umoci-stat - Man Page

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

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.

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.

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).

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

umoci(1)

umoci(1), umoci-config(1), umoci-insert(1), umoci-list(1), umoci-repack(1).