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首先申明一点，Ubuntu做为服务器，个人是不推荐的。但是Ubuntu源的东西还是挺全的，要装什么东西都比较方便。

1，安装gitlab要用的一些组件

# apt-get install Nginx curl openssh-server ca-certificates postfix

2，安装gitlab

# curl -sS https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh | sudo bash
# apt-get install gitlab-ce

3，配置，启动gitlab

# cat /etc/gitlab/gitlab.rb | awk '{gsub(/^ +#/,"#",$0);if($0 !~ /^$/ && $0 !~ /^#/) {print $0}}'
external_url 'http://gitlab.XXXXX.com'  //域名
git_data_dirs({
 "default" => {
 "path" => "/home/gitlab"   //定义仓库路径
 }
})
web_server['external_users'] = ['www-data','gitlab-www','git']    //允许启动gitlab的用户
Nginx['enable'] = false  //不使用内置Nginx

# gitlab-ctl reconfigure  //配置生效，并启动
# gitlab-ctl status  //查看状态，或用ps,netstat查看进程
run: gitaly: (pid 21519) 66501s; run: log: (pid 14077) 70678s
run: gitlab-monitor: (pid 21531) 66501s; run: log: (pid 14277) 70666s
run: gitlab-workhorse: (pid 21543) 66500s; run: log: (pid 14015) 70692s
run: logrotate: (pid 14722) 1699s; run: log: (pid 14044) 70684s
run: node-exporter: (pid 21561) 66499s; run: log: (pid 14175) 70672s
run: postgres-exporter: (pid 21566) 66499s; run: log: (pid 14372) 70652s
run: postgresql: (pid 21576) 66499s; run: log: (pid 13758) 70745s
run: prometheus: (pid 21658) 66498s; run: log: (pid 14319) 70658s
run: redis: (pid 21669) 66498s; run: log: (pid 13695) 70751s
run: redis-exporter: (pid 21673) 66497s; run: log: (pid 14301) 70660s
run: sidekiq: (pid 24538) 56197s; run: log: (pid 13996) 70698s
run: unicorn: (pid 21704) 66494s; run: log: (pid 13953) 70704s

web_server['external_users'] = ['www-data','gitlab-www','git']，这一步很重要，如果不加用户，访问网址的时候，就会报502，

connect() to unix://var/opt/gitlab/gitlab-rails/sockets/gitlab.socket failed (13: Permission denied) while connecting to upstream

查看一下Nginx.conf就可以知道，nginx的启动用户，加到web_server就行了。

4，配置nginx

# cat /etc/nginx/sites-enabled/gitlab.conf
upstream gitlab {
# 7.x 版本在此位置
# server unix:/var/opt/gitlab/gitlab-rails/tmp/sockets/gitlab.socket;
# 8.0 位置
 server unix://var/opt/gitlab/gitlab-rails/sockets/gitlab.socket;
}

server {
 listen 80;
 server_name gitlab.XXXXX.com;
 root /opt/gitlab/embedded/service/gitlab-rails/public;

 # individual nginx logs for this gitlab vhost
 access_log /var/log/Nginx/gitlab_access.log;
 error_log /var/log/Nginx/gitlab_error.log;

 location / {
 # serve static files from defined root folder;.
 # @gitlab is a named location for the upstream fallback, see below
 try_files $uri $uri/index.html $uri.html @gitlab;
 }

 # if a file, which is not found in the root folder is requested,
 # then the proxy pass the request to the upsteam (gitlab unicorn)
 location @gitlab {
 proxy_read_timeout 300; # https://github.com/gitlabhq/gitlabhq/issues/694
 proxy_connect_timeout 300; # https://github.com/gitlabhq/gitlabhq/issues/694
 proxy_redirect off;

 proxy_set_header X-Forwarded-Proto $scheme;
 proxy_set_header Host $http_host;
 proxy_set_header X-Real-IP $remote_addr;

 proxy_pass http://gitlab;
 }
}

# /etc/init.d/Nginx start

然后就可以访问http://gitlab.XXXXX.com，就ok了