Elasticsearch 7：创建和删除索引


#Elasticsearch 笔记

以下指令，在 kibana dev tools 执行。

创建索引

假设索引名是 movie ：

PUT movie

响应：

{
  "acknowledged" : true,
  "shards_acknowledged" : true,
  "index" : "movie"
}

查看索引信息

GET movie

响应：

{
  "movie" : {
    "aliases" : { },
    "mappings" : { },
    "settings" : {
      "index" : {
        "creation_date" : "1572843447230",
        "number_of_shards" : "1",
        "number_of_replicas" : "1",
        "uuid" : "AzEtRiBaQqO5JDN_l7WG-w",
        "version" : {
          "created" : "7020099"
        },
        "provided_name" : "movie"
      }
    }
  }
}

创建索引时指定 mapping 和 settings

PUT movie
{
  "mappings" : {
    "properties" : {
      "name" : {
        "type" : "keyword"
      }
    }
  },
  "settings" : {
    "index" : {
      "number_of_shards" : 1,
      "number_of_replicas" : 2
    }
  }
}

创建文档时自动创建索引

当向一个不存在的索引中写入文档时，会自动创建索引。

POST student/_doc/1
{
  "name": "张三"
}

删除索引

DELETE movie

响应：

{
  "acknowledged" : true
}

如果在删除之后，再次删除，会因为找不到索引而报错：

{
  "error" : {
    "root_cause" : [
      {
        "type" : "index_not_found_exception",
        "reason" : "no such index [movie]",
        "resource.type" : "index_or_alias",
        "resource.id" : "movie",
        "index_uuid" : "_na_",
        "index" : "movie"
      }
    ],
    "type" : "index_not_found_exception",
    "reason" : "no such index [movie]",
    "resource.type" : "index_or_alias",
    "resource.id" : "movie",
    "index_uuid" : "_na_",
    "index" : "movie"
  },
  "status" : 404
}

删除后再次使用 GET movie 查询索引信息，会报错：

{
  "error" : {
    "root_cause" : [
      {
        "type" : "index_not_found_exception",
        "reason" : "no such index [movie]",
        "resource.type" : "index_or_alias",
        "resource.id" : "movie",
        "index_uuid" : "_na_",
        "index" : "movie"
      }
    ],
    "type" : "index_not_found_exception",
    "reason" : "no such index [movie]",
    "resource.type" : "index_or_alias",
    "resource.id" : "movie",
    "index_uuid" : "_na_",
    "index" : "movie"
  },
  "status" : 404
}


( 本文完 )