userdata.yaml

apiVersion: karpenter.k8s.aws/v1alpha1
kind: AWSNodeTemplate
metadata:
  name: userdata-template
spec:
  ## If no amiFamily is defined, Karpenter will set the default amiFamily to AL2
  # amiFamily: Bottlerocket ## Currently, Karpenter supports amiFamily values AL2, Bottlerocket, Ubuntu, Windows2019, Windows2022 and Custom.
  subnetSelector:
    karpenter.sh/discovery: "<<CLUSTER_NAME>>"
  securityGroupSelector:
    karpenter.sh/discovery: "<<CLUSTER_NAME>>"
  instanceProfile: "<<KARPENTER_NODE_IAM_INSTANCE_PROFILE_NAME>>"
  userData:  |
    MIME-Version: 1.0
    Content-Type: multipart/mixed; boundary="BOUNDARY"

    --BOUNDARY
    Content-Type: text/x-shellscript; charset="us-ascii"

    #!/bin/bash
    echo $(jq '.containerLogMaxFiles=10|.containerLogMaxSize="100Mi"' /etc/kubernetes/kubelet/kubelet-config.json) > /etc/kubernetes/kubelet/kubelet-config.json
    
    --BOUNDARY--
---
apiVersion: karpenter.sh/v1alpha5
kind: Provisioner
metadata:
  name: userdata
spec:
  labels:
    intent: userdata
  requirements:
    - key: "karpenter.k8s.aws/instance-category"
      operator: In
      values: ["c", "m", "r", "i", "d"]
    - key: "karpenter.k8s.aws/instance-cpu"
      operator: Lt
      values: ["65"]
    - key: karpenter.sh/capacity-type
      operator: In
      values: ["spot", "on-demand"]
  kubeletConfiguration:
    containerRuntime: containerd
  limits:
    resources:
      cpu: 100000
      memory: 5000Gi
  consolidation:
    enabled: true
  ttlSecondsUntilExpired: 604800
  providerRef:
    name: userdata-template