A Practical Guide to Kubernetes/

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Defining ConfigMaps as YAML

Defining ConfigMaps as YAML

Explore defining ConfigMaps as YAML files.

We'll cover the following...

All ConfigMaps we created so far were done through kubectl create cm commands. Everything in Kubernetes can be defined as YAML, and that includes ConfigMaps as well.

Looking into the YAML

Even though we have not yet specified ConfigMaps as YAML, we have seen the format quite a few times throughout this chapter. Since we cannot be sure whether we can create a ConfigMap YAML file from memory, let’s make things easy for ourselves and use kubectl to output our existing my-config ConfigMap in YAML format.

kubectl get cm my-config -o yaml

The output is as follows:

apiVersion: v1
data:
  something: else
  weather: sunny
kind: ConfigMap
metadata:
  name: my-config
  ...

Just as with any other Kubernetes object, ...