[Kube][Commands]

• Import the GPG public key of the Alibaba Cloud image

curl -fsSL https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo gpg --dearmor -o /usr/share/keyrings/kubernetes-archive-keyring.gpg

sudo apt-get update

• Check /etc/apt/sources.list.d/kubernetes.list configuration
  

sudo rm -f /etc/apt/sources.list.d/kubernetes.list

echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list

• Update and install Kubernetes
  

sudo apt-get update

sudo apt-get install -y kubelet kubeadm kubectl

• Confirm whether the installation is successful
  

kubelet --version

kubeadm version

kubectl version --client

• Disable Swap (if not disabled)
  

sudo swapoff -a

sudo sed -i '/swap/d' /etc/fstab

• Initialize the Kubernetes cluster. Run the following command to initialize the Kubernetes master node:
  

sudo kubeadm init --pod-network-cidr=192.168.0.0/16

• Set up kubectl to access the cluster
  

mkdir -p $HOME/.kube

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

sudo chown $(id -u):$(id -g) $HOME/.kube/config

Test whether the connection is successful:

kubectl get nodes

bash

If the master node status is displayed as Ready, it means that the initialization is successful.

• Install network plugin (using Flannel)
  

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

• Add a working node

After the master node is initialized, you can use the following command to join the worker node to the cluster:

kubeadm join <master-ip>:6443 --token <token> --discovery-token-ca-cert-hash sha256:<hash>

If need to deploy an application, can use kubectl apply or Helm deployment.