TopologyKey:

 topologyKey: kubernetes.io/hostname

https://karpenter.sh/preview/concepts/scheduling/ The three supported topologyKey values that Karpenter supports are:

topology.kubernetes.io/zone
kubernetes.io/hostname
karpenter.sh/capacity-type

nodeSelector:
Kubernetes Pod Topology Spread Constraints

See also

• 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