---
title: "export block | Grafana Agent documentation"
description: "Learn about the export configuration block"
---

# export block

`export` is an optional configuration block used to specify an emitted value of a [custom component](/docs/agent/v0.43/flow/concepts/custom_components/). `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](/docs/agent/v0.43/flow/reference/config-blocks/declare/).

> Note
> 
> In [classic modules](/docs/agent/v0.43/flow/concepts/modules/#classic-modules-deprecated), 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

Alloy ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```alloy
export "ARGUMENT_NAME" {
  value = ARGUMENT_VALUE
}
```

## Arguments

The following arguments are supported:

Expand table

| Name    | Type  | Description      | Default | Required |
|---------|-------|------------------|---------|----------|
| `value` | `any` | Value to export. |         | yes      |

The `value` argument determines what the value of the export is. 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:

Alloy ![Copy code to clipboard](/media/images/icons/icon-copy-small-2.svg) Copy

```alloy
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,
    )
  }
}
```