Shell脚本一键部署KubeSphere前置环境

1. 服务器环境

[root@localhost~]# cat  /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)

2. 脚本内容

#!/bin/bash

#本文针对CentOS7系统

#1）关闭交换分区swap
#有的话需要关闭掉，本文在创建虚拟机时已关闭
disable_swap(){
   echo -e "\e[32m1）开始关闭swap\e[0m"
	echo  "ok"
}


#2)关闭防火墙
disable_firewalld(){
   echo -e "\e[32m2）开始关闭firewalld\e[0m"
	systemctl   disable   firewalld   --now
}


#3)关闭selinux
disable_selinux(){
   echo -e "\e[32m3）开始关闭selinux\e[0m"
	sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
}


#4）配置hosts文件【根据实际情况配置】
config_hosts(){
   echo -e "\e[32m4）开始配置hosts\e[0m"
	cat >> /etc/hosts <<EOF
10.10.14.151  test-master151
10.10.14.154  test-node154
10.10.14.155  test-node155
10.10.14.156  test-node156
10.10.14.157  test-node157
10.10.14.132  k8s-registry132
EOF
}


#5)配置阿里云yum源
config_aliyun_yum(){
   echo -e "\e[32m5）开始配置阿里云yum源\e[0m"
	mkdir   -p  /etc/yum.repos.d/bak
	mv   /etc/yum.repos.d/CentOS*   /etc/yum.repos.d/bak/
	cd  /etc/yum.repos.d  && curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
	yum  clean  all
	yum  makecache  fast
}


#6）配置chrony时间同步
config_chrony(){
   echo -e "\e[32m6）开始配置chrony时间同步\e[0m"
	yum   -y   install    chrony  
	cat  >   /etc/chrony.conf <<EOF
server ntp.aliyun.com iburst
stratumweight 0
driftfile /var/lib/chrony/drift
rtcsync
makestep 10 3
bindcmdaddress 127.0.0.1
bindcmdaddress ::1
keyfile /etc/chrony.keys
commandkey 1
generatecommandkey
logchange 0.5
logdir /var/log/chrony
EOF
	systemctl    enable    chronyd   --now
}


#7)yum安装工具包
install_base_rpm(){
   echo -e "\e[32m7）开始安装基础工具包\e[0m"
	yum   -y   install   socat   conntrack   telnet   wget  net-tools  screen  vim
}


#节点之间配置免密登录(可选)



#配置上述子项
config_all(){
	disable_swap
	disable_firewalld
	disable_selinux
	config_hosts
	config_aliyun_yum
	config_chrony
	install_base_rpm
}




check_config(){
   echo -e "\e[32m1）开始检查swap\e[0m"
   free   -m
   echo -e "\e[32m2) 开始检查firewalld\e[0m"
   iptables -L
   echo -e "\e[32m3) 开始检查selinux\e[0m"
   sestatus
   echo -e "\e[32m4) 开始检查hosts\e[0m"
   cat  /etc/hosts
   echo -e "\e[32m5) 开始检查yum源\e[0m"
   yum  repolist
   echo -e "\e[32m6) 开始检查chrony\e[0m"
   chronyc   sources -v
   echo -e "\e[32m7) 开始检查基础安装包\e[0m"
   rpm  -qa    conntrack-tools   socat
}



read -p '请输入需要部署的服务对应编号：
0-check_config;
1-disable_swap;
2-disable_firewalld;
3-disable_selinux;
4-config_hosts;
5-config_aliyun_yum;
6-config_chrony;
7-install_base_rpm:
8-config_all: '   num


case  "$num"   in
   0)
    check_config
   ;;
   1)
    disable_swap
   ;;
   2)
    disable_firewalld
   ;;
   3)
    disable_selinux
   ;;
   4)
    config_hosts
   ;;
   5)
    config_aliyun_yum
   ;;
   6)
    config_chrony
   ;;
   7)
    install_base_rpm
   ;;
   8)
    config_all
   ;;
   *)
    exit  1
   ;;
esac