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Вы можете просто использовать {{ ansible_ssh_host }} Например:

Инвентарь:

[my_hosts]
my_host ansible_ssh_host=127.0.0.1 my_host_alias=my_host

Playbook:

---
- name: My Good playbook
  user: ubuntu
  hosts: all

  tasks:
    - name: My message
      debug: msg="Myhost is {{ ansible_ssh_host }}"

    - name: My message bogus
      debug: msg="My host alias is {{ my_host_alias }}"

Исполнение:

$ ansible-playbook -i inventory play.yml

PLAY [My Good playbook] *******************************************************

GATHERING FACTS ***************************************************************
ok: [my_host]

TASK: [My message] ************************************************************
ok: [my_host] => {
    "msg": "Myhost is 127.0.0.1"
}

TASK: [My message bogus] ******************************************************
ok: [my_host] => {
    "msg": "My host alias is my_host"
}

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