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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.