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Kubernetes 埠號
Kubernetes 所使用到的相關埠號
Control Plane Node
| port | explain |
|---|---|
| 2379/tcp | Client => ETCD Server |
| 2380/tcp | ETCD <=> ETCD 資料互相同步使用 |
| 6443/tcp | Client => Client => Kube Api Server : The Kubernetes API server validates and configures data for the api objects which include pods, services, replicationcontrollers, and others. |
| 10252/tcp | Kube Controller Manager : The Kubernetes controller manager is a daemon that embeds the core control loops shipped with Kubernetes. |
| 10251/tcp | Kubernetes Scheduler : The Kubernetes scheduler is a policy-rich, topology-aware, workload-specific function that significantly impacts availability, performance, and capacity. |
| 443/tcp | Kube Api Server也會用到 |
Worker Node & Control Plane Node
| port | explain |
|---|---|
| 10250/tcp | Kubernetes Kubelet : The kubelet API is used to communicate between kube-scheduler and the node. |
| 10255/tcp | kubelet : Unauthenticated read-only port, allowing access to node state |
| 10256/tcp | kube-proxy : Health check server for Kube Proxy |
| 30000-32767/tcp | Services of type NodePort expose a port on each worker |
| 53/tcp & 53/udp | DNS |
| 443/tcp | Api Server |
| 4149/tcp | kubelet : Default cAdvisor port used to query container metrics |
Others
| port | explain |
|---|---|
| 22/tcp | SSH |
| 80/tcp | Web or Ingress |
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