callbacks example, step by step

[JohnP]

Hi All,

Can anyone explain "callbacks" mechanism?
As I can see, there are a many callbacks files in ansible/plugins/callbacks/*.py
The format of them more or less "similar". Only the differentiator is the filename.
How do I target the "right one" from my playbook.yml files?
Any example would be truly appreciated.

JohnP

[James Cammarata]

There is no way to specify the callback via a playbook. To use them, you must use the Ansible API directly. Callbacks are used in the ansible and ansible-playbook system scripts, if you want to see how they're used there. Any further questions regarding using the API are best sent to the ansible-devel mailing list, so if you have any further questions let us know there.

Thanks!

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[Michael DeHaan]

Not entirely.   They can't be set in playbooks but you *do not* have to use the API.

DEFAULT_CALLBACK_PLUGIN_PATH   = get_config(p, DEFAULTS, 'callback_plugins',   'ANSIBLE_CALLBACK_PLUGINS', '/usr/share/ansible_plugins/callback_plugins')




This is from callbacks.py


What this means is that any python files found in the directories found in the variable ANSIBLE_CALLBACK_PLUGINS or any modules copied into /usr/share/ansible_plugins/callback_plugins are automatically loaded and used as callbacks.

Here are a few examples FWIW:

https://github.com/ansible/ansible/tree/devel/plugins/callbacks


Though I do recommend the devel list and would like to see more activity on it.  Feel free to stop by!

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