1.打開系統防火牆 HTTP 和 SSH 的訪問,安裝postfix
sudo yum install curl policycoreutils policycoreutils-python openssh-server openssh-clients sudo systemctl enable sshd sudo systemctl start sshd sudo yum install postfix sudo systemctl enable postfix sudo systemctl start postfix sudo firewall-cmd --permanent --add-service=http sudo systemctl reload firewalld
2.下載gitlab rpm安裝文件
crul下載：
> curl -s https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.rpm.sh | sudo bash > sudo yum install gitlab-ce-10.1.0-ce.0.el7.x86_64
rpm下載
curl -LJO https://mirrors.tuna.tsinghua.edu.cn/gitlab-ce/yum/el7/gitlab-ce-10.1.0-ce.0.el7.x86_64.rpm rpm -i gitlab-ce-10.1.0-ce.0.el7.x86_64.rpm
如果下載失敗，可以到https://packages.gitlab.com/gitlab/gitlab-ce手動下載，再用 rpm的方式自己安裝
出現 It looks like… 表示安裝成功！
3.配置 gitlab
vi /etc/gitlab/gitlab.rb
把external_url改成部署機器的域名或者IP地址。
4.對GitLab進行重配置 （這一步也是啟動 GitLab）
gitlab-ctl reconfigure
遇到的坑：
ruby_block[supervise_redis_sleep] action run，會一直卡無法往下進行
解決方案：
1、按住CTRL+C強制結束；
2、運行：sudo systemctl restart gitlab-runsvdir；
3、再次執行：sudo gitlab-ctl reconfigure
PG::ConnectionBad: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/var/opt/gitlab/postgresql/.s.PGSQL.5432"?
/opt/gitlab/embedded/service/gitlab-rails/lib/tasks/gitlab/db.rake:49:in `block (3 levels) in <top (required)>'
/opt/gitlab/embedded/bin/bundle:23:in `load'
/opt/gitlab/embedded/bin/bundle:23:in `<main>'
Tasks: TOP => gitlab:db:configure
(See full trace by running task with --trace)
STDERR:
---- End output of "bash" "/tmp/chef-script20171027-3190-3qzkrj" ----
Ran "bash" "/tmp/chef-script20171027-3190-3qzkrj" returned 1
找不到文件 /var/opt/gitlab/postgresql/.s.PGSQL.5432
懷疑可能是執行的時候沒有權限創建
sudo chmod 755 postgresql/
參考：
1.http://blog.csdn.net/u011241606/article/details/51471367
2.https://www.gitlab.cc/installation/#centos-7
3.http://www.cnblogs.com/springwind2006/p/6872773.html
4.https://isempty.me/archives/605