---
title: microvm dockerfile
description: Print the Dockerfile stanza that wraps any base image with agentd
---

## 1. Synopsis

Print the Dockerfile stanza that wraps any base image with agentd

```sh
microvm dockerfile [options]
```

## 2. Parameters

| Parameter | Kind | Type | Required | Default | Choices | Help |
| --- | --- | --- | --- | --- | --- | --- |
| `--from` | flag | `string` | no | none | any | The image ref for the FROM line. Defaults to the managed al2023 base's pair |
| `--port` | flag | `string` | no | `9000` | any | The port agentd listens on inside the guest |
| `--workdir` | flag | `string` | no | none | any | A working directory to create and set. Strongly recommended |

The 3 global flags (`--json`, `--dense`, `--quiet`) are accepted here as on every command, and are left out of the table above for that reason; see [Global flags](/microvms-agentd/reference/#3-global-flags).

## 3. Response

On success stdout carries one envelope whose `type` is `microvm.dockerfile`. Its `data` object carries these keys: `stanza`, `baseImageName`, `baseImageDockerRef`, `port`, `workdir`.

[The envelope](/microvms-agentd/reference/envelope/) describes the fields around `data`. [Response types](/microvms-agentd/reference/response-types/) lists every `type` the CLI emits and which commands share each one.

## 4. Failures

A failure exits with one of the statuses on [Exit codes](/microvms-agentd/reference/exit-codes/) and writes the error shape on [The envelope](/microvms-agentd/reference/envelope/): a stable `code` to branch on, an `exitCode` that matches the process status, a human-readable `error`, and `suggestions`.

Where a failure is one this project has measured on the platform, the envelope's `finding` names the section of the platform notes that documents it. The exit-code table links each one.

## 5. Provenance

This page is generated from `docs/manifest.json`, the output of `microvm manifest`, which the CLI derives from its own argument tree. This page reads the `dockerfile` entry of `data.commands`. `site/scripts/gen-reference.mjs` writes it into the site's content directory on every `pnpm run sync`, so an edit made here is overwritten by the next run.

To change the page, change the source. Regenerate the source with `mise run manifest` from the repository root; `mise run manifest:check` fails when the committed file no longer matches what the binary emits.