Kubernetes nginx ingress: set client_max_body_size for one subdomain only

Question

How do I set the client_max_body_size parameter for a single subdomain? I have a server that will accept file uploads up to 5TB. All the examples I've looked at show you how to set it globally. I have multiple rules in my ingress.yaml, I don't want every single rule to inherit the client_max_body_size parameter, only the file upload server should.

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-nginx
  annotations:
    kubernetes.io/ingress.class: nginx
spec:
  rules:
  - host: example.com
    http:
      paths:
      - backend:
          serviceName: homepage
          servicePort: 80
  - host: storage.example.com
    http:
      paths:
      - backend:
          serviceName: storage
          servicePort: 80

In the above ingress.yaml, I want to set client_max_body_size for the storage service only, which is located at the host storage.example.com .

Answer 1

Because I don't see client-max-body-size on the list of annotations , that leads me to believe you'll have to use the custom-config-snippet to include the client_max_body_size 5tb; for that Ingress:

metadata:
  annotations:
    nginx.ingress.kubernetes.io/configuration-snippet: |
      client_max_body_size 5tb;

However, given that you said that you only want it for storage.example.com , you'll need to split the Ingress config for storage.example.com out into its own Ingress resource, since (AFAIK) the annotations are applied to every host: record in the Ingress resource.