【Elasticsearch】第6篇:Elasticsearch的CURD
curl简单介绍
简单的认为是可以在命令行下面访问url的一个工具,使用curl可以简单实现常见的get/post请求。curl命令详解
curl 命令:
-X 指定http的请求方法 有HEAD GET POST PUT DELETE -d 指定要传输的数据 -H 指定http请求头信息 -i 获取响应头
cat系列
用于获取Elasticsearch集群状态接口
curl -XGET 'http://localhost:9200/_cat'
接口展示:
=^.^= /_cat/allocation /_cat/shards /_cat/shards/{index} /_cat/master /_cat/nodes /_cat/tasks /_cat/indices /_cat/indices/{index} /_cat/segments /_cat/segments/{index} /_cat/count /_cat/count/{index} /_cat/recovery /_cat/recovery/{index} /_cat/health /_cat/pending_tasks /_cat/aliases /_cat/aliases/{alias} /_cat/thread_pool /_cat/thread_pool/{thread_pools} /_cat/plugins /_cat/fielddata /_cat/fielddata/{fields} /_cat/nodeattrs /_cat/repositories /_cat/snapshots/{repository} /_cat/templates
cluster系列
1.集群系统信息,包括CPU JVM等
curl -XGET 'https://localhost:9200/_cluster/stats?pretty=true'
2.集群的详细信息,节点、分片等
curl -XGET 'http://localhost:9200/_cluster/state?pretty=true'
3.集群堆积的任务
curl -XGET 'http://localhost:9200/_cluster/pending_tasks?pretty=true'
集群关闭操作
1.关闭集群节点
curl -XPOST 'http://localhost:9200/_cluster/nodes/127.0.0.1/_shutdown'
2.关闭主节点
curl -XPOST 'http://localhost:9200/_cluster/nodes/_master/_shutdown'
3.关闭整个集群
curl -XPOST 'http://localhost:9200/_cluster/nodes/_all/_shutdown'
Index的建立和删除
查看全部索引
curl -XGET 'http://localhost:9200/_cat/indices?v'
新建Index
1.命令创建:
curl -XPUT 'http://localhost:9200/city' 结果: { "acknowledged": true, "shards_acknowledged": true, "index": "city" }
2.elasticsearch-head创建:
3.删除索引
curl -XDELETE 'http://localhost:9200/account'
数据的简单操作
添加数据
curl -H 'Content-Type: application/json' -XPOST 'http://localhost:9200/city/south/1' -d '{"cityName":"guangzhou"}'
结果
{ "_index":"city", "_type":"south", "_id":"1", "_version":1, "result":"created", "_shards":{ "total":2, "successful":2, "failed":0 }, "_seq_no":0, "_primary_term":1 }
查询数据
curl -i -XGET 'http://localhost:9200/city/south/1'
结果
{ "_index":"city", "_type":"south", "_id":"1", "_version":1, "found":true, "_source":{ "cityName":"guangzhou" } }
删除数据
curl -XDELETE 'http://localhost:9200/city/south/1'
结果
{ "_index":"city", "_type":"south", "_id":"1", "_version":2, "result":"deleted", "_shards":{ "total":2, "successful":2, "failed":0 }, "_seq_no":1, "_primary_term":1 }
更新数据
curl -i -H 'Content-Type: application/json' -XPUT 'http://localhost:9200/city/south/1' -d '{"cityName":"HUNAN"}'
结果
HTTP/1.1 200 OK content-type: application/json; charset=UTF-8 content-length: 153 { "_index":"city", "_type":"south", "_id":"1", "_version":2, "result":"updated", "_shards":{ "total":2, "successful":2, "failed":0 }, "_seq_no":3, "_primary_term":2 }
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另外一部分,则需要先做聚类、分类处理,将聚合出的分类结果存入ES集群的聚类索引中。数据处理层的聚合结果存入ES中的指定索引,同时将每个聚合主题相关的数据存入每个document下面的某个field下。
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