connect() failed (113: No route to host)

nginx connect() failed (113: No route to host) while connecting to upstream

 

Centos7中默认将原来的防火墙iptables升级为了firewalld
请尝试关闭防火墙

systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall开机启动

折腾一天。。