1、查看当前 【索引】 状态

http://localhost:9200/_cat/indices?v

2、设置 log 【type】

PUT   http://localhost:9200/core_data 
{
    "mappings": {
        "log": {
            "properties": {
                "@timestamp": {
                    "type": "date",
                    "format": "epoch_second"
                },
                "log_msg": {
                    "type": "text",
                    "index": "true"
                }
            }
        }
    }
}

3、删除指定的 【索引】

DELETE    http://localhost:9200/core_data*

4、插入一条数据

{"@timestamp": 1520507705, "log_msg": "hahahaha"}