Execution of openshift-logging ansible playbooks ends with curl error

Issue

• When executing the ansible-playbook ./playbooks/openshift-logging/config.yml the execution stops with the following curl error:

  $ cd /usr/share/ansible/openshift-ansible
  $ ansible-playbook -vvvv ./playbooks/openshift-logging/config.yml
  
  [...]
  
  fatal: [master1.example.com]: FAILED! => {"changed": true, "cmd": ["curl", "-s", "-k", "--cert", "/tmp/openshift-logging-ansible-GPfLi8/admin-cert", "--key", "/tmp/openshift-logging-ansible-GPfLi8/admin-key", "https://logging-es.openshift-logging.svc:9200/_cluster/health?pretty"], "delta": "0:00:17.539403", "end": "2020-03-05 09:24:51.560669", "msg": "non-zero return code", "rc": 6, "start": "2020-03-05 09:24:34.021266", "stderr": "", "stderr_lines": [], "stdout": "", "stdout_lines": []}
  
  [...]