umoci-stat(1)(#)

Aleksa Sarai OCTOBER 2025

NAME
umoci stat - Display status information about an image tag

SYNOPSIS
umoci stat --image=image[:tag] [--json]

DESCRIPTION
Generates various pieces of status information about an image tag, including the history of the image.

WARNING: Do not depend on the output of this tool. Previously we recommended the use of --json as the "stable" interface but this interface will be reworked in future.

OPTIONS
The global options are defined in umoci(1).

--image=image[:tag]
  The OCI image tag to display information about. image must be a path to a
  valid OCI image and tag must be a valid tag in the image. If tag is not
  provided it defaults to "latest".

--json
  Output the status information as a JSON encoded blob.

FORMAT
The format of the --json blob is as follows. Many of these fields come from the OCI image specification ⟨https://github.com/opencontainers/image-spec⟩.
    {
      # This is the manifest blob of the image.
      "manifest": {
        "descriptor": <descriptor of manifest blob>,
        "blob": <raw manifest blob>
      },
      # This is the configuration blob of the image.
      "config": {
        "descriptor": <descriptor of config blob>,
        "blob": <raw config blob>
      },
      # This is the set of history entries for the image.
      "history": [
        {
          "layer":       <descriptor>, # null if empty_layer is true
          "diff_id":     <diffid>,
          "created":     <created>,
          "created_by":  <created_by>,
          "author":      <author>,
          "empty_layer": <empty_layer>
        }...
      ]
    }

In future versions of umoci(1) there may be extra fields added to the above structure. However, the currently defined fields will always be set (until a backwards-incompatible release is made).

EXAMPLE
The following gets information about an image downloaded from a docker(1) registry using skopeo(1).
    % skopeo copy docker://registry.opensuse.org/opensuse/tumbleweed:latest oci:image:latest
    % umoci stat --image image
    == MANIFEST ==
    Schema Version: 2
    Media Type: application/vnd.oci.image.manifest.v1+json
    Config:
            Descriptor:
                    Media Type: application/vnd.oci.image.config.v1+json
                    Digest: sha256:d06b5a49f4d4b8f5f39c1a6d798c7b2b1611747d5a1ee3bcfb5dc48d1b52f1e1
                    Size: 2.175kB
    Layers:
            Descriptor:
                    Media Type: application/vnd.oci.image.layer.v1.tar+gzip
                    Digest: sha256:34198bffb2664ac16017024a9f8e3e29e73efd98137894d033d41e308728ae56
                    Size: 38.82MB
    Descriptor:
            Media Type: application/vnd.oci.image.manifest.v1+json
            Digest: sha256:cc559b926ba5cccd0d95058279dd0120588576c64ba6667f2221bc554b9f0621
            Size: 407B
            Annotations:
                    org.opencontainers.image.ref.name: latest
    == CONFIG ==
    Created: 2025-10-14T07:39:53Z
    Author: "Fabian Vogt <fvogt@suse.com>"
    Platform:
            OS: linux
            Architecture: amd64
    Image Config:
            User: ""
            Command:
                    /bin/bash
            Labels:
                    org.openbuildservice.disturl: obs://build.opensuse.org/openSUSE:Factory/images/06574e385a3d2455c90f69f65ffa3e80-opensuse-tumbleweed-image:docker
                    org.opencontainers.image.created: 2025-10-14T07:39:47.127067859Z
                    org.opencontainers.image.description: "Image containing a minimal environment for containers based on openSUSE Tumbleweed."
                    org.opencontainers.image.source: https://build.opensuse.org/package/show/openSUSE:Factory/opensuse-tumbleweed-image?rev=06574e385a3d2455c90f69f65ffa3e80
                    org.opencontainers.image.title: "openSUSE Tumbleweed Base Container"
                    org.opencontainers.image.url: https://www.opensuse.org
                    org.opencontainers.image.vendor: "openSUSE Project"
                    org.opencontainers.image.version: 20251013.34.298
                    org.opensuse.base.created: 2025-10-14T07:39:47.127067859Z
                    org.opensuse.base.description: "Image containing a minimal environment for containers based on openSUSE Tumbleweed."
                    org.opensuse.base.disturl: obs://build.opensuse.org/openSUSE:Factory/images/06574e385a3d2455c90f69f65ffa3e80-opensuse-tumbleweed-image:docker
                    org.opensuse.base.lifecycle-url: https://en.opensuse.org/Lifetime
                    org.opensuse.base.reference: registry.opensuse.org/opensuse/tumbleweed:20251013.34.298
                    org.opensuse.base.source: https://build.opensuse.org/package/show/openSUSE:Factory/opensuse-tumbleweed-image?rev=06574e385a3d2455c90f69f65ffa3e80
                    org.opensuse.base.title: "openSUSE Tumbleweed Base Container"
                    org.opensuse.base.url: https://www.opensuse.org
                    org.opensuse.base.vendor: "openSUSE Project"
                    org.opensuse.base.version: 20251013.34.298
                    org.opensuse.lifecycle-url: https://en.opensuse.org/Lifetime
                    org.opensuse.reference: registry.opensuse.org/opensuse/tumbleweed:20251013.34.298
    Descriptor:
            Media Type: application/vnd.oci.image.config.v1+json
            Digest: sha256:d06b5a49f4d4b8f5f39c1a6d798c7b2b1611747d5a1ee3bcfb5dc48d1b52f1e1
            Size: 2.175kB
    == HISTORY ==
    LAYER                                                                   CREATED              CREATED BY   SIZE    COMMENT
    sha256:34198bffb2664ac16017024a9f8e3e29e73efd98137894d033d41e308728ae56 2025-10-14T07:39:53Z KIWI 10.2.32 38.82MB openSUSE Tumbleweed 20251013 Base Container

SEE ALSO
umoci(1)