A new parameter must be added to the `openshift-install agent create image` to create a tarfile of container images from the release image embedded in the installer. It is recommended that the new parameter flag be `--embed-release-image=true`.

When this is used the agent installer should use oc-mirror to mirror to a file using a command like:

oc-mirror --config ${config} file://${oc_mirror_dir} --ignore-history

where config contains the imageset which would be something like

apiVersion: mirror.openshift.io/v1alpha2
kind: ImageSetConfiguration
archiveSize: 20 
storageConfig:
  local:
    path: metadata
mirror:
  platform:
    architectures:
      - "amd64"
    channels:
      - name: candidate-${OPENSHIFT_RELEASE_STREAM}
        minVersion: $latest_release
        maxVersion: $latest_release
        type: ocp
  additionalImages:
  - name: registry.redhat.io/ubi8/ubi:latest