---
title: Host fields
description: Info collected for the host machine. 
url: https://www.elastic.co/docs/reference/beats/heartbeat/exported-fields-host-processor
products:
  - Beats
  - Heartbeat
applies_to:
  - Elastic Cloud Serverless: Generally available
  - Elastic Stack: Generally available
---

# Host fields
Info collected for the host machine.
<definitions>
  <definition term="host.containerized">
    If the host is a container.
    type: boolean
  </definition>
  <definition term="host.os.build">
    OS build information.
    type: keyword
    example: 18D109
  </definition>
  <definition term="host.os.codename">
    OS codename, if any.
    type: keyword
    example: stretch
  </definition>
</definitions>