httpd on CentOS7 box using VirtualHost
11 月 03
VirtualHost setting
http://www.ahlinux.com/server/proxy/8732.html
CentOS got httpd 503 error using ProxyPass
http://stackoverflow.com/questions/25644487/httpd-returning-503-service-unavailable-with-mod-proxy-for-tomcat-8
If this is the problem, it can be solved by running:
/usr/sbin/setsebool -P httpd_can_network_connect 1