Kustomisation Yaml File

  • Example:

  • k8s directory that contains nginx-depl.yml and nginx-service.yml.

    • kustomize does not look for either of the above files. In fact, it looks for a kustomization.yaml file.

  • The kustomization.yaml file will contain all of the resources needed by kustomize:

# kubernetes resources to be managed by kustomize
resources:
  - nginx-deployment.yaml
  - nginx-service .yaml
  
# Customizations that need to be made
commonLabels:
  company: KodeKloud

  • The Cusotmizations that need to be made section contains all of the changes that we want to apply.

  • Once all customisations are done, we run kustomize build <root directory>. In the above example, <root directory> would be k8s.

    • It will input all resources and apply transformations that we have defined.

  • If you check the terminal output, in the above case you’ll see the nginx service and the nginx deployment output.

  • Then you’ll see the additions that were made. commonLabels:

kustomize build k8s/
apiVersion: v1
kind: Service
metadata:
  labels:
    company: KodeKloud

  • The kustomize build command however does not apply/deploy the Kubernetes resources to the cluster.

  • It just outputs what the final configuration file looks like in the terminal.

  • If we want to apply what kustomize build outputs to the cluster, it needs to be directed to the kubectl apply command.

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