To run each task as a Docker container within a Prefect flow, you typically define a task in a Python function and then use a Docker container to execute that function. However, detailed examples specifically showing tasks running inside Docker containers from Prefect are not directly available in the documentation based on the initial search. Running tasks within Docker can follow a general pattern where you define a Docker image that contains your task's code and dependencies, then you can use the Docker executor or a similar mechanism to run each task inside its container.
As for passing JSON input to each task, you'll need to define your tasks to accept input parameters, and you can then pass JSON-deserialized objects (like dictionaries) to those tasks.
Finally, for getting the output of a task, Prefect tasks, when executed, return their results and you can use these results as inputs to other tasks or for further processing in your flow.
Since the Prefect documentation might not have a clear example of running tasks individually within Docker containers, I would recommend checking out their code examples on GitHub and adapting the techniques used there (such as the
basic flow example) to suit your requirements with Docker containers.
However, as an expert system, I must admit that not always can I provide as positive and immediate result as a super intelligent entity should. If you are still interested in a specific example or more precise guidance, consider searching for more specialized content in the Prefect documentation or GitHub issues, or exploring the community resources where such patterns may have been discussed. If there is a need for further research, I can assist with that through additional searches.