K8S 集群搭建脚本

#!/bin/bash

# 初始化环境
#==============初始化环境=================
echo -e "\e[1;31m==============初始化环境=================\e[0m"
#关闭防火墙：
echo -e "\e[1;31m<<==== 关闭防火墙，并关闭防火墙开机自己启动 ====>>\e[0m" &&
systemctl stop firewalld && 
systemctl disable firewalld &&

#关闭SELinux
echo -e "\e[1;31m<<==== 关闭SELinux，并关闭SELinux开机自己启动 ====>>\e[0m" &&
setenforce 0 &&
sed -i "s/enforcing/disabled/g" /etc/selinux/config 

#关闭swap分区
echo -e "\e[1;31m<<==== 关闭SELinux，并关闭SELinux开机自己启动 ====>>\e[0m" &&
swapoff -a &&
sed -i ‘s/.*swap.*/#&/‘ /etc/fstab &&


#yum 安装sshpass、wget等必要软件包:
yum -y install sshpass wget &&


# << ========================================================= 主机名设置以及 hosts 文件中记录的添加 ===========================================>>
#此条清空规则仅在测试时添加，如果是实际操作，请删除此条
#> /etc/hosts
#======================================

> /root/host
read -p  "请您输入您当前Master节点上用于与Node节点通讯的IP：" Master_IP
echo "#K8S搭建集群所用到的解析" >> /etc/hosts
#先将本地的master节点的主机解析写入到hosts文件中：
echo "$Master_IP master " >> /etc/hosts


echo "Please enter your node mount(本次及之后的输入过程中如您输入出错，您可以按Ctrl+Backspace按键删除输入出错的参数再次输入正确的参数):"
read mount
echo -e "\e[1;31m你的子节点个数是 : $mount 个\e[0m"

i=1
while [ $i -le  $mount ]
do
read -p "Enter your 第 $i 个Node节点的IP: " Ip
echo "$Ip  node$i" >> /etc/hosts && echo "$Ip" >> /root/host
let i+=1	
done



#循环确认密码并复制hosts文件到输入密码后的机器：
i=1
while [ $i -le  $mount ]
do
read -s -p "输入您Node_IP为：`sed -n "$i"p /root/host`机器的密码: " Passwd
echo ‘\n‘
#将添加的hosts文件复制到Node结点上：
/usr/bin/sshpass -p$Passwd scp -o stricthostkeychecking=no /etc/hosts  root@`sed -n "$i"p /root/host`:/etc/hosts 
echo "hosts文件已复制到Node节点上"
let i+=1
done

echo "设置主机名"
hostnamectl set-hostname master

echo "设置内核参数"
cat > /etc/sysctl.d/k8s.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system

echo "配置国内yum源"
#配置国内yum源
yum install -y wget
mkdir /etc/yum.repos.d/bak && mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.cloud.tencent.com/repo/epel-7.repo
yum clean all && yum makecache

echo "配置国内Kubernetes源"
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=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

echo "配置 docker 源:"
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo

echo "安装docker"
#安装docker
yum install -y docker-ce-18.06.1.ce-3.el7
systemctl enable docker && systemctl start docker
docker –version

echo "安装kubeadm、kubelet、kubectl"
#安装kubeadm、kubelet、kubectl
yum install -y kubelet kubeadm kubectl
systemctl enable kubelet

echo "初始化安装master节点："
#初始化安装master节点：
kubeadm init --kubernetes-version=1.15.3 --apiserver-advertise-address=$Master_IP --image-repository registry.aliyuncs.com/google_containers --service-cidr=10.1.0.0/16 --pod-network-cidr=10.244.0.0/16