KnownRefMetadataKeys are the subset of exporter keys that can be suffixed by a platform to become platform specific.

Compression level Value: int (0-9) for gzip and estargz Value: int (0-22) for zstd.

Fallback image name prefix if image name isn't provided.

Force compression on all (including existing) layers.

Force attestation to be attached.

Allow pushing to insecure HTTP registry.

Compression type for newly created and cached layers.

Name of the image.

Creates additional image name with format <name>@<digest> Value: bool <true|false>.

Use OCI artifact format for the attestation manifest.

Use OCI mediatypes instead of Docker in JSON configs.

Mark layers as non-distributable if they are found to use a non-distributable media type.

Push after creating image.

Push unnamed image.

Rewrite timestamps in layers to match SOURCE_DATE_EPOCH Value: bool <true|false>.

Clamp produced timestamps.

Store the resulting image along with all of the content it references.

Unpack image after it's created (containerd).