Introduction to Kustomize

Kustomize uses overlays for Kubernetes manifests to add, remove, or update configuration options without forking. What Kustomize does is take a Kubernetes template, patch it with specified changes in kustomization.yaml, and then deploy it to Kubernetes.

It is a handy tool for patching non-complex applications, for example, with changes needed for different environments or resource namespacing.

Kustomize is available as a standalone binary and as a native command in kubectl since v.1.14.

Let's look at a couple of Kustomize commands, use the following command:

• To show the generated modified templates on the terminal, use the following command:

  $ kubectl kustomize base 

• To deploy generated modified templates on Kubernetes:

  $ kubectl apply –k base

In the preceding examples, base is the folder that has the application files and kustomization.yaml.

Note

The preceding commands will fail as there is no base folder. This...