run: fix qemu-img convert path typo

build & convert: add kubevirt container disk support

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

cmd/d2vm/build.go

@@ -32,7 +32,6 @@ import (
 var (
 	file      = "Dockerfile"
 	tag       = "d2vm-" + uuid.New().String()
-	networkManager string
 	buildArgs []string
 	buildCmd  = &cobra.Command{
 		Use:   "build [context directory]",
@@ -87,6 +86,9 @@ var (
 			if file == "" {
 				file = filepath.Join(args[0], "Dockerfile")
 			}
+			if push && tag == "" {
+				return fmt.Errorf("tag is required when pushing container disk image")
+			}
 			if _, err := os.Stat(output); err == nil || !os.IsNotExist(err) {
 				if !force {
 					return fmt.Errorf("%s already exists", output)
@@ -108,11 +110,12 @@ var (
 			); err != nil {
 				return err
 			}
-			uid, ok := sudoUser()
+			if uid, ok := sudoUser(); ok {
-			if !ok {
+				if err := os.Chown(output, uid, uid); err != nil {
-				return nil
+					return err
 				}
-			return os.Chown(output, uid, uid)
+			}
+			return maybeMakeContainerDisk(cmd.Context())
 		},
 	}
 )
@@ -123,11 +126,5 @@ func init() {
 	buildCmd.Flags().StringVarP(&file, "file", "f", "", "Name of the Dockerfile")
 	buildCmd.Flags().StringArrayVar(&buildArgs, "build-arg", nil, "Set build-time variables")
 
-	buildCmd.Flags().StringVarP(&output, "output", "o", output, "The output image, the extension determine the image format, raw will be used if none. Supported formats: "+strings.Join(d2vm.OutputFormats(), " "))
+	buildCmd.Flags().AddFlagSet(buildFlags())
-	buildCmd.Flags().StringVarP(&password, "password", "p", "", "Optional root user password")
-	buildCmd.Flags().StringVarP(&size, "size", "s", "10G", "The output image size")
-	buildCmd.Flags().BoolVar(&force, "force", false, "Override output image")
-	buildCmd.Flags().StringVar(&cmdLineExtra, "append-to-cmdline", "", "Extra kernel cmdline arguments to append to the generated one")
-	buildCmd.Flags().StringVar(&networkManager, "network-manager", "", "Network manager to use for the image: none, netplan, ifupdown")
-	buildCmd.Flags().BoolVar(&raw, "raw", false, "Just convert the container to virtual machine image without installing anything more")
 }

cmd/d2vm/container_disk.go

@@ -0,0 +1,43 @@
+// Copyright 2022 Linka Cloud  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/sirupsen/logrus"
+
+	"go.linka.cloud/d2vm"
+	"go.linka.cloud/d2vm/pkg/docker"
+)
+
+func maybeMakeContainerDisk(ctx context.Context) error {
+	if containerDiskTag == "" {
+		return nil
+	}
+	logrus.Infof("creating container disk image %s", containerDiskTag)
+	if err := d2vm.MakeContainerDisk(ctx, output, containerDiskTag); err != nil {
+		return err
+	}
+	if !push {
+		return nil
+	}
+	logrus.Infof("pushing container disk image %s", containerDiskTag)
+	if err := docker.Push(ctx, containerDiskTag); err != nil {
+		return fmt.Errorf("failed to push container disk: %w", err)
+	}
+	return nil
+}

cmd/d2vm/convert.go

@@ -30,10 +30,6 @@ import (
 )
 
 var (
-	raw          bool
-	pull         = false
-	cmdLineExtra = ""
-
 	convertCmd = &cobra.Command{
 		Use:          "convert [docker image]",
 		Short:        "Convert Docker image to vm image",
@@ -65,6 +61,9 @@ var (
 			if err != nil {
 				return err
 			}
+			if push && tag == "" {
+				return fmt.Errorf("tag is required when pushing container disk image")
+			}
 			if _, err := os.Stat(output); err == nil || !os.IsNotExist(err) {
 				if !force {
 					return fmt.Errorf("%s already exists", output)
@@ -100,11 +99,12 @@ var (
 				return err
 			}
 			// set user permissions on the output file if the command was run with sudo
-			uid, ok := sudoUser()
+			if uid, ok := sudoUser(); ok {
-			if !ok {
+				if err := os.Chown(output, uid, uid); err != nil {
-				return nil
+					return err
 				}
-			return os.Chown(output, uid, uid)
+			}
+			return maybeMakeContainerDisk(cmd.Context())
 		},
 	}
 )
@@ -119,12 +119,6 @@ func parseSize(s string) (int64, error) {
 
 func init() {
 	convertCmd.Flags().BoolVar(&pull, "pull", false, "Always pull docker image")
-	convertCmd.Flags().StringVarP(&output, "output", "o", output, "The output image, the extension determine the image format, raw will be used if none. Supported formats: "+strings.Join(d2vm.OutputFormats(), " "))
+	convertCmd.Flags().AddFlagSet(buildFlags())
-	convertCmd.Flags().StringVarP(&password, "password", "p", "", "Optional root user password")
-	convertCmd.Flags().StringVarP(&size, "size", "s", "10G", "The output image size")
-	convertCmd.Flags().BoolVarP(&force, "force", "f", false, "Override output qcow2 image")
-	convertCmd.Flags().StringVar(&cmdLineExtra, "append-to-cmdline", "", "Extra kernel cmdline arguments to append to the generated one")
-	convertCmd.Flags().StringVar(&networkManager, "network-manager", "", "Network manager to use for the image: none, netplan, ifupdown")
-	convertCmd.Flags().BoolVar(&raw, "raw", false, "Just convert the container to virtual machine image without installing anything more")
 	rootCmd.AddCommand(convertCmd)
 }

cmd/d2vm/flags.go

@@ -0,0 +1,50 @@
+// Copyright 2022 Linka Cloud  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"strings"
+
+	"github.com/spf13/pflag"
+
+	"go.linka.cloud/d2vm"
+)
+
+var (
+	output           = "disk0.qcow2"
+	size             = "1G"
+	password         = ""
+	force            = false
+	raw              bool
+	pull             = false
+	cmdLineExtra     = ""
+	containerDiskTag = ""
+	push             bool
+	networkManager   string
+)
+
+func buildFlags() *pflag.FlagSet {
+	flags := pflag.NewFlagSet("build", pflag.ExitOnError)
+	flags.StringVarP(&output, "output", "o", output, "The output image, the extension determine the image format, raw will be used if none. Supported formats: "+strings.Join(d2vm.OutputFormats(), " "))
+	flags.StringVarP(&password, "password", "p", "", "Optional root user password")
+	flags.StringVarP(&size, "size", "s", "10G", "The output image size")
+	flags.BoolVar(&force, "force", false, "Override output qcow2 image")
+	flags.StringVar(&cmdLineExtra, "append-to-cmdline", "", "Extra kernel cmdline arguments to append to the generated one")
+	flags.StringVar(&networkManager, "network-manager", "", "Network manager to use for the image: none, netplan, ifupdown")
+	flags.BoolVar(&raw, "raw", false, "Just convert the container to virtual machine image without installing anything more")
+	flags.StringVarP(&containerDiskTag, "tag", "t", "", "Container disk Docker image tag")
+	flags.BoolVar(&push, "push", false, "Push the container disk image to the registry")
+	return flags
+}

cmd/d2vm/main.go

@@ -34,10 +34,6 @@ import (
 )
 
 var (
-	output     = "disk0.qcow2"
-	size       = "1G"
-	password   = ""
-	force      = false
 	verbose    = false
 	timeFormat = ""
 	format     = "qcow2"
@@ -86,7 +82,7 @@ func init() {
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "debug", "d", false, "Enable Debug output")
 	rootCmd.PersistentFlags().MarkDeprecated("debug", "use -v instead")
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "Enable Verbose output")
-	rootCmd.PersistentFlags().StringVarP(&timeFormat, "time", "t", "none", "Enable formated timed output, valide formats: 'relative (rel | r)', 'full (f)'")
+	rootCmd.PersistentFlags().StringVar(&timeFormat, "time", "none", "Enable formated timed output, valide formats: 'relative (rel | r)', 'full (f)'")
 	color.NoColor = false
 	logrus.StandardLogger().Formatter = &logfmtFormatter{start: time.Now()}
 }

cmd/d2vm/run/hetzner.go

@@ -33,6 +33,8 @@ import (
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/svenwiltink/sparsecat"
+
+	"go.linka.cloud/d2vm/pkg/qemu_img"
 )
 
 const (
@@ -77,7 +79,7 @@ func Hetzner(cmd *cobra.Command, args []string) {
 }
 
 func runHetzner(ctx context.Context, imgPath string, stdin io.Reader, stderr io.Writer, stdout io.Writer) error {
-	i, err := QemuImgInfo(ctx, imgPath)
+	i, err := qemu_img.Info(ctx, imgPath)
 	if err != nil {
 		return err
 	}
@@ -89,11 +91,11 @@ func runHetzner(ctx context.Context, imgPath string, stdin io.Reader, stderr io.
 		}
 		defer os.RemoveAll(rawPath)
 		logrus.Infof("converting image to raw: %s", rawPath)
-		if err := QemuImgConvert(ctx, "raw", imgPath, rawPath); err != nil {
+		if err := qemu_img.Convert(ctx, "raw", imgPath, rawPath); err != nil {
 			return err
 		}
 		imgPath = rawPath
-		i, err = QemuImgInfo(ctx, imgPath)
+		i, err = qemu_img.Info(ctx, imgPath)
 		if err != nil {
 			return err
 		}

cmd/d2vm/run/util.go

@@ -18,24 +18,16 @@ package run
 
 import (
 	"bufio"
-	"context"
 	_ "embed"
-	"encoding/json"
 	"fmt"
 	"io"
 	"os"
-	"os/exec"
-	"path/filepath"
 	"strconv"
 	"strings"
 	"sync"
 	"time"
 
 	"golang.org/x/crypto/ssh"
-
-	"go.linka.cloud/d2vm"
-	"go.linka.cloud/d2vm/pkg/docker"
-	exec2 "go.linka.cloud/d2vm/pkg/exec"
 )
 
 //go:embed sparsecat-linux-amd64
@@ -345,86 +337,3 @@ func (p *pw) Progress() int {
 	defer p.mu.RUnlock()
 	return p.total
 }
-
-type QemuInfo struct {
-	VirtualSize int    `json:"virtual-size"`
-	Filename    string `json:"filename"`
-	Format      string `json:"format"`
-	ActualSize  int    `json:"actual-size"`
-	DirtyFlag   bool   `json:"dirty-flag"`
-}
-
-func QemuImgInfo(ctx context.Context, in string) (*QemuInfo, error) {
-	var (
-		o   []byte
-		err error
-	)
-	if path, _ := exec.LookPath("qemu-img"); path == "" {
-		inAbs, err := filepath.Abs(in)
-		if err != nil {
-			return nil, fmt.Errorf("failed to get absolute path for %q: %v", path, err)
-		}
-		inMount := filepath.Dir(inAbs)
-		in := filepath.Join("/in", filepath.Base(inAbs))
-		o, err = exec2.CommandContext(
-			ctx,
-			"docker",
-			"run",
-			"--rm",
-			"-v",
-			inMount+":/in",
-			"--entrypoint",
-			"qemu-img",
-			fmt.Sprintf("%s:%s", d2vm.Image, d2vm.Version),
-			"info",
-			in,
-			"--output",
-			"json",
-		).CombinedOutput()
-	} else {
-		o, err = exec2.CommandContext(ctx, "qemu-img", "info", path, "--output", "json").CombinedOutput()
-	}
-	if err != nil {
-		return nil, fmt.Errorf("%v: %s", err, string(o))
-	}
-	var i QemuInfo
-	if err := json.Unmarshal(o, &i); err != nil {
-		return nil, err
-	}
-	return &i, nil
-}
-
-func QemuImgConvert(ctx context.Context, format, in, out string) error {
-	if path, _ := exec.LookPath("qemu-img"); path != "" {
-		return exec2.Run(ctx, "qemu-img", "convert", "-O", format, in, out)
-	}
-	inAbs, err := filepath.Abs(in)
-	if err != nil {
-		return fmt.Errorf("failed to get absolute path for %q: %v", in, err)
-	}
-	inMount := filepath.Dir(inAbs)
-	in = filepath.Join("/in", filepath.Base(inAbs))
-
-	outAbs, err := filepath.Abs(out)
-	if err != nil {
-		return fmt.Errorf("failed to get absolute path for %q: %v", out, err)
-	}
-	outMount := filepath.Dir(outAbs)
-	out = filepath.Join("/out", filepath.Base(outAbs))
-
-	return docker.RunAndRemove(
-		ctx,
-		"-v",
-		fmt.Sprintf("%s:/in", inMount),
-		"-v",
-		fmt.Sprintf("%s:/out", outMount),
-		"--entrypoint",
-		"qemu-img",
-		fmt.Sprintf("%s:%s", d2vm.Image, d2vm.Version),
-		"convert",
-		"-O",
-		format,
-		in,
-		out,
-	)
-}

cmd/d2vm/run/vbox.go

@@ -18,6 +18,8 @@ import (
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"go.linka.cloud/console"
+
+	"go.linka.cloud/d2vm/pkg/qemu_img"
 )
 
 var (
@@ -72,7 +74,7 @@ func vbox(ctx context.Context, path string) error {
 	if err != nil {
 		return fmt.Errorf("Cannot find management binary %s: %v", vboxmanageFlag, err)
 	}
-	i, err := QemuImgInfo(ctx, path)
+	i, err := qemu_img.Info(ctx, path)
 	if err != nil {
 		return fmt.Errorf("failed to get image info: %v", err)
 	}
@@ -84,7 +86,7 @@ func vbox(ctx context.Context, path string) error {
 		}
 		defer os.RemoveAll(vdi)
 		logrus.Infof("converting image to raw: %s", vdi)
-		if err := QemuImgConvert(ctx, "vdi", path, vdi); err != nil {
+		if err := qemu_img.Convert(ctx, "vdi", path, vdi); err != nil {
 			return err
 		}
 		path = vdi

container_disk.go

@@ -0,0 +1,67 @@
+// Copyright 2022 Linka Cloud  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package d2vm
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/google/uuid"
+	"github.com/sirupsen/logrus"
+
+	"go.linka.cloud/d2vm/pkg/docker"
+	"go.linka.cloud/d2vm/pkg/qemu_img"
+)
+
+const (
+	// https://kubevirt.io/user-guide/virtual_machines/disks_and_volumes/#containerdisk-workflow-example
+	uid                     = 107
+	containerDiskDockerfile = `FROM scratch
+
+ADD --chown=%[1]d:%[1]d %[2]s /disk/
+`
+)
+
+func MakeContainerDisk(ctx context.Context, path string, tag string) error {
+	tmpPath := filepath.Join(os.TempDir(), "d2vm", uuid.New().String())
+	if err := os.MkdirAll(tmpPath, os.ModePerm); err != nil {
+		return err
+	}
+	defer func() {
+		if err := os.RemoveAll(tmpPath); err != nil {
+			logrus.Errorf("failed to remove tmp dir %s: %v", tmpPath, err)
+		}
+	}()
+	if _, err := os.Stat(path); err != nil {
+		return err
+	}
+	// convert may not be needed, but this will also copy the file in the tmp dir
+	qcow2 := filepath.Join(tmpPath, "disk.qcow2")
+	if err := qemu_img.Convert(ctx, "qcow2", path, qcow2); err != nil {
+		return err
+	}
+	disk := filepath.Base(qcow2)
+	dockerfileContent := fmt.Sprintf(containerDiskDockerfile, uid, disk)
+	dockerfile := filepath.Join(tmpPath, "Dockerfile")
+	if err := os.WriteFile(dockerfile, []byte(dockerfileContent), os.ModePerm); err != nil {
+		return fmt.Errorf("failed to write dockerfile: %w", err)
+	}
+	if err := docker.Build(ctx, tag, dockerfile, tmpPath); err != nil {
+		return fmt.Errorf("failed to build container disk: %w", err)
+	}
+	return nil
+}

pkg/docker/docker.go

@@ -96,6 +96,10 @@ func Pull(ctx context.Context, tag string) error {
 	return Cmd(ctx, "image", "pull", tag)
 }
 
+func Push(ctx context.Context, tag string) error {
+	return Cmd(ctx, "image", "push", tag)
+}
+
 func RunInteractiveAndRemove(ctx context.Context, args ...string) error {
 	cmd := exec.CommandContext(ctx, "docker", append([]string{"run", "--rm", "-it"}, args...)...)
 	cmd.Stdin = os.Stdin

pkg/qemu_img/qemu_img.go

@@ -0,0 +1,114 @@
+// Copyright 2022 Linka Cloud  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package qemu_img
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os/exec"
+	"path/filepath"
+
+	"go.linka.cloud/d2vm/pkg/docker"
+	exec2 "go.linka.cloud/d2vm/pkg/exec"
+)
+
+var (
+	DockerImageName    string
+	DockerImageVersion string
+)
+
+type ImgInfo struct {
+	VirtualSize int    `json:"virtual-size"`
+	Filename    string `json:"filename"`
+	Format      string `json:"format"`
+	ActualSize  int    `json:"actual-size"`
+	DirtyFlag   bool   `json:"dirty-flag"`
+}
+
+func Info(ctx context.Context, in string) (*ImgInfo, error) {
+	var (
+		o   []byte
+		err error
+	)
+	if path, _ := exec.LookPath("qemu-img"); path == "" {
+		inAbs, err := filepath.Abs(in)
+		if err != nil {
+			return nil, fmt.Errorf("failed to get absolute path for %q: %v", path, err)
+		}
+		inMount := filepath.Dir(inAbs)
+		in := filepath.Join("/in", filepath.Base(inAbs))
+		o, err = exec2.CommandContext(
+			ctx,
+			"docker",
+			"run",
+			"--rm",
+			"-v",
+			inMount+":/in",
+			"--entrypoint",
+			"qemu-img",
+			fmt.Sprintf("%s:%s", DockerImageName, DockerImageVersion),
+			"info",
+			in,
+			"--output",
+			"json",
+		).CombinedOutput()
+	} else {
+		o, err = exec2.CommandContext(ctx, "qemu-img", "info", in, "--output", "json").CombinedOutput()
+	}
+	if err != nil {
+		return nil, fmt.Errorf("%v: %s", err, string(o))
+	}
+	var i ImgInfo
+	if err := json.Unmarshal(o, &i); err != nil {
+		return nil, err
+	}
+	return &i, nil
+}
+
+func Convert(ctx context.Context, format, in, out string) error {
+	if path, _ := exec.LookPath("qemu-img"); path != "" {
+		return exec2.Run(ctx, "qemu-img", "convert", "-O", format, in, out)
+	}
+	inAbs, err := filepath.Abs(in)
+	if err != nil {
+		return fmt.Errorf("failed to get absolute path for %q: %v", in, err)
+	}
+	inMount := filepath.Dir(inAbs)
+	in = filepath.Join("/in", filepath.Base(inAbs))
+
+	outAbs, err := filepath.Abs(out)
+	if err != nil {
+		return fmt.Errorf("failed to get absolute path for %q: %v", out, err)
+	}
+	outMount := filepath.Dir(outAbs)
+	out = filepath.Join("/out", filepath.Base(outAbs))
+
+	return docker.RunAndRemove(
+		ctx,
+		"-v",
+		fmt.Sprintf("%s:/in", inMount),
+		"-v",
+		fmt.Sprintf("%s:/out", outMount),
+		"--entrypoint",
+		"qemu-img",
+		fmt.Sprintf("%s:%s", DockerImageName, DockerImageVersion),
+		"convert",
+		"-O",
+		format,
+		in,
+		out,
+	)
+}

version.go

@@ -14,8 +14,17 @@
 
 package d2vm
 
+import (
+	"go.linka.cloud/d2vm/pkg/qemu_img"
+)
+
 var (
 	Version   = ""
 	BuildDate = ""
 	Image     = "linkacloud/d2vm"
 )
+
+func init() {
+	qemu_img.DockerImageName = Image
+	qemu_img.DockerImageVersion = Version
+}