kubernetes官方网站：

Installing kubeadm | Kubernetes

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一、Unable to pick a default driver

执行minikube start命令是报如下错误：

Exiting due to DRV_NOT_DETECTED: No possible driver was detected. Try specifying --driver, or see https://minikube.sigs.k8s.io/docs/start/

解决方法：安装docker

#使用官方安装脚本自动安装docker:
curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

与此同时将当前用户加入docker组；

#安装docker后将当前用户加入docker组：
具体操作可参考：
sudo groupadd docker
sudo gpasswd -a $USER docker
newgrp docker
docker version

 具体截图如下图所示：

重新执行minikube start命令：

设置virtualBox，给ubuntu分配2个cpu;具体如下图所示：

重新执行minikube start命令:

二、 Failed to connect to packages.cloud.google.com port 443: Connection timed out

根据官网知识，按照以下命令：下载安装Google Cloud public signing key的时候：Download the Google Cloud public signing key：

sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg

具体截图如下：

尝试解决方法1：失败

手动下载https://packages.cloud.google.com/apt/doc/apt-key.gpg，将下载后的apt-key.gpg复制到/usr/share/keyrings/kubernetes-archive-keyring.gpg文件下；

sudo cp /home/yundong/Downloads/apt-key.gpg  /usr/share/keyrings/kubernetes-archive-keyring.gpg

 继续执行官方文档命令，报如下错误：Unable to locate package kubelet/kubeadm/kubectl；

 尝试解决方法二：

修改download server为国内的mirrors.aliyun.com,然后reload结；具体操作如下：

重新执行sudo apt update命令：

这个是因为官方镜像地址需要能访问国外网的，没有翻墙，国内是连接不上的，所以：

修改为国内的镜像地址：

echo “deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main” | sudo tee /etc/apt/sources.list.d/kubernetes.list

结果如下图所示：

仔细检查才发现，官方指导的“”是中文的，于是修改为英文""，再次尝试如下：

echo "deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list

报如下错误：
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FEEA9169307EA071 NO_PUBKEY 8B57C5C2836F4BEB
Reading package lists... Done
W: GPG error: https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FEEA9169307EA071 NO_PUBKEY 8B57C5C2836F4BEB
E: The repository 'https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial InRelease' is not signed.

 三、使用阿里云源的Public Key的问题

The following signatures couldn't be verified because the public key is not available: NO_PUBKEY FEEA9169307EA071 NO_PUBKEY 8B57C5C2836F4BEB

解决方法：

执行以下命令，给阿里云源添加key:

cat /usr/share/keyrings/kubernetes-archive-keyring.gpg |  sudo apt-key add -

 具体操作和结果如下图所示：

最后，按照官方文档，执行如下命令：

sudo apt update
sudo apt install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl

最终结果如下图所示：

四、安装kubeadm步骤总结

 第一步：Update the apt package index and install packages needed to use the Kubernetes apt repository

sudo apt update && sudo apt install -y apt-transport-https ca-certificates curl

第二步：Download the Google Cloud public signing key:

#浏览器访问改地址，手动下载pt-key.gpg
https://packages.cloud.google.com/apt/doc/apt-key.gpg
#cp
sudo cp /home/yundong/Downloads/apt-key.gpg  /usr/share/keyrings/kubernetes-archive-keyring.gpg

第三步：Add the Kubernetes apt repository:

echo “deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main” | sudo tee /etc/apt/sources.list.d/kubernetes.list

第四步：给阿里云源添加public key

cat /usr/share/keyrings/kubernetes-archive-keyring.gpg |  sudo apt-key add -

第五步：Update apt package index, install kubelet, kubeadm and kubectl, and pin their version

sudo apt update
sudo apt install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl