Ansible 不收集标签上的事实

Question

我习惯用--tags，而我在用ansible-playbook过滤要执行的任务。我最近从 Ansible 2.7 切换到 2.9（差距很大，嗯？）。

我很惊讶 ansible 在我使用 --tags 时没有专门收集事实。我看到 GitHub 中有多个类似的案件已结案，例如 this one or this one。它似乎从 2.8 版本开始影响 ansible，但显示为已解决。有人可以确认这种行为吗？它似乎从 2.8 开始发生。

ANSIBLE 版本 :

ansible --version

ansible 2.9.9.post0
  config file = None
  configured module search path = [u'/opt/ansible/ansible/library']
  ansible python module location = /opt/ansible/ansible/lib/ansible
  executable location = /opt/ansible/ansible/bin/ansible
  python version = 2.7.6 (default, Nov 13 2018, 12:45:42) [GCC 4.8.4]

可配置 :

ansible-config dump --only-changed

DEFAULT_MODULE_PATH(env: ANSIBLE_LIBRARY) = [u'/opt/ansible/ansible/library']

重现步骤：

剧本test.yml:

- name: First test
  hosts: localhost
  connection: local
  gather_facts: yes
  roles:
    - { role: test, tags: test }
  tags: first

- name: Second test
  hosts: localhost
  connection: local
  gather_facts: yes
  roles:
    - { role: test, tags: test }
  tags: second

角色：roles/test/tasks/main.yml

- debug:
    msg: System {{ inventory_hostname }} has uuid {{ ansible_product_uuid }}

结果 :

ansible-playbook test.yml --check

= 没有错误。

ansible-playbook test.yml --check --tags "test"

=失败：1

"The task includes an option with an undefined variable. The error was: 'ansible_product_uuid' is undefined [...]"

而且我可以在输出中看到没有收集到事实。

Answer 1

好吧，当你在游戏关卡上有标签时，这似乎是一种有目的的行为：

This is intended behavior. Tagging a play with tags applies those tags to the gather_facts step and removes the always tag which is applied by default. If the goal is to tag the play, you can add a setup task with tags in order to gather facts.

samdoran commented on 11 Jun 2019

请注意这与角色的使用无关，因为它可以通过简单的操作重现：

- name: First test
  hosts: all
  tags:
    - first

  tasks:
    - debug:
        msg: System {{ inventory_hostname }} has uuid {{ ansible_product_uuid }}
      tags: test

导致失败的重述：

$ ANSIBLE_STDOUT_CALLBACK=debug ansible-playbook play.yml --tags "test"

PLAY [First test] *************************************************************************************************

TASK [debug] ******************************************************************************************************
fatal: [localhost]: FAILED! => {}

MSG:

The task includes an option with an undefined variable. The error was: 'ansible_product_uuid' is undefined

The error appears to be in '/ansible/play.yml': line 7, column 7, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

  tasks:
    - debug:
      ^ here


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

所以你要么必须删除你玩关卡的标签，要么按照提示使用setup模块。

这可以在您的角色内部完成，因此您的角色不再依赖可能无法设置的变量。

给定角色roles/test/tasks/main.yml

- setup:
- debug:
    msg: System {{ inventory_hostname }} has uuid {{ ansible_product_uuid }}

剧本：

- name: First test
  hosts: all
  tags:
    - first

  roles:
    - role: test
      tags: 
        - test

- name: Second test
  hosts: all
  tags: 
    - second

  roles:
    - role: test
      tags: 
        - test

这里是运行并回顾一下：

$ ansible-playbook play.yml --tags "test"

PLAY [First test] *************************************************************************************************

TASK [test : setup] ***********************************************************************************************
ok: [localhost]

TASK [test : debug] ***********************************************************************************************
ok: [localhost] => {
    "msg": "System localhost has uuid 3fc44bc9-0000-0000-b25d-bf9e26ce0762"
}

PLAY [Second test] ************************************************************************************************

TASK [test : setup] ***********************************************************************************************
ok: [localhost]

TASK [test : debug] ***********************************************************************************************
ok: [localhost] => {
    "msg": "System localhost has uuid 3fc44bc9-0000-0000-b25d-bf9e26ce0762"
}

PLAY RECAP ********************************************************************************************************
localhost                  : ok=4    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

所有这些运行于：

ansible 2.9.9
  config file = None
  configured module search path = ['/root/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.8/site-packages/ansible
  executable location = /usr/bin/ansible
  python version = 3.8.3 (default, May 15 2020, 01:53:50) [GCC 9.3.0]

Ansible 不收集标签上的事实

Ansible not gathering facts on tags

tags

ansible

ansible-facts

结果 :