packer-artifice.json

{
  "variables": {
    "gce_from":    "debian-9",
    "gce_zone":    "europe-west4-c",
    "gce_project": "{{env `GOOGLE_PROJECT`}}",
    "gce_auth":    "{{env `GOOGLE_CREDENTIALS`}}",
    "gce_machine": "custom-1-1024",
    "gce_user":    "cloud"
  },
  "builders": [
    {
      "name":                "gce",
      "type":                "googlecompute",
      "disk_type":           "pd-ssd",
      "project_id":          "{{user `gce_project`}}",
      "account_file":        "{{user `gce_auth`}}",
      "ssh_username":        "{{user `gce_user`}}",
      "machine_type":        "{{user `gce_machine`}}",
      "source_image_family": "{{user `gce_from`}}",
      "zone":                "{{user `gce_zone`}}",
      "image_name":          "{{user `from`}}"
    }
  ],
  "provisioners": [
    {
      "type": "file",
      "source": "/usr/bin/packer",
      "destination": "/tmp/packer"
    },
    {
      "type": "file",
      "source": "container",
      "destination": "/tmp"
    },
    {
      "type": "shell",
      "execute_command": "echo 'packer' | sudo -S bash -c '{{ .Vars }} {{ .Path }}'",
      "inline": [
        "apt-get -qq install -y apt-transport-https",
        "curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add -",
        "echo 'deb [arch=amd64] http://download.docker.com/linux/debian stretch stable' | tee /etc/apt/sources.list.d/docker.list",
	"apt-get update",
	"apt-get -qq install -y docker-ce",
        "cd /tmp/container",
        "/tmp/packer build container-packer.json"
      ]
    },
    {
      "type": "file",
      "source": "/tmp/container/alpine.tar",
      "destination": "alpine.tar",
      "direction": "download"
    }
  ],
  "post-processors": [
    [
      {
        "type": "artifice",
        "files": ["alpine.tar"]
      },
      {
        "type": "compress",
        "output": "alpine.tar.gz"
      },
      {
        "type": "shell-local",
        "inline": [ "du -sh alpine.tar.gz"]
      }
    ]
  ]
}