> ## Documentation Index
> Fetch the complete documentation index at: https://docs.prefect.io/llms.txt
> Use this file to discover all available pages before exploring further.

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# steps

# `prefect_docker.deployments.steps`

Prefect deployment steps for building and pushing Docker images.

These steps can be used in a `prefect.yaml` file to define the default
build steps for a group of deployments, or they can be used to define
the build step for a specific deployment.

!!! example
Build a Docker image before deploying a flow:

```yaml  theme={null}
build:
    - prefect_docker.deployments.steps.build_docker_image:
        id: build-image
        requires: prefect-docker
        image_name: repo-name/image-name
        tag: dev

push:
    - prefect_docker.deployments.steps.push_docker_image:
        requires: prefect-docker
        image_name: "{{ build-image.image_name }}"
        tag: "{{ build-image.tag }}"
```

## Functions

### `cacheable` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-docker/prefect_docker/deployments/steps.py#L126" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python  theme={null}
cacheable(func: Callable[P, T]) -> Callable[P, T]
```

### `build_docker_image` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-docker/prefect_docker/deployments/steps.py#L147" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python  theme={null}
build_docker_image(image_name: str, dockerfile: str = 'Dockerfile', tag: str | None = None, additional_tags: list[str] | None = None, ignore_cache: bool = False, persist_dockerfile: bool = False, dockerfile_output_path: str = 'Dockerfile.generated', **build_kwargs: Any) -> BuildDockerImageResult
```

Builds a Docker image for a Prefect deployment.

Can be used within a `prefect.yaml` file to build a Docker
image prior to creating or updating a deployment.

**Args:**

* `image_name`: The name of the Docker image to build, including the registry and
  repository.
* `dockerfile`: The path to the Dockerfile used to build the image. If "auto" is
  passed, a temporary Dockerfile will be created to build the image.
* `tag`: The tag to apply to the built image.
* `additional_tags`: Additional tags on the image, in addition to `tag`, to apply to the built image.
* `persist_dockerfile`: If True and dockerfile="auto", the generated Dockerfile will be saved
  instead of deleted after the build.
* `dockerfile_output_path`: Optional path where the auto-generated Dockerfile should be saved
  (e.g., "Dockerfile.generated"). Only used if `persist_dockerfile` is True.
* `**build_kwargs`: Additional keyword arguments to pass to Docker when building
  the image. Available options can be found in the [`docker-py`](https://docker-py.readthedocs.io/en/stable/images.html#docker.models.images.ImageCollection.build)
  documentation.

Returns:
A dictionary containing the image name and tag of the
built image.
Example:
Build a Docker image prior to creating a deployment:

```yaml  theme={null}
build:
    - prefect_docker.deployments.steps.build_docker_image:
        requires: prefect-docker
        image_name: repo-name/image-name
        tag: dev
```

Build a Docker image with multiple tags:

```yaml  theme={null}
build:
    - prefect_docker.deployments.steps.build_docker_image:
        requires: prefect-docker
        image_name: repo-name/image-name
        tag: dev
        additional_tags:
            - v0.1.0,
            - dac9ccccedaa55a17916eef14f95cc7bdd3c8199
```

Build a Docker image using an auto-generated Dockerfile:

```yaml  theme={null}
build:
    - prefect_docker.deployments.steps.build_docker_image:
        requires: prefect-docker
        image_name: repo-name/image-name
        tag: dev
        dockerfile: auto
```

Build a Docker image for a different platform:

```yaml  theme={null}
build:
    - prefect_docker.deployments.steps.build_docker_image:
        requires: prefect-docker
        image_name: repo-name/image-name
        tag: dev
        dockerfile: Dockerfile
        platform: amd64
```

Save the auto-generated Dockerfile to disk:

```yaml  theme={null}
build:
  - prefect_docker.deployments.steps.build_docker_image:
      requires: prefect-docker
      image_name: repo-name/image-name
      tag: dev
      dockerfile: auto
      persist_dockerfile: true
      dockerfile_output_path: Dockerfile.generated
```

### `push_docker_image` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-docker/prefect_docker/deployments/steps.py#L335" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python  theme={null}
push_docker_image(image_name: str, tag: str | None = None, credentials: dict[str, Any] | None = None, additional_tags: list[str] | None = None, ignore_cache: bool = False) -> PushDockerImageResult
```

Push a Docker image to a remote registry.

**Args:**

* `image_name`: The name of the Docker image to push, including the registry and
  repository.
* `tag`: The tag of the Docker image to push.
* `credentials`: A dictionary containing the username, password, and URL for the
  registry to push the image to.
* `additional_tags`: Additional tags on the image, in addition to `tag`, to apply to the built image.

Returns:
A dictionary containing the image name and tag of the
pushed image.
Examples:
Build and push a Docker image to a private repository:

```yaml  theme={null}
build:
    - prefect_docker.deployments.steps.build_docker_image:
        id: build-image
        requires: prefect-docker
        image_name: repo-name/image-name
        tag: dev
        dockerfile: auto
push:
    - prefect_docker.deployments.steps.push_docker_image:
        requires: prefect-docker
        image_name: "{{ build-image.image_name }}"
        tag: "{{ build-image.tag }}"
        credentials: "{{ prefect.blocks.docker-registry-credentials.dev-registry }}"
```

Build and push a Docker image to a private repository with multiple tags

```yaml  theme={null}
build:
    - prefect_docker.deployments.steps.build_docker_image:
        id: build-image
        requires: prefect-docker
        image_name: repo-name/image-name
        tag: dev
        dockerfile: auto
        additional_tags: [
            v0.1.0,
            dac9ccccedaa55a17916eef14f95cc7bdd3c8199
        ]
push:
    - prefect_docker.deployments.steps.push_docker_image:
        requires: prefect-docker
        image_name: "{{ build-image.image_name }}"
        tag: "{{ build-image.tag }}"
        credentials: "{{ prefect.blocks.docker-registry-credentials.dev-registry }}"
        additional_tags: "{{ build-image.additional_tags }}"
```

## Classes

### `BuildDockerImageResult` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-docker/prefect_docker/deployments/steps.py#L82" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

The result of a `build_docker_image` step.

**Attributes:**

* `image_name`: The name of the built image.
* `tag`: The tag of the built image.
* `image`: The name and tag of the built image.
* `image_id`: The ID of the built image.
* `additional_tags`: The additional tags on the image, in addition to `tag`.

### `PushDockerImageResult` <sup><a href="https://github.com/PrefectHQ/prefect/blob/main/src/integrations/prefect-docker/prefect_docker/deployments/steps.py#L101" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

The result of a `push_docker_image` step.

**Attributes:**

* `image_name`: The name of the pushed image.
* `tag`: The tag of the pushed image.
* `image`: The name and tag of the pushed image.
* `additional_tags`: The additional tags on the image, in addition to `tag`.


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