Revert "Try to fix nginx"

This reverts commit 03fecc8cd1.

docker/nginx/conf.d/include/location-skylink

@@ -9,7 +9,7 @@ if ($request_method = PURGE) {
     return 462;
 }
 
-limit_conn downloads_by_ip 100; # ddos protection: max 100 downloads at a time
+limit_conn downloads_by_ip 20; # ddos protection: max 100 downloads at a time
 
 # ensure that skylink that we pass around is base64 encoded (transform base32 encoded ones)
 # this is important because we want only one format in cache keys and logs

docker/nginx/conf.d/server/server.api

@@ -177,9 +177,15 @@ location /skynet/skyfile {
     limit_req zone=uploads_by_ip burst=10 nodelay;
     limit_req zone=uploads_by_ip_throttled;
 
+    limit_req zone=downloads_by_ip burst=20 nodelay;
+    limit_req zone=downloads_by_ip_throttled;
+
     limit_conn upload_conn 5;
     limit_conn upload_conn_rl 1;
 
+    limit_conn download_conn 20;
+    limit_conn download_conn_rl 1;
+
     client_max_body_size 1000M; # make sure to limit the size of upload to a sane value
 
     # increase request timeouts
@@ -215,9 +221,15 @@ location /skynet/tus {
     limit_req zone=uploads_by_ip burst=10 nodelay;
     limit_req zone=uploads_by_ip_throttled;
 
-    limit_conn upload_conn 5;
+    limit_req zone=downloads_by_ip burst=20 nodelay;
+    limit_req zone=downloads_by_ip_throttled;
+
+    limit_conn upload_conn 3;
     limit_conn upload_conn_rl 1;
 
+    limit_conn download_conn 20;
+    limit_conn download_conn_rl 1;
+
     # TUS chunks size is 40M + leaving 10M of breathing room
     client_max_body_size 50M;
 
@@ -286,9 +298,15 @@ location /skynet/pin {
     limit_req zone=uploads_by_ip burst=10 nodelay;
     limit_req zone=uploads_by_ip_throttled;
 
-    limit_conn upload_conn 5;
+    limit_req zone=downloads_by_ip burst=20 nodelay;
+    limit_req zone=downloads_by_ip_throttled;
+
+    limit_conn upload_conn 3;
     limit_conn upload_conn_rl 1;
 
+    limit_conn download_conn 20;
+    limit_conn download_conn_rl 1;
+
     proxy_set_header User-Agent: Sia-Agent;
     proxy_pass http://sia:9980$uri?siapath=$dir1/$dir2/$dir3&$args;
 }

docker/nginx/nginx.conf

@@ -99,12 +99,18 @@ http {
     limit_req_zone $binary_remote_addr zone=uploads_by_ip:10m rate=10r/s;
     limit_req_zone $limit_key zone=uploads_by_ip_throttled:10m rate=10r/m;
 
+    limit_req_zone $binary_remote_addr zone=downloads_by_ip:10m rate=20r/s;
+    limit_req_zone $limit_key zone=downloads_by_ip_throttled:10m rate=20r/m;
+
     limit_req_zone $binary_remote_addr zone=registry_access_by_ip:10m rate=60r/m;
     limit_req_zone $limit_key zone=registry_access_by_ip_throttled:10m rate=20r/m;
 
     limit_conn_zone $binary_remote_addr zone=upload_conn:10m;
     limit_conn_zone $limit_key zone=upload_conn_rl:10m;
 
+    limit_conn_zone $binary_remote_addr zone=download_conn:10m;
+    limit_conn_zone $limit_key zone=download_conn_rl:10m;
+
     limit_conn_zone $binary_remote_addr zone=downloads_by_ip:10m;
 
     limit_req_status 429;