修改主机名

vim /etc/hostname

-> k8s-master

reboot

uname -n

添加主机名与IP对应关系（记得设置主机名）

vim /etc/hosts

123.57.31.168 ? ?k8s-master

关闭 swap

sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

swapoff -a

关闭防火墙

systemctl stop firewalld

systemctl disable firewalld

firewall-cmd --state

将桥接的IPv4流量传递到 iptables 的链：

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

设置仓库

sudo yum install -y yum-utils \

device-mapper-persistent-data \

lvm2

设置淘宝镜像

sudo yum-config-manager \

--add-repo \

http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

安装 Docker

curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

sudo systemctl start docker

sudo systemctl daemon-reload

sudo systemctl restart docker

sudo systemctl enable docker

添加 kubernetes 阿里云YUM软件源

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

将 SELinux 设置为 permissive 模式（相当于将其禁用）

setenforce 0

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

yum update -y

yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes

systemctl enable --now kubelet