OCI Image Spec

Since version 0.8, hyperd supported OCI Image. You may save your images to OCI image format with save command, and load OCI Image with load command.

Here is a simple example:

# hyperctl images
REPOSITORY          TAG                 IMAGE ID     
busybox            latest                7968321274dc    
centos              7                   980e0e4c79ec  

//save centos:7 image as refname "hello" and busybox:latest image as refname "world" in mix-oci.tar usging oci image format
# hyperctl save -o /tmp/mix-oci.tar -f oci -r centos:7=hello -r busybox:latest=world centos:7 busybox:latest

// untar mix-oci.tar and find index.json file
# cat index.json |jq
{
  "schemaVersion": 2,
  "manifests": [
    {
      "mediaType": "application/vnd.oci.image.manifest.v1+json",
      "digest": "sha256:351c1c2957c21a76d7b74e94afabd6429d4a3d16cbe6ee7e7b1f351e39125490",
      "size": 346,
      "annotations": {
        "org.opencontainers.ref.name": "hello"
      },
      "platform": {
        "architecture": "amd64",
        "os": "linux"
      }
    },
    {
      "mediaType": "application/vnd.oci.image.manifest.v1+json",
      "digest": "sha256:87fe700a194b98ab383582f9981539d9a69d49e1143e91fe0e75c4a92f5de42e",
      "size": 344,
      "annotations": {
        "org.opencontainers.ref.name": "world"
      },
      "platform": {
        "architecture": "amd64",
        "os": "linux"
      }
    }
  ]
}

// rm centos:7 and busybox:latest images for loading them from mix-oci.tar
# hyperctl rmi centos:7 busybox:latest

// load centos and busybox images from mix-oci.tar and retag them as centos:test and busybox:test
# hyperctl load -i /tmp/oci/mix-oci.tar -r centos:7=hello -r busybox:test=world

# hyperctl images
REPOSITORY          TAG                 IMAGE ID     
busybox           test                7968321274dc    
centos              test                   980e0e4c79ec