IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Elasticsearch input plugin

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Elasticsearch input plugin

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Plugin version: v4.3.3
Released on: 2019-11-12
Changelog

For other versions, see the Versioned plugin docs.

Installation

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For plugins not bundled by default, it is easy to install by running bin/logstash-plugin install logstash-input-elasticsearch. See Working with plugins for more details.

Getting Help

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For questions about the plugin, open a topic in the Discuss forums. For bugs or feature requests, open an issue in Github. For the list of Elastic supported plugins, please consult the Elastic Support Matrix.

Description

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Compatibility Note

Starting with Elasticsearch 5.3, there’s an HTTP setting called http.content_type.required. If this option is set to true, and you are using Logstash 2.4 through 5.2, you need to update the Elasticsearch input plugin to version 4.0.2 or higher.

Read from an Elasticsearch cluster, based on search query results. This is useful for replaying test logs, reindexing, etc. You can periodically schedule ingestion using a cron syntax (see schedule setting) or run the query one time to load data into Logstash.

Example:

    input {
      # Read all documents from Elasticsearch matching the given query
      elasticsearch {
        hosts => "localhost"
        query => '{ "query": { "match": { "statuscode": 200 } }, "sort": [ "_doc" ] }'
      }
    }

This would create an Elasticsearch query with the following format:

    curl 'http://localhost:9200/logstash-*/_search?&scroll=1m&size=1000' -d '{
      "query": {
        "match": {
          "statuscode": 200
        }
      },
      "sort": [ "_doc" ]
    }'

Scheduling

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Input from this plugin can be scheduled to run periodically according to a specific schedule. This scheduling syntax is powered by rufus-scheduler. The syntax is cron-like with some extensions specific to Rufus (e.g. timezone support ).

Examples:

`* 5 * 1-3 *`	will execute every minute of 5am every day of January through March.
`0 * * * *`	will execute on the 0th minute of every hour every day.
`0 6 * * * America/Chicago`	will execute at 6:00am (UTC/GMT -5) every day.

Further documentation describing this syntax can be found here.

Elasticsearch Input Configuration Options

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This plugin supports the following configuration options plus the Common Options described later.

Setting	Input type	Required
`ca_file`	a valid filesystem path	No
`docinfo`	boolean	No
`docinfo_fields`	array	No
`docinfo_target`	string	No
`hosts`	array	No
`index`	string	No
`password`	password	No
`query`	string	No
`schedule`	string	No
`scroll`	string	No
`size`	number	No
`slices`	number	No
`ssl`	boolean	No
`user`	string	No

Also see Common Options for a list of options supported by all input plugins.

`ca_file`

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Value type is path
There is no default value for this setting.

SSL Certificate Authority file in PEM encoded format, must also include any chain certificates as necessary.

`docinfo`

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Value type is boolean
Default value is false

If set, include Elasticsearch document information such as index, type, and the id in the event.

It might be important to note, with regards to metadata, that if you’re ingesting documents with the intent to re-index them (or just update them) that the action option in the elasticsearch output wants to know how to handle those things. It can be dynamically assigned with a field added to the metadata.

Example

    input {
      elasticsearch {
        hosts => "es.production.mysite.org"
        index => "mydata-2018.09.*"
        query => '{ "query": { "query_string": { "query": "*" } } }'
        size => 500
        scroll => "5m"
        docinfo => true
      }
    }
    output {
      elasticsearch {
        index => "copy-of-production.%{[@metadata][_index]}"
        document_type => "%{[@metadata][_type]}"
        document_id => "%{[@metadata][_id]}"
      }
    }

Starting with Logstash 6.0, the document_type option is deprecated due to the removal of types in Logstash 6.0. It will be removed in the next major version of Logstash.

`docinfo_fields`

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Value type is array
Default value is ["_index", "_type", "_id"]

If document metadata storage is requested by enabling the docinfo option, this option lists the metadata fields to save in the current event. See Meta-Fields in the Elasticsearch documentation for more information.

`docinfo_target`

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Value type is string
Default value is "@metadata"

If document metadata storage is requested by enabling the docinfo option, this option names the field under which to store the metadata fields as subfields.

`hosts`

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Value type is array
There is no default value for this setting.

List of one or more Elasticsearch hosts to use for querying. Each host can be either IP, HOST, IP:port, or HOST:port. The port defaults to 9200.

`index`

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Value type is string
Default value is "logstash-*"

The index or alias to search. See Multi Indices documentation in the Elasticsearch documentation for more information on how to reference multiple indices.

`password`

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Value type is password
There is no default value for this setting.

The password to use together with the username in the user option when authenticating to the Elasticsearch server. If set to an empty string authentication will be disabled.

`query`

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Value type is string
Default value is '{ "sort": [ "_doc" ] }'

The query to be executed. Read the Elasticsearch query DSL documentation for more information.

`schedule`

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Value type is string
There is no default value for this setting.

Schedule of when to periodically run statement, in Cron format for example: "* * * * *" (execute query every minute, on the minute)

There is no schedule by default. If no schedule is given, then the statement is run exactly once.

`scroll`

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Value type is string
Default value is "1m"

This parameter controls the keepalive time in seconds of the scrolling request and initiates the scrolling process. The timeout applies per round trip (i.e. between the previous scroll request, to the next).

`size`

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Value type is number
Default value is 1000

This allows you to set the maximum number of hits returned per scroll.

`slices`

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Value type is number
There is no default value.
Sensible values range from 2 to about 8.

In some cases, it is possible to improve overall throughput by consuming multiple distinct slices of a query simultaneously using the Sliced Scroll API, especially if the pipeline is spending significant time waiting on Elasticsearch to provide results.

If set, the slices parameter tells the plugin how many slices to divide the work into, and will produce events from the slices in parallel until all of them are done scrolling.

The Elasticsearch manual indicates that there can be negative performance implications to both the query and the Elasticsearch cluster when a scrolling query uses more slices than shards in the index.

If the slices parameter is left unset, the plugin will not inject slice instructions into the query.

`ssl`

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Value type is boolean
Default value is false

If enabled, SSL will be used when communicating with the Elasticsearch server (i.e. HTTPS will be used instead of plain HTTP).

`user`

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Value type is string
There is no default value for this setting.

The username to use together with the password in the password option when authenticating to the Elasticsearch server. If set to an empty string authentication will be disabled.

Common Options

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The following configuration options are supported by all input plugins:

Setting	Input type	Required
`add_field`	hash	No
`codec`	codec	No
`enable_metric`	boolean	No
`id`	string	No
`tags`	array	No
`type`	string	No

Details

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`add_field`

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Value type is hash
Default value is {}

Add a field to an event

`codec`

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Value type is codec
Default value is "json"

The codec used for input data. Input codecs are a convenient method for decoding your data before it enters the input, without needing a separate filter in your Logstash pipeline.

`enable_metric`

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Value type is boolean
Default value is true

Disable or enable metric logging for this specific plugin instance by default we record all the metrics we can, but you can disable metrics collection for a specific plugin.

`id`

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Value type is string
There is no default value for this setting.

Add a unique ID to the plugin configuration. If no ID is specified, Logstash will generate one. It is strongly recommended to set this ID in your configuration. This is particularly useful when you have two or more plugins of the same type, for example, if you have 2 elasticsearch inputs. Adding a named ID in this case will help in monitoring Logstash when using the monitoring APIs.

input {
  elasticsearch {
    id => "my_plugin_id"
  }
}

`tags`

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Value type is array
There is no default value for this setting.

Add any number of arbitrary tags to your event.

This can help with processing later.

`type`

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Value type is string
There is no default value for this setting.

Add a type field to all events handled by this input.

Types are used mainly for filter activation.

The type is stored as part of the event itself, so you can also use the type to search for it in Kibana.

If you try to set a type on an event that already has one (for example when you send an event from a shipper to an indexer) then a new input will not override the existing type. A type set at the shipper stays with that event for its life even when sent to another Logstash server.

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