Supported formats

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Container images

Artifact Registry supports the following container image formats:

Docker V2

Docker V2 image manifest is a specification for container images that allows multi-architecture images and supports content-addressable images.

Docker V2 images supersede Docker V1 images, which are deprecated.

OCI Image Format

The OCI image format is a specification for container images based on the Docker Image Manifest Version 2, Schema 2 format. Artifact Registry implements the OCI Specification, an API protocol to help standardize distribution of content.

You can store artifacts that support the OCI image format in Artifact Registry Docker repositories. For example:

  • Helm 3 charts can be packaged in OCI format. For more information, see the Artifact Registry Helm overview.
  • Singularity supports pulling Docker and OCI images from private registries and pushing and pulling images in Singularity Image File (SIF) format with private registries.

    • Authentication is similar to authentication for Docker clients. Singularity can read settings that the credential helper added to the Docker client config.json. If you are using a token or service account key for password authentication, you can use the singularity remote login command to log in with your credentials.
    • Use the singularity pull command with the oras:// URI to pull images.
    • Use the singularity push command with the oras:// URI to push images.

    For example, the following command pulls my-app:latest from the repository us-west1.pkg.dev/my-project/sif-repo.

    singularity pull oras://us-west1.pkg.dev/my-project/sif-repo/my-app:latest`
    

Manifest lists and image indexes

Manifest lists are part of the Docker V2, Schema 2 and OCI images.

Manifest lists allow a single digest or tag to represent multiple forms of an image.

Image indexes are the equivalent of manifest lists in OCI images.

Like manifest lists, an image index manifest refers to multiple image manifests. Image indexes are useful for multi-platform images.

Package formats

The following package types are available:

Other formats

You can store Kubeflow pipeline templates in a Kubeflow Pipelines repository in Artifact Registry. A pipeline template lets you reuse ML workflow definitions when you're managing ML workflows in Vertex AI.

Private preview formats

Private preview features are only available to users who signed up for Artifact Registry private preview access. For more information, contact your Google representative.