# OpenCost Kubernetes Cost Monitoring

_2026-10-06 · v0.31.0_

This release brings a first look at Kubernetes cost monitoring, built on OpenCost's Prometheus metrics. It ships as an opt-in feature preview.

This release brings a first look at Kubernetes cost monitoring, built on OpenCost's Prometheus metrics. It ships as an opt-in feature preview.

![OpenCost cost monitoring preview in Zapkube](https://assets.zapkube.com/changelog/v0.31.0/zapkube-opencost-preview.jpeg)

## 💰 Cost (Feature Preview)

- **A new Feature Previews section in Settings** lets you try features that work but are still taking shape. **Cost is off by default**: turn it on there to see it.
- **A Cost overview page** with an **Allocation** tab showing spend, run-rate per month and per hour, a CPU · RAM · PV split, and a daily spend chart, followed by an allocation table you can group by namespace, workload, label, Helm release, Flux or Argo, over a 24h, 7d or 30d window.
- **The Infrastructure tab** breaks spend down into nodes (with idle cost per node and cloud console links), instance types, volumes, load balancers and the management fee, and compares allocated against billed spend.
- **The Rightsizing tab** scans a week of usage and recommends container requests for each workload. Each recommendation shows its estimated savings, a confidence level and the evidence behind it, including the queries it ran. **Apply** writes the new requests in one patch after a confirmation dialog (opt-in from Settings › Monitoring › Cost). When Flux or Argo manages the workload, you get **Copy patch** instead.
- **A Cost tab on resource pages**, covering namespaces, Deployments, StatefulSets, DaemonSets, Jobs, CronJobs, Pods, Nodes, PersistentVolumeClaims and PersistentVolumes, plus a **cost card on the Cluster overview**.
- **Change against the previous window** on every header and row, plus the run-rate compared with 7 and 30 days ago.
- **Multi-cluster aware**: each cluster's idle cost appears beside the pooled total, and a coverage line shows which selected clusters report cost data.
- **Currency** is detected or set per context from Settings › Monitoring › Cost.
- **Keyboard-driven**: the Cost page and its tabs have their own shortcuts and command palette entries, and **F** toggles a full-width side panel.
- **Fast on large clusters**: range queries are read in fixed day cells and cached for the session, so a refresh only re-reads the current one.

## ✨ Other Improvements

- **Chart colours are consistent across the app**: CPU in blue, memory in yellow, storage in purple.
- **The sidebar namespace selector is greyed out** on pages that ignore it.

## 🧹 Misc / Chore

- Bumped frontend and Go dependencies.

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