elasticsearch-4. 常用命令请求

常用命令请求

1. 获取健康状况

GET /_cat/health?v

2. 获取集群中节点列表

GET /_cat/nodes?v

3. 获取索引列表

GET /_cat/indices?v

4. 创建名字为customer的索引

PUT /customer?pretty

5. 给customer索引存入数据

PUT /customer/doc/1?pretty
{
  "name": "John Doe"
}

Elasticsearch并不要求你在索引文档之前先显性的创建索引。在4、5步骤中，如果在执行步骤5时，customer索引还没有创建，Elasticsearch将会自动的创建这个索引

6. 删除索引

DELETE /customer?pretty

访问数据命令模板为：<REST Verb> /<Index>/<Type>/<ID>

7. 修改数据

PUT /customer/doc/1?pretty
{
  "name": "Jane Doe"
}

8. 非显性的指定id，elasticsearch会自动创建

POST /customer/doc?pretty
{
  "name": "Jane Doe"
}

9. 更新文档

POST /customer/doc/1/_update?pretty
{
  "doc": { "name": "Jane Doe" }
}

10. 更新并添加数据

POST /customer/doc/1/_update?pretty
{
  "doc": { "name": "Jane Doe", "age": 20 }
}

11. 删除文档

DELETE /customer/doc/2?pretty

12. 批量操作，使用_bulk

• 索引两个文档

POST /customer/doc/_bulk?pretty
{"index":{"_id":"1"}}
{"name": "John Doe" }
{"index":{"_id":"2"}}
{"name": "Jane Doe" }

• 更新id=1的文档，删除id=2的文档

POST /customer/doc/_bulk?pretty
{"update":{"_id":"1"}}
{"doc": { "name": "John Doe becomes Jane Doe" } }
{"delete":{"_id":"2"}}

13. 搜索，通过_search

• 通过请求URL

GET /bank/_search?q=*&sort=account_number:asc&pretty //返回bank索引的所有文档

- q=* 匹配bank索引中的所有文档
- sort=account_number:asc 使用每个文档中的account_number字段进行升序排序
- pretty 告诉Elasticsearch返回 pretty-printed JSON 结果

• 通过请求体

GET /bank/_search
{
  "query": { "match_all": {} },
  "sort": [
    { "account_number": "asc" }
  ]
}

• 结果解析

{
  "took" : 63,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 1000,
    "max_score" : null,
    "hits" : [ {
      "_index" : "bank",
      "_type" : "account",
      "_id" : "0",
      "sort": [0],
      "_score" : null,
      "_source" : {"account_number":0,"balance":16623,"firstname":"Bradshaw","lastname":"Mckenzie","age":29,"gender":"F","address":"244 Columbus Place","employer":"Euron","email":"bradshawmckenzie@euron.com","city":"Hobucken","state":"CO"}
    }, {
      "_index" : "bank",
      "_type" : "account",
      "_id" : "1",
      "sort": [1],
      "_score" : null,
      "_source" : {"account_number":1,"balance":39225,"firstname":"Amber","lastname":"Duke","age":32,"gender":"M","address":"880 Holmes Lane","employer":"Pyrami","email":"amberduke@pyrami.com","city":"Brogan","state":"IL"}
    }, ...
    ]
  }
}

- took Elasticsearch查询耗费时间，单位毫秒
- timed_out 查询是否超时
- _shards 查询了多少个分片，和查询成功/跳过/失败的分片的数量
- hits 查询结果
- hits.total 匹配搜索条件的所有文档数
- hits.hits 搜索结果的实际数组（默认前10个文档）
- hits.sort 结果排序的key
- hits._score 和 max_score 现在可以忽略的字段