gistfile1.txt

$ ansible-playbook -i hosts playbook.yml -vvv
No config file found; using defaults
1 plays in playbook.yml

PLAY ***************************************************************************

TASK [ping] ********************************************************************
task path: /Users/mga/Documents/Arbeitsmittel/Ansible-Bug mit ansible_host Template/playbook.yml:4
<osf4-management1.osf.credativ.lan> ESTABLISH SSH CONNECTION FOR USER: None
<osf4-management1.osf.credativ.lan> SSH: EXEC ssh -C -q -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/Users/mga/.ansible/cp/ansible-ssh-%h-%p-%r -tt osf4-management1.osf.credativ.lan '( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1454593572.41-8142288545326 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1454593572.41-8142288545326 )" )'
<osf4-management1.osf.credativ.lan> PUT /var/folders/0w/8d7_0wfn4_5_rytt3201v0k00000gn/T/tmpeGI8Td TO /home/mga/.ansible/tmp/ansible-tmp-1454593572.41-8142288545326/ping
<osf4-management1.osf.credativ.lan> SSH: EXEC sftp -b - -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/Users/mga/.ansible/cp/ansible-ssh-%h-%p-%r '[osf4-management1.osf.credativ.lan]'
<osf4-management1.osf.credativ.lan> ESTABLISH SSH CONNECTION FOR USER: None
<osf4-management1.osf.credativ.lan> SSH: EXEC ssh -C -q -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/Users/mga/.ansible/cp/ansible-ssh-%h-%p-%r -tt osf4-management1.osf.credativ.lan 'LANG=de_DE.UTF-8 LC_ALL=de_DE.UTF-8 LC_MESSAGES=de_DE.UTF-8 /usr/bin/python /home/mga/.ansible/tmp/ansible-tmp-1454593572.41-8142288545326/ping; rm -rf "/home/mga/.ansible/tmp/ansible-tmp-1454593572.41-8142288545326/" > /dev/null 2>&1'
ok: [osf4-management1] => {"changed": false, "invocation": {"module_args": {"data": null}, "module_name": "ping"}, "ping": "pong"}

TASK [ping] ********************************************************************
task path: /Users/mga/Documents/Arbeitsmittel/Ansible-Bug mit ansible_host Template/playbook.yml:5
<osf4-management1.osf.credativ.lan> ESTABLISH SSH CONNECTION FOR USER: None
<osf4-management1.osf.credativ.lan> SSH: EXEC ssh -C -q -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/Users/mga/.ansible/cp/ansible-ssh-%h-%p-%r -tt osf4-management1.osf.credativ.lan '( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1454593572.73-65199493527378 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1454593572.73-65199493527378 )" )'
<osf4-management1.osf.credativ.lan> PUT /var/folders/0w/8d7_0wfn4_5_rytt3201v0k00000gn/T/tmpLTRlX4 TO /home/mga/.ansible/tmp/ansible-tmp-1454593572.73-65199493527378/ping
<osf4-management1.osf.credativ.lan> SSH: EXEC sftp -b - -C -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/Users/mga/.ansible/cp/ansible-ssh-%h-%p-%r '[osf4-management1.osf.credativ.lan]'
<osf4-management1.osf.credativ.lan> ESTABLISH SSH CONNECTION FOR USER: None
<osf4-management1.osf.credativ.lan> SSH: EXEC ssh -C -q -o ControlMaster=auto -o ControlPersist=60s -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o ConnectTimeout=10 -o ControlPath=/Users/mga/.ansible/cp/ansible-ssh-%h-%p-%r -tt osf4-management1.osf.credativ.lan 'LANG=de_DE.UTF-8 LC_ALL=de_DE.UTF-8 LC_MESSAGES=de_DE.UTF-8 /usr/bin/python /home/mga/.ansible/tmp/ansible-tmp-1454593572.73-65199493527378/ping; rm -rf "/home/mga/.ansible/tmp/ansible-tmp-1454593572.73-65199493527378/" > /dev/null 2>&1'
ok: [osf4-management1 -> {{inventory_hostname}}.osf.credativ.lan] => {"changed": false, "invocation": {"module_args": {"data": null}, "module_name": "ping"}, "ping": "pong"}

PLAY RECAP *********************************************************************
osf4-management1           : ok=2    changed=0    unreachable=0    failed=0   

gistfile2.txt

$ ansible --version
ansible 2.0.0.2
  config file = 
  configured module search path = Default w/o overrides

hosts

osf4-management1
osf4-nfs1

[all:vars]
ansible_host={{inventory_hostname}}.osf.credativ.lan

playbook.yml

- hosts: osf4-management1
  gather_facts: no
  tasks:
    - ping:
    - ping:
      delegate_to: osf4-nfs1