环境参数

说明

• 本脚本参考Linux Foundation关于Kubernetes new Cluster的脚本，并讲源换成ali云，本脚本支持单一Master实验环境
• 使用 bash k8scp.sh | tee $HOME/cp.out命令，保持实验结果，便于找到kubeadm jion信息

1. Master：

#!/bin/bash
#/* **************** 2021-12-20 /k8scp.sh **************** */
#/*
# * The code is from: Copyright the Linux Foundation, 2021
# * Chaged By Etaon

# * This Copyright is retained for the purpose of protecting free
# * redistribution of source.
# *
# *     URL:    https://training.linuxfoundation.org
#
# *     email:  info@linuxfoundation.org
#               001@etaon.top
# *
# * This code is distributed under Version 2 of the GNU General Public
# * License, which you should have received with the source.
# *
# */
#!/bin/bash -x
## TxS 6-2021 
## v1.21.1 CKA/CKAD/CKS
echo "This script is written to work with Ubuntu 18.04"
sleep 3
echo
echo "Disable swap until next reboot"
echo 
sudo swapoff -a

echo "Update the local node"
sudo apt-get update && sudo apt-get upgrade -y
echo
echo "Install Docker"
sleep 3

# Set Docker mirrors to aliyun 

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

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

apt-cache madison docker-ce

sudo apt-get install -y docker.io

echo
echo "Install kubeadm, kubelet, and kubectl"
sleep 3

# Set Kubernetes mirrors to aliyun

sudo curl -s https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add -
    
sudo tee /etc/apt/sources.list.d/kubernetes.list <<-'EOF'
 deb https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial main
EOF


sudo apt-get update

sudo apt-get install -y kubeadm=1.21.1-00 kubelet=1.21.1-00 kubectl=1.21.1-00

sudo apt-mark hold kubelet kubeadm kubectl

echo
echo "Installed - now to get Calico Project network plugin"

## If you are going to use a different plugin you'll want
## to use a different IP address, found in that plugins 
## readme file. 

sleep 3

sudo bash <<-'EOF'
#!/bin/bash
images=(
    kube-apiserver:v1.21.1
    kube-controller-manager:v1.21.1
    kube-scheduler:v1.21.1
    kube-proxy:v1.21.1
    pause:3.4.1
    etcd:3.4.13-0
    coredns:1.8.0
)

for imageName in ${images[@]} ; do
    docker pull registry.aliyuncs.com/google_containers/$imageName
    docker tag registry.aliyuncs.com/google_containers/$imageName k8s.gcr.io/$imageName
    docker rmi registry.aliyuncs.com/google_containers/$imageName
done
EOF



sudo docker tag k8s.gcr.io/coredns:1.8.0 k8s.gcr.io/coredns/coredns:v1.8.0 

## This assumes you are not using 192.168.0.0/16 for your host

sudo kubeadm init --kubernetes-version 1.21.1 --pod-network-cidr 192.168.0.0/16

sleep 5

echo "Running the steps explained at the end of the init output for you"

mkdir -p $HOME/.kube

sleep 2

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

sleep 2

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

echo "Apply Calico network plugin from ProjectCalico.org"
echo "If you see an error they may have updated the yaml file"
echo "Use a browser, navigate to the site and find the updated file"

kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml

echo
echo
sleep 3
echo "You should see this node in the output below"
echo "It can take up to a minute for node to show Ready status"
echo
kubectl get node
echo

echo
echo "Script finished. Move to the next step"

2. Worker：

#!/bin/bash
#/* **************** LFS260:2021-08-10 s_04/k8sSecond.sh **************** */
#/*
# * The code is from: Copyright the Linux Foundation, 2021
# * Chaged By Etaon

# * This Copyright is retained for the purpose of protecting free
# * redistribution of source.
# *
# *     URL:    https://training.linuxfoundation.org
#
# *     email:  info@linuxfoundation.org
#               001@etaon.top
# *
# * This code is distributed under Version 2 of the GNU General Public
# * License, which you should have received with the source.
# *
# */
#!/bin/bash -x
## TxS 06-2021
## CKA/CKAD/CKS for 1.21.1
##
echo "  This script is written to work with Ubuntu 18.04"
echo
sleep 3
echo "  Disable swap until next reboot"
echo
sudo swapoff -a

echo "  Update the local node"
sleep 2
sudo apt-get update && sudo apt-get upgrade -y
echo
sleep 2

# Set Docker mirrors to aliyun 

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

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

echo "  Install Docker"
sleep 3
sudo apt-get install -y docker.io


echo
echo "  Install kubeadm, kubelet, and kubectl"
sleep 2

# Set Kubernetes mirrors to aliyun

sudo curl -s https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add -
    
sudo tee /etc/apt/sources.list.d/kubernetes.list <<-'EOF'
 deb https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial main
EOF

sudo apt-get update

sudo apt-get install -y kubeadm=1.21.1-00 kubelet=1.21.1-00 kubectl=1.21.1-00

sudo apt-mark hold kubelet kubeadm kubectl
echo
echo "  Script finished. You now need the kubeadm join command"
echo "  from the output on the cp node"
echo

最后worker需要手动加入Cluster

zyi@worker:~$ sudo kubeadm join 192.168.21.110:6443 --token vrg7be.z4f8n71mfgaubqiq         --discovery-token-ca-cert-hash sha256:7b0510eff65c6c918a80536ffdd45678b785cba3cc152b31f2ac47e8f5ba8bcf 
[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/
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Starting the kubelet
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...

This node has joined the cluster:
* Certificate signing request was sent to apiserver and a response was received.
* The Kubelet was informed of the new secure connection details.

Run 'kubectl get nodes' on the control-plane to see this node join the cluster.