（1）主机名配置
hostnamectl set-hostname gitlab-server
hostnamectl set-hostname jenkins-server
hostnamectl set-hostname harbor-server
hostnamectl set-hostname web-server
（2）ip地址配置（静态）
查看ip
ip a
vim /etc/sysconfig/network-scripts/ifcfg-ens33
cat /etc/sysconfig/network-scripts/ifcfg-ens33
BOOTPROTO="static" 配置为静态IP
IPADDR=192.168.19.128
PREFIX=24
GATEWAY=192.168.19.2
DNS1=8.8.8.8
DNS2=114.114.114.114
重启网络
systemctl restart network.service
BOOTPROTO="static" 配置为静态IP
IPADDR=192.168.19.129
PREFIX=24
GATEWAY=192.168.19.2
DNS1=8.8.8.8
DNS2=114.114.114.114
重启网络
systemctl restart network.service
BOOTPROTO="static" 配置为静态IP
IPADDR=192.168.19.130
PREFIX=24
GATEWAY=192.168.19.2
DNS1=8.8.8.8
DNS2=114.114.114.114
重启网络
systemctl restart network.service
BOOTPROTO="static" 配置为静态IP
IPADDR=192.168.19.131
PREFIX=24
GATEWAY=192.168.19.2
DNS1=8.8.8.8
DNS2=114.114.114.114
重启网络
systemctl restart network.service
多个ip问题解决：
解决：将配置文件中的BOOTPROTO的值改成static，重启网卡就可以了
systemctl restart network
（3）主机名和ip地址解析配置
vim /etc/hosts
cat /etc/hosts
192.168.19.128 gitlab-server
192.168.19.129 jenkins-server
192.168.19.130 harbor-server
192.168.19.131 web-server
（4）防火墙禁用
systemctl stop firewalld;systemctl disable firewalld
firewall-cmd --state
（5）SELinux禁用
vim /etc/sysconfig/selinux
将SELINUX=enforcing指令更改为SELINUX=disabled
sestatus
（6）时间同步
crontab -l
crontab -e
0 */1 * * * ntpdate time1.aliyun.com
说明：分时日月周