kubernetes

安装 kubernetes(Ubuntu20.04环境)

安装 kubernetes

环境

  • 操作系统: Ubuntu20.04
  • cpu 架构: x86
  • kubernetes 版本: v1.22.16

基础环境设置

添加 sudo 权限

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sudo visudo

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%sudo ALL=(ALL:ALL) NOPASSWD:ALL

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sudo -i

关闭 Swap

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swapoff -a
vi /etc/fstab

remove the line with swap keyword

设置 iptables

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cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF

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cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

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sysctl --system

安装基础软件

更新

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sudo apt-get update

安装 docker

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sudo apt install docker.io -y

设置 docker

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vi /etc/docker/daemon.json

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{
  "exec-opts": ["native.cgroupdriver=systemd"]
}

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systemctl daemon-reload
systemctl restart docker

添加普通用户

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sudo usermod -aG docker ${USER}

立即生效

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su - ${USER}

安装 apt-transport-https ca-certificates curl

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apt-get install -y apt-transport-https ca-certificates curl

安装 kubeadm

添加库

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curl -s https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add -

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tee /etc/apt/sources.list.d/kubernetes.list <<-'EOF'
deb https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial main
EOF

更新源

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apt-get update

安装 kubelet, kubeadm, kubectl

查看版本

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apt-cache madison kubectl|grep 1.22

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apt-get install -y kubelet=1.22.16-00 kubeadm=1.22.16-00 kubectl=1.22.16-00
apt-mark hold kubelet kubeadm kubectl

kubeadm init

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kubeadm init \
 --image-repository registry.aliyuncs.com/google_containers \
 --kubernetes-version v1.22.16 \
 --pod-network-cidr=192.168.0.0/16

如果用 containerd 的话

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kubeadm init \
--image-repository registry.aliyuncs.com/google_containers \
--kubernetes-version v1.22.16 \
--pod-network-cidr=192.168.0.0/16 \
--cri-socket /run/containerd/containerd.sock

使用

普通用户

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mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

root 用户

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export KUBECONFIG=/etc/kubernetes/admin.conf

取消节点污点

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kubectl taint nodes --all node-role.kubernetes.io/master-
kubectl taint nodes --all node-role.kubernetes.io/control-plane- node-role.kubernetes.io/master-

安装 calico cni plugin

https://docs.projectcalico.org/getting-started/kubernetes/quickstart

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kubectl create -f https://docs.projectcalico.org/manifests/tigera-operator.yaml
kubectl create -f https://docs.projectcalico.org/manifests/custom-resources.yaml

添加节点

master

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kubeadm token create --print-join-command
kubeadm token list

node

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kubeadm join --token <token> <control-plane-host>:<control-plane-port> --discovery-token-ca-cert-hash sha256:<hash>
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