nginx-deployment_cm.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: prod
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.12
        ports:
        - containerPort: 80
        env:
        - name: date
          valueFrom:
            configMapKeyRef:
              name: myconfig1
              key: date
        - name: hostname1
          valueFrom:
            configMapKeyRef:
              name: myconfig1
              key: hostname
        - name: vegdish
          valueFrom:
            configMapKeyRef:
              name: myconfig1
              key: dish