elasticsearch DSL语法：增删改查

最新推荐文章于 2025-04-09 17:34:06 发布

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Charles-Su

最新推荐文章于 2025-04-09 17:34:06 发布

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分类专栏： ELK 文章标签： elasticsearch java 数据库 es

本文链接：https://blog.youkuaiyun.com/happygjcd/article/details/106404890

版权

文章目录

本文档主要是跟着官方文档操作的

语法规则

es提供restful API风格的查询

curl -X <动作> ‘< protocol >://:/ ?<query_string>’-d ‘ < body > ’

-X指定动作，比如PUT等，-d后面跟一个json字符串

另外，我们可以使用es-head插件或者postman会更方便

查看集群的健康状态

curl -X GET "10.10.31.8:9200/_cat/health?v&pretty"

[root@lvs ~]# curl -X GET "10.10.31.8:9200/_cat/health?v&pretty"
epoch      timestamp cluster status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1590648220 06:43:40  my-es   green           3         3      0   0    0    0        0             0                  -                100.0%

查看集群节点

curl -X GET "10.10.31.8:9200/_cat/nodes?pretty"

[root@lvs ~]# curl -X GET "10.10.31.8:9200/_cat/nodes?pretty"
10.10.31.8  23 91 6 0.11 0.12 0.09 mdi - node-1
10.10.31.28  9 93 0 0.00 0.02 0.05 mdi * node-2
10.10.31.26 12 96 0 0.00 0.01 0.05 mdi - node-3

列出所有的指数

 curl -X GET "10.10.31.8:9200/_cat/indices?v&pretty"

[root@lvs ~]# curl -X GET "10.10.31.8:9200/_cat/indices?pretty"
[root@lvs ~]# curl -X GET "10.10.31.8:9200/_cat/indices?v&pretty"
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size

这表示集群中尚没有索引

创建一个索引

创建索引的语句：- X后面使用动作PUT

curl -X PUT "10.10.31.8:9200/customer?pretty&pretty"

实操：创建并查看索引

[root@lvs ~]# curl -X PUT "10.10.31.8:9200/customer?pretty&pretty"
{
   
  "acknowledged" : true,
  "shards_acknowledged" : true,
  "index" : "customer"
}
[root@lvs ~]# curl -X GET "10.10.31.8:9200/_cat/indices?v&pretty"
health status index    uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   customer eNXdpm_KQdq5V1Q7gPvrBQ   5   1          0            0      1.2kb           631b

向这个索引中添加一个document

curl -X PUT "10.10.31.8:9200/customer/doc/1?pretty&pretty" -H 'Content-Type: application/json' -d'
{
  "name": "John Doe"
}
'

[root@lvs ~]# curl -X PUT "10.10.31.8:9200/customer/doc/1?pretty&pretty" -H 'Content-Type: application/json' -d'
{
   
  "name": "John Doe"
}
'
{
   
  "_index" : "customer",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 1,
  "result" : "created",
  "_shards" : {
   
    "total" : 2,
    "successful" : 2,
    "failed" : 0
  },
  "_seq_no" : 0,
  "_primary_term" : 2
}

从上面可以看到，在customer索引中成功创建了一个新的客户文档。该文档的内部ID为1，这是我们在索引时指定的。

重要的是要注意，Elasticsearch不需要您首先显式创建索引，然后才能将文档建立索引。在上一个示例中，Elasticsearch将自动创建事先不存在的客户索引。

现在，让我们检索刚刚索引的文档：

DSL语句：

curl -X GET "localhost:9200/customer/doc/1?pretty&pretty"

[root@lvs ~]# curl -X GET "localhost:9200/customer/doc/1?pretty&pretty"
{
   
  "_index" : "customer",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 1,
  "_seq_no" : 0,
  "_primary_term" : 2,
  "found" : true,
  "_source" : {
   
    "name" : "John Doe"
  }
}

删除索引

现在，我们删除索引，然后再次列出所有的索引

curl -X DELETE "localhost:9200/customer?pretty&pretty"
curl -X GET "localhost:9200/_cat/indices?v&pretty"

[root@lvs ~]# curl -X DELETE "localhost:9200/customer?pretty&pretty"
{
   
  "acknowledged" : true
}
[root@lvs ~]# curl -X GET "localhost:9200/_cat/indices?v&pretty"
health status index uuid pri rep docs.count docs.deleted store.size pri.stor

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