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Elasticsearch Output

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Elasticsearch Output

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When you specify Elasticsearch for the output, the Beat sends the transactions directly to Elasticsearch by using the Elasticsearch HTTP API.

Example configuration:

output:
  elasticsearch:
    # The Elasticsearch cluster
    hosts: ["http://localhost:9200"]

    # Comment this option if you don't want to store the topology in
    # Elasticsearch. The default is false.
    # This option makes sense only for Packetbeat
    # save_topology: false

    # Optional index name. The default is "packetbeat" and generates
    # [packetbeat-]YYYY.MM.DD keys.
    index: "packetbeat"

    # tls configuration. By default is off.
    tls:
      # List of root certificates for HTTPS server verifications
      certificate_authorities: ["/etc/pki/root/ca.pem"]

      # Certificate for TLS client authentication
      certificate: "/etc/pki/client/cert.pem"

      # Client Certificate Key
      certificatekey: "/etc/pki/client/cert.key"

To enable SSL, just add https to all URLs defined under hosts.

output:
  elasticsearch:
    # The Elasticsearch cluster
    hosts: ["https://localhost:9200"]

    # Comment this option if you don't want to store the topology in
    # Elasticsearch. The default is false.
    # This option makes sense only for Packetbeat
    # save_topology: false

    # HTTP basic auth
    username: "admin"
    password: "s3cr3t"

If the Elasticsearch nodes are defined by IP:PORT, then add protocol: https to the yaml file.

output:
  elasticsearch:
    # The Elasticsearch cluster
    hosts: ["localhost"]

    # Optional http or https. Default is http
    protocol: "https"

    # Comment this option if you don't want to store the topology in
    # Elasticsearch. The default is false.
    # This option makes sense only for Packetbeat
    # save_topology: false

    # HTTP basic auth
    username: "admin"
    password: "s3cr3t"

Elasticsearch Output Options

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You can specify the following options in the elasticsearch section:

hosts

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The list of Elasticsearch nodes to connect to. The events are distributed to these nodes in round robin order. If one node becomes unreachable, the event is automatically sent to another node. Each Elasticsearch node can be defined as a URL or IP:PORT. For example: http://192.15.3.2, https://es.found.io:9230 or 192.24.3.2:9300. If no port is specified, 9200 is used.

When a node is defined as an IP:PORT, the scheme and path are taken from the protocol and path config options.

output:
  elasticsearch:
    # The Elasticsearch cluster
    hosts: ["10.45.3.2:9220", "10.45.3.1:9230"]

    # Optional http or https. Default is http
    protocol: https

    # HTTP Path at which each Elasticsearch server lives
    path: /elasticsearch

In the previous example, the Elasticsearch nodes are available at https://10.45.3.2:9220/elasticsearch and https://10.45.3.1:9230/elasticsearch.

worker

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The number of workers per configured host publishing events to Elasticsearch. This is best used with load balancing mode enabled. Example: If you have 2 hosts and 3 workers, in total 6 workers are started (3 for each host).

host (DEPRECATED)

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The host of the Elasticsearch server. This option is deprecated because it is replaced by hosts.

port (DEPRECATED)

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The port of the Elasticsearch server. This option is deprecated because it is replaced by hosts.

username

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The basic authentication username for connecting to Elasticsearch.

password

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The basic authentication password for connecting to Elasticsearch.

protocol

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The name of the protocol Elasticsearch is reachable on. The options are: http or https. The default is http. However, if you specify a URL for hosts, the value of protocol is overridden by whatever scheme you specify in the URL.

path

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An HTTP path prefix that is prepended to the HTTP API calls. This is useful for the cases where Elasticsearch listens behind an HTTP reverse proxy that exports the API under a custom prefix.

proxy_url

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The URL of the proxy to use when connecting to the Elasticsearch servers. The value may be either a complete URL or a "host[:port]", in which case the "http" scheme is assumed. If a value is not specified through the configuration file then proxy environment variables are used. See the golang documentation for more information about the environment variables.

index

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The index root name to write events to. The default is the Beat name. For example "packetbeat" generates "[packetbeat-]YYYY.MM.DD" indexes (for example, "packetbeat-2015.04.26").

template

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The index template to use for setting mappings in Elasticsearch. By default, template loading is disabled. If you leave this option disabled, you must load the template by running the load script that is provided with Packetbeat.

If you enable the template config option, you can adjust the following settings to load your own template or overwrite an existing one:

name: The name of the template. The default is packetbeat.
path: The path to the template file.
overwrite: A boolean that specifies whether to overwrite the existing template. The default is false.

For example:

output:
  elasticsearch:
    hosts: ["localhost:9200"]
      name: "packetbeat"
      path: "packetbeat.template.json"
      overwrite: false

max_retries

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The number of times to retry publishing an event after a publishing failure. After the specified number of retries, the events are typically dropped. Some Beats, such as Filebeat, ignore the max_retries setting and retry until all events are published.

Set max_retries to a value less than 0 to retry until all events are published.

The default is 3.

bulk_max_size

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The maximum number of events to bulk in a single Elasticsearch bulk API index request. The default is 50.

If the Beat sends single events, the events are collected into batches. If the Beat publishes a large batch of events (larger than the value specified by bulk_max_size), the batch is split.

Specifying a larger batch size can improve performance by lowering the overhead of sending events. However big batch sizes can also increase processing times, which might result in API errors, killed connections, timed-out publishing requests, and, ultimately, lower throughput.

Setting bulk_max_size to values less than or equal to 0 disables buffering in libbeat. When buffering is disabled, Beats that publish single events (such as Packetbeat and Topbeat) send each event directly to Elasticsearch. Beats that publish data in batches (such as Filebeat) send events in batches based on the spooler size.

timeout

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The http request timeout in seconds for the Elasticsearch request. The default is 90.

flush_interval

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The number of seconds to wait for new events between two bulk API index requests. If bulk_max_size is reached before this interval expires, additional bulk index requests are made.

save_topology

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A Boolean that specifies whether the topology is kept in Elasticsearch. The default is false.

This option is relevant for Packetbeat only.

topology_expire

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The time to live in seconds for the topology information that is stored in Elasticsearch. The default is 15 seconds.

tls

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Configuration options for TLS parameters like the certificate authority to use for HTTPS-based connections. If the tls section is missing, the host CAs are used for HTTPS connections to Elasticsearch.

See TLS Options for more information.

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