1.分别修改三台机器的hostname为后期的ssh命令执行做准备

[root@VM-16-13-centos ~]# vim /etc/hostname

修改后重启生效

2.配置hosts名称解析

 

使用scp命令复制hosts文件

[root@controller ~]# for i in 172.21.16.8 172.21.16.3; do scp -p /etc/hosts $i:/etc/hosts; done

 

3.配置ssh免密

[root@controller ~]# ssh-keygen -t rsa

 

[root@controller ~]# ls -a

[root@controller ~]# cd .ssh/

[root@controller .ssh]# mv id_rsa.pub authorized_keys

 

复制配置文件

[root@controller ~]# for i in controller compute1 block1

> do

> scp -r /root/.ssh/authorized_keys $i:/root/

> done

 

打通三台机器的ssh路径

[root@controller ~]# for i in controller compute1 block1

> do

> ssh $i hostname

> done

   每一台机器都要执行

 

4.关闭selinux和firewalld 腾讯云的selinux默认是关闭的不用管

[root@controller ~]# for i in controller compute1 block1; do ssh $i systemctl stop firewalld; ssh $i systemctl disable firewalld; done

查看防火墙状态

[root@controller ~]# for i in controller compute1 block1; do ssh $i hostname; ssh $i systemctl status firewalld; done

 

5.配置yum源

[root@controller ~]# bash yum.sh

!/bin/bash

for i in controller compute1 block1
do
ssh $i hostname
ssh $i mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup 
ssh $i wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
ssh $i rm -rf /etc/yum.repos.d/CentOS-Epel.repo
ssh $i sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
ssh $i yum clean all
ssh $i yum makecache
ssh $i yum repolist 
done

6.设置时间同步

[root@compute1 ~]# vim /etc/chrony.conf

server ntp6.aliyun.com iburst

allow 本机第一张网卡的网段/16

文件同步、服务重启、验证

[root@compute1 ~]# for i in compute1 block1 ; do scp -p /etc/chrony.conf $i:/etc/chrony.conf; ssh $i systemctl restart chronyd; ssh $i hostname; ssh $i chronyc sources; done

从时间服务器验证