kubernetes-deployment-with-variable.yaml

apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: app-name-example
  namespace: default
spec:
  replicas: 2
  selector:
    matchLabels:
      app: app-name-example
    spec:
      containers:
        - env:
            - name: DB_HOST
              valueFrom:
                configMapKeyRef:
                  key: db_host
                  name: globalenv
            - name: DB_USER
              valueFrom:
                configMapKeyRef:
                  key: db_user
                  name: globalenv
            - name: DB_PASSWD
              valueFrom:
                secretKeyRef:
                  key: db_passwd
                  name: globalsec
            - name: ENVIRONMENT
              valueFrom:
                configMapKeyRef:
                  key: environment
                  name: globalenv
          image: >-
            examplerepo/app-name-example:latest
          name: app-name-example
          ports:
            - containerPort: 8080
              protocol: TCP