centos 下安装gitlab

    gitlab官网有提供一键安装包，进入 ，然后点击“Chose an OS", 根据自己的服务器版本选择，我选择了CentOS 6。选择之后会给出一系列命令，按顺序执行即可。

    首先安装依赖包：

sudo yum install openssh-server
sudo yum install postfix
sudo yum install cronie
sudo service postfix start
sudo chkconfig postfix on

   然后下载安装包并安装

curl -O 
sudo rpm -i gitlab-7.7.2_omnibus.5.4.2.ci-1.el6.x86_64.rpm

执行的时候可能会报连接错误的问题，可以直接通过浏览器将将安装包下载下来，然后通过ftp等方式将安装包上传到服务器上即可。

    最后执行配置命令：
 

sudo gitlab-ctl reconfigure
sudo lokkit -s http -s ssh

    如果没有问题gitlab就安装好了，但一般是会有问题的，进入里面会列举一些常见的问题及解决方式。

  如，安装完后运行sudo gitlab-ctl status命令来查看一些关键进行的运行情况，正常的话应该如下所示：
run: nginx: (pid 972) 7s; run: log: (pid 971) 7s
run: postgresql: (pid 962) 7s; run: log: (pid 959) 7s
run: redis: (pid 964) 7s; run: log: (pid 963) 7s
run: sidekiq: (pid 967) 7s; run: log: (pid 966) 7s
run: unicorn: (pid 961) 7s; run: log: (pid 960) 7s

    有问题的会显示down:这是就可以通过sudo gitlab-ctl tail postgresql命令来查看出问题进程的情况。如我这边显示的错误：

==> /var/log/gitlab/unicorn/unicorn_stderr.log <==
E, [2015-02-02T11:01:15.980762 #3938] ERROR -- : adding listener failed addr=127.0.0.1:8080 (in use)
E, [2015-02-02T11:01:15.981000 #3938] ERROR -- : retrying in 0.5 seconds (4 tries left)
E, [2015-02-02T11:01:16.481516 #3938] ERROR -- : adding listener failed addr=127.0.0.1:8080 (in use)
E, [2015-02-02T11:01:16.481712 #3938] ERROR -- : retrying in 0.5 seconds (3 tries left)
E, [2015-02-02T11:01:16.982144 #3938] ERROR -- : adding listener failed addr=127.0.0.1:8080 (in use)
E, [2015-02-02T11:01:16.982390 #3938] ERROR -- : retrying in 0.5 seconds (2 tries left)
E, [2015-02-02T11:01:17.482823 #3938] ERROR -- : adding listener failed addr=127.0.0.1:8080 (in use)
E, [2015-02-02T11:01:17.483013 #3938] ERROR -- : retrying in 0.5 seconds (1 tries left)
E, [2015-02-02T11:01:17.983562 #3938] ERROR -- : adding listener failed addr=127.0.0.1:8080 (in use)
E, [2015-02-02T11:01:17.983757 #3938] ERROR -- : retrying in 0.5 seconds (0 tries left)
E, [2015-02-02T11:01:18.484215 #3938] ERROR -- : adding listener failed addr=127.0.0.1:8080 (in use)
/opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/lib/unicorn/socket_helper.rb:147:in `initialize': Address already in use - bind(2) for "127.0.0.1" port 8080 (Errno::EADDRINUSE)
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/lib/unicorn/socket_helper.rb:147:in `new'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/lib/unicorn/socket_helper.rb:147:in `bind_listen'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/lib/unicorn/http_server.rb:229:in `listen'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/lib/unicorn/http_server.rb:773:in `block in bind_new_listeners!'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/lib/unicorn/http_server.rb:773:in `each'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/lib/unicorn/http_server.rb:773:in `bind_new_listeners!'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/lib/unicorn/http_server.rb:141:in `start'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/gems/unicorn-4.6.3/bin/unicorn:126:in `'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/bin/unicorn:23:in `load'
from /opt/gitlab/embedded/service/gem/ruby/2.1.0/bin/unicorn:23:in `'

    显示是8080端口被占用了，通过netstat -ntlp命令查看使用8080端口的进程情况，杀死该进程后问题解决了。