kind: EC2NodeClass
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apiVersion: karpenter.sh/v1 kind: NodePool metadata: name: default spec: template: spec: nodeClassRef: group: karpenter.k8s.aws kind: EC2NodeClass name: default ---
apiVersion: karpenter.k8s.aws/v1
kind: EC2NodeClass
metadata:
name: default
spec:
kubelet:
podsPerCore: 2
maxPods: 20
systemReserved:
cpu: 100m
memory: 100Mi
ephemeral-storage: 1Gi
kubeReserved:
cpu: 200m
memory: 100Mi
ephemeral-storage: 3Gi
evictionHard:
memory.available: 5%
nodefs.available: 10%
nodefs.inodesFree: 10%
evictionSoft:
memory.available: 500Mi
nodefs.available: 15%
nodefs.inodesFree: 15%
evictionSoftGracePeriod:
memory.available: 1m
nodefs.available: 1m30s
nodefs.inodesFree: 2m
evictionMaxPodGracePeriod: 60
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
cpuCFSQuota: true
clusterDNS: ["10.0.1.100"]
# Optional, dictates UserData generation and default block device mappings.
# May be ommited when using an `alias` amiSelectorTerm, otherwise required.
amiFamily: AL2
# Required, discovers subnets to attach to instances
# Each term in the array of subnetSelectorTerms is ORed together
# Within a single term, all conditions are ANDed
subnetSelectorTerms:
# Select on any subnet that has the "karpenter.sh/discovery: ${CLUSTER_NAME}"
# AND the "environment: test" tag OR any subnet with ID "subnet-09fa4a0a8f233a921"
- tags:
karpenter.sh/discovery: "${CLUSTER_NAME}"
environment: test
- id: subnet-09fa4a0a8f233a921
# Required, discovers security groups to attach to instances
# Each term in the array of securityGroupSelectorTerms is ORed together
# Within a single term, all conditions are ANDed
securityGroupSelectorTerms:
# Select on any security group that has both the "karpenter.sh/discovery: ${CLUSTER_NAME}" tag
# AND the "environment: test" tag OR any security group with the "my-security-group" name
# OR any security group with ID "sg-063d7acfb4b06c82c"
- tags:
karpenter.sh/discovery: "${CLUSTER_NAME}"
environment: test
- name: my-security-group
- id: sg-063d7acfb4b06c82c
# Optional, IAM role to use for the node identity.
# The "role" field is immutable after EC2NodeClass creation. This may change in the
# future, but this restriction is currently in place today to ensure that Karpenter
# avoids leaking managed instance profiles in your account.
# Must specify one of "role" or "instanceProfile" for Karpenter to launch nodes
role: "KarpenterNodeRole-${CLUSTER_NAME}"
# Optional, IAM instance profile to use for the node identity.
# Must specify one of "role" or "instanceProfile" for Karpenter to launch nodes
instanceProfile: "KarpenterNodeInstanceProfile-${CLUSTER_NAME}"
# Each term in the array of amiSelectorTerms is ORed together
# Within a single term, all conditions are ANDed
amiSelectorTerms:
# Select on any AMI that has both the `karpenter.sh/discovery: ${CLUSTER_NAME}`
# AND `environment: test` tags OR any AMI with the name `my-ami` OR an AMI with
# ID `ami-123`
- tags:
karpenter.sh/discovery: "${CLUSTER_NAME}"
environment: test
- name: my-ami
- id: ami-123
# Select EKS optimized AL2023 AMIs with version `v20240703`. This term is mutually
# exclusive and can't be specified with other terms.
# - alias: al2023@v20240703
# Optional, propagates tags to underlying EC2 resources
tags:
team: team-a
app: team-a-app
# Optional, configures IMDS for the instance
metadataOptions:
httpEndpoint: enabled
httpProtocolIPv6: disabled
httpPutResponseHopLimit: 1 # This is changed to disable IMDS access from containers not on the host network
httpTokens: required
# Optional, configures storage devices for the instance
blockDeviceMappings:
- deviceName: /dev/xvda
ebs:
volumeSize: 100Gi
volumeType: gp3
iops: 10000
encrypted: true
kmsKeyID: "1234abcd-12ab-34cd-56ef-1234567890ab"
deleteOnTermination: true
throughput: 125
snapshotID: snap-0123456789
# Optional, use instance-store volumes for node ephemeral-storage
instanceStorePolicy: RAID0
# Optional, overrides autogenerated userdata with a merge semantic
userData: |
echo "Hello world"
# Optional, configures detailed monitoring for the instance
detailedMonitoring: true
# Optional, configures if the instance should be launched with an associated public IP address.
# If not specified, the default value depends on the subnet's public IP auto-assign setting.
associatePublicIPAddress: true
status:
# Resolved subnets
subnets:
- id: subnet-0a462d98193ff9fac
zone: us-east-2b
- id: subnet-0322dfafd76a609b6
zone: us-east-2c
- id: subnet-0727ef01daf4ac9fe
zone: us-east-2b
- id: subnet-00c99aeafe2a70304
zone: us-east-2a
- id: subnet-023b232fd5eb0028e
zone: us-east-2c
- id: subnet-03941e7ad6afeaa72
zone: us-east-2a
# Resolved security groups
securityGroups:
- id: sg-041513b454818610b
name: ClusterSharedNodeSecurityGroup
- id: sg-0286715698b894bca
name: ControlPlaneSecurityGroup-1AQ073TSAAPW
# Resolved AMIs
amis:
- id: ami-01234567890123456
name: custom-ami-amd64
requirements:
- key: kubernetes.io/arch
operator: In
values:
- amd64
- id: ami-01234567890123456
name: custom-ami-arm64
requirements:
- key: kubernetes.io/arch
operator: In
values:
- arm64
# Generated instance profile name from "role"
instanceProfile: "${CLUSTER_NAME}-0123456778901234567789"
conditions:
- lastTransitionTime: "2024-02-02T19:54:34Z"
status: "True"
type: InstanceProfileReady
- lastTransitionTime: "2024-02-02T19:54:34Z"
status: "True"
type: SubnetsReady
- lastTransitionTime: "2024-02-02T19:54:34Z"
status: "True"
type: SecurityGroupsReady
- lastTransitionTime: "2024-02-02T19:54:34Z"
status: "True"
type: AMIsReady
- lastTransitionTime: "2024-02-02T19:54:34Z"
status: "True"
type: Ready
Related[edit]
See also[edit]
- kind: EC2NodeClass, amiFamily
kubectl_manifest, 32 seconds- Karpenter,
karpenter.sh, provisioners.karpenter.sh, Karpenter releases, best practices,karpenter.sh/capacity-type, karpenter.sh/discovery,kind: Provisioner, kind: AWSNodeTemplate,kubectl provisioner,TopologyKey, FailedDraining, Evict, DisruptionBlocked, Karpenter logs,controller., ttlSecondsUntilExpired, KEDA, NodePools, Kind: NodePool, Workload Consolidation, Disruption controls
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