13-pod-configmap.yaml

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
    - name: nginx
      image: nginx:alpine
      env:
        # Define the environment variable
        - name: PLAYER_INITIAL_LIVES # Nombre de la variable
          valueFrom:
            configMapKeyRef:
              name: game-demo           # El confimap desde donde vienen los valores
              key: player_initial_lives # La key que vamos a usar
        - name: UI_PROPERTIES_FILE_NAME
          valueFrom:
            configMapKeyRef:
              name: game-demo
              key: ui_properties_file_name
      volumeMounts:
      - name: config
        mountPath: "/config"
        readOnly: true
  volumes:
    - name: config
      configMap:
        name: game-demo # el nombre del configmap que queremos montar
        items: # Un arreglo de keys del configmap para crear como archivos
        - key: "game.properties"
          path: "game.properties"
        - key: "user-interface.properties"
          path: "user-interface.properties"