Recommend a way to json dump / ray head node args as string?

1

I need to send ray head node arguments as a string but I am not sure how to do so.

Consider this example from Object Spilling — Ray 2.7.0

import json
d = {
    "max_io_workers": 4,  # More IO workers for remote storage.
    "min_spilling_size": 100 * 1024 * 1024,  # Spill at least 100MB at a time.
    "object_spilling_config": json.dumps(
        {
        "type": "smart_open",
        "params": {
            "uri": "s3://bucket/path"
        },
        "buffer_size": 100 * 1024 * 1024,  # Use a 100MB buffer for writes
        },
    )
}

json.dumps(d)

ray start --head --system-config='{"max_io_workers": 4, "min_spilling_size": 104857600, "object_spilling_config": "{\\"type\\": \\"smart_open\\", \\"params\\": {\\"uri\\": \\"s3://bucket/path\\"}, \\"buffer_size\\": 104857600}"}'

Yields Error: Invalid value