This guide demonstrates how to improve the security of your Kubernetes Engine by applying fine-grained restrictions to network communication. You will provision a simple HTTP server and two client pods in a Kubernetes Engine cluster, then use a Network Policy restrict connections from client pods.
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update apiVersion of Deployment from extensions/v1beta1 to apps/v1 #36
Currently, GKE is using v1.14 or v1.15, and so these manifests can be applied.
However, a few months later, GKE will use v1.16, and then the manifests cannot be applied.
Deployment in extensions/v1beta1 is deprecated in Kubernetes v1.16. https://kubernetes.io/blog/2019/07/18/api-deprecations-in-1-16/
Currently, GKE is using v1.14 or v1.15, and so these manifests can be applied. However, a few months later, GKE will use v1.16, and then the manifests cannot be applied.