直接运行脚本，一步完成配置。需要至少2台ubuntu，1个master-node，1-N个worker-node.
配置master节点
#!/bin/bash
# user could update hostname
export hostname=master-node
# k8s version used
export kube_version=1.17.0-00
# install curl
sudo apt-get update
sudo apt-get install -y curl
# add kubenetes repository
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add
sudo apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main"
# install docker
if ! [ -x "$(command -v docker)" ]; then
echo "Docker installing ..."
curl -sSL https://get.docker.com/ | sh
else
echo "docker has already been installed"
fi
# set user into docker group, need logout to take effect
#sudo usermod -aG docker tas
# install kubeadm kubelet kubectl
sudo apt-get install -y kubelet=$kube_version kubeadm=$kube_version kubectl=$kube_version
#turn off swap
sudo swapoff -a
# set hostname and add line to hosts file
sudo hostnamectl set-hostname $hostname
sudo sed -i "1i127.0.1.1 ${hostname}" /etc/hosts
# For master-node
sudo kubeadm init --pod-network-cidr=10.244.0.0/16
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
#Deploy Pod Network to Cluster
sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
执行上面的脚本，从返回消息中找到如下信息，将在配置worker节点的脚本中使用:
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 10.97.170.98:6443 --token fwhlz2.r0en0tkopmsjinit \
--discovery-token-ca-cert-hash sha256:9844a8db82627a49838966d025d2d6b88f1ad7baabafe69d4f98d9979653a155
配置worker节点
- 自定义第四行hostname，如worker1， worker2
- 修改最后一行，用上一步中的返回信息替换，然后执行脚本
#!/bin/bash
# user could update hostname
export hostname=worker-node1
# k8s version used
export kube_version=1.17.0-00
# install curl
sudo apt-get update
sudo apt-get install -y curl
# add kubenetes repository
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add
sudo apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main"
# install docker
if ! [ -x "$(command -v docker)" ]; then
echo "Docker installing ..."
curl -sSL https://get.docker.com/ | sh
else
echo "docker has already been installed"
fi
# set user into docker group, need logout to take effect
#sudo usermod -aG docker tas
# install kubeadm kubelet kubectl
sudo apt-get install -y kubelet=$kube_version kubeadm=$kube_version kubectl=$kube_version
#turn off swap
sudo swapoff -a
# set hostname and add line to hosts file
sudo hostnamectl set-hostname $hostname
sudo sed -i "1i127.0.1.1 ${hostname}" /etc/hosts
# copy the output from master node kubeadm init
sudo kubeadm join 10.97.170.70:6443 --token icorqs.u4gbnyz7p11vkqz3 --discovery-token-ca-cert-hash sha256:cbbb51f01046558f6c7f2d6b5dee63a05fb14c35aae9cd9766191f10644abbf5
卸载环境
#!/bin/bash
echo "reset kubeadm"
sudo kubeadm reset
while true; do
echo "Do you want to uninstall kubernetes software?"
read -p "(y/n) " yn
case $yn in
[Yy]* ) uninstall_kube=yes; break;;
[Nn]* ) break;;
* ) echo "Please answer yes or no.";;
esac
done
if [ "$uninstall_kube" = "yes" ]; then
echo "##########################################################################"
echo "uninstall k8s components"
echo "##########################################################################"
sudo apt-get purge kubeadm kubectl kubelet kubernetes-cni kube*
sudo apt-get autoremove
sudo rm -rf ~/.kube
fi
while true; do
echo "Do you want to uninstall docker?"
read -p "(y/n) " yn
case $yn in
[Yy]* ) uninstall_docker=yes; break;;
[Nn]* ) break;;
* ) echo "Please answer yes or no.";;
esac
done
if [ "$uninstall_docker" = "yes" ]; then
echo "##########################################################################"
echo "uninstall k8s components"
echo "##########################################################################"
sudo apt-get purge -y docker-engine docker docker.io docker-ce
sudo apt-get autoremove -y --purge docker-engine docker docker.io docker-ce
sudo rm -rf /var/lib/docker /etc/docker
sudo groupdel docker
sudo rm -rf /var/run/docker.sock
fi
