gitlab 官网 https://about.gitlab.com/gitlab-com
官方安装文档 https://about.gitlab.com/installation/?version=ce#centos-7(ce/ee)
vim /etc/yum.repos.d/gitlab.repo
[gitlab-ce]
name=gitlab-ce
baseurl=http://mirrors.tuna.tsinghua.edu.cn/gitlab-ce/yum/el7
Repo_gpgcheck=0
Enabled=1
Gpgkey=https://packages.gitlab.com/gpg.key
原文：http://blog.51cto.com/13480443/2090673