Question

Kubernetes Load balancer allow access to certain domain

I have a Django application running on kubernetes with a load balancer. I keep getting a lot of Invalid http_post email. Is there a way for me to block other traffic. On a server that is running nginx i can write this in the configuration file

    if ($host != "mydomain.com") {
        return 404;
    }

Is there a way for me to do something similar in the service yaml file for my load balancer or at least not allow it to touch my Django deployment on the kubernetes if the allowed domain is not in a list specified by me

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Bobby Iliev
Site Moderator
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• March 6, 2023

Hi there,

Yes, I believe that you should be able to do that with Nginx Ingress.

You can follow the steps on how to set that up using Helm here:

https://www.digitalocean.com/community/tutorials/how-to-set-up-an-nginx-ingress-on-digitalocean-kubernetes-using-helm

Or if you prefer, you could use the Marketplace instead:

https://marketplace.digitalocean.com/apps/nginx-ingress-controller

Then you can add different host rules, eg:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-echo
  namespace: backend
spec:
  ingressClassName: nginx
  rules:
    - host: echo.starter-kit.online
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: echo
                port:
                  number: 8080

Hope that this helps!

Best,

Bobby