Autodiscover and metadata

Elastic Stack Beats
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2

That's a great point. Luckily this is possible. I've actually just created a pull request to better document adding those fields. You can interpolate any fields you like with the standard fields option, which is per-monitor.

For convenience I've included an example below. You may also want to set fields_under_root: true in your config if you'd prefer for those fields to be at the root level of your ES documents instead of the fields key.

heartbeat.autodiscover:
  providers:
    - type: docker
      templates:
        - condition:
            contains:
              docker.container.image: redis
          config:
            - type: tcp
              hosts: ["${data.host}:${data.port}"]
              schedule: "@every 1s"
              timeout: 1s
              fields:
                container_id: "${data.docker.container.id}"
                container_image: "${data.docker.container.image}"
                container_name: "${data.docker.container.name}"
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