Training: Create your first Kubernetes operator

Tutorial to learn the basics about creating a Kubernetes operator.

❤️ Recognition

Most of the content is copied from the work done by Abby Bangser for this talk:

• The slides of the talk.
• The online tutorial.
• The instruqt track of the online tutorial.
• The source code of the instruqt track.

I found this tutorial quite helpful so I wanted to document it here.

As the original work is licensed under the MIT license, I'll use the same license for this repository.

🐾 Tutorial

💡 This tutorial assumes that you have three terminal tabs open: • K8S Shell: A terminal to run quick responding commands. • Run Shell: A terminal to run commands that take long time. • Code editor: A terminal to edit files. You can use a GUI text editor instead.

This tutorial is divided in several chapters, each of them into a different subdirectory containing:

• The README.md file with documentation and exercises.
• The demo directory with the source code ready to complete the exercises.

Chapters:

1. Setup environment
2. Generate application scaffolding
3. Generate a new operator and custom resource
4. Install the new crd on kubernetes
5. Understand the new operator by adding logs
6. Use data defined in the crd within the operator
7. Deploy your website from the operator
8. View your website by including a service
9. Gracefully detect an update request
10. Update the deployment when imagetag changes
11. Delete a website deployment
12. Bonus: Deploy operator to kubernetes

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