glance/api-ref/source/v2/samples/usage-response.json

{
    "usage": {
        "image_size_total": {
            "limit": 1024,
            "usage": 256
        },
        "image_count_total": {
            "limit": 10,
            "usage": 2
        },
        "image_stage_total": {
            "limit": 512,
            "usage": 0
        },
        "image_count_uploading": {
            "limit": 2,
            "usage": 0
        }
    }
}