anchor.diff:  . `kubectl create configmap redis-config --from-file=<properties file>` where `<properties file>` is a property file with key/value pairs. For example, `templates/redis-config` looks like:
   +
   ```
  -maxmemory=2mb
  -maxmemory-policy=allkeys-lru
  +maxmemory 2mb
  +maxmemory-policy allkeys-lru
   ```
   +
   And now ConfigMap can be created as:
  
positive.code: 
      kubectl apply -f ./templates/pod-secret-volume.yaml
  
  Open a shell to the pod to see the secrets
  
      kubectl exec -it pod-secret-volume /bin/bash
      ls /etc/foo
  
negative.code:     echo $SECRET_USERNAME
      echo $SECRET_PASSWORD
  
  The above commands illustrate how to see the secret values via environment variables.
  
  