ANSIBLE不'；t工作-语法检查

我正试着在我的第一本剧本上设置ansible。 霍夫。。。不管我想测试哪个例子。。我收到了类似的错误：

"xyz is not a valid attribute for a Play"

例如：

 $ cat a2.yml
- name: Update and upgrade
  become: true
  apt:
    upgrade: yes
    update_cache: yes


$ ansible-playbook a2.yml --syntax-check
ERROR! 'apt' is not a valid attribute for a Play

The error appears to have been in '/home/pi/My/ansible/a2.yml': line 1, column 3, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:


- name: Update and upgrade
  ^ here

怎么了

附言

见文件。 您的条目应该是

任务

项

---
- hosts: ...
  tasks:
    - name: Update and upgrade
      become: true
      apt:
        upgrade: yes
        update_cache: yes

可能重复的工程；-）我没有意识到“任务”是强制性的。（整个概念对我来说有点不清楚）。谢谢你的帮助。

---
- hosts: ...
  tasks:
    - name: Update and upgrade
      become: true
      apt:
        upgrade: yes
        update_cache: yes