问题
nginx启动或者重启提示信息如下：
nginx: [emerg] unknown "connection_upgrade" variable
nginx: configuration file /www/server/nginx/conf/nginx.conf test failed
解决方法
在nginx配置文件http标签下添加如下几行：
map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}![亲测：nginx: [emerg] unknown “connection_upgrade” variable](https://imgs.yssmx.com/Uploads/2023/06/510076-1.png)
文章来源：https://www.toymoban.com/news/detail-510076.html
Ps：主配置文件yum安装默认路径为/etc/nginx/conf/nginx.conf文章来源地址https://www.toymoban.com/news/detail-510076.html
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