluate rule groups on an interval and push firing alerts to Alertmanager, which groups, dedupes and routes.

Cross-signal drill-down

The payoff of one stack: a latency spike on a dashboard drills to the exact trace (via exemplars), then to the logs of the failing span (via trace ID) — three queries, one UI.