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Json (or Want Json) is a Module type.

A non-native module accepts a filename as its only command line parameter. Ansible creates this file with the module parameters and pass it to the module.

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Process / Dev

The non-native module needs to:

• open the file, (ie a JSON temporary file containing the module’s parameters)
• read and parse the parameters,
• operate on the data,
• and print its return data as a JSON encoded dictionary to stdout before exiting.

These types of modules are self-contained entities. As of Ansible 2.1, Ansible only modifies them to change a shebang line if present.

Example

• https://github.com/ansible/ansible-for-rubyists

Documentation / Reference

• https://docs.ansible.com/ansible/latest/dev_guide/developing_program_flow_modules.html#flow-want-json-modules