为yum添加Gitlab下载源
vim /etc/yum.repos.d/gitlab-ce.repo

[gitlab-ce]
name=Gitlab CE Repository
baseurl=https://mirrors.tuna.tsinghua.edu.cn/gitlab-ce/yum/el$releasever/
gpgcheck=0
enabled=1
[root@localhost ~]# yum makecache

yum安装Gitlab
yum install gitlab-ce

配置Gitlab
vim /etc/gitlab/gitlab.rb

• 配置域名或ip地址
  external_url 'https://gitlab.xxx.cn' or extrenal_url 'https://192.168.xxx.xxx:xxxx'

配置防火墙
若上一步设置的为ip地址即端口，则要把端口加入防火墙，并重启防火墙

• 关闭防火墙 systemctl stop firewalld.service
• 开启端口 firewall-cmd --zone=public --add-port=xxxx/tcp --permanent
• 开启防火墙 systemctl start firewalld.service

刷新配置
systemctl restart gitlab-runsvdir
gitlab-ctl reconfigure

启动服务
gitlab-ctl restart
gitlab-ctl status