luks: implements support for Alpine

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>

cmd/d2vm/build.go

@@ -79,6 +79,10 @@ var (
 				}
 				return docker.RunD2VM(cmd.Context(), d2vm.Image, d2vm.Version, in, out, cmd.Name(), os.Args[2:]...)
 			}
+			if luksPassword != "" && !splitBoot {
+				logrus.Warnf("luks password is set: enabling split boot")
+				splitBoot = true
+			}
 			size, err := parseSize(size)
 			if err != nil {
 				return err
@@ -109,6 +113,7 @@ var (
 				d2vm.WithRaw(raw),
 				d2vm.WithSplitBoot(splitBoot),
 				d2vm.WithBootSize(bootSize),
+				d2vm.WithLuksPassword(luksPassword),
 			); err != nil {
 				return err
 			}

cmd/d2vm/convert.go

@@ -51,6 +51,10 @@ var (
 				}
 				return docker.RunD2VM(cmd.Context(), d2vm.Image, d2vm.Version, out, out, cmd.Name(), dargs...)
 			}
+			if luksPassword != "" && !splitBoot {
+				logrus.Warnf("luks password is set: enabling split boot")
+				splitBoot = true
+			}
 			img := args[0]
 			tag := "latest"
 			if parts := strings.Split(img, ":"); len(parts) > 1 {
@@ -97,6 +101,7 @@ var (
 				d2vm.WithRaw(raw),
 				d2vm.WithSplitBoot(splitBoot),
 				d2vm.WithBootSize(bootSize),
+				d2vm.WithLuksPassword(luksPassword),
 			); err != nil {
 				return err
 			}

cmd/d2vm/flags.go

@@ -35,6 +35,7 @@ var (
 	networkManager   string
 	splitBoot        bool
 	bootSize         uint64
+	luksPassword     string
 )
 
 func buildFlags() *pflag.FlagSet {
@@ -50,5 +51,6 @@ func buildFlags() *pflag.FlagSet {
 	flags.BoolVar(&push, "push", false, "Push the container disk image to the registry")
 	flags.BoolVar(&splitBoot, "split-boot", false, "Split the boot partition from the root partition")
 	flags.Uint64Var(&bootSize, "boot-size", 100, "Size of the boot partition in MB")
+	flags.StringVar(&luksPassword, "luks-password", "", "Password to use for the LUKS encrypted root partition. If not set, the root partition will not be encrypted")
 	return flags
 }