Kustomize is a tool for customizing Kubernetes configurations, simplifying the rollout and deployment of applications into clusters. It has the following features to manage application configuration files:

• generating resources from other sources
• setting cross-cutting fields for resources
• composing and customizing collections of resources

In this Lab scenario, you'll learn how to use Kustomize Bases and Overlays to deploy 3 different versions (Baseline, Staging, and Production) of the same sample web application into a provided Kubernetes cluster. 

 

Lab Objectives

Upon completion of this Lab, you will be able to:

• Use Kustomize to deploy a basic web application which has been packaged already into a docker image (hosted on DockerHub). 
• Understand how to use configure and work with Kustomize Bases and Overlays
• Use Kustomize to generate 3 different enviroment specific deployments:
  • Baseline - the baseline deployment version of the webapp
  • Staging - uses a Kustomize overlay to change the baseline deployment settings
  • Production - uses a Kustomize overlay to change the baseline deployment settings
• Test and validate the Base, Staging, and Production deployed cluster resources using the curl command and your workstations browser

You should:

• Be comfortable with basic Linux command line administration
• Be comfortable with basic Kubernetes and Container based concepts

Lab Environment

This Lab will start with the following AWS resources provisioned automatically for you:

• 2 x EC2 instances - each assigned a public IP address:
  • ide.cloudacademy.platform.instance - provides a web-based IDE with integrated terminal
  • k8s.cloudacademy.platform.instance - provides a fully functional and running Kubernetes cluster

To achieve the Lab end state, you will be walked through the process of:

• Using your local workstation browser to remotely connect to the ide.cloudacademy.platform.instance
• Using the web-based IDE and integrated terminal, you'll complete the remainder of the stated Lab Objectives (above)