Managing Pod configuration using ConfigMaps and Secrets in Kubernetes (resource for the story on Medium)

database-deployment.yaml

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: postgres
spec:
  template:
    metadata:
      labels:
        app: postgres
    spec:
      containers:
      - name: postgres
        image: postgres:9.6.5
        ports:
        - containerPort: 5432 
        env:
        - name: POSTGRES_DB
          valueFrom:
            secretKeyRef:
              name: database-secret-config
              key: dbname
        - name: POSTGRES_USER
          valueFrom:
            secretKeyRef:
              name: database-secret-config
              key: username
        - name: POSTGRES_PASSWORD
          valueFrom:
            secretKeyRef:
              name: database-secret-config
              key: password