Solution Approach for Uploading Large Files Error in nginx + ingress + gunicorn Environment
In a Python Web application deployed on Kubernetes and running with Gunicorn, a series of errors occurred when uploading large files. Here, I document the solution approach. File Upload Process File upload flow: The uploaded file first reaches the host machine where Kubernetes is running. Nginx on the host machine forwards it via Proxy to the Ingress Controller in the Kubernetes cluster, which is also implemented using Nginx. Nginx in the Ingress Controller forwards it via Proxy to Gunicorn. Gunicorn starts several Workers to handle requests, so it forwards the request to a Worker. The Worker is the final Python Web App. Solving Error 413 The first encountered error was 413 Request Entity Too Large. During the upload process, the connection was interrupted (almost always at the same upload percentage), and the request returned 413. Initially, I considered the possibility of Nginx having a request body size limit. Checking the Nginx documentation, I found that the client_max_body_size parameter controls the request body size, with a default setting of 1mb. ...