ansible 属性错误 : 'list' object has no attribute 'startswith'

Question

我正在运行 ansible 并尝试执行此任务，但失败并显示以下错误:

An exception occurred during task execution. To see the fulltraceback, use -vvv. The error was: AttributeError: 'list' object hasno attribute 'startswith' fatal: [test-1]: FAILED! =>{"failed": true, "msg": "Unexpected failure during module execution.","stdout": ""} msg: Unexpected failure during module execution.

代码是:

  - name: Register env Type
    shell: facter configured_setup
    register: setup

  - name: foo tasks
    shell: {{some_script}} -t -a {{hosts}} -i {{inventory_hostname}}
    register: test
    when: setup.stdout == "something"

  - name: fetch group_vars
    fetch:
      src:
       - { "{{ item }}", when: setup.stdout == "something" }
      dest: "{{group_vars}}"
      flat: yes
    with_items:
      - "{{ test.stdout_lines[0] }}"
      - "{{ test.stdout_lines[1] }}"

“fetch group_vars”是总是失败的任务，知道这是如何工作的吗？
我想要做的是添加更多源文件以从不同的 setvers 中获取。
所以我想在“src:”下有更多的行，说 - { filename, when setup.stdout =="something else" }完整的错误是:

An exception occurred during task execution. The full traceback is:Traceback (most recent call last):File "/usr/lib/python2.7/site-packages/ansible/executor/task_executor.py", line 96, in runitem_results = self._run_loop(items)File "/usr/lib/python2.7/site-packages/ansible/executor/task_executor.py", line 252, in _run_loopres = self._execute(variables=task_vars)File "/usr/lib/python2.7/site-packages/ansible/executor/task_executor.py", line 446, in _executeresult = self._handler.run(task_vars=variables)File "/usr/lib/python2.7/site-packages/ansible/plugins/action/fetch.py", line 62, in runsource = self._remote_expand_user(source)File "/usr/lib/python2.7/site-packages/ansible/plugins/action/init.py", line 460, in _remote_expand_userif not path.startswith('~'): # FIXME: Windows paths may start with "~ instead of just ~AttributeError: 'list' object has no attribute 'startswith'

fatal: [test-1]: FAILED! => {"failed": true, "msg":"Unexpected failure during module execution.", "stdout": ""} msg:Unexpected failure during module execution.

Answer 1

ansible documentation clearly states that fetch 是获取一个文件，而不是一个文件列表。尽管可以对应用程序进行编程以处理从 YAML 文档加载的标量和序列，但这不是自动的，并且几乎肯定会反射(reflect)在文档中。

由于您已经拥有更高级别的序列，因此只需扩展它即可。

- name: Register env Type
  shell: facter configured_setup
  register: setup

- name: transparency tasks
  shell: {{some_script}} -t -a {{hosts}} -i {{inventory_hostname}}
  register: test
  when: setup.stdout == "something"

- name: fetch group_vars
  fetch:
    src: { "{{ item }}", when: setup.stdout == "something" }
    dest: "{{group_vars}}"
    flat: yes
  with_items:
    - "{{ test.stdout_lines[0] }}"
    - "{{ test.stdout_lines[1] }}"

- name: fetch group_vars2
  fetch:
    src: { filename, when setup.stdout =="something else" }
    dest: "{{group_vars}}"
    flat: yes
  with_items:
    - "{{ test.stdout_lines[0] }}"
    - "{{ test.stdout_lines[1] }}"

您可能可以通过使用 YAML 的 anchor 和 merge 来减少重复性。 :

- name: Register env Type
  shell: facter configured_setup
  register: setup

- name: transparency tasks
  shell: {{some_script}} -t -a {{hosts}} -i {{inventory_hostname}}
  register: test
  when: setup.stdout == "something"

- &fetchtask
  name: fetch group_vars
  fetch: &fetchsrc
    src: { "{{ item }}", when: setup.stdout == "something" }
    dest: "{{group_vars}}"
    flat: yes
  with_items:
    - "{{ test.stdout_lines[0] }}"
    - "{{ test.stdout_lines[1] }}"

- <<: *fetchtask
  name: fetch group_vars2
  fetch:
    <<: *fetchsrc
    src: { filename, when setup.stdout =="something else" }

Ansible 大概扩展了 {{...}}在将文档交给 YAML 解析器之前，否则为 shell 的值在“透明任务”中会抛出错误。但是您可能仍然应该像使用 dest 的值一样引用它。