Question

How do I create an IP whitelist in DigitalOcean Kubernetes clusters?

  • request.headers[“x-real-ip”] doesn’t apppear to have the real external ip address
  • DO firewall is attached to the K8s cluster but is already whitelisted to internal ips only as the load balancer only has access to the cluster
  • can’t attach a DO firewall to the load balancer

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Hi there,

One way I can think that you can achieve this is to use an ingress controller like nginx.

Expose the nginx ingress controller as a ‘LoadBalancer’. Then use service annotations to configure the nginx whitelist per the docs here.

https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/annotations/#whitelist-source-range

This will allow you to manage traffic more fine grained via your ingress controller and ingress rules.

Hope this helps!

Regards,

John Kwiatkoski Senior Developer Support Engineer