Elastic分布式搜索，如何对索引(表)进行增删改查管理？

HEAD /my_index

PUT /my_index
{
  "settings": {
    "number_of_shards": 3,
    "number_of_replicas": 2
  },
  "mappings": {
    "properties": {
      "field1": { "type": "text" },
      "field2": { "type": "keyword" }
    }
  }
}

GET /my_index

GET /my_index/_settings

GET /my_index/_mappings

PUT /my_index/_mapping
{
  "properties": {
    "new_field": { "type": "text" }
  }
}

PUT /my_index/_settings
{
  "number_of_shards": 5
}

{
  "error": {
    "root_cause": [
      {
        "type": "illegal_argument_exception",
        "reason": "Can't update non dynamic settings [[index.number_of_shards]] for open indices [[my_index/ciQuucKlR7KvNlqwFFZnyg]] unless the `reopen` query parameter is set to true. Alternatively, close the indices, apply the settings changes, and reopen the indices"
      }
    ],
    "type": "illegal_argument_exception",
    "reason": "Can't update non dynamic settings [[index.number_of_shards]] for open indices [[my_index/ciQuucKlR7KvNlqwFFZnyg]] unless the `reopen` query parameter is set to true. Alternatively, close the indices, apply the settings changes, and reopen the indices"
  },
  "status": 400
}

DELETE /my_index

POST /my_index/_open

POST /my_index/_close