ansible group_by example using register

group_by_register

- hosts: all

  tasks:

  #- name: Create a group of all hosts by operating system
  #  action: group_by key=${ansible_distribution}-${ansible_distribution_version}

  #- name: Create a group of all hosts by operating system
  #  action: group_by key=${ansible_distribution}-${ansible_distribution_version}

  - name: register this a lucid
    action: shell lsb_release -sc 
    register: codename


  - name: Create a group of all hosts by operating system
    action: group_by key=${codename.stdout}


# the following host group does not exist in inventory and was created by the group_by
# module.

 
#- hosts: Ubuntu-10.04
#
#  tasks:
#
#  - name: ping all CentOS 6.2 hosts
#    action: ping

- hosts: lucid
  tasks:

  - name: ping lucid hosts 
    action: ping