kubeadm init 命令在 ubuntu 主节点上失败

Question

kubeadm init --apiserver-advertise-address=192.168.56.103 --pod-network-cidr=192.168.0.0/16

出现以下错误

W0501 02:23:32.828806    8629 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
[init] Using Kubernetes version: v1.18.2
[preflight] Running pre-flight checks
    [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
error execution phase preflight: [preflight] Some fatal errors occurred:
    [ERROR Port-10259]: Port 10259 is in use
    [ERROR Port-10257]: Port 10257 is in use
    [ERROR Port-10250]: Port 10250 is in use
    [ERROR Port-2380]: Port 2380 is in use
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
To see the stack trace of this error execute with --v=5 or higher

Answer 1

[ERROR Port-10259]: Port 10259 is in use
[ERROR Port-10257]: Port 10257 is in use
[ERROR Port-10250]: Port 10250 is in use
[ERROR Port-2380]: Port 2380 is in use

以上错误显示端口正在使用中。

在 Kubernetes 中

• 10259 => kube-scheduler 的默认端口
• 10257 => kube-controller-manager 的默认端口
• 10250 => kubelet 的默认端口
• 2380 => etcd 使用这个

似乎kubeadm init 已在此节点上调用。在运行kubeadm init 命令之前运行kubeadm reset。

如果这对您不起作用，那么您可以通过运行检查哪个进程使用这些端口

netstat -lnp | grep 1025

你可以通过运行来终止这些端口

sudo fuser -k <port>/tcp