From 7780084390f3911ce11b82b145231619e64e3688 Mon Sep 17 00:00:00 2001 From: calvin Date: Tue, 26 Oct 2021 11:49:51 +0800 Subject: [PATCH] improvement for install-kubeadm. --- .../production-environment/tools/kubeadm/install-kubeadm.md | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md b/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md index 7c6a9dd8bf..1bb1d5b2cc 100644 --- a/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md +++ b/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md @@ -69,7 +69,11 @@ For more details please see the [Network Plugin Requirements](/docs/concepts/ext ## Check required ports These [required ports](/docs/reference/ports-and-protocols/) -need to be open in order for Kubernetes components to communicate with each other. +need to be open in order for Kubernetes components to communicate with each other. You can use `telnet` to check if a port is open. for example: + +```shell +telnet 127.0.0.1 6443 +``` The pod network plugin you use (see below) may also require certain ports to be open. Since this differs with each pod network plugin, please see the