TiDB Grafana反向代理

将Grafana 默认3000端口改为80端口访问，使用Nginx反向代理，nginx.conf中新增如下配置

    server {
      listen 80;
      location / {
        proxy_pass http://X.X.X.X:3000;
      }
    }

将原80端口改为其他端口； nginx -s reload即可；

失败报错： If you're seeing this Grafana has failed to load its application files：

 原因：权限不足

排查Nginx日志： /usr/local/nginx/logs/error.log 

2022/02/28 11:39:10 [crit] 3018#0: *404 open() "/usr/local/nginx/proxy_temp/8/11/0000000118" failed (13: Permission denied) while reading upstream

nginx代理临时目录权限不足，为目录授权后恢复： chmod 777 -r /usr/local/nginx