A Complete Guide to Kube-Prometheus-Stack: Setup, Scaling, and Optimization

kube-prometheus-stack is a Helm chart that provides a Kubernetes monitoring stack composed of the Prometheus Operator, Prometheus, Alertmanager, Grafana, kube-state-metrics, node-exporter, and prebuilt dashboards and alerting rules, with custom resources such as ServiceMonitors and PrometheusRules used to manage discovery and configuration. It distinguishes the Helm-packaged stack from the Prometheus Operator alone and the broader kube-prometheus project, then demonstrates installation, verification, and common configuration changes including persistent storage, retention, scrape selectors, custom targets, component disabling, and resource limits. As deployments grow, operators must manage metric cardinality, disk capacity, retention tradeoffs, recovery behavior, high-availability deduplication, network reliability for remote write, Alertmanager clustering, dashboard and rule maintenance, and manual CRD upgrades. The guide presents OpenObserve as an optional remote-write backend that can consolidate metrics with logs and traces while Prometheus continues scraping, though dashboards and alerting rules require separate migration; it concludes that the bundled stack remains sufficient for smaller environments with modest retention needs and teams able to maintain it.

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