Rails + Nginx + activestorage + directupload with large files - ruby-on-rails

Question

I'm not able to upload files larger than 4.7gb, larger than that fails with a 404 not found.
It works just fine in development without nginx, so I assume nginx is the source of the problem here.
Nginx config:
server {
upstream bench {
server 127.0.0.1:3001;
}
server_name servername;
proxy_http_version 1.1;
root /path/to/server;
proxy_max_temp_file_size 10024m;
client_body_in_file_only on;
client_body_buffer_size 1M;
client_max_body_size 100G;
}
location / {
try_files $uri #bench;
}
location /cable {
proxy_http_version 1.1;
proxy_pass http://bench/cable;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "Upgrade";
}
location #bench {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $http_host;
proxy_http_version 1.1;
proxy_set_header Connection "";
proxy_pass http://bench;
proxy_headers_hash_max_size 512;
proxy_headers_hash_bucket_size 128;
proxy_buffering off;
proxy_request_buffering off;
}
error_page 500 502 503 504 /500.html;
keepalive_timeout 10;
routes.rb
Rails.application.routes.draw do
resources :benches, :path => "benchmarks"
root 'benches#index'
end

Answer 1

The problem wasn't nginx. The service_url activestorage creates when you start the upload is only valid for 5 minutes by default, so if your files takes more than 5minutes to upload.. you're out of luck.
config.active_storage.service_urls_expire_in = 1.hour