超簡單帶你入門Kubernetes! - Kubeadm 安裝 Production kubernetes 篇

禁用swap

sudo swapoff -a
sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

啟動 Kernel 的ip轉送

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
EOF

安裝 kubelet kubeadm kubectl

• 先安裝必要套件ca-certificates curl gpg、加入公鑰使其可以apt下載最後再安裝

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

sudo mkdir -p -m 755 /etc/apt/keyrings

curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.31/deb/Release.key | sudo gpg --dearmor | sudo tee /etc/apt/keyrings/kubernetes-apt-keyring.gpg > /dev/null

echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.31/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list

sudo apt-get install kubelet kubeadm kubectl -y

sudo apt-mark hold kubelet kubeadm kubectl 

安裝 Container Runtime Interface

sudo sh -c "containerd config default > /etc/containerd/config.toml"
sudo sed -i 's/ SystemdCgroup = false/ SystemdCgroup = true/' /etc/containerd/config.toml
sudo systemctl restart containerd.service kubelet.service

sudo systemctl enable kubelet.service

初始化 Control Plane

1. 先存 kubeadm-config.yaml

apiVersion: kubeadm.k8s.io/v1beta3

kind: ClusterConfiguration

networking:

podSubnet: "10.244.0.0/16"

2. 根據config初始化control plane

sudo kubeadm init --config kubeadm-config.yaml

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

kubeadm join 192.168.5.10:6443 --token xyyen7.ivoe91bt7f1gcslm \
	--discovery-token-ca-cert-hash sha256:a896ae16f65f1c45a73f596f211efd12174b22769cc962da12f04e50f2d15835

(Optional) 安裝tools

• K9s

wget https://github.com/derailed/k9s/releases/download/v0.32.5/k9s_linux_amd64.deb

sudo dpkg -i k9s_linux_amd64.deb

• 自動完成

sudo apt-get install bash-completion -y

echo 'source <(kubectl completion bash)' >>~/.bashrc

echo 'alias k=kubectl' >>~/.bashrc

echo 'complete -o default -F __start_kubectl k' >>~/.bashrc

安裝 Pod Network

wget https://github.com/cilium/cilium-cli/releases/download/v0.16.19/cilium-linux-amd64.tar.gz
tar -xf cilium-linux-amd64.tar.gzaa
./cilium install --version 1.16.3

檢查狀態

./cilium status --wait

再回去看 K9s

所有的Status是Running就成功啦 🎉