在您的工作站上打开一个终端，并使用 ssh-keygen 命令生成新的密钥。指定 -C 标志以添加一条带有您的用户名的注释。

ssh-keygen -t rsa -f ~/.ssh/[KEY_FILENAME] -C [USERNAME]

向实例提供 SSH 公钥

在本地终端中，使用 ssh 命令以及您的 SSH 私钥文件、用户名和要连接到的实例的外部 IP 地址。例如：

ssh -i path-to-private-key username@external-ip

从多个压缩文件解压

cat lotus-make.* | tar xzvf -

Disable Swap

sudo swapon --show sudo swapoff -v /swapfile sudo vi /etc/fstab --remove /swapfile none swap sw 0 0

sudo rm /swapfile

Verify the MAC address and product_uuid are unique for every node

Product ID: sudo cat /sys/class/dmi/id/product_uuid

setup iptables

modprobe br_netfilter ( Check command lsmod | grep br_netfilter )

sudo vi /etc/sysctl.d/k8s.conf with text below:
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1

sudo sysctl --system

K8s Runtime - docker

Install Docker CE

Set up the repository:

Install packages to allow apt to use a repository over HTTPS

sudo apt-get update
sudo apt-get install -y apt-transport-https ca-certificates curl software-properties-common gnupg2

Add Docker’s official GPG key

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Add Docker apt repository.

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

Install Docker CE.

sudo apt-get update && sudo apt-get install -y containerd.io=1.2.13-1 docker-ce=5:19.03.8~3-0~ubuntu-$(lsb_release -cs) docker-ce-cli=5:19.03.8~3-0~ubuntu-$(lsb_release -cs)

Setup daemon.

sudo vi /etc/docker/daemon.json with content below:

{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2"
}

sudo mkdir -p /etc/systemd/system/docker.service.d

Restart docker.

sudo systemctl daemon-reload
sudo systemctl restart docker

Installing kubeadm, kubelet and kubectl

sudo apt-get update && sudo apt-get install -y apt-transport-https curl curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF

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

Configure cgroup driver used by kubelet on control-plane node