What are some examples of Kubernetes ConfigMaps?

What are some examples of Kubernetes ConfigMaps?

Kubernetes ConfigMaps are used to store non-confidential data in key-value pairs. Here are a few examples:

1. Storing configuration files for applications.
2. Defining environment variables for pods.
3. Providing command-line arguments for containers.

Can you show me a YAML example of a ConfigMap?

Sure! Here's a simple YAML example of a ConfigMap:

apiVersion: v1
kind: ConfigMap
metadata:
  name: example-config
data:
  app.properties: |
    key1=value1
    key2=value2

How do I use this ConfigMap in a pod?

You can use the ConfigMap in a pod by referencing it in your pod's specification. Here's an example:

apiVersion: v1
kind: Pod
metadata:
  name: example-pod
spec:
  containers:
  - name: example-container
    image: example-image
    env:
    - name: APP_CONFIG
      valueFrom:
        configMapKeyRef:
          name: example-config
          key: app.properties