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DevOps & observability · #prometheus
Learn how Prometheus recording rules pre‑compute expensive queries, reduce dashboard latency, and avoid common pitfalls.
An architecture note covering the requirements, smallest suitable design, trust boundaries, operational checks, failure modes, and conditions that would trigger a redesign of Prometheus remote write.
Learn how Prometheus’ Remote Write streams data to Thanos or Cortex for scalable storage, with a step‑by‑step config, a real example, and a clear view of the trade‑offs.
A practical guide to turning Prometheus dashboard panels into Grafana alert rules, configuring notification channels, and verifying firing states safely.
Configure Prometheus remote write over TLS with basic auth: config, validation, queue monitoring, and rollback.
Deploy the Rancher‑monitoring Helm chart for a lightweight Prometheus‑Grafana‑Alertmanager stack. This guide covers sizing, trust boundaries, operational checks, failure modes, and when to scale the design.
Precompute expensive PromQL aggregations at write time so dashboards read fewer series.
Use Prometheus recording rules to pre‑compute heavy queries like long‑window rate() calculations. Reduce dashboard latency, keep alerts fast, and understand the trade‑offs in staleness, cardinality, and evaluation cost.
Decide whether to use Rancher’s built‑in monitoring or a self‑managed stack, compare resource overhead and flexibility, then follow a step‑by‑step enable‑and‑verify procedure.
grafana
rancher