{
    "policy": {
        "description": "rotate 1mb primary shards",
        "default_state": "hot_state",
        "states": [
            {
                "name": "hot_state",
                "actions": [
                    {
                        "rollover": {
                            "min_primary_shard_size": "1mb"
                        }
                    }
                ]
            }
        ],
        "ism_template": [
            {
                "index_patterns": [
                    "test-index*"
                ]
            }
        ]
    }
}