ElasticSearch安装和API操作

2019-10-08 10:25 295人阅读评论(0)

为什么用ES

简单说就是ES通过分词和倒排索引，专门处理关键字搜索场景，可以参考这篇文章：https://www.cnblogs.com/luxiaoxun/p/5452502.html

入门推荐ES权威指南：https://es.xiaoleilu.com/010_Intro/00_README.html

进阶还是需要看官方文档：https://www.elastic.co/guide/en/elasticsearch/reference/master/query-filter-context.html

ElasticSearch-PHP：https://www.elastic.co/guide/cn/elasticsearch/php/current/_quickstart.html

安装运行

下载：https://www.elastic.co/cn/downloads/elasticsearch

安装：将解压后的文件夹移动到/usr/local/elasticsearch

启动：nohup ./elasticsearch -Ecluster.name=why_cluster -Enode.name=why_node

概念解析

Relational DB -> Databases -> Tables -> Rows -> Columns
Elasticsearch -> Indices   -> Types  -> Documents -> Fields

node：节点，一个es实例代表一个节点
分布式集群：es是分布式数据库，多个node组成一个集群
index：一个node有多个index，可以理解为index为database
type：table
document：row
field：column

日志文件

大部分日志文件都有log和json两种格式：

-rw-r--r--   1 why  staff        0 10  5 16:45 why_cluster_deprecation.log
-rw-r--r--   1 why  staff        0 10  5 16:45 why_cluster_audit.json
-rw-r--r--   1 why  staff        0 10  5 16:45 why_cluster_deprecation.json
-rw-r--r--   1 why  staff        0 10  5 16:45 why_cluster_index_indexing_slowlog.log
-rw-r--r--   1 why  staff        0 10  5 16:45 why_cluster_index_search_slowlog.log
-rw-r--r--   1 why  staff        0 10  5 16:45 why_cluster_index_search_slowlog.json
-rw-r--r--   1 why  staff        0 10  5 16:45 why_cluster_index_indexing_slowlog.json
-rw-r--r--   1 why  staff    35210 10  5 16:57 why_cluster_server.json
-rw-r--r--   1 why  staff    19243 10  5 16:57 why_cluster.log
-rw-r--r--   1 why  staff   285078 10  5 17:13 gc.log

启动日志文件：

why_cluster.log
why_cluster_server.log

慢查询日志文件：

why_cluster_index_search_slowlog.log
why_cluster_index_search_slowlog.json

慢查询索引文件：

why_cluster_index_indexing_slowlog.log
why_cluster_index_indexing_slowlog.json

查询日志文件：

gc.log：

每有一次客户端查询，会看到一个java偏向锁相关的Cleanup记录

[2019-10-05T09:36:16.804+0000][57933][safepoint    ] Application time: 2.0066631 seconds
[2019-10-05T09:36:16.804+0000][57933][safepoint    ] Entering safepoint region: Cleanup
[2019-10-05T09:36:16.804+0000][57933][safepoint    ] Leaving safepoint region
[2019-10-05T09:36:16.804+0000][57933][safepoint    ] Total time for which application threads were stopped: 0.0002716 seconds, Stopping threads took: 0.0000905 seconds

RESTful API

前言：末尾的pretty&pretty是为了格式化显示

创建index

curl -XPUT 'localhost:9200/why_index&pretty'
{"acknowledged":true,"shards_acknowledged":true,"index":"why_index&pretty"}

查看index

-XGET 'localhost:9200/_cat/indices?v&pretty'
health status index            uuid                   pri rep docs.count docs.deleted store.size pri.store.size
yellow open   why_index&pretty CRd3kQOqRnOY_gocUde8MQ   1   1          0            0       230b           230b

根据id添加或更新document

curl -XPUT 'localhost:9200/why_index/doc/1?pretty&pretty' -H 'Content-Type:application/json' -d '{"name":"why", "age":18}'
{
  "_index" : "why_index",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 1,
  "result" : "created",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 0,
  "_primary_term" : 1
}

直接插入document

（注意：生产环境一般都会根据mysql的主键id插入，直接插入会根据base64算法自动生成id，此时无法根据id查询）

执行两次：
-XPOST 'localhost:9200/why_index/doc?pretty&pretty' -H 'Content-Type:application/json' -d '{"name":"why", "age":18}'

-XPOST 'localhost:9200/why_index/doc?pretty&pretty' -H 'Content-Type:application/json' -d '{"name":"why", "age":18}'


查看结果：
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"desc"} }'
{
  "took" : 723,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pgIwpW0Bn2hKxg6BO6zm",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "pgIwpW0Bn2hKxg6BO6zm"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pQIvpW0Bn2hKxg6BQaxV",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "pQIvpW0Bn2hKxg6BQaxV"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "weihaoyu",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      }
    ]
  }
}

根据id查询某个document

curl -XGET 'localhost:9200/why_index/doc/1?pretty&pretty'
{
  "_index" : "why_index",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 1,
  "_seq_no" : 0,
  "_primary_term" : 1,
  "found" : true,
  "_source" : {
    "name" : "why",
    "age" : 18
  }
}

通过url传参query查询

普通查询
curl -XGET 'localhost:9200/why_index/_search?q=*&pretty&pretty'
{
  "took" : 104,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "name" : "why",
          "age" : 18
        }
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : 1.0,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        }
      }
    ]
  }
}



升序查询：
curl -XGET 'localhost:9200/why_index/_search?q=*&sort=_id:asc&pretty&pretty'
{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      }
    ]
  }
}



降序查询：
curl -XGET 'localhost:9200/why_index/_search?q=*&sort=_id:desc&pretty&pretty'
{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      }
    ]
  }
}


查询name包含why的记录
curl -XGET 'localhost:9200/why_index/_search?q=name:why&sort=_id:desc&pretty&pretty'
{
  "took" : 8,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pgIwpW0Bn2hKxg6BO6zm",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "pgIwpW0Bn2hKxg6BO6zm"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pQIvpW0Bn2hKxg6BQaxV",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "pQIvpW0Bn2hKxg6BQaxV"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "3",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "3"
        ]
      }
    ]
  }
}

通过DSL语句查询

升序：
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"asc"} }'
{
  "took" : 1,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      }
    ]
  }
}



降序：
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"desc"} }'
{
  "took" : 4,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      }
    ]
  }
}



查询name字段包含why的记录
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match":{"name":"why"}}}'
{
  "took" : 5,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : 0.5389965,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pQIvpW0Bn2hKxg6BQaxV",
        "_score" : 0.5389965,
        "_source" : {
          "name" : "why",
          "age" : 18
        }
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pgIwpW0Bn2hKxg6BO6zm",
        "_score" : 0.5389965,
        "_source" : {
          "name" : "why",
          "age" : 18
        }
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "3",
        "_score" : 0.5389965,
        "_source" : {
          "name" : "why",
          "age" : 18
        }
      }
    ]
  }
}

根据id修改数据

curl -XPOST 'localhost:9200/why_index/doc/1/_update?pretty&pretty' -H 'Content-Type:application/json' -d '{"doc":{"name":"weihaoyu"}}'
{
  "_index" : "why_index",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 2,
  "result" : "updated",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 2,
  "_primary_term" : 1
}

修改后：
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"desc"} }'
{
  "took" : 4,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "weihaoyu",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      }
    ]
  }
}

根据id删除

删除前数据
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"asc"} }'
{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 5,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "weihaoyu",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "3",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "3"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pQIvpW0Bn2hKxg6BQaxV",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "pQIvpW0Bn2hKxg6BQaxV"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pgIwpW0Bn2hKxg6BO6zm",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "pgIwpW0Bn2hKxg6BO6zm"
        ]
      }
    ]
  }
}



删除id为3的document
curl -XDELETE 'localhost:9200/why_index/doc/3?pretty&pretty'
{
  "_index" : "why_index",
  "_type" : "doc",
  "_id" : "3",
  "_version" : 2,
  "result" : "deleted",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 8,
  "_primary_term" : 1
}


查看结果
why$ curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"asc"} }'
{
  "took" : 513,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 4,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "weihaoyu",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pQIvpW0Bn2hKxg6BQaxV",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "pQIvpW0Bn2hKxg6BQaxV"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "pgIwpW0Bn2hKxg6BO6zm",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "pgIwpW0Bn2hKxg6BO6zm"
        ]
      }
    ]
  }
}

删除符合条件的document

查看删除前数据
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"asc"} }'
{
  "took" : 5,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 3,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "3",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "3"
        ]
      }
    ]
  }
}




删除操作
curl -XPOST 'localhost:9200/why_index/_delete_by_query?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match":{"name":"why"}}}'
{
  "took" : 85,
  "timed_out" : false,
  "total" : 2,
  "deleted" : 2,
  "batches" : 1,
  "version_conflicts" : 0,
  "noops" : 0,
  "retries" : {
    "bulk" : 0,
    "search" : 0
  },
  "throttled_millis" : 0,
  "requests_per_second" : -1.0,
  "throttled_until_millis" : 0,
  "failures" : [ ]
}

查看删除后的结果
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"asc"} }'
{
  "took" : 5,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "3",
        "_score" : null,
        "_source" : {
          "name" : "jzm",
          "age" : 18
        },
        "sort" : [
          "3"
        ]
      }
    ]
  }
}

批量操作

操作前数据
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"asc"} }'
{
  "took" : 7,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "1"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "3",
        "_score" : null,
        "_source" : {
          "name" : "jiaozimeng",
          "age" : 18
        },
        "sort" : [
          "3"
        ]
      }
    ]
  }
}




执行操作：更新id为3的数据、根据id=2更新插入数据、删除id=1的数据
curl -XPOST 'localhost:9200/why_index/doc/_bulk?pretty&pretty' -H 'Content-Type:application/json' -d '
{"update":{"_id":3}}
{"doc":{"name":"weihaoyu"}}
{"index":{"_id":2}}
{"name":"why","age":18}
{"delete":{"_id":1}}
> '
{
  "took" : 37,
  "errors" : false,
  "items" : [
    {
      "update" : {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "3",
        "_version" : 3,
        "result" : "updated",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 7,
        "_primary_term" : 1,
        "status" : 200
      }
    },
    {
      "index" : {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_version" : 1,
        "result" : "created",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 8,
        "_primary_term" : 1,
        "status" : 201
      }
    },
    {
      "delete" : {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "1",
        "_version" : 2,
        "result" : "deleted",
        "_shards" : {
          "total" : 2,
          "successful" : 1,
          "failed" : 0
        },
        "_seq_no" : 9,
        "_primary_term" : 1,
        "status" : 200
      }
    }
  ]
}




查看结果
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"asc"} }'
{
  "took" : 3,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 2,
      "relation" : "eq"
    },
    "max_score" : null,
    "hits" : [
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "2",
        "_score" : null,
        "_source" : {
          "name" : "why",
          "age" : 18
        },
        "sort" : [
          "2"
        ]
      },
      {
        "_index" : "why_index",
        "_type" : "doc",
        "_id" : "3",
        "_score" : null,
        "_source" : {
          "name" : "weihaoyu",
          "age" : 18
        },
        "sort" : [
          "3"
        ]
      }
    ]
  }
}

删除index

curl -XDELETE 'localhost:9200/why_index/?pretty&pretty'
{
  "acknowledged" : true
}


再查询返回404
curl -XGET 'localhost:9200/why_index/_search?pretty&pretty' -H 'Content-Type:application/json' -d '{"query":{"match_all":{}}, "sort":{"_id":"asc"} }'
{
  "error" : {
    "root_cause" : [
      {
        "type" : "index_not_found_exception",
        "reason" : "no such index [why_index]",
        "resource.type" : "index_or_alias",
        "resource.id" : "why_index",
        "index_uuid" : "_na_",
        "index" : "why_index"
      }
    ],
    "type" : "index_not_found_exception",
    "reason" : "no such index [why_index]",
    "resource.type" : "index_or_alias",
    "resource.id" : "why_index",
    "index_uuid" : "_na_",
    "index" : "why_index"
  },
  "status" : 404
}

持续学习补充ing...

转载：https://blog.csdn.net/why444216978/article/details/102158738

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