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Documentation Grafana Agent Flow mode Reference Components discovery.dns

discovery.dns

discovery.dns discovers scrape targets from DNS records.

Usage

Alloy Copy

discovery.dns "LABEL" {
  names = ["lookup.example.com"]
}

Arguments

The following arguments are supported:

Exported fields

The following field is exported and can be referenced by other components:

Each target includes the following labels:

• __meta_dns_name: Name of the record that produced the discovered target.
• __meta_dns_srv_record_target: Target field of the SRV record.
• __meta_dns_srv_record_port: Port field of the SRV record.
• __meta_dns_mx_record_target: Target field of the MX record.

Component health

discovery.dns is only reported as unhealthy when given an invalid configuration. In those cases, exported fields retain their last healthy values.

Debug information

discovery.dns does not expose any component-specific debug information.

Debug metrics

discovery.dns does not expose any component-specific debug metrics.

Examples

This example discovers targets from an A record.

Alloy Copy

discovery.dns "dns_lookup" {
  names = ["myservice.example.com", "myotherservice.example.com"]
  type = "A"
  port = 8080
}