1. 创建索引
PUT /lujiahao123{ "acknowledged": true, "shards_acknowledged": true}索引默认的主分片数量是5，每个主分片的副本数量是1。复制代码 创建自定义字段类型的索引：
PUT /order{ "settings": { "number_of_shards": 3, "number_of_replicas": 2 }, "mappings": { "carpoolType":{ "properties": { "orderNo":{ "type": "string", "index": "not_analyzed" } } } }}#! Deprecation: The [string] field is deprecated, please use [text] or [keyword] instead on [orderNo]{ "acknowledged": true, "shards_acknowledged": true}ES5.0版本中string类型被拆分为text和keyword类型: https://www.elastic.co/blog/strings-are-dead-long-live-strings复制代码 2. 修改索引
PUT /order/_settings{ "number_of_replicas": 2}复制代码 更新分词器
POST /order/_closePUT /order/_settings{ "analysis": { "analyzer": { "content":{ "type":"customer", "tokenizer":"whitespace" } } }}POST /order/_open添加分析器之前必须先关闭索引，添加之后再打开索引。复制代码 尝试修改索引主分片数：
PUT /order/_settings{ "number_of_shards": 2}复制代码 错误提示：
{ "error": { "root_cause": [ { "type": "illegal_argument_exception", "reason": "Can't update non dynamic settings [[index.number_of_shards]] for open indices [[order/2cOJ6Ga7THCyW10idoPPig]]" } ], "type": "illegal_argument_exception", "reason": "Can't update non dynamic settings [[index.number_of_shards]] for open indices [[order/2cOJ6Ga7THCyW10idoPPig]]" }, "status": 400}主分片是无法修改的，主分片个数一旦建立就无法修改，但是看错误原因里面说因为这个是open的索引，那是不是关闭的索引就可以修改主分片个数了呢？这个我们后面再解答。复制代码 3. 删除索引
删除单个索引：DELETE /order删除索引需要指定索引名称，别名或者通配符复制代码
删除多个索引：DELETE order,order1,order2DELETE order*复制代码
删除全部索引：DELETE _allDELETE *复制代码
使用_all 和通配符删除全部索引 为了防止误删除，设置config/elasticsearch.yml属性action.destructive_requires_name=true，以禁用通配符或_all删除索引。
4. 查询索引
GET /order{ "order": { "aliases": {}, "mappings": { "carpoolType": { "properties": { "orderNo": { "type": "keyword" } } } }, "settings": { "index": { "creation_date": "1555054886098", "number_of_shards": "3", "number_of_replicas": "2", "uuid": "uSh9K26CS_q1uZKaos7NRQ", "version": { "created": "5050099" }, "provided_name": "order" } } }}复制代码 自定义返回结果的属性：
GET /order/_settings,_aliases{ "order": { "settings": { "index": { "creation_date": "1555054886098", "number_of_shards": "3", "number_of_replicas": "2", "uuid": "uSh9K26CS_q1uZKaos7NRQ", "version": { "created": "5050099" }, "provided_name": "order" } }, "aliases": {} }}复制代码 5. 打开/关闭索引
索引关闭只能显示索引元数据信息，不能够进行读写。
POST /order/_closePOST /order/_openhealth status index uuid pri rep docs.count docs.deleted store.size pri.store.sizeyellow open .kibana 8n5wnGEjRJ-aVa54l_jTjA 1 1 1 0 3.1kb 3.1kbyellow open order uSh9K26CS_q1uZKaos7NRQ 3 2 0 0 486b 486b复制代码
可以同时打开或关闭多个索引。如果指向不存在的索引会抛出错误，可通过配置ignore_unavailable=true 关闭异常提示。 禁止使用关闭索引功能，配置settingscluster.indices.close.enable为false，默认值是ture。
6. 关闭索引后尝试修改主分片个数
PUT /order/_settings{ "number_of_shards": 2}{ "error": { "root_cause": [ { "type": "illegal_argument_exception", "reason": "final order setting [index.number_of_shards], not updateable" } ], "type": "illegal_argument_exception", "reason": "final order setting [index.number_of_shards], not updateable" }, "status": 400}复制代码 解答了之前的问题，索引一旦建立，主分片数量不可改变。
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