PBM-1114 simulate failure on uploading metadata files

pbm-functional/pytest/Dockerfile-nginx

@@ -1,2 +1,3 @@
 FROM nginx:stable-alpine
 COPY conf/nginx.conf /etc/nginx/nginx.conf
+EXPOSE 21114

pbm-functional/pytest/conf/nginx.conf

@@ -23,7 +23,6 @@ http {
     sendfile        on;
     keepalive_timeout  65;
     limit_req_zone $limit zone=one:10m rate=10r/m;
-    limit_conn_zone $binary_remote_addr zone=addr:10m;
 
     map $request_method $limit {
         default         "";
@@ -32,8 +31,7 @@ http {
     }
 
     server {
-        listen       80;
-        listen  [::]:80;
+        listen       21114;
         server_name  minio-nginx;
 
         ignore_invalid_headers off;
@@ -52,13 +50,23 @@ http {
             proxy_set_header Connection "";
             chunked_transfer_encoding off;
 
-            limit_req zone=one;
-            limit_req_status 429;
-
-            limit_conn addr 10;
-            limit_conn_status 444;
-
             proxy_pass http://minio:9000/; 
         }
+        location ~* metadata\.json {
+            if ($request_method = PUT) {
+                return 444;
+            }
+            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 $scheme;
+
+            proxy_connect_timeout 300;
+            proxy_http_version 1.1;
+            proxy_set_header Connection "";
+            chunked_transfer_encoding off;
+
+            proxy_pass http://minio:9000$request_uri;
+        }
     }
 }