如何从 Ansible 中设置模块的输出中获取列表的第一个元素?

How to get the first element of a list from the output of setup module in Ansible?

我从设置模块收到了以下数据:

"ansible_nodename": "3d734bc2a391",
"ansible_os_family": "RedHat",
"ansible_pkg_mgr": "yum",
"ansible_processor": [
  "AuthenticAMD",
  "AMD PRO A10-8700B R6, 10 Compute Cores 4C+6G"
],
"ansible_processor_cores": 1,
"ansible_processor_count": 1,
"ansible_processor_threads_per_core": 1,

我想检索 ansible_processor 的第一个值并在 Jinja2 模板中使用它。

如果我使用 {{ ansible_processor }},它会给我两个值:

"AuthenticAMD",
"AMD PRO A10-8700B R6, 10 Compute Cores 4C+6G"

但我只想要第一个

获取列表的第一项:

- debug:
    msg: "First item: {{ ansible_processor[0] }}"

或者:

- debug:
    msg: "First item: {{ ansible_processor | first }}"

试试这个常见的处理这种情况:

参考:

# from list
- debug:
    msg: "First item: {{ ansible_processor[0] }}"
# from output, like 'https://xxx.xx/xxx/xxx.git'
- debug:
    msg: "git repo's name: {{ (item| urlsplit('path')| basename | splitext)[0] }}"