k0s

Applies to management clusters only

The following table lists the ports that the k0s Kubernetes underlay of a management cluster requires on the LCM network. For the Kubernetes distribution used by each cluster type, see Kubernetes distributions.

Component	Protocol	Port	Consumers
Kubernetes API through the cluster load balancer	TCP	443	External clients, cluster nodes, LCM Agent
Kubernetes API server	TCP	12388	Local HAProxy instance on the same node
k0s management API	TCP	4443	Control plane nodes
etcd client connections	TCP	2379	Control plane nodes
etcd server-to-server communication	TCP	2380	Control plane nodes
kubelet API	TCP	10250	Control plane nodes

Note

A k0s-based cluster runs neither Docker Swarm nor the MKE API. Therefore, the MKE-specific ports listed in MOSK management are not required. All other ports of that section, including Calico, MetalLB, and kubelet, apply to k0s as well.

For the ports that are common to all cluster types, such as SSH, DNS, and NTP, as well as the cluster networking ports of MetalLB, Calico, kubelet, and the Kubernetes NodePort range, see MOSK management.