org.osbuild.skopeo

Fetch container image from a registry using skopeo

The image is stored in a directory called image under a directory indexed by the "container image id", which is the digest of the container configuration file (rather than the outer manifest) and is what will be shown in the "podman images" output when the image is installed. This digest is stable as opposed to the manifest digest which can change during transfer and storage due to e.g. recompression.

The local storage format for containers is the dir format which supports retaining signatures and manifests.

Buildhost commands used: skopeo.

Schema 1

{
  "additionalProperties": false,
  "definitions": {
    "item": {
      "description": "The container image to fetch indexed by the container image id",
      "type": "object",
      "additionalProperties": false,
      "patternProperties": {
        "sha256:[0-9a-f]{64}": {
          "type": "object",
          "additionalProperties": false,
          "required": [
            "image"
          ],
          "properties": {
            "image": {
              "type": "object",
              "additionalProperties": false,
              "required": [
                "name",
                "digest"
              ],
              "properties": {
                "name": {
                  "type": "string",
                  "description": "Name of the image (including registry)."
                },
                "digest": {
                  "type": "string",
                  "description": "Digest of image in registry.",
                  "pattern": "sha256:[0-9a-f]{64}"
                },
                "tls-verify": {
                  "type": "boolean",
                  "description": "Require https (default true)."
                },
                "containers-transport": {
                  "type": "string",
                  "enum": [
                    "docker",
                    "containers-storage"
                  ],
                  "description": "The containers transport from which to copy the container",
                  "default": "docker"
                },
                "storage-location": {
                  "type": "string",
                  "description": "The location of the local containers storage"
                }
              }
            }
          }
        }
      }
    }
  },
  "properties": {
    "items": {
      "$ref": "#/definitions/item"
    },
    "digests": {
      "$ref": "#/definitions/item"
    }
  },
  "oneOf": [
    {
      "required": [
        "items"
      ]
    },
    {
      "required": [
        "digests"
      ]
    }
  ]
}

Schema 2

{}