我想列出ElasticSearch服务器上的所有索引。我试了一下:

curl -XGET localhost:9200/

但它给了我这个:

{
  "ok" : true,
  "status" : 200,
  "name" : "El Aguila",
  "version" : {
    "number" : "0.19.3",
    "snapshot_build" : false
  },
  "tagline" : "You Know, for Search"
}

我想要一个所有索引的列表..


当前回答

如果你使用scala,一种方法是创建一个RequestExecutor,然后使用IndicesStatsRequestBuilder和管理客户端来提交你的请求。

import org.elasticsearch.action.{ ActionRequestBuilder, ActionListener, ActionResponse }
import scala.concurrent.{ Future, Promise, blocking }

/** Convenice wrapper for creating RequestExecutors */
object RequestExecutor {
    def apply[T <: ActionResponse](): RequestExecutor[T] = {
        new RequestExecutor[T]
    }
}

/** Wrapper to convert an ActionResponse into a scala Future
 *
 *  @see http://chris-zen.github.io/software/2015/05/10/elasticsearch-with-scala-and-akka.html
 */
class RequestExecutor[T <: ActionResponse] extends ActionListener[T] {
    private val promise = Promise[T]()

    def onResponse(response: T) {
        promise.success(response)
    }

    def onFailure(e: Throwable) {
        promise.failure(e)
    }

    def execute[RB <: ActionRequestBuilder[_, T, _, _]](request: RB): Future[T] = {
        blocking {
            request.execute(this)
            promise.future
        }
    }
}

执行器摘自这篇博客文章,如果您试图以编程方式而不是通过curl查询ES,那么这篇文章绝对是一本不错的读物。首先,你可以很容易地创建一个所有索引的列表,如下所示:

def totalCountsByIndexName(): Future[List[(String, Long)]] = {
    import scala.collection.JavaConverters._
    val statsRequestBuider = new IndicesStatsRequestBuilder(client.admin().indices())
    val futureStatResponse = RequestExecutor[IndicesStatsResponse].execute(statsRequestBuider)
    futureStatResponse.map { indicesStatsResponse =>
        indicesStatsResponse.getIndices().asScala.map {
            case (k, indexStats) => {
                val indexName = indexStats.getIndex()
                val totalCount = indexStats.getTotal().getDocs().getCount()
                    (indexName, totalCount)
                }
        }.toList
    }
}

client是client的实例,可以是节点或传输客户端,取决于您的需要。您还需要在这个请求的作用域中有一个隐式的ExecutionContext。如果你试图在没有导入它的情况下编译这段代码,那么你会从scala编译器那里得到一个警告,告诉你如果你还没有导入它的话,该如何得到它。

我需要文档计数,但如果你真的只需要索引的名称,你可以从地图的键拉他们,而不是从IndexStats:

indicesStatsResponse.getIndices().keySet()

这个问题会在你搜索如何做到这一点时出现,即使你试图以编程的方式做到这一点,所以我希望这能帮助任何想在scala/java中做到这一点的人。否则,curl用户可以按照上面的答案使用

curl http://localhost:9200/_aliases

其他回答

您还可以使用获取特定的索引

curl -X GET "localhost:9200/<INDEX_NAME>"
e.g.   curl -X GET "localhost:9200/twitter"
You may get output like:
{
  "twitter": {
     "aliases": { 

     },
     "mappings": { 

     },
     "settings": {
     "index": {
        "creation_date": "1540797250479",
        "number_of_shards": "3",
        "number_of_replicas": "2",
        "uuid": "CHYecky8Q-ijsoJbpXP95w",
        "version": {
            "created": "6040299"
        },
       "provided_name": "twitter"
      }
    }
  }
}

更多信息

https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-get-index.html

_stats命令提供了通过指定所需指标来自定义结果的方法。要获得索引,查询如下:

GET /_stats/indices

_stats查询的一般格式是:

/_stats
/_stats/{metric}
/_stats/{metric}/{indexMetric}
/{index}/_stats
/{index}/_stats/{metric}

指标在哪里:

indices, docs, store, indexing, search, get, merge, 
refresh, flush, warmer, filter_cache, id_cache, 
percolate, segments, fielddata, completion

作为对自己的练习,我写了一个小的elasticsearch插件,提供了列出elasticsearch索引的功能,而不需要任何其他信息。你可以在以下网址找到它:

http://blog.iterativ.ch/2014/04/11/listindices-writing-your-first-elasticsearch-java-plugin/

https://github.com/iterativ/elasticsearch-listindices

curl -XGET 'http://localhost:9200/_cluster/health?水平=指数'

这将输出如下所示

{
  "cluster_name": "XXXXXX:name",
  "status": "green",
  "timed_out": false,
  "number_of_nodes": 3,
  "number_of_data_nodes": 3,
  "active_primary_shards": 199,
  "active_shards": 398,
  "relocating_shards": 0,
  "initializing_shards": 0,
  "unassigned_shards": 0,
  "delayed_unassigned_shards": 0,
  "number_of_pending_tasks": 0,
  "number_of_in_flight_fetch": 0,
  "task_max_waiting_in_queue_millis": 0,
  "active_shards_percent_as_number": 100,
  "indices": {
    "logstash-2017.06.19": {
      "status": "green",
      "number_of_shards": 3,
      "number_of_replicas": 1,
      "active_primary_shards": 3,
      "active_shards": 6,
      "relocating_shards": 0,
      "initializing_shards": 0,
      "unassigned_shards": 0
    },
    "logstash-2017.06.18": {
      "status": "green",
      "number_of_shards": 3,
      "number_of_replicas": 1,
      "active_primary_shards": 3,
      "active_shards": 6,
      "relocating_shards": 0,
      "initializing_shards": 0,
      "unassigned_shards": 0
    }}

如果你使用scala,一种方法是创建一个RequestExecutor,然后使用IndicesStatsRequestBuilder和管理客户端来提交你的请求。

import org.elasticsearch.action.{ ActionRequestBuilder, ActionListener, ActionResponse }
import scala.concurrent.{ Future, Promise, blocking }

/** Convenice wrapper for creating RequestExecutors */
object RequestExecutor {
    def apply[T <: ActionResponse](): RequestExecutor[T] = {
        new RequestExecutor[T]
    }
}

/** Wrapper to convert an ActionResponse into a scala Future
 *
 *  @see http://chris-zen.github.io/software/2015/05/10/elasticsearch-with-scala-and-akka.html
 */
class RequestExecutor[T <: ActionResponse] extends ActionListener[T] {
    private val promise = Promise[T]()

    def onResponse(response: T) {
        promise.success(response)
    }

    def onFailure(e: Throwable) {
        promise.failure(e)
    }

    def execute[RB <: ActionRequestBuilder[_, T, _, _]](request: RB): Future[T] = {
        blocking {
            request.execute(this)
            promise.future
        }
    }
}

执行器摘自这篇博客文章,如果您试图以编程方式而不是通过curl查询ES,那么这篇文章绝对是一本不错的读物。首先,你可以很容易地创建一个所有索引的列表,如下所示:

def totalCountsByIndexName(): Future[List[(String, Long)]] = {
    import scala.collection.JavaConverters._
    val statsRequestBuider = new IndicesStatsRequestBuilder(client.admin().indices())
    val futureStatResponse = RequestExecutor[IndicesStatsResponse].execute(statsRequestBuider)
    futureStatResponse.map { indicesStatsResponse =>
        indicesStatsResponse.getIndices().asScala.map {
            case (k, indexStats) => {
                val indexName = indexStats.getIndex()
                val totalCount = indexStats.getTotal().getDocs().getCount()
                    (indexName, totalCount)
                }
        }.toList
    }
}

client是client的实例,可以是节点或传输客户端,取决于您的需要。您还需要在这个请求的作用域中有一个隐式的ExecutionContext。如果你试图在没有导入它的情况下编译这段代码,那么你会从scala编译器那里得到一个警告,告诉你如果你还没有导入它的话,该如何得到它。

我需要文档计数,但如果你真的只需要索引的名称,你可以从地图的键拉他们,而不是从IndexStats:

indicesStatsResponse.getIndices().keySet()

这个问题会在你搜索如何做到这一点时出现,即使你试图以编程的方式做到这一点,所以我希望这能帮助任何想在scala/java中做到这一点的人。否则,curl用户可以按照上面的答案使用

curl http://localhost:9200/_aliases

Try

curl 'localhost:9200/_cat/indices?v'

它将以表格的方式为您提供以下自我说明的输出

health index    pri rep docs.count docs.deleted store.size pri.store.size
yellow customer   5   1          0            0       495b           495b