官方檔案：安裝 kubeadm
安裝條件
- 多臺Linux機器 CentOS7
- 2G以上RAM，2個以上CPU
- 集群網路互通，可訪問外網
- 關閉防火墻，關閉swap磁區
準備安裝環境
| node | IP |
| k8s-master | 192.168.43.111 |
| k8s-node1 | 192.168.43.112 |
| k8s-node2 | 192.168.43.113 |
以下命令在三個主機上運行
關閉防火墻
systemctl stop firewalld && systemctl disable firewalld
關閉selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config # 永久 setenforce 0 # 臨時
關閉swap
swapoff -a # 臨時 vi /etc/fstab # 永久
設定主機名
hostnamectl set-hostname <hostname>
添加hosts
cat >> /etc/hosts << EOF 192.168.43.111 k8s-master 192.168.43.112 k8s-node1 192.168.43.113 k8s-node2 EOF
允許 iptables 檢查橋接流量
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf br_netfilter EOF
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF
sudo sysctl --system
安裝Docker
yum install wget -y wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo yum -y install docker-ce systemctl enable docker && systemctl start docker
配置Docker
cat > /etc/docker/daemon.json << EOF { "exec-opts": ["native.cgroupdriver=systemd"], "log-driver": "json-file", "log-opts": { "max-size": "100m" }, "storage-driver": "overlay2", "registry-mirrors": ["https://vydiw6v2.mirror.aliyuncs.com"] } EOF
systemctl restart docker
安裝kubeadm，kubelet和kubectl
添加阿里yum源cat > /etc/yum.repos.d/kubernetes.repo << EOF [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 https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF
sudo yum install -y kubelet-1.23.0 kubeadm-1.23.0 kubectl-1.23.0 --disableexcludes=kubernetes sudo systemctl enable --now kubelet
以下命令在master主機上運行
初始化master
https://kubernetes.io/zh/docs/reference/setup-tools/kubeadm/kubeadm-init/ kubeadm init \ --apiserver-advertise-address=192.168.43.111 \ --image-repository registry.aliyuncs.com/google_containers \ --kubernetes-version v1.23.0 \ --service-cidr=10.96.0.0/12 \ --pod-network-cidr=10.244.0.0/16 \ --ignore-preflight-errors=all vi /etc/profile export KUBECONFIG=/etc/kubernetes/admin.conf source /etc/profile
kubectl get nodes
以下命令在node主機上運行
加入node
執行master init之后的join命令kubeadm join 192.16...........
重新獲取join命令
kubeadm token create --print-join-command
master上安裝容器網路
https://kubernetes.io/zh/docs/concepts/cluster-administration/networking/#how-to-implement-the-kubernetes-networking-modelwget https://projectcalico.docs.tigera.io/manifests/tigera-operator.yaml --no-check-certificate wget https://projectcalico.docs.tigera.io/manifests/custom-resources.yaml --no-check-certificate
修改pod網路calicoNetwork
kubectl create -f tigera-operator.yaml
kubectl create -f custom-resources.yaml
驗證
kubectl get pods -n kube-system
kubectl get nodes -o wide
測驗集群
kubectl create deployment nginx --image=nginx kubectl expose deployment nginx --port=80 --type=NodePort kubectl get pod,svc
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