执行命令：
getsebool -a|grep httpd
发现
httpd_can_network_connect off
解决：
setsebool httpd_can_network_connect 1 && setsebool httpd_can_network_connect_cobbler 1 && setsebool httpd_can_network_connect_db 1 && setsebool httpd_can_network_relay 1
需要重新启动httpd
systemctl restart httpd.service