---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: redis-auth-sa

---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: app-a-1
spec:
  template:
    # Below is the podSpec.
    metadata:
      name: app-a-1
    spec:
      serviceAccountName: redis-auth-sa
      automountServiceAccountToken: false
      ...