Share host variables with ansible

gistfile1.yml

---
- hosts: etcd
  gather_facts: false
  sudo: false

  tasks:
  - command: etcdctl get somepassword
    register: somepassword

- hosts: other
  sudo: true
  gather_facts: false

  tasks:
  - name: Test
    command: 'echo {{ hostvars[groups.etcd[0]].somepassword }}'