Ha! I was sure I shared this article with y'all before, but when I tried to find it on the channel today, I was unable to. In any case, even it was here, it won't hurt to repeat it.

So, here it is - Kubernetes: EKS, Calico and custom Admission Webhooks.

This article sheds some light on the EKS networking. The gist is that if you use anything except the native VPC CNI, your control plane pods (API, scheduler, etc.) and workload pods will end up in different networks, because you cannot install any custom pods into the control plane.

Unless you use admission webhooks, you probably won't even notice; but if you do, API won't be able to contact your admission controller pods without some workarounds.

This is the nature of managed services: you gain something - you loose something.

#kubernetes #eks #aws