需求
执行playbook时，什么都不显示。把回显内容丢到黑洞去。
注： 程序的警告信息还是会出现，针对ad-hoc命令无效。
callback plugin
callback_plugins/black_hole.py
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from ansible.plugins.callback.default import CallbackModule as CallbackModule_default
class CallbackModule(CallbackModule_default):
'''
Magic black hole, nothing will show up.
'''
CALLBACK_VERSION = 2.0
CALLBACK_TYPE = 'stdout'
CALLBACK_NAME = 'black_hole'
def on_any(self, *args, **kwargs):
pass
def runner_on_failed(self, host, res, ignore_errors=False):
pass
def runner_on_ok(self, host, res):
pass
def runner_on_skipped(self, host, item=None):
pass
def runner_on_unreachable(self, host, res):
pass
def runner_on_no_hosts(self):
pass
def runner_on_async_poll(self, host, res, jid, clock):
pass
def runner_on_async_ok(self, host, res, jid):
pass
def runner_on_async_failed(self, host, res, jid):
pass
def playbook_on_start(self):
pass
def playbook_on_notify(self, host, handler):
pass
def playbook_on_no_hosts_matched(self):
pass
def playbook_on_no_hosts_remaining(self):
pass
def playbook_on_task_start(self, name, is_conditional):
pass
def playbook_on_vars_prompt(self, varname, private=True, prompt=None, encrypt=None, confirm=False, salt_size=None, salt=None, default=None):
pass
def playbook_on_setup(self):
pass
def playbook_on_import_for_host(self, host, imported_file):
pass
def playbook_on_not_import_for_host(self, host, missing_file):
pass
def playbook_on_play_start(self, name):
pass
def playbook_on_stats(self, stats):
pass
def on_file_diff(self, host, diff):
pass
def v2_on_any(self, *args, **kwargs):
pass
def v2_runner_on_failed(self, result, ignore_errors=False):
pass
def v2_runner_on_ok(self, result):
pass
def v2_runner_on_skipped(self, result):
pass
def v2_runner_on_unreachable(self, result):
pass
def v2_runner_on_no_hosts(self, task):
pass
def v2_runner_on_async_poll(self, result):
pass
def v2_runner_on_async_ok(self, result):
pass
def v2_runner_on_async_failed(self, result):
pass
def v2_runner_on_file_diff(self, result, diff):
pass
def v2_playbook_on_start(self, playbook):
pass
def v2_playbook_on_notify(self, result, handler):
pass
def v2_playbook_on_no_hosts_matched(self):
pass
def v2_playbook_on_no_hosts_remaining(self):
pass
def v2_playbook_on_task_start(self, task, is_conditional):
pass
def v2_playbook_on_cleanup_task_start(self, task):
pass
def v2_playbook_on_handler_task_start(self, task):
pass
def v2_playbook_on_vars_prompt(self, varname, private=True, prompt=None, encrypt=None, confirm=False, salt_size=None, salt=None, default=None):
pass
def v2_playbook_on_setup(self):
pass
def v2_playbook_on_import_for_host(self, result, imported_file):
pass
def v2_playbook_on_not_import_for_host(self, result, missing_file):
pass
def v2_playbook_on_play_start(self, play):
pass
def v2_playbook_on_stats(self, stats):
pass
def v2_on_file_diff(self, result):
pass
def v2_playbook_on_include(self, included_file):
pass
def v2_runner_item_on_ok(self, result):
pass
def v2_runner_item_on_failed(self, result):
pass
def v2_runner_item_on_skipped(self, result):
pass
def v2_runner_retry(self, result):
pass
文件保存在playbook的当前目录callback_plugins目录下。
配置ansible.cfg
# change the default callback
stdout_callback = black_hole
# enable additional callbacks
callback_whitelist = black_hole
目录结构
[root@manager ansible]# pwd
/etc/ansible
[root@manager ansible]# tree
.
├── ansible.cfg
├── callback_plugins
│ ├── black_hole.py
│ └── black_hole.pyc
├── hosts
├── roles
└── test.yml
执行效果
[root@manager ansible]# cat test.yml
---
- hosts: localhost
tasks:
- debug: msg="hello"
[root@manager ansible]# ansible-playbook test.yml
[WARNING]: provided hosts list is empty, only localhost is available
[root@manager ansible]#
是不是很神奇呀！