nginx: [warn] could not build optimal proxy_headers_hash error 错误

如果我们拥有一个代理多个站点的Nginx代理服务器，我们可以以一种方式遇到这种错误。

“nginx: [warn] could not build optimal proxy_headers_hash, you should increase either proxy_headers_hash_max_size: 512 or proxy_headers_hash_bucket_size: 64; ignoring proxy_headers_hash_bucket_size error“

为了解决错误，我们必须编辑为代理站点提供服务的文件。
我的位于/etc/nginx/sites.d/目录中。

在每个文件中，编辑"位置"部分，如下所示：

location ~ /.git {
          deny all;
     }
     proxy_redirect   off; proxy_set_header Host $host; 
     proxy_set_header X-Real-IP $remote_addr; 
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
     proxy_set_header X-Forwarded-Proto $scheme;
 ###### Set as shown below. You can use other values for the numbers as you wish
     proxy_headers_hash_max_size 512;
     proxy_headers_hash_bucket_size 128; 
     proxy_redirect   off; 
     proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; 
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
     proxy_set_header X-Forwarded-Proto $scheme;
 }

完成编辑小部分后，通过运行nginx -t命令检查nginx配置。

sudo nginx -t

你应该得到：

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful