Docker.app Packer Example

docker-extract.json

{
  "builders": [
    {
      "type": "docker",
      "image": "ubuntu",
      "discard": true
    }
  ],
  "provisioners": [
    {
      "type": "file",
      "source": "cake.txt",
      "destination": "/chocolate-cake",
      "direction": "upload"
    },
    {
      "type": "shell",
      "inline": [
        "tar -czf /cake.tar.gz /chocolate-cake"
      ]
    },
    {
      "type": "file",
      "source": "/cake.tar.gz",
      "destination": "cake.tar.gz",
      "direction": "download"
    }
  ],
  "post-processors": [
    {
      "type":"artifice",
      "files":"cake.tar.gz"
    }
  ]
}