如何获取Ansible playbook运行失败信息

ansible-playbook your_playbook.yml

[defaults]
log_path = /var/log/ansible.log

from ansible.plugins.callback import CallbackBase

class CallbackModule(CallbackBase):
    CALLBACK_VERSION = 2.0
    CALLBACK_TYPE = 'notification'
    CALLBACK_NAME = 'custom_callback'

    def v2_runner_on_failed(self, result, **kwargs):
        host = result._host
        print(f"Task failed on {host.name}: {result.task_name}")
        print(result._result)

[defaults]
callback_plugins = /path/to/callback_plugins

---
- hosts: webservers
  tasks:
    - name: Ensure Apache is installed
      yum:
        name: httpd
        state: present
    - name: Start Apache service
      service:
        name: httpd
        state: started

ansible-playbook example.yml

TASK [Ensure Apache is installed] *********************************************
fatal: [webserver1]: FAILED! => {"changed": false, "msg": "No package httpd available.", "results": []}