Kubernetes Cluster
A set of nodes managed by a control plane that run containerized workloads together.
What is Kubernetes Cluster?
A Kubernetes cluster is the fundamental deployment unit of Kubernetes: a collection of worker machines (nodes) controlled by a single control plane. The control plane schedules workloads, maintains desired state, and exposes the Kubernetes API, while worker nodes execute Pods. Every object in Kubernetes — Deployments, Services, ConfigMaps, PersistentVolumes — lives inside a cluster.
Clusters can span multiple availability zones within a cloud region, providing fault tolerance without spreading across regions. Multi-cluster architectures are common in large enterprises for geographic distribution, blast-radius isolation, or regulatory data-residency requirements. Tools like Cluster API, GKE Autopilot, EKS, and AKS handle the lifecycle of individual clusters.
From a cost perspective, each cluster carries fixed overhead: the control plane itself (billed by cloud providers at $72–$146/month on GKE/EKS), plus system Pods like CoreDNS and kube-proxy that consume node resources regardless of application load. Unused clusters left running after a project ends are among the most expensive forms of Kubernetes waste.
Example
# List all clusters accessible via kubeconfig
kubectl config get-contexts
# Switch to a specific cluster
kubectl config use-context my-prod-cluster
# View cluster info
kubectl cluster-infoCost & Waste Implications
Idle or forgotten clusters continue to incur control plane fees ($72–$146/month on managed Kubernetes services) plus node costs. A single forgotten 3-node dev cluster running m5.large instances on EKS costs roughly $350/month in compute alone, not counting storage or data transfer.
How KorPro Helps
KorPro connects to all your clusters across GCP, AWS, and Azure automatically and surfaces per-cluster cost breakdowns and orphaned resource counts so you can identify which clusters are safe to scale down or delete.
Scan Your Cluster FreeRelated Terms
Node
Core ConceptsA physical or virtual machine in a Kubernetes cluster that runs Pods under the direction of the control plane.
Read definitionControl Plane
Core ConceptsThe set of components that store cluster state, schedule workloads, and run controllers to maintain desired state.
Read definitionNamespace
Core ConceptsA virtual partition within a cluster that isolates resources, access control, and networking between teams or environments.
Read definitionKubernetes Cost Optimization
FinOpsThe practice of reducing Kubernetes infrastructure spend while maintaining performance and reliability.
Read definitionStop Wasting Money on Orphaned Kubernetes Resources
KorPro connects to your clusters across GCP, AWS, and Azure — no agents, no installation — and surfaces every orphaned resource with its monthly cost estimate.