基礎： 三臺2核2G虛擬機器 CentOS 7 192.168.5.101 192.168.5.102 192.168.5.103 一、基礎配置(所有節點都關閉) 1、關閉防火牆、selinux、SWAP systemctl stop firewalld && systemctl disable firewalld && setenforce 0 sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config swapoff -a sed -i 's/.*swap.*/#&/' /etc/fstab 2、核心開啟網路支援 cat <<EOF > /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF sysctl -p /etc/sysctl.conf 3、設定 /etc/hosts 192.168.5.101 node101 192.168.5.102 node102 192.168.5.103 node103 二、Docker部署 1、安裝依賴與映象 yum install -y yum-utils yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo 2、安裝軟體包 yum install -y docker-ce docker-ce-cli containerd.io #預設安裝最新版本，可以指定安裝版本 #檢視可以安裝哪些版本 yum list docker-ce --showduplicates|sort -r yum install -y docker-ce-18.09.9-3.el7 docker-ce-cli-18.09.9-3.el7 containerd.io 3、啟動Docker systemctl enable docker && systemctl start docker 4、修改Cgroup Driver cat > /etc/docker/daemon.json <<EOF { "exec-opts": ["native.cgroupdriver=systemd"] } EOF systemctl restart docker 注意：Docker預設驅動是cgroupfs，由於k8s推薦是systemd，需要修改 三、安裝kubeadm部署K8S叢集 #k8s阿里雲映象

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
        http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
 

EOF

#安裝指定版本 yum list kubelet --showduplicates | sort -r yum install -y kubelet-1.18.20 kubeadm-1.18.20 kubectl-1.18.20 systemctl enable kubelet && systemctl start kubelet

cat <<EOF > kubeadm.yaml
apiVersion: kubeadm.k8s.io/v1beta2
kind: InitConfiguration
nodeRegistration:
  KubeletExtraArgs:
    cgroup-driver: "systemd"
---
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
kubernetesVersion: v1.18.20
clusterName: "kubernetes"
controllerManager:
  extraArgs:
    horizontal-pod-autoscaler-sync-period: "10s"
    node-monitor-grace-period: "10s"
apiServer:
 extraArgs:
   runtime-config: "api/all=true"
networking:
  podSubnet: "172.36.0.0/16"
  serviceSubnet: 10.96.0.0/12
imageRepository: k8s.gcr.io
scheduler: {}
EOF

systemctl enable kubelet && systemctl start kubelet #初始化Master節點 kubeadm init --config kubeadm.yaml 四、安裝網路外掛 wget https://raw.githubusercontent.com/cloudnativelabs/kube-router/master/daemonset/kubeadm-kuberouter.yaml kubectl apply -fkubeadm-kuberouter.yaml