在CentOS上高效部署Kubernetes(k8s)集群,可以参考以下步骤和最佳实践:
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install -y docker-ce docker-ce-cli containerd.io
systemctl start docker
systemctl enable docker
cat <<EOF | sudo tee /etc/docker/daemon.json
{
"exec-opts": ["native.cgroupdriversystemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2"
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF
sudo sysctl --system
sed -i 's/enforcing/disabled/' /etc/selinux/config
swapoff -a
sudo sed -i 's/.*swap.*/#&/' /etc/fstab
hostnamectl set-hostname k8s-master
cat >> /etc/hosts <<EOF
192.168.1.100 k8s-master
192.168.1.101 k8s-node1
192.168.1.102 k8s-node2
EOF
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
EOF
yum install -y kubelet kubeadm kubectl --nogpgcheck
systemctl enable kubelet
systemctl start kubelet
kubeadm init --apiserver-advertise-address 192.168.1.100 --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.22.0 --service-cidr 10.96.0.0/12 --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
在Master节点上初始化完成后,会输出Join命令,复制该命令到Worker节点上执行。
kubeadm join 192.168.1.100:6443 --token <token> --discovery-token-ca-cert-hash sha256:<hash>
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubectl get nodes
kubectl get pods --all-namespaces -o wide
通过以上步骤,你可以在CentOS上成功部署一个基本的Kubernetes集群。请根据你的实际需求和环境调整配置和版本。