413 error with Kubernetes and Nginx ingress controller

To set it globally, this configmap.md documentation might be helpful. Turns out the variable to set is proxy-body-size, not client-max-body-size.

When you deploy the helm chart, you can set --set-string controller.config.proxy-body-size="4m".

You can use the annotation nginx.ingress.kubernetes.io/proxy-body-size to set the max-body-size option right in your Ingress object instead of changing a base ConfigMap.

Here is the example of usage:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: my-app
  annotations:
    nginx.ingress.kubernetes.io/proxy-body-size: "50m"
...