kidmam / karpenter

Kubernetes Node Autoscaling: built for flexibility, performance, and scalability. https://karpenter.sh

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Karpenter is an open-source node provisioning project built for Kubernetes. Its goal is to improve the efficiency and cost of running workloads on Kubernetes clusters. Karpenter works by:

  • Watching for pods that the Kubernetes scheduler has marked as unschedulable
  • Evaluating scheduling constraints (resource requests, nodeselectors, affinities, tolerations, and topology spread constraints) requested by the pods
  • Provisioning nodes that meet the requirements of the pods
  • Scheduling the pods to run on the new nodes
  • Removing the nodes when the nodes are no longer needed

For most use cases, a cluster’s capacity can be managed by a single Karpenter Provisioner. However, you can define multiple Provisioners, enabling use cases like isolation, entitlements, and sharding. Using a combination of defaults and overrides, Karpenter determines the availability zone, instance type, capacity type, machine image, and scheduling constraints for pods it manages.

Come discuss Karpenter in the #provider-aws channel in the Kubernetes slack!

Check out the Docs to learn more.

Installation

Follow the setup recommendations of your cloud provider.

Note: There may be backwards incompatible changes between versions when upgrading before v0.3.0. Karpenter follows Kubernetes versioning guidelines. Before upgrading, we recommend:

  • Check the release notes
  • Uninstall Karpenter
  • Remove all nodes launched by karpenter
  • Reinstall Karpenter

References

Talks

License

This project is licensed under the Apache-2.0 License.

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Kubernetes Node Autoscaling: built for flexibility, performance, and scalability. https://karpenter.sh

License:Apache License 2.0


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