Karpenter is an open-source node provisioning project built for Kubernetes. It automatically provisions the right compute resources to match your application’s requirements, improving efficiency and reducing costs.

Key Features

• Just-in-time - Provision nodes when pods need them
• Cost Optimization - Choose the most cost-effective instance types
• Multi-zone - Distribute workloads across availability zones
• Spot Instances - Automatically use spot instances for cost savings
• Fast Provisioning - Provision nodes in under 60 seconds

Common Use Cases

• Kubernetes Clusters - Auto-scale worker nodes
• Cost Optimization - Reduce infrastructure costs
• Workload Optimization - Match resources to workload requirements
• Multi-cloud - Work with different cloud providers
• DevOps - Automate node management

Getting Started

# karpenter-provisioner.yaml
apiVersion: karpenter.sh/v1alpha5
kind: Provisioner
metadata:
  name: default
spec:
  requirements:
    - key: karpenter.sh/capacity-type
      operator: In
      values: ["spot", "on-demand"]
  limits:
    resources:
      cpu: 1000
  provider:
    instanceProfile: KarpenterNodeInstanceProfile
    subnetSelector:
      karpenter.sh/discovery: my-cluster
    securityGroupSelector:
      karpenter.sh/discovery: my-cluster

Why Choose Karpenter?

Karpenter excels when you need:

• Cost Savings - Optimize infrastructure costs
• Efficiency - Right-size resources for workloads
• Automation - Automate node provisioning and scaling
• Performance - Fast node provisioning
• Flexibility - Work with multiple instance types and zones

Karpenter is ideal for Kubernetes clusters that need efficient, cost-effective node provisioning.