nginx.conf 的http段内增加如下代码：

    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

在对应的server段内增加如下代码：

     location  /dctrl/ws {
        proxy_pass http://10.217.20.102:8093;

        proxy_redirect    off;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header Origin "";
    }

location 配置根据websocket地址配置，比如地址为：ws://10.217.20.102/dctrl/ws
,配置就按照上面示例