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You can get stuff like this You can get stuff like this with Network Policies...

Kubernetes Network Policy Recipes

This repository contains various use cases of Kubernetes Network Policies and sample YAML files to leverage in your setup. If you ever wondered how to drop/restrict traffic to applications running on Kubernetes, read on.

Easiest way to try out Network Policies is to create a new Google Kubernetes Engine cluster. Applying Network Policies on your existing cluster can disrupt the networking. At the time of writing, most cloud providers do not provide built-in network policy support.

If you are not familiar with Network Policies at all, I recommend reading my Securing Kubernetes Cluster Networking article first.

NetworkPolicy Crash Course

NetworkPolicies operate at layer 3 or 4 of OSI model (IP and port level). They are used to control the traffic in(ingress) and out(egress) of pods.

Here are some NetworkPolicies gotcha's

spec:
  podSelector:
    matchLabels:
      ...
  ingress: []

Before you begin

I really recommend watching my KubeCon talk on Network Policies if you want to get a good understanding of this feature. It will help you understand this repo better.

Basics

Namespaces

Serving External Traffic

Advanced

Controlling Outbound (Egress) Traffic 🔥🆕🔥


Author

Created by Ahmet Alp Balkan (@ahmetb).

Copyright 2017, Google Inc. Distributed under Apache License Version 2.0 ,see LICENSE for details.

Disclaimer: This is not an official Google product.

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