anchor.diff:  ----
   This little trick, will allow calling the `elasticsearch` role, yet running only a part of it.
   
  -We can also create a fake step including all the steps (more on that later):
  +We can also create a fake step including all the steps, it will allow to run the whole role as before (more on that later):
   
   .roles/elasticsearch/tasks/all.yml
   [source,yaml]
  
positive.code: ----
  
  This naive Ansible playbook will stop all Elasticsearch nodes at the same time, 
  making the whole cluster unavailable until nodes are started again.
  To fix this problem, the role can be ran in serial instead of parallel:
  
  .deploy.yml
  
negative.code:       elasticsearch_step: "after"
  ----
  
  Or even simpler, we can use the fake `all` step:
  
  .playbook.yml
  