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Comment utiliser la variable imbriquée Ansible?

J'ai un playbook Ansible comme celui ci-dessous, je veux utiliser une variable imbriquée comme ceci: msg={{{{Component}}.community_release_num}}, mais quand je lance le playbook:

ansible-playbook vartest.yml -e 'version=version_402', it not work 

[es@vpn-server nested-var]$ tree
.
├── vars
│   ├── horizon.yml
│   └── version_402.yml
└── vartest.yml

1 directory, 3 files
[es@vpn-server nested-var]$ cat vartest.yml 
---

- name: test 
  hosts: localhost
  vars_files:
    - vars/{{version}}.yml
  tasks:
    - debug: msg={{{{Component}}.community_release_num}}
    - debug: msg={{{{Component}}.release_num}}

[es@vpn-server nested-var]$ cat vars/horizon.yml 
Component: horizon

[es@vpn-server nested-var]$ cat vars/version_402.yml 
- horizon:
   community_release_num: '9.0.1'
   release_num: '4.0.2'
[es@vpn-server nested-var]$

messages d'erreur

[es@vpn-server nested-var]$ ansible-playbook vartest.yml -e 'version=version_402'
/usr/lib64/python2.6/site-packages/cryptography/__init__.py:25: DeprecationWarning: Python 2.6 is no longer supported by the Python core team, please upgrade your Python.
  DeprecationWarning

PLAY [test] *******************************************************************************************************
/usr/lib64/python2.6/site-packages/Crypto/Util/number.py:57: PowmInsecureWarning: Not using mpz_powm_sec.  You should rebuild using libgmp >= 5 to avoid timing attack vulnerability.
  _warn("Not using mpz_powm_sec.  You should rebuild using libgmp >= 5 to avoid timing attack vulnerability.", PowmInsecureWarning)

TASK [debug] ******************************************************************************************************
fatal: [localhost]: FAILED! => {"failed": true, "msg": "template error while templating string: expected token 'colon', got '}'. String: {{{{Component}}.community_release_num}}"}
    to retry, use: --limit @/data/wangqian/artemis-code-test/artemis/ansible/update/nested-var/vartest.retry

PLAY RECAP ********************************************************************************************************
localhost                  : ok=0    changed=0    unreachable=0    failed=1

Ansible peut-il utiliser une variable imbriquée, si oui, comment l'utiliser?

ansiblejinja2
10
qianwang

Par FAQ Ansible :

Une autre règle est "les moustaches ne s’empilent pas". Nous voyons souvent ceci:

{{ somevar_{{other_var}} }}

Ce qui précède NE FONCTIONNE PAS, si vous devez utiliser une variable dynamique, utilisez le dictionnaire hostvars ou vars selon le cas:

{{ hostvars[inventory_hostname]['somevar_' + other_var] }}

Donc dans votre cas:

- debug: msg={{hostvars[inventory_hostname][Component].community_release_num}}

Ou:

- debug: msg={{vars[Component].community_release_num}}

Ou (depuis Ansible 2.5):

- debug: msg={{(lookup('vars', Component)).community_release_num}}
17
techraf