Ansible不收集标签事实

问题描述

当我使用--tags来过滤将要执行的任务时,我习惯于使用ansible-playbook。 我最近从Ansible 2.7切换到2.9(巨大的距离,是吗?)。

当我在使用--tags时,ansible并没有专门收集事实,这让我感到惊讶。而且我看到GitHub中有多个类似的案例,例如this onethis one。从2.8版本开始似乎影响ansible,但显示为已解决。有人可以确认这种行为吗?似乎是从2.8开始的。

ANSIVERSION

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]

ANSI CONFIG

ansible-config dump --only-changed

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

要复制的步骤

playbook 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

“该任务包括带有未定义变量的选项。错误是:'ansible_product_uuid'未定义[...]”

我可以在输出中看到没有收集事实。

解决方法

好吧,当您在播放级别上放置标签时,这似乎是有目的的行为:

这是预期的行为。使用标签标记剧本会将这些标签应用于gather_facts步骤,并删除默认情况下应用的always标签。如果目标是标记剧本,则可以添加带有标签的setup任务以收集事实。

samdoran 评论了on 11 Jun 2019


请注意,因此,这与角色的使用无关,因为只需执行以下操作即可复制:

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

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

回顾失败的地方

$ 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  

因此,您将必须删除播放级别的标签,或者根据提示使用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。

赋予角色 roles / test / tasks / main.yml

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

还有剧本:

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

  roles:
    - role: test
      tags: 
        - test

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

  roles:
    - role: test
      tags: 
        - test

这是运行和总结:

$ 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]

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