Image and registry exporters

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.


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
buildinfo true,false true Attach inline build info
buildinfo-attrs true,false false Attach inline build info attributes
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


These exporters support adding OCI annotation using annotation.* dot notation parameter. The following example sets the org.opencontainers.image.title annotation for a build:

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

For more information about annotations, see BuildKit documentation.

Further reading

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