Reserving resources for system processes on a node not working

Issue

• On this page : https://docs.openshift.com/enterprise/3.1/admin_guide/overcommit.html#reserving-resources-for-system-processes you explain how to reserving resources for system processes.

What we do :
- create /etc/origin/node/resource-reserver.yaml file with this content:

apiVersion: v1
kind: Pod
metadata:
  name: resource-reserver
spec:
  containers:
  - name: sleep-forever
    image: gcr.io/google_containers/pause:0.8.0
    resources:
      limits:
        cpu: 100m 
        memory: 150Mi 
 -  restarted the node

When we check by docker ps command or docker images we see nothing about the sleep-forever pod.
Inside logs we also don't see anything.

Note that we have a completely standard installation of openshift (through ansible) and I can see that the node is running with this config:

root     117724  2.6  1.4 589200 72684 ?        Ssl  13:35   0:22 /usr/bin/openshift start node --config=/etc/origin/node/node-config.yaml --loglevel=2