Add rosetta support for Linux guest VMs. (#42)

This requires tart 0.3.5.

builder/tart/builder.go

@@ -27,6 +27,7 @@ type Config struct {
 	VMName                string              `mapstructure:"vm_name" required:"true"`
 	VMBaseName            string              `mapstructure:"vm_base_name" required:"true"`
 	Recovery              bool                `mapstructure:"recovery" required:"false"`
+	Rosetta               string              `mapstructure:"rosetta" required:"false"`
 	CpuCount              uint8               `mapstructure:"cpu_count" required:"false"`
 	MemoryGb              uint16              `mapstructure:"memory_gb" required:"false"`
 	Display               string              `mapstructure:"display" required:"false"`

builder/tart/step_create_linux_vm.go

@@ -20,7 +20,7 @@ func (s *stepCreateLinuxVM) Run(ctx context.Context, state multistep.StateBag) m
 	ui.Say("Creating virtual machine...")
 
 	createArguments := []string{
-		"create",  "--linux",
+		"create", "--linux",
 	}
 
 	if config.DiskSizeGb > 0 {
@@ -60,12 +60,15 @@ func (s *stepCreateLinuxVM) RunInstaller(ctx context.Context, state multistep.St
 	ui := state.Get("ui").(packersdk.Ui)
 
 	ui.Say("Starting the virtual machine for installation...")
-	runArgs := []string{"run", config.VMName, }
+	runArgs := []string{"run", config.VMName}
 	if config.Headless {
 		runArgs = append(runArgs, "--no-graphics")
 	} else {
 		runArgs = append(runArgs, "--graphics")
 	}
+	if config.Rosetta != "" {
+		runArgs = append(runArgs, fmt.Sprintf("--rosetta=%s", config.Rosetta))
+	}
 	if !config.DisableVNC {
 		runArgs = append(runArgs, "--vnc-experimental")
 	}

docs/builders/tart.mdx

@@ -45,6 +45,7 @@ Below we'll go through available options of this Packer plugin
 - `ssh_username` (string) - Username to use for the communication over SSH to run provision steps.
 - `ssh_password` (string) - Password to use for the communication over SSH to run provision steps.
 - `headless` (boolean) - Whether to show graphics interface of a VM. Useful for debugging `boot_command`.
+- `rosetta` (string) - Whether to enable Rosetta support of a Linux guest VM. Useful for running non arm64 programs in the guest VM. A common used value is `rosetta`. For further details and explanation run `tart run --help`
 - `boot_command` (array of strings) - This is an array of commands to type when the virtual machine is first booted. The goal of these commands should be to type just enough to initialize the operating system installer.
 
 ### Example Usage

example/install_rosetta.sh

@@ -0,0 +1,8 @@
+#!/bin/sh -x
+
+sudo mkdir /var/run/rosetta
+sudo mount -t virtiofs rosetta /var/run/rosetta
+sudo /usr/sbin/update-binfmts --install rosetta /var/run/rosetta/rosetta \
+    --magic "\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x3e\x00" \
+    --mask "\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff" \
+    --credentials yes --preserve no --fix-binary yes

example/ubuntu-22.04-rosetta.pkr.hcl

@@ -0,0 +1,34 @@
+packer {
+  required_plugins {
+    tart = {
+      version = ">= 0.6.2"
+      source  = "github.com/cirruslabs/tart"
+    }
+  }
+}
+
+source "tart-cli" "tart" {
+  vm_base_name        = "ubuntu-22.04-vanilla"
+  vm_name             = "ubuntu-22.04-rosetta"
+  headless            = true
+  disable_vnc         = true
+  rosetta             = "rosetta"
+  ssh_password        = "ubuntu"
+  ssh_username        = "ubuntu"
+  ssh_timeout         = "120s"
+}
+
+build {
+  sources = ["source.tart-cli.tart"]
+
+  provisioner "shell" {
+    inline = [
+      "sudo apt update && sudo apt-get install -y binfmt-support",
+    ]
+  }
+
+  provisioner "shell" {
+    script      = "install_rosetta.sh"
+    remote_path = "/tmp/install_rosetta.sh"
+  }
+}

version/version.go

@@ -6,7 +6,7 @@ import (
 
 var (
 	// Version is the main version number that is being run at the moment.
-	Version = "0.3.0"
+	Version = "0.6.2"
 
 	// VersionPrerelease is A pre-release marker for the Version. If this is ""
 	// (empty string) then it means that it is a final release. Otherwise, this