http://stackoverflow.com/questions/29368686/pass-ansible-variables-from-one-role-running-on-one-host-to-another-role-runni/29369121#29369121

gistfile1.txt

---
- name: test hostvars host1
  hosts: LBL
  tasks:
  - shell: echo `hostname`
    register: ls_out
  - set_fact:
      ls_down: '{{ ls_out.stdout }}'

- name: test hostvars
  hosts: LM
  tasks:
  - debug: msg='Res is {{hostvars.LBL.ls_down}}'