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Important Ports

Port NumberPurposeHostFrom
22SSH
2379ETCD Server (for CLI tools)ETCD hostsControllers
2380ETCD Peer to peer commsETCD hostsETCD Hosts
6443Kubernetes API kube-apiControllers*
10250Kubelet*
10269Kubernetes Scheduler kube-schedulerControllers
10257Kubernetes Controller Managers kube-controller-managerControllers
30000-32767NodePort Services (Workers only)Workers0.0.0.0/0

todo! Why does kube-scheduler need port 10269?