一，把所有包升级到最新版本
yum -y upgrade二，安装最新版ruby 2.1.5
步骤http://my.oschina.net/duolus/blog/348353
三，安装官方给出的omnibus软件包（下面是官方给出的安装步骤，安装之）
curl -O https://downloads-packages.s3.amazonaws.com/centos-6.6/gitlab-7.5.1_omnibus.5.2.0.ci-1.el6.x86_64.rpm
sudo yum install openssh-server
sudo yum install postfix
sudo yum install cronie
sudo service postfix start
sudo chkconfig postfix on
sudo rpm -i gitlab-7.5.1_omnibus.5.2.0.ci-1.el6.x86_64.rpm四，重置配置和启动 GitLab
sudo gitlab-ctl reconfigure
sudo lokkit -s http -s ssh五，浏览器输入服务器ip登录
Username: root
Password: 5iveL!fe
===========================
可能遇到的问题 （不定期更新）
gitlab-ctl reconfigure 报错解决方法
[root@websvr01 ~]# sudo gitlab-ctl reconfigure
Starting Chef Client, version 11.12.2
Compiling Cookbooks...
Recipe: gitlab::default
* directory[/etc/gitlab] action create (up to date)
================================================================================
Recipe Compile Error in /opt/gitlab/embedded/cookbooks/gitlab/recipes/default.rb
================================================================================
RuntimeError
------------
External URL must include a FQDN
Cookbook Trace:
---------------
/opt/gitlab/embedded/cookbooks/gitlab/libraries/gitlab.rb:109:in `parse_external_url'
/opt/gitlab/embedded/cookbooks/gitlab/libraries/gitlab.rb:260:in `generate_config'
/opt/gitlab/embedded/cookbooks/gitlab/recipes/default.rb:34:in `from_file'
Relevant File Content:
----------------------
/opt/gitlab/embedded/cookbooks/gitlab/libraries/gitlab.rb:
102:
103: def parse_external_url
104: return unless external_url
105:
106: uri = URI(external_url.to_s)
107:
108: unless uri.host
109>> raise "External URL must include a FQDN"
110: end
111: Gitlab['user']['git_user_email'] ||= "gitlab@#{uri.host}"
112: Gitlab['gitlab_rails']['gitlab_host'] = uri.host
113: Gitlab['gitlab_rails']['gitlab_email_from'] ||= "gitlab@#{uri.host}"
114:
115: case uri.scheme
116: when "http"
117: Gitlab['gitlab_rails']['gitlab_https'] = false
118: when "https"
Running handlers:
[2014-11-25T11:10:44+08:00] ERROR: Running exception handlers
Running handlers complete
[2014-11-25T11:10:44+08:00] ERROR: Exception handlers complete
[2014-11-25T11:10:44+08:00] FATAL: Stacktrace dumped to /opt/gitlab/embedded/cookbooks/cache/chef-stacktrace.out
Chef Client failed. 0 resources updated in 7.716937465 seconds
[2014-11-25T11:10:44+08:00] ERROR: External URL must include a FQDN
[2014-11-25T11:10:45+08:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)解决方法：
是因为/etc/gitlab/gitlab.rb文件中的内容是：
external_url 'hostname'
将其修改为：
external_url='hostname'
即可，只需要在原来的配置项中添加个 ‘=’ 即可，为了避免域名引起的问题，也可以直接配置ip，如下所示：
external_url='192.168.1.49'。