Use Terraform to set up the necessary infrastructure (Lab setup)
Installing the hello server
Deploy a second copy of the hello-clients app into the new namespace
How to Use a Network Policy on Google Kubernetes Engine
This lab will show you how to improve the security of your Kubernetes Engine by applying fine-grained restrictions to network communication.
The Principle of Least Privilege is widely recognized as an important design consideration in enhancing the protection of critical systems from faults and malicious behavior. It suggests that every component must be able to access only the information and resources that are necessary for its legitimate purpose. This document demonstrates how the Principle of Least Privilege can be implemented within the Kubernetes Engine network layer.
Network connections can be restricted at two tiers of your Kubernetes Engine infrastructure. The first, and coarser grained, mechanism is the application of Firewall Rules at the Network, Subnetwork, and Host levels. These rules are applied outside of the Kubernetes Engine at the VPC level.
While Firewall Rules are a powerful security measure, and Kubernetes enables you to define even finer grained rules via Network Policies. Network Policies are used to limit intra-cluster communication. Network policies do not apply to pods attached to the host's network namespace.
For this lab you will provision a private Kubernetes Engine cluster and a bastion host with which to access it. A bastion host provides a single host that has access to the cluster, which, when combined with a private Kubernetes network, ensures that the cluster isn't exposed to malicious behavior from the internet at large. Bastions are particularly useful when you do not have VPN access to the cloud network.
Within the cluster, a simple HTTP server and two client pods will be provisioned. You will learn how to use a Network Policy and labeling to only allow connections from one of the client pods.
This lab was created by GKE Helmsman engineers to give you a better understanding of GKE Binary Authorization. You can view this demo by running
gsutil cp -r gs://spls/gke-binary-auth/* . and
cd gke-binary-auth-demo command in cloud shell. We encourage any and all to contribute to our assets!
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