Prometheus Alerting Rules That Don't Cry Wolf

Short summary

Noisy Prometheus alerts typically fire on transient scrape failures. The one-line fix: add a `for:` clause requiring conditions to persist before firing (e.g., `for: 10m` ignores 30-second blips). Additionally, use PromQL's group_left to join human-readable labels—e.g., GPU model names instead of UUIDs—so alerts provide actionable context instead of homework.

• •Add `for:` clauses to Prometheus alert rules to prevent single-failure scrape blips from paging on-call
• •Use PromQL's group_left to join human-readable metadata labels onto raw hardware IDs
• •Actionable alerts reduce team alert fatigue and improve incident response quality

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