centos：http://www.centos.org/download/
download：https://about.gitlab.com/downloads/
update：https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/doc/update.md
trouble：https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/README.md
之前使用gitlab (http://www.cnblogs.com/Irving/p/3733339.html) 原生的包安装，升级过于麻烦，换成Omnibus就方便很多。
#安装CentOS
vmware简易安装linux系统，默认只能自己创建一个非root用户（因为root用户默认存在），所以你安装好后，是没法使用root用户登陆的。
进入超级用户模式给root用户设置密码
[irving@localhost ~]$ su
Password:
桥接
1. ONBOOT=yes
2. 配置static
WADDR=:0C:::EF:
TYPE
=Ethernet BOOTPROTO=static DEFROUTE=yes PEERDNS=yes PEERROUTES=yes IPV4_FAILURE_FATAL=no IPV6INIT=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_PEERDNS=yes IPV6_PEERROUTES=yes IPV6_FAILURE_FATAL=no NAME=eno16777736 UUID=74fd9464-5ad3-4c73-861a-79f66df41231 ONBOOT=yes IPADDR0=10.200.66.10
PRRFIXO0
=
GATEWAY0
=10.200.0.2
DNS1
=114.114.114.114
[root@localhost network
-scripts]#
#更新包
yum update
yum -y install wget
#下载安装
curl -O https://downloads-packages.s3.amazonaws.com/centos-7.0.1406/gitlab-7.6.2_omnibus.5.3.0.ci.1-1.el7.x86_64.rpm
sudo yum install openssh-server
sudo systemctl enable sshd
sudo systemctl start sshd
sudo yum install postfix
sudo systemctl enable postfix
sudo systemctl start postfix
sudo rpm -i gitlab-7.6.2_omnibus.5.3.0.ci.1-1.el7.x86_64.rpm
#配置
sudo gitlab-ctl reconfigure
sudo firewall-cmd --permanent --add-service=http # open up the firewall for HTTP and SSH requests
sudo systemctl reload firewalld
#查看运行情况
sudo gitlab-ctl status;
#配置external_url
Try specifying an external_url in /etc/gitlab/gitlab.rb. Also check your firewall settings; port 80 (HTTP) or 443 (HTTPS) might be closed on your GitLab server.
#配置域名或IP生效
sudo gitlab-ctl reconfigure
备注：升级到 7.7 正式版 按照官方文档来就好，update：https://gitlab.com/gitlab-org/omnibus-gitlab/blob/master/doc/update.md
https://about.gitlab.com/update/#centos-6
/opt/gitlab/embedded/bin/psql --version
sudo gitlab-ctl pg-upgrade
sudo yum install gitlab-ce
sudo gitlab-ctl reconfigure
sudo gitlab-ctl restart
https://docs.gitlab.com/omnibus/update/README.html
sudo yum install -y gitlab-ce
更换源：https://mirrors.tuna.tsinghua.edu.cn/help/gitlab-ce/