GitLab是一个利用 Ruby on Rails 开发的开源应用程序，实现一个自托管的Git项目仓库，可通过Web界面进行访问公开的或者私人项目。

GitLab拥有与Github类似的功能，能够浏览源代码，管理缺陷和注释。可以管理团队对仓库的访问，它非常易于浏览提交过的版本并提供一个文件历史库。它还提供一个代码片段收集功能可以轻松实现代码复用，便于日后有需要的时候进行查找。

1、安装相关依赖

yum install curl policycoreutils openssh-server openssh-clients postfix
systemctl enable postfix
systemctl start postfix

2、添加GitLab仓库

curl -sS https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.rpm.sh | sudo bash

3、安装GitLab

yum install -y gitlab-ce 

4、配置GitLab

gitlab-ctl reconfigure

这一步执行时间较长。执行完后可以先查看下GitLab的状态

[root@localhost ~]# gitlab-ctl status
run: alertmanager: (pid 37068) 556s; run: log: (pid 26280) 1061s
run: gitaly: (pid 36057) 569s; run: log: (pid 24906) 1258s
run: gitlab-monitor: (pid 36992) 562s; run: log: (pid 25965) 1102s
run: gitlab-workhorse: (pid 36959) 565s; run: log: (pid 25681) 1132s
run: logrotate: (pid 25765) 1122s; run: log: (pid 25781) 1121s
run: nginx: (pid 25709) 1128s; run: log: (pid 25724) 1127s
down: node-exporter: 0s, normally up, want up; run: log: (pid 25866) 1115s
run: postgres-exporter: (pid 37083) 555s; run: log: (pid 26428) 1034s
run: postgresql: (pid 25127) 1246s; run: log: (pid 25173) 1243s
run: prometheus: (pid 37014) 561s; run: log: (pid 26155) 1077s
run: redis: (pid 24778) 1268s; run: log: (pid 24827) 1265s
run: redis-exporter: (pid 37003) 562s; run: log: (pid 26051) 1090s
run: sidekiq: (pid 25552) 1141s; run: log: (pid 25578) 1138s
run: unicorn: (pid 25469) 1146s; run: log: (pid 25496) 1145s

一切都正常后，可以通过http://ip进行访问，第一次进入需要设置root的密码，设置完后会重新进行登录。登录后的界面如下：

5、配置仓库的地址

[root@localhost ~]# cd /opt/gitlab/embedded/service/gitlab-rails/config
[root@localhost config]# vim gitlab.yml #编辑，修改host为自己域名或IP
  ## GitLab settings
  gitlab:
    ## Web server settings (note: host is the FQDN, do not include http://)
    host: 192.168.71.109
    port: 80
    https: false
[root@localhost config]# gitlab-ctl restart #重启

6、创建一个项目

点击Create a project后

7、添加秘钥

$ ssh-keygen

$ cat .ssh/id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDDP12ov0WzL9iE+ZjLE1ZrHe+YyUYg7ngPs9laamn1wge/4aLhD5whiSed2lx9TTbHgUegiuJGSbhCxaWMZzDi9ffHxvrEeK9AAR5zwVMjS35CxfKGkcZMjdev8d27HD3sz91j1t0wr8NToEvgDwaVVxNwP1sg1lCVSkUDZXzGZMaporW7vkhYdT8ZJeKv5oqiKokXkMYc8h85n64nk9nEyycaQ08aAc2M/GcLSzqt2xLkCbgoXMhzzEq0VDn8d+8Y66nEPDWPuqqK6qYS20mUCbrap/Y1vIJMlSsS/z1S+G/kZQh2Lkbri/H4HAoYkT5koaKOd2eE8YQU2k2YPc7t xxxxxx@qq.com

8、配置免密验证

9、测试提交

$ git clone git@192.168.71.109:root/test-project-1.git
$ cd test-project-1/
$ touch README.md
$ echo "test-project-1" > README.md
$ git add README.md
$ git commit -m "add README.md"
$ git push -u origin master

以上就是整个GitLab的安装、配置和使用的方式。如果想使用中文的界面，可以参考https://gitlab.com/xhang/gitlab