nginx访问502 gateway，*1 connect() failed (111: Connection refused) while connecting to upstream

安装好nginx，php环境后，配置虚拟主机，结果访问后就报502 gateway，查看日志文件后，显示错误如下：

2019/04/29 16:24:39 [error] 19433#19433: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.1.52, server: 192.168.1.222, request: "GET / HTTP/1.1"

解决方案，先查看下php-fpm是否启动，然后查看虚拟主机配置中的 root 配置

server {
    listen       80;
    server_name  192.168.1.222;

    charset utf-8;

    location / {
        root   /data/wwwroot;
        index  index.php index.html index.htm;
    }

    location ~ \.php$ {
		#注意这里root配置与当前server下的root保持一致
		#我的报错原因是我把root这项给删除
		root           /data/wwwroot;
		fastcgi_pass   127.0.0.1:9000;
		fastcgi_index  index.php;
		fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
		include        fastcgi_params;
    }
}

然后重启下nginx就可以访问了。