Fork me on GitHub

elasticsearch简单使用

一、索引与文档

 

 

//查看索引相关信息
GET movies

//查看索引文档总数
GET movies/_count

 

二、集群与分片

1,查看集群的健康状况 GET _cluster/health 

green - 主分片副本都正常分配

yellow - 主分片全部正常分配,有副本分片未能正常分配

red - 有主分片未能分配(例如,当服务器的磁盘容量超过85%时。去创建了一个新的索引)

2,查询节点: GET _cat/nodes 

3,查询分片: GET _cat/shards 

 

三、CRUD与批量操作

1,crud

index: 针对整个文档,既可以新增又可以更新;
create:只是新增操作,已有报错,可以用PUT指定ID,或POST不指定ID;
update:指的是部分更新,官方只是说用POST,请求body里用script或 doc里包含文档要更新的部分;
delete和read:就是delete和get请求了,比较简单。

//创建文档,自动生成 _id
POST user/_doc
{
  "user":"hunter",
  "post_date":"2020-04-06T20:35:20"
}

//创建文档,指定id,如果已存在报错,不存在修改
PUT user/_doc/2?op_type=create
{
  "user":"hunter",
  "post_date":"2020-04-06T20:35:20"
}
PUT user/_create/3
{
  "user":"hunter",
  "post_date":"2020-04-06T20:35:20"
}

//查询_id=1的文档
GET user/_doc/3

//删除指定的文档
DELETE user/_doc/3

//删除

POST employees/_delete_by_query
{
"track_total_hits": true,
"query": {
"bool": {
"filter": [
{"terms": {
"name.keyword": [
"李四"
]
}}
]
}
}
}

 
//批量修改

POST project_demo/_update_by_query
{
"script":{
"source":"ctx._source['is_deleted']=2"
},
"query": {
"bool": {
"filter": {
"term": {
"system_tag": "2"
}
}
}
}
}




//在原文档上增加字段
POST user/_update/3
{
  "doc":{
      "age":"20",
      "post_date":"2020-04-06T20:35:21"
  }
}

POST employees/_update/DOBxx3MBH3d_nFQ4zJ-J
{
"doc":{
"name":"张飞"
}
}

 

 

2,批量操作

①一次api调用,对不同的索引进行操作

//新增文档、修改文档值、删除文档
POST _bulk
{ "index":{"_index":"test","_id":"1"}}
{"field1":"value1"}
{ "update":{"_index":"test","_id":"1"}}
{"doc":{ "field1":"value2"}}
{"delete":{"_index":"test","_id":"1"}}

post _bulk
{"create":{"_index":"employees"}}
{"name":"李四","age":20,"mobile":"1300000000"}


POST employees/_bulk
{"index":{}}
{"name":"王五","age":20,"mobile":"1300000000"}

 ②批量读取

GET _mget
{
  "docs":[
      {
        "_index":"user",
        "_id":"3"
      },
      {
        "_index":"movies",
        "_id":"3"
      }
    ]
}

③批量查询

GET movies/_msearch
{}
{"query":{"match_all":{}},"size":1}}
{"index":"user"}
{"query":{"match_all":{}},"size":1}}

 

四、常见错误返回

 

posted on 2020-04-06 15:58  *Hunter  阅读(410)  评论(0编辑  收藏  举报

导航

AmazingCounters.com