example-minio-reverse-proxy-loadbalance-nginx

minio.conf

upstream minio_s3 {
   least_conn;
   server minio-01.internal-domain.com:9000;
   server minio-02.internal-domain.com:9000;
   server minio-03.internal-domain.com:9000;
   server minio-04.internal-domain.com:9000;
}

upstream minio_console {
   least_conn;
   server minio-01.internal-domain.com:9090;
   server minio-02.internal-domain.com:9090;
   server minio-03.internal-domain.com:9090;
   server minio-04.internal-domain.com:9090;
}

server {
   listen       80;
   listen  [::]:80;
   server_name  yourdomain;

   # Allow special characters in headers
   ignore_invalid_headers off;
   
   # Allow any size file to be uploaded.
   # Set to a value such as 1000m; to restrict file size to a specific value
   client_max_body_size 0;
   
   # Disable buffering
   proxy_buffering off;
   proxy_request_buffering off;

   location /minio/ui/ {
      rewrite ^/minio/ui/(.*) /$1 break;
      proxy_set_header Host $http_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;
      proxy_set_header X-NginX-Proxy true;

      real_ip_header X-Real-IP;
      proxy_connect_timeout 300;
      # Default is HTTP/1, keepalive is only enabled in HTTP/1.1
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";
      chunked_transfer_encoding off;
      proxy_pass https://minio_console; # This uses the upstream directive definition to load balance
   }

   location /drive/ {
      rewrite ^/drive/(.*) /$1 break;
      proxy_set_header Host $http_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;

      proxy_connect_timeout 300;
      
      # Default is HTTP/1, keepalive is only enabled in HTTP/1.1
      proxy_http_version 1.1;
      proxy_set_header Connection "";
      chunked_transfer_encoding off;
      proxy_pass https//minio_s3; # This uses the upstream directive definition to load balance
   }
}

#source : https://min.io/docs/minio/linux/integrations/setup-nginx-proxy-with-minio.html