系统：
CentOS下载地址：
https://wiki.centos.org/Download
CentOS 7
http://mirrors.aliyun.com/centos/7.8.2003/isos/x86_64/
Gitlab:
安装最新版本请参考官方安装说明
https://about.gitlab.com/install/#centos-7
历史版本查询地址
https://packages.gitlab.com/gitlab/gitlab-ce
安装步骤：
1、安装和配置必要的依赖项
sudo yum install -y curl policycoreutils-python openssh-server
sudo systemctl enable sshd
sudo systemctl start sshd
sudo firewall-cmd --permanent --add-service=http
sudo firewall-cmd --permanent --add-service=https
sudo systemctl reload firewalld
2、安装wget
yum install wget
3、下载安装包
wget --content-disposition https://packages.gitlab.com/gitlab/gitlab-ce/packages/el/7/gitlab-ce-13.1.0-ce.0.el7.x86_64.rpm/download.rpm
4、安装
sudo yum install gitlab-ce-13.1.0-ce.0.el7.x86_64.rpm
5、修改访问地址
sudo vi /etc/gitlab/gitlab.rb
gitlab-ctl reconfigure
gitlab-ctl restart
6、可以使用IP地址进行访问了