gistfile1.txt

```
{
  "variables": {
    "build_target" : "foo-current",
    "build_patch": "2019.01",
    "default_ssh_user" : "root",
    "default_password": null
  },
  "builders": [
    {
      "name": "gcp",
      "type": "qemu",
          "boot_wait": "3s",
          "disk_image": "true",
          "iso_url": "foo.raw",
          "iso_checksum_type": "none",
          "accelerator": "kvm",
          "vm_name": "{{user `build_target` }}-{{user  `build_patch` }}.raw",
          "machine_type": "pc",
          "disk_interface": "virtio",
          "disk_compression": "true",
          "format": "raw",
          "net_device": "virtio-net-pci",
          "ssh_username": "{{user `default_ssh_user`}}",
          "ssh_password": "{{user `default_password`}}",
          "headless": "false",
          "boot_command": "<tab><wait> e <wait><down><wait> e <wait><wait><wait> cc: url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/allowlogin.cfg <enter> b",
          "http_directory": "configs",
          "disk_size": "32768",
          "qemuargs": [
                  ["-m", "2048"],
                  ["-k", "en-us"]
          ],
          "shutdown_command": "shutdown -P now",
          "shutdown_timeout": "10m",
          "output_directory": "build-{{build_name}}-{{user `build_target`}}"
    }
  ],
  "provisioners": [
    {
      "type": "file",
      "only" : [
        "gcp"
      ],
      "source": "/tmp/foo/",
      "destination": "/tmp",
      "direction": "upload"
    }
  ],
  "post-processors": [
    {
      "type": "shell-local",
      "only": [
        "gcp"
      ],
      "inline": [ "virt-sysprep --enable net-hostname,net-hwaddr,udev-persistent-net,logfiles,tmp-files,package-manager-cache,rpm-db  -a build-{{build_name}}-{{user `build_target`}}/{{user `build_target` }}-{{user `build_patch`}}.raw" ]
    }
  ]
}
```

debug output:
```
2019/01/31 14:09:05 packer-1.3.4: 2019/01/31 14:09:05 [INFO] Waiting for SSH, up to timeout: 5m0s
==> gcp: Using ssh communicator to connect: 127.0.0.1
==> gcp: Waiting for SSH to become available...
2019/01/31 14:09:05 packer-1.3.4: 2019/01/31 14:09:05 [INFO] Attempting SSH connection...
2019/01/31 14:09:05 packer-1.3.4: 2019/01/31 14:09:05 [DEBUG] reconnecting to TCP connection for SSH
2019/01/31 14:09:05 packer-1.3.4: 2019/01/31 14:09:05 [DEBUG] handshaking with SSH
2019/01/31 14:09:23 packer-1.3.4: 2019/01/31 14:09:23 [DEBUG] SSH handshake err: ssh: handshake failed: read tcp 127.0.0.1:33578->127.0.0.1:3977: read: connection reset by peer
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [INFO] Attempting SSH connection...
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] reconnecting to TCP connection for SSH
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] handshaking with SSH
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] handshake complete!
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] Opening new ssh session
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [INFO] agent forwarding enabled
==> gcp: Connected to SSH!
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 Running the provision hook
2019/01/31 14:09:30 [INFO] (telemetry) Starting provisioner file
==> gcp: Uploading /tmp/foo/ => /tmp
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] Upload dir '/tmp/foo/' to '/tmp'
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] Opening new ssh session
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] Starting remote scp process:  scp -rvt /tmp
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] Started SCP session, beginning transfers...
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] scp: Uploading bar: perms=C0644 size=0
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] SCP session complete, closing stdin pipe.
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] Waiting for SSH session to complete.
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] scp stderr (length 18): Sink: C0644 0 bar
2019/01/31 14:09:30 [INFO] (telemetry) ending file
==> gcp: Gracefully halting virtual machine...
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 Executing shutdown command: shutdown -P now
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] Opening new ssh session
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 [DEBUG] starting remote command: shutdown -P now
2019/01/31 14:09:30 packer-1.3.4: 2019/01/31 14:09:30 Waiting max 10m0s for shutdown to complete
2019/01/31 14:09:38 packer-1.3.4: 2019/01/31 14:09:38 VM shut down.
2019/01/31 14:09:38 [INFO] (telemetry) ending qemu
2019/01/31 14:09:38 Builds completed. Waiting on interrupt barrier...
==> Builds finished. The artifacts of successful builds are:
2019/01/31 14:09:38 machine readable: gcp,artifact-count []string{"1"}
Build 'gcp' finished.

==> Builds finished. The artifacts of successful builds are:
2019/01/31 14:09:38 machine readable: gcp,artifact []string{"0", "builder-id", "transcend.qemu"}
2019/01/31 14:09:38 machine readable: gcp,artifact []string{"0", "id", "VM"}
2019/01/31 14:09:38 machine readable: gcp,artifact []string{"0", "string", "VM files in directory: build-gcp-foo-current"}
2019/01/31 14:09:38 machine readable: gcp,artifact []string{"0", "files-count", "1"}
2019/01/31 14:09:38 machine readable: gcp,artifact []string{"0", "file", "0", "build-gcp-foo-current/foo-current-2019.0107.raw"}
2019/01/31 14:09:38 machine readable: gcp,artifact []string{"0", "end"}
2019/01/31 14:09:38 [INFO] (telemetry) Finalizing.
--> gcp: VM files in directory: build-gcp-foo-current
2019/01/31 14:09:39 waiting for all plugin processes to complete...
2019/01/31 14:09:39 /usr/local/bin/packer-1.3.4: plugin process exited
2019/01/31 14:09:39 /usr/local/bin/packer-1.3.4: plugin process exited
```