如何确认ansible任务不在运行列表中的原因

Question

playbook: test.yaml

  play #1 (lab): lab    TAGS: []
    tasks:
      Install pip       TAGS: []

当我执行剧本时，这确实是正常的

PLAY [lab] *****************************************************************************************************************************

TASK [Gathering Facts] *****************************************************************************************************************
ok: [my_ipaddress]

TASK [Install pip] *********************************************************************************************************************
ok: [my_ipaddress]

PLAY RECAP *****************************************************************************************************************************
my_ipaddress              : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

并且在/var/log/ansible.log中也看起来和执行输出一样正常

所以问题是，我必须做更少的设置吗？为什么有一个任务不在执行列表中，或者有其他调试输出可以显示更详细的输出信息？

以下是我的ansible配置
OS版本:Ubuntu 18.04.5LTS
ansible版本：

ansible 2.9.12
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/primula/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/primula/.local/lib/python3.6/site-packages/ansible
  executable location = /home/primula/.local/bin/ansible
  python version = 3.6.9 (default, Jul 17 2020, 12:50:27) [GCC 8.4.0]

---
- hosts: lab
  roles:
    - { role: apache2, become: yes }
    - { role: pip, become: yes }

---
  - name: Install apache2
    apt:
      name: apache2
      update_cache: yes

---
  - name: Install pip
    apt:
      name: python-pip
      update_cache: yes

[lab]
<ipaddress> ansible_ssh_user=<user_name> ansible_ssh_pass='<ssh_pass>'  ansible_become_user=<root_user> ansible_become=true  ansible_become_pass='<root_pass>'

ansible.cfg

[defaults]
private_key_file = /root/.ssh/id_rsa
roles_path = /etc/ansible/roles
inventory      = /etc/ansible/hosts
timeout = 10
log_path = /var/log/ansible.log
deprecation_warnings = False
strategy = debug
any_errors_fatal = True

Answer 1

使用ansible-playbook--list-tasks your_playbook.yml时，不在执行列表中的任务是与由setup模块完成的事实收集相关的任务

它是一个隐式自动任务，默认情况下为您播放中的所有主机打开。如果是隐式的，则不由上述命令报告。

您可以使用gather_factsplay关键字在播放级别控制事实收集，例如。

---
- name: Some play without facts gathering
  hosts: my_group
  gather_facts: false

  tasks:
    - name: dummy demo task
      debug:
        msg: I am dummy task