Elasticsearch的API操作

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Elasticsearch常用API

官方文档：Elasticsearch：官方分布式搜索和分析引擎 | Elastic

查看索引列表

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http://localhost:9200/_cat/indices?v&pretty

运行上述命令后，将会显示一个包含所有索引的表格，其中列出了索引名称、文档数量、主分片数量、副本分片数量等信息。

查询索引结构信息

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GET http://localhost:9200/索引名?pretty

查询索引所有文档数据

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GET http://localhost:9200/索引名/_search

删除索引

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DELETE http://localhost:9200/索引名

返回结果为

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{
    "acknowledged": true
}

即删除成功

删除索引下的数据

只删除数据，不删除数据结构

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POST http://localhost:9200/索引名/_delete_by_query?pretty

{
    "query":{
        "match_all":{}
    }
}

返回结果

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{
  "took": 185,
  "timed_out": false,
  "total": 10,
  "deleted": 10,
  "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": []
}

分词逻辑

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GET http://localhost:9200/_analyze

{
  "analyzer" : "standard",
  "text" : "this is a test"
}

查询最早时间

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GET /索引名/_search
{
  "size": 0,
  "aggregations": {
    "min_date": {
      "min": {
        "field": "date_field"
      }
    }
  }
}

重建索引

原索引修改别名

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curl --location --request POST 'http://localhost:9200/_aliases' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Content-Type: application/json' \
--data-raw '{
    "actions": [
        {
            "add": {
                "index": "原索引名",
                "alias": "原索引别名"
            }
        }
    ]
}'

创建新索引

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curl --location --request PUT 'http://localhost:9200/新索引名' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Content-Type: application/json' \
--data-raw '{
    "settings": {
        "index": {
            "refresh_interval": "1s",
            "number_of_shards": "5",
            "number_of_replicas": "1"
        }
    },
    "mappings": {
        "dynamic": "false",
        "properties": {
            "id": {
                "type": "keyword",
                "ignore_above": 32
            }
        }
    }
}'

同步数据到新索引

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curl --location --request POST 'http://localhost:9200/_reindex?slices=5&refresh=' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Content-Type: application/json' \
--data-raw '{
    "source": {
        "index": "旧索引名"
    },
    "dest": {
        "index": "新索引名"
    }
}'

新的索引添加别名，旧的索引去除别名

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curl --location --request POST 'http://localhost:9200/_aliases' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Content-Type: application/json' \
--data-raw '{
    "actions": [
        {
            "add": {
                "index": "新索引名",
                "alias": "新索引别名"
            }
        },
        {
            "remove": {
                "index": "旧索引名",
                "alias": "旧索引别名"
            }
        }
    ]
}'

删除旧索引

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curl --location --request DELETE 'http://localhost:9200/旧索引名' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)'

删除索引别名

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curl --location --request DELETE 'http://39.98.35.72:30011/_aliases?index=索引名别名' \
--header 'User-Agent: Apifox/1.0.0 (https://apifox.com)' \
--header 'Content-Type: application/json'