The image exporter outputs the build result into a container image format. The registry exporter is identical, but it automatically pushes the result by setting push=true.

Synopsis#

Build a container image using the image and registry exporters:

$ docker buildx build --output type=image[,parameters] .
$ docker buildx build --output type=registry[,parameters] .

The following table describes the available parameters that you can pass to --output for type=image:

Parameter	Type	Default	Description
name	String		Specify image name(s)
push	true,false	false	Push after creating the image.
push-by-digest	true,false	false	Push image without name.
registry.insecure	true,false	false	Allow pushing to insecure registry.
dangling-name-prefix	<value>		Name image with prefix@<digest>, used for anonymous images
name-canonical	true,false		Add additional canonical name name@<digest>
compression	uncompressed,gzip,estargz,zstd	gzip	Compression type, see compression
compression-level	0..22		Compression level, see compression
force-compression	true,false	false	Forcefully apply compression, see compression
oci-mediatypes	true,false	false	Use OCI media types in exporter manifests, see OCI Media types
unpack	true,false	false	Unpack image after creation (for use with containerd)
store	true,false	true	Store the result images to the worker's (for example, containerd) image store, and ensures that the image has all blobs in the content store. Ignored if the worker doesn't have image store (when using OCI workers, for example).
annotation.<key>	String		Attach an annotation with the respective key and value to the built image,see annotations

Annotations#

These exporters support adding OCI annotation using annotation parameter, followed by the annotation name using dot notation. The following example sets the org.opencontainers.image.title annotation:

$ docker buildx build \
    --output "type=<type>,name=<registry>/<image>,annotation.org.opencontainers.image.title=<title>" .

For more information about annotations, see BuildKit documentation.

Further reading#

For more information on the image or registry exporters, see the BuildKit README.