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DevOps & observability · #grafana
A practical guide to turning Prometheus dashboard panels into Grafana alert rules, configuring notification channels, and verifying firing states safely.
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.
Replace manual Grafana UI setup with version-controlled YAML provisioning for data sources, dashboards, and alerts. Learn the prerequisites, file layout, restart procedure, and recovery steps.
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.
Dashboard variables from Prometheus labels are powerful, but high-cardinality labels and panel repetition can silently multiply queries. Learn how to build a curated variable chain, check cardinality before saving, and why variables are not alert boundaries.
Learn how to diagnose why Grafana alert rules show 'No data' or fail to send notifications, with a step‑by‑step checklist for datasource health, query validity, timing, contact points, and silencing.
A complete walkthrough of Grafana unified alerting: a Prometheus CPU rule using node_exporter idle-CPU rate, Slack contact point, label-based routing, and how to test it safely.
Stop duplicating Grafana dashboards per environment. Learn how query and custom variables, chained filtering, and the =~ operator give you one dynamic dashboard — plus the multi-select mistake that causes 'No Data'.
Learn how Grafana Explore turns ad-hoc metric debugging into a fast, repeatable workflow with a concrete Prometheus example.
prometheus
rancher
yaml