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k3s vs microk8s Comparision

Kubespray vs Kubeadm

Kubeadm provides domain Knowledge of Kubernetes clusters' life cycle management, including self-hosted layouts, dynamic discovery services and so on. Had it belonged to the new operators world, it may have been named a "Kubernetes cluster operator". Kubespray however, does generic configuration management tasks from the "OS operators" ansible world, plus some initial K8s clustering (with networking plugins included) and control plane bootstrapping.

Kubespray has started using kubeadm internally for cluster creation since v2.3 in order to consume life cycle management domain knowledge from it and offload generic OS configuration things from it, which hopefully benefits both sides.