☰

在 Ansible 中将数组设置为默认值

tag-icon • tag-icon ansible
在 Ansible 中将数组设置为默认值

如果变量为空，我想设置一个默认数组。在默认过滤器中设置一个空数组的工作原理如下所述这里. 设置存储在变量中的数组则不会。

在示例中run_targets为undefined，targets应改用 。

- name: Set vars
  vars:
    targets: [target1, target2, target3]

- name: Include run sql task
      include: tasks/sql.yml
      with_items: "{{ run_targets | defult(targets) }}"

有什么办法可以做到这一点？

答案1

您的剧本无效。vars不是您可以在任务中运行的模块。您可以在游戏级别使用set_fact或声明vars。以下完整示例表明它可以正常工作：

---
- name: Demo of default from var
  hosts: localhost
  gather_facts: false

  vars:
    default_targets:
      - target1
      - target2
      - target3

  tasks:
    - name: Show run targets else defaults
      debug:
        msg: "{{ run_targets | default(default_targets) }}"

这使：

$ ansible-playbook playbook.yml 

PLAY [Demo of default from var] ************************************************

TASK [Show run targets else defaults] ******************************************
ok: [localhost] => {
    "msg": [
        "target1",
        "target2",
        "target3"
    ]
}

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

$ ansible-playbook playbook.yml -e "{run_targets: [a,b,c]}"

PLAY [Demo of default from var] ************************************************

TASK [Show run targets else defaults] ******************************************
ok: [localhost] => {
    "msg": [
        "a",
        "b",
        "c"
    ]
}

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

相关内容