问add_host范围

EN

---
# ansible/site.yml

- hosts: localhost
  gather_facts: yes
  connection: local
  sudo: no
  roles:
    - ec2

- hosts: ec2hosts
  gather_facts: yes
  user: ubuntu
  roles:
    - supervisor

--- 
# ansible/roles/ec2/main.yml

# Provision EC2 instances
# ...
  register: ec2

- name: Add EC2 instances to host groups
  add_host: hostname={{ item.public_ip }} groups=ec2hosts
  with_items: ec2.instances

# inventory/hosts
[local]
localhost

[ec2hosts]

ansible-playbook -i ansible/inventory/hosts ansible/site.yml -vvv    

...

TASK [ec2 : Add EC2 instances to host groups] ***************************

PLAY *******************************************************************
skipping: no hosts matched

PLAY RECAP **************************************************************
localhost                  : ok=3    changed=0    unreachable=0    failed=0