一、准备工作：
1、创建三台虚拟机：(在node1配置好环境，然后关机克隆出node2、node3、并修改网卡、主机名即可）
linux-node1.example.com 192.168.43.21
linux-node2.example.com 192.168.43.22
linux-node3.example.com 192.168.43.23
设置主机名：
[root@linux-node1 ~]# hostnamectl set-hostname linux-node1.example.com
2、配置IP：
[root@linux-node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens32
TYPE=Ethernet
BOOTPROTO=static
NAME=ens32
DEVICE=ens32
ONBOOT=yes
IPADDR=192.168.43.21
NETMASK=255.255.255.0
GATEWAY=192.168.43.2
DNS1=192.168.43.2
3、关闭NetworkManager、firewalld、selinux等
[root@linux-node1 ~]# systemctl disable NetworkManager
[root@linux-node1 ~]# systemctl disable firewalld
[root@linux-node1 ~]# vim /etc/selinux/config ---->SELINUX=enforcing
4、设置主机名解析：
[root@linux-node1 ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.43.21 linux-node1 linux-node1.example.com
192.168.43.22 linux-node2 linux-node2.example.com
192.168.43.23 linux-node3 linux-node3.example.com
5、安装epel扩展源和常用的命令
[root@linux-node1 ~]# rpm -ivh
http://mirrors.aliyun.com/epel/epel-release-latest-7.noarch.rpm
[root@linux-node1 ~]# yum install -y net-tools vim lrzsz tree screenlsof tcpdumpnc mtr nmap
6、安装Docker
[root@linux-node1 ~]# cd /etc/yum.repos.d/
[root@linux-node1 yum.repos.d]# wget
https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
[root@linux-node1 yum.repos.d]# yum install -y docker-ce
[root@linux-node1 yum.repos.d]# systemctl start docker
[root@linux-node1 yum.repos.d]# systemctl enabled docker
7、创建部署目录
[root@linux-node1 ~]# mkdir -p /opt/kubernetes/{cfg,bin,ssl,log} #cfg存放配置文件；bin存放二进制文件；ssl存放证书文件；log存放日志文件。
8、关机---克隆出两台linux-node2、linux-node3并修改主机名、网卡
linux-node2：
[root@linux-node1 ~]# shutdown -h now
[root@linux-node1 ~]# hostnamectl set-hostname linux-node2.example.com #修改主机名
[root@linux-node1 ~]# su -
[root@linux-node2 ~]# hostnamectl
Static hostname: linux-node2.example.com
Icon name: computer-vm
Chassis: vm
Machine ID: 09bb654cb3f7445e9a9abd9dd32b9e2c
Boot ID: 939c901cfa7246dda1e90946ac6f3b08
Virtualization: vmware
Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-693.el7.x86_64
Architecture: x86-64
[root@linux-node2 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens32
TYPE=Ethernet
BOOTPROTO=static
NAME=ens32
DEVICE=ens32
ONBOOT=yes
IPADDR=192.168.43.22
NETMASK=255.255.255.0
GATEWAY=192.168.43.2
DNS1=192.168.43.2
linux-node3：
[root@linux-node1 ~]# hostnamectl set-hostname linux-node3.example.com #修改主机名
[root@linux-node1 ~]# su -
[root@linux-node3 ~]# hostnamectl
Static hostname: linux-node3.example.com
Icon name: computer-vm
Chassis: vm
Machine ID: 09bb654cb3f7445e9a9abd9dd32b9e2c
Boot ID: 939c901cfa7246dda1e90946ac6f3b08
Virtualization: vmware
Operating System: CentOS Linux 7 (Core)
CPE OS Name: cpe:/o:centos:centos:7
Kernel: Linux 3.10.0-693.el7.x86_64
Architecture: x86-64
[root@linux-node3 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens32
TYPE=Ethernet
BOOTPROTO=static
NAME=ens32
DEVICE=ens32
ONBOOT=yes
IPADDR=192.168.43.23
NETMASK=255.255.255.0
GATEWAY=192.168.43.2
DNS1=192.168.43.2