1. 禁用 swap

sudo swapoff -a

2. 禁用防火墙

sudo systemctl stop firewalld
sudo systemctl disable firewalld

3. 将 SELinux 设置为 permissive 模式

sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

4. 安装cri-o

卸载 podman、runc 等容器运行时

sudo dnf remove -y podman runc cri-o docker-ce libcgroup cri-dockerd

安装cri-o

sudo dnf install -y conmon containers-common
sudo rpm -ivh https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/1.26:/1.26.2/Fedora_37/x86_64/cri-o-1.26.2-2.1.fc37.x86_64.rpm

编辑 crio，添加最后两个值，

sudo vi /etc/crio/crio.conf

--- add
[crio.runtime]
conmon_cgroup = "pod"
cgroup_manager = "systemd"
---

重启 crio，

sudo systemctl daemon-reload
sudo systemctl enable --now crio
sudo systemctl status crio

5. 安装kubelet kubeadm kubectl

cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
enabled=1
gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl
EOF

sudo dnf install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
sudo systemctl enable --now kubelet

6. 更新模块设置

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

对模块使用 modprobe，

sudo modprobe overlay
sudo modprobe br_netfilter
sudo modprobe ip_tables
sudo modprobe iptable_filter

为 k8s.conf 设置 sysctl.d，

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF

应用 sysctl 参数，无需重启，

sysctl --system

7. 初始化Kubernetes集群

sudo su -
export PUBLIC_IP=YOUR_PUBLIC_IP

export HOST=`hostname`

cat <<EOF > kubeadm-config.yaml
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
cgroupDriver: systemd
---
apiVersion: kubeadm.k8s.io/v1beta3
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: $PUBLIC_IP
  bindPort: 6443
nodeRegistration:
  criSocket: unix:///var/run/crio/crio.sock
  imagePullPolicy: IfNotPresent
  name: $HOST
  taints: null
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta3
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns: {}
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: registry.k8s.io
kind: ClusterConfiguration
kubernetesVersion: 1.27.1
networking:
  dnsDomain: cluster.local
  podSubnet: 10.244.0.0/16
  serviceSubnet: 10.96.0.0/12
scheduler: {}
EOF

使用 kubeadm 初始化 kubernetes 集群，

kubeadm init --config kubeadm-config.yaml

8. 配置集群访问

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

kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null
echo 'alias k=kubectl' >>~/.bashrc
echo 'complete -o default -F __start_kubectl k' >>~/.bashrc

移除 taint，

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

9. 安装网络插件

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

10. 验证集群

kubectl get nodes
kubectl get pods -A

完结！