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Caution

Grafana Alloy is the new name for our distribution of the OTel collector. Grafana Agent has been deprecated and is in Long-Term Support (LTS) through October 31, 2025. Grafana Agent will reach an End-of-Life (EOL) on November 1, 2025. Read more about why we recommend migrating to Grafana Alloy.

Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.

Open source

export block

export is an optional configuration block used to specify an emitted value of a custom component. export blocks must be given a label which determine the name of the export.

The export block may only be specified inside the definition of a declare block.

Note

In classic modules, the export block is valid as a top-level block in a classic module. Classic modules are deprecated and scheduled to be removed in the release after v0.40.

Example

river
export "ARGUMENT_NAME" {
  value = ARGUMENT_VALUE
}

Arguments

The following arguments are supported:

NameTypeDescriptionDefaultRequired
valueanyValue to export.yes

The value argument determines what the value of the export will be. To expose an exported field of another component, set value to an expression that references that exported value.

Exported fields

The export block doesn’t export any fields.

Example

This example creates a custom component where the output of discovering Kubernetes pods and nodes are exposed to the user:

river
declare "pods_and_nodes" {
  discovery.kubernetes "pods" {
    role = "pod"
  }

  discovery.kubernetes "nodes" {
    role = "nodes"
  }

  export "kubernetes_resources" {
    value = concat(
      discovery.kubernetes.pods.targets,
      discovery.kubernetes.nodes.targets,
    )
  }
}