如下所示，代理端口号后面一定要加斜杠 /。否则会报类似如下错误：

Reason: DNS lookup failure for: XX:8083user/login

配置文件如下

<VirtualHost *:80>
    ProxyPass / http://127.0.0.1:8023/
    ProxyPassReverse / http://127.0.0.1:8023/
    ServerName 123456.git.yoursite.com
    ServerAlias git.yoursite.com github.yoursite.com gitlab.yoursite.com
    #errorDocument 404 /404.html
    ErrorLog "/path/file-error_log"
    CustomLog "/path/file-access_log" combined
</VirtualHost>