导读：集群搭建比较常用的功能，主要作用就是安装好一个节点将配置好的软件信息scp到其它节点上，然后修改下相关的主机名即可。

1、服务器列表

2、添加Hosts文件

3、关闭防火墙

#三台服务器执行相同操作

# 临时关闭

开启：systemctl start firewalld
关闭：systemctl stop firewalld

# 永久关闭

关闭：systemctl disable firewalld
开启：systemctl enable firewalld

4、主机名修改

#三台服务器执行相同操作

1、 hostnamectl set-hostname test001

2、”hostname=test001″ >> /etc/sysconfig/network #如果有则修改

5、创建用户

#三台服务器执行相同操作

useradd -m test

6、静态IP配置

#由于使用的是虚拟机，所以需要设置静态IP，三台服务器都需要设置

1、vim /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE=Ethernet

NAME=ens33 #此处根据ifconfig查看

BOOTPROTO=static

IPV6INIT=no

ONBOOT=yes

IPADDR=xxx.xxx.xxx.129

NETMASK=255.255.255.0

HWADDR=

UUID=

DEVICE=ens33

DNS1=xxx.xxx.xxx.2 #route -n命令查看

2、vim /etc/sysconfig/network

NETWORKING=yes

GATEWAY=xxx.xxx.xxx.2

3、vim /etc/resolv.conf

nameserver=xxx.xxx.xxx.2

7、密钥生成

#三台服务器执行相同操作

1、切换到需要生成密钥的用户

[root@test001 app]# su – test

Last login: Mon Jun 21 14:27:12 CST 2021 on pts/0

2、密钥生成，生成过程一直回车即可，除非指定特殊情况。

[test@test001 ~]$ ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/home/test/.ssh/id_rsa):

Created directory ‘/home/test/.ssh’.

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /home/test/.ssh/id_rsa.

Your public key has been saved in /home/test/.ssh/id_rsa.pub.

The key fingerprint is:

SHA256:J9MGK9lSw9TWI6iHwuWOEL4XVY4seRCdTnz/4jNlaws test@test001

The key’s randomart image is:

+—[RSA 2048]—-+

| o+ ooo . |

| . +B=o + o |

| . oo*++*o . . |

| o +o=+.=. |

| o =+.S +. |

| . o .o =. + |

| . .E+ . |

| +.o |

| +.. |

+—-[SHA256]—–+

8、免密配置

1、authorized_keys、known_hosts 文件生成

cat ${HOME}/.ssh/id_rsa.pub >> ${HOME}/.ssh/authorized_keys

ssh test@test002 cat ${HOME}/.ssh/id_rsa.pub >> ${HOME}/.ssh/authorized_keys

ssh test@test003 cat ${HOME}/.ssh/id_rsa.pub >> ${HOME}/.ssh/authorized_keys

2、目录权限设置

chmod 700 ${HOME}/.ssh

chmod 600 ${HOME}/.ssh/authorized_keys

3、authorized_keys、known_hosts文件复制

scp ${HOME}/.ssh/authorized_keys test@test002:${HOME}/.ssh/

scp ${HOME}/.ssh/known_hosts test@test002:${HOME}/.ssh/

scp ${HOME}/.ssh/authorized_keys test@test003:${HOME}/.ssh/

scp ${HOME}/.ssh/known_hosts test@test003:${HOME}/.ssh/

9、免密测试

[test@test003 ~]$ ssh test@test001

Last login: Mon Jun 21 16:49:39 2021

[test@test001 ~]$ exit;

logout

Connection to test001 closed.

[test@test003 ~]$ ssh test@test002

Last login: Mon Jun 21 19:11:52 2021

[test@test002 ~]$ exit;

logout

Connection to test002 closed.

总结：整体安装过程虽然比较繁琐，但是所涉及到的基础知识点有很多。

另外大家如果想要学习大数据哪方面的东西可以给我留言。