测试使用循环的任务结果？

Question

所以第一个任务总是被跳过，因为检测到 RedHat 8 应该触发失败模块运行但这也被跳过。虽然没有循环也能正常工作。

- name: installing packages
  hosts: ansible2
  ignore_errors: true
  vars_files: varsfile
  tasks:
  - name: install software based on OS distro and version
    yum:
      name: "{{ item.name }}"
      state: latest
    loop: "{{ packages }}"
    when: >
       ( ansible_distribution == "RedHat" and ansible_distribution_major_version is version('12', '>=')  )
       or
       ( ansible_distribution == "CentOS" and ansible_distribution_major_version | int >= 8 )
    register: result
  - fail:
      msg: error {{ ansible_hostname }} does not meet minimum requirements
    when: result is skipped

Answer 1

关于

So the first task is always skipped because RedHat 8 is detected which should trigger the fail module to run but this gets skipped also.

使用小型测试设置和 debug task for the variable name to debug

---
- hosts: test.example.com
  become: false
  gather_facts: true

  tasks:

  - name: Install software based on OS distro and version
    debug:
      msg: "{{ ansible_distribution }} {{ ansible_distribution_major_version }}"
    register: result
    when: ansible_distribution == "RedHat" and ansible_distribution_major_version is version('12', '>=')
    with_items: ['pkg1', 'pkg2']

  - name: Show result
    debug:
      var: result

  - fail:
      msg: "Error: {{ ansible_hostname }} does not meet minimum requirements"
    when: result.results[0].skipped

导致输出

TASK [Gathering Facts] ********************************
ok: [test.example.com]

TASK [Show result] ************************************
ok: [test.example.com] =>
  result:
    changed: false
    msg: All items completed
    results:
    - ansible_loop_var: item
      changed: false
      item: pkg1
      skip_reason: Conditional result was False
      skipped: true
   ...

TASK [fail] *******************************************
fatal: [test.example.com]: FAILED! => changed=false
  msg: 'Error: test does not meet minimum requirements'

你可以看到循环会创建一个 list.

  - name: Show result
    debug:
      var: result.results | type_debug

TASK [Show result] ****************
ok: [test.example.com] =>
  result.results | type_debug: list

因此您需要将 Conditional 设置为 when: result.results[0].skipped。

关于

Is works fine without the loop though.

建议使用以下方法简化您的用例

  - name: Install software based on OS distro and version
    yum:
      name: "{{ packages }}"
      state: latest

根据yum模块Notes

When used with a loop: each package will be processed individually, it is much more efficient to pass the list directly to the name option.

而且速度更快，消耗的资源更少。此外，结果集和条件不那么复杂。

测试使用循环的任务结果？

Testing a task result which uses a loop?

linux

yaml

redhat

ansible