How to Uniformly Increase File Upload Size in Kubernetes
The article walks through diagnosing why a second Kubernetes cluster ignored the upload‑size setting, shows how to inspect the nginx‑ingress‑controller deployment, identify the --configmap argument, and fix the issue by updating the referenced ConfigMap name to nginx‑configuration.
Reference documentation (https://blog.csdn.net/yucaifu1989/article/details/107638061) describes a working configuration for one cluster, but the same setup failed on another cluster.
To troubleshoot, the author first displayed the nginx-ingress-controller deployment in the ingress-nginx namespace:
kubectl get deploy nginx-ingress-controller -n ingress-nginx -o yamlThe deployment spec revealed the container arguments, notably the parameter:
--configmap=$(POD_NAMESPACE)/nginx-configurationThis --configmap flag tells the controller which ConfigMap supplies the NGINX configuration. The author realized that the ConfigMap name referenced here must match an existing ConfigMap.
By editing the ConfigMap resource and ensuring its metadata.name is set to nginx-configuration, the upload‑size setting became effective and the problem was resolved.
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