{
  "node-name": "node-b-f",
  "read-only": false,
  "driver": "qcow2",
  "encrypt": {
    "format": "luks",
    "key-secret": "node-b-f-encalias"
  },
  "file": "node-a-s",
  "backing": "node-b-f"
}
{
  "driver": "file",
  "filename": "/var/lib/libvirt/images/a",
  "node-name": "node-a-s",
  "auto-read-only": true,
  "discard": "unmap"
}
{
  "node-name": "node-b-f",
  "read-only": true,
  "driver": "qcow2",
  "encrypt": {
    "format": "luks",
    "key-secret": "node-b-f-encalias"
  },
  "file": "node-b-s",
  "backing": null
}
{
  "driver": "file",
  "filename": "/var/lib/libvirt/images/b",
  "node-name": "node-b-s",
  "auto-read-only": true,
  "discard": "unmap"
}