5: Containerizing an app
In this chapter, you’ll build an application into a container image. The process is called containerization and the resulting app is called a containerized app.
You’ll use Docker to containerize the app, and the steps are not specific to Kubernetes. In fact, you won’t use Kubernetes in this chapter. However, it’s a vital part of a typical Kubernetes workflow, and you’ll deploy the containerized app to Kubernetes in the following chapters.
Docker and Kubernetes: Let’s clear up the confusion about Kubernetes supposedly dropping support for Docker. Kubernetes stopped using Docker as a container runtime in version 1.24. This means Kubernetes 1.24 and later do not use Docker to start and stop containers. However, apps containerized ...
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