Create a Cluster

Creating a cluster#

Before we create a cluster (or start using one you already have available), we’ll clone the vfarcic/k8s-specs repository which contains most of the definitions we’ll use in this course.

A note to Windows users#

Please execute all the commands from this course from Git Bash. That way, you'll be able to run them as they are instead of modifying their syntax to adapt them to Windows terminal or PowerShell.

All the commands from this chapter are available in the 01-hpa.sh Gist.

git clone https://github.com/vfarcic/k8s-specs.git

cd k8s-specs

If you cloned the repository before, please make sure that you have the latest version by executing git pull.

Gists and specifications#

The gists and the specifications that follow are used to test the commands in this chapter. Choose the flavor you want and run the commands from its .sh file to create the cluster and the required specifications needed in this chapter.

NOTE: In the end, you will see a command to DELETE the cluster too. Don’t execute that command. Use the DELETE command only when you need to delete the cluster, preferably at the end of the chapter.

Please note that we will use Helm to install necessary applications, but we’ll switch to “pure” Kubernetes YAML for experimenting with (probably new) resources used in this chapter and for deploying the demo application. In other words, we’ll use Helm for one-time installations (e.g., Metrics Server) and YAML for things we’ll explore in more detail (e.g., HorizontalPodAutoscaler).

In the next lesson, let’s talk about Metrics Server.