$ systemctl stop firewalld # 临时
$ systemctl disable firewalld # 永久

2.2、关闭 selinux

$ sed -i 's/enforcing/disabled/' /etc/selinux/config # 永久
$ setenforce 0 # 临时

2.3、关闭 swap

$ swapoff -a # 临时
$ vim /etc/fstab # 永久

2.4、主机名

$ hostnamectl set-hostname <hostname>

2.5、添加 hosts

$ cat >> /etc/hosts << EOF
192.168.xx.xx dhf1
192.168.xx.xx dhf2
192.168.xx.xx dhf3
192.168.xx.xx dhf4
192.168.xx.xx dhf5
192.168.xx.xx dhf6
192.168.xx.xx dhf7
EOF

2.6、将桥接的 IPv4 流量传递到 iptables 的链

$ cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1net.bridge.bridge-nf-call-iptables = 1
EOF
$ sysctl --system # 生效

2.7、时间同步

$ yum install ntpdate -y
$ ntpdate time.windows.com

3、所有节点安装 Docker/kubeadm/kubelet

$ 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-18.06.1.ce-3.el7
$ systemctl enable docker && systemctl start docker
$ docker --version

3.2、添加阿里云 YUM 软件源

$ cat > /etc/docker/daemon.json << EOF
{
"registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF

添加 yum 源

$ cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetesbaseurl=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

3.3、安装 kubeadm，kubelet 和 kubectl

$ yum install -y kubelet kubeadm kubectl
$ systemctl enable kubelet

4、部署 Kubernetes Master

$ kubeadm init \
--apiserver-advertise-address=192.168.xx.xx \
--image-repository registry.aliyuncs.com/google_containers \
--kubernetes-version v1.17.0 \
--service-cidr=10.96.0.0/12 \
--pod-network-cidr=10.244.0.0/16

由于默认拉取镜像地址 k8s.gcr.io 国内无法访问，这里指定阿里云镜像仓库地址。

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

5、安装 Pod 网络插件（CNI）

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

6、加入 Kubernetes Node

kubeadm join 192.168.255.227:6443 --token o04swe.mal5smmpv8v0wv16 --discovery-token-ca-cert-hash sha256:7eedb63dcbefb3ff814d2ad01a0ac8ae4c16c037e92250a93d99718b4d51bb8b

7、测试 kubernetes 集群

$ kubectl create deployment nginx --image=nginx
$ kubectl expose deployment nginx --port=80 --type=NodePort
$ kubectl get pod,svc

访问地址：http://NodeIP:Port

至此完成