apiVersion: apps/v1
kind: Deployment
metadata:
  name: sleep
spec:
  selector:
    matchLabels:
      app: sleep
  template:
    metadata:
      labels:
        app: sleep
    spec:
      containers:
        - name: sleep
          image: kiamol/ch03-sleep
          envFrom:
          - configMapRef:
              name: sleep-config-env-file
          env:
          - name: KIAMOL_CHAPTER
            value: "04"
          - name: KIAMOL_SECTION
            valueFrom:
              configMapKeyRef:              
                name: sleep-config-literal
                key: kiamol.section