gitlab安装

1.linux必要配置
	在防火墙里开放http跟ssh端口
		yum install lokkit
		yum install curl openssh-server openssh-clients postfix cronie -y
		service postfix start
		chkconfig postfix on
		lokkit -s http -s ssh
	添加gitlab仓库，并安装
		curl -sS http://packages.gitlab.cc/install/gitlab-ce/script.rpm.sh | sudo bash
		sudo yum install gitlab-ce
	启动gitlab
		gitlab-ctl reconfigure
		vim /etc/gitlab/gitlab.rb 
		修改external_url为gitlab机子的ip+要使用的端口 如：http://192.168.56.101:8888
		修改nginx['listen_port'] = 8888
		重新配置gitlab并重启		
		gitlab-ctl reconfigure
		gitlab-ctl restart
	配置防火墙
	    vim /etc/sysconfig/iptables
	    -A INPUT -m state --state NEW -m tcp -p tcp --dport 8888 -j ACCEPT
	    service iptables restart