> ## Documentation Index
> Fetch the complete documentation index at: https://radarhq.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# OpenCost Kubernetes cost visibility

> Radar reads OpenCost allocation metrics from your existing Prometheus for cluster, namespace, application, workload, and node cost visibility.

[OpenCost](https://www.opencost.io/) is a CNCF project for Kubernetes cost monitoring. It combines cloud or configured pricing with Kubernetes resource allocation and exposes the results as Prometheus metrics.

Radar discovers OpenCost data through the already-connected Prometheus. No OpenCost CRDs or additional Radar configuration are required. The integration is passive and read-only.

## What Radar shows

* Current cluster rate and monthly projection.
* CPU, memory, storage, and network cost when present.
* Namespace and node breakdowns.
* Focused application and workload CPU and memory allocation cost.
* Historical 6h, 24h, and 7d trends with hover details.
* Separate CPU and memory allocation-use evidence when usage coverage is complete.

See [Cost insights](/docs/features/cost) for the user-facing views and current scope.

## Prerequisites

OpenCost or Kubecost must be deployed and its metrics must be scraped by [Prometheus](/docs/features/integrations/prometheus). Missing provider pricing or allocation metrics appear as unavailable rather than zero.

## Rightsizing is separate

[Rightsizing](/docs/features/rightsizing) uses container demand metrics to provide workload-level request guidance. OpenCost provides the cost context, but it does not produce Radar's request suggestions.