Generating filebeat custom fields

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I have an elasticsearch cluster (ELK) and some nodes sending logs to the logstash using filebeat. All the servers in my environment are CentOS 6.5.

The filebeat.yml file in each server is enforced by a Puppet module (both my production and test servers got the same configuration).

I want to have a field in each document which tells if it came from a production/test server.

I wanted to generate a dynamic custom field in every document which indicates the environment (production/test) using filebeat.yml file.

In order to work this out i thought of running a command which returns the environment (it is possible to know the environment throught facter) and add it under an "environment" custom field in the filebeat.yml file but I couldn't find any way of doing so.

Is it possible to run a command through filebeat.yml? Is there any other way to achieve my goal?

In your filebeat.yml:

filebeat:
  prospectors:
    -
      paths:
        - /path/to/my/folder
      input_type: log

      # Optional additional fields. These field can be freely picked
      # to add additional information to the crawled log files
      fields:
        mycustomvar: production

Generating filebeat dynamic custom fields - Beats, I have an elasticsearch cluster (ELK) and some nodes sending logs to the logstash using filebeat. All the servers in my environment are� Fields can be scalar values, arrays, dictionaries, or any nested combination of these. By default the fields that you specify will be grouped under the fields sub-dictionary in the event. To group the fields under a different sub-dictionary, use the target setting. To store the fields as top-level fields, set target: ''.

Yes, you can add fields to the document through filebeats.

The official doc shows you how.

Creating a New Filebeat Module, yml contains descriptions for the module-level fields. Please review and update the title and the descriptions in this file. The title is used as a title in the docs, so it's� Any template files that you add to the config/ folder need to generate a valid Filebeat input configuration in YAML format. The options accepted by the input configuration are documented in the Filebeat Inputs section of the Filebeat documentation. The template files use the templating language defined by the Go standard library.

in filebeat-7.2.0 i use next syntax:

processors:
- add_fields:
    target: ''
    fields:
      mycustomfieldname: customfieldvalue

note: target = '' means that mycustomfieldname is a top-level field official 7.2 docs

A Filebeat Tutorial: Getting Started with the Lightweight Shipper , This Filebeat tutorial shows users to install, configure & ship logs. of the logging agent—installed on the machine generating the log files, tailing them, the file; excluding and including specific lines; or adding custom fields. Filebeat Reference [7.9] » Configure Filebeat » Filter and enhance data with processors » Keep fields from events « Generate a fingerprint of an event Registered Domain » Keep fields from events edit

Adding A Custom GeoIP Field to Filebeat And ElasticSearch, Adding a custom field in filebeat that is geocoded to a geoip field in ElasticSearch on ELK so that it Or generate a new one from fields.yml. The filebeat.yml file in each server is enforced by a Puppet module (both my production and test servers got the same configuration). I want to have a field in each document which tells if it came from a production/test server. I wanted to generate a dynamic custom field in every document which indicates the environment (production/test) using

Define field type with add_fields processor in filebeat.yml?, Looking at documentation on adding fields, I see that filebeat can add any custom field by name and value that Path to fields.yml file to generate the template. Rule fields are used to capture the specifics of any observer or agent rules that generate alerts or other notable events. Examples of data sources that would populate the rule fields include: network admission control platforms, network or host IDS/IPS, network firewalls, web application firewalls, url filters, endpoint detection and response

fields_under_rootedit. If this option is set to true, the custom fields are stored as top-level fields in the output document instead of being grouped under a fields sub-dictionary. If the custom field names conflict with other field names added by Filebeat, then the custom fields overwrite the other fields. processorsedit

Comments
  • Thanks for the fast reply but what I need is a dynamic field that will specify the server's environment. I know I can add a custom field but I need it to be a command. The reason I don't want to do it manually like you suggested is that I have many servers and I don't want to create a different file for each and everyone of them. Thanks anyway!!
  • Put the variable in there from your configuration management system when you deploy the filebeat config to the server.
  • I guess I will do that, I wanted to know if there is another option. Thanks a lot :)
  • Is it possible to assign a field type to the custom fields here as well? For example, can you make "mycustomfieldname" a "text" or "keyword" type in this file alone?
  • Documentation has nothing about this. Type you can specify by mapping in elasticsearch.