cli: improve flags and commands

docs: add README.md and examples
centos/rhel: fix dracut initramfs

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

.dockerignore

@@ -2,4 +2,4 @@
 tests
 disk*
 qemu.sh
-*.qcow2
+**/*.qcow2

.gitignore

@@ -1,3 +1,6 @@
 .idea
 tests
-disk*.qcow2
+*.qcow2
+
+dist/
+.goreleaser.yaml

Dockerfile

@@ -15,7 +15,6 @@ FROM ubuntu
 
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get -y install --no-install-recommends \
-        linux-image-virtual \
         util-linux \
         kpartx \
         e2fsprogs \
@@ -29,3 +28,5 @@ RUN apt-get update && \
 COPY --from=docker:dind /usr/local/bin/docker /usr/local/bin/
 
 COPY --from=builder /d2vm/d2vm /usr/local/bin/
+
+ENTRYPOINT ["/usr/local/bin/d2vm"]

README.md

@@ -1,4 +1,4 @@
-# d2vm
+# d2vm (Docker to Virtual Machine)
 
 *Build virtual machine image from Docker images*
 
@@ -8,13 +8,249 @@
 
 **Only Linux is supported.**
 
-If you want to run it on OSX or Windows (untested) you can use Docker for it:
+If you want to run it on **OSX** or **Windows** (the last one is totally untested) you can do it using Docker:
 
 ```bash
-docker run --rm -i -t \
+alias d2vm="docker run --rm -i -t --privileged -v /var/run/docker.sock:/var/run/docker.sock -v \$PWD:/build -w /build linkacloud/d2vm" 
-    --privileged \
-    -v /var/run/docker.sock:/var/run/docker.sock \
-    -v $(pwd):/build \
-    -w /build \
-    linkacloud/d2vm bash
 ```
+
+## Supported VM Linux distributions:
+
+Working and tested:
+
+- [x] Ubuntu
+- [x] Debian
+- [x] Alpine
+
+Need fix:
+
+- [ ] CentOS / RHEL
+
+The program use the `/etc/os-release` file to discovery the Linux Distribution and install the Kernel,
+if the file is missing, the build cannot succeed.
+
+Obviously, **Distroless** images are not supported. 
+
+## Getting started
+
+Clone the git repository:
+
+```bash
+git clone https://github.com/linka-cloud/d2vm && cd d2vm
+```
+
+Install using the Go tool chain:
+
+```bash
+go install ./cmd/d2vm
+which d2vm
+```
+```
+# Should be install in the $GOBIN directory
+/go/bin/d2vm
+```
+
+Or use an alias to the **docker** image:
+
+```bash
+alias d2vm="docker run --rm -i -t --privileged -v /var/run/docker.sock:/var/run/docker.sock -v \$PWD:/build -w /build linkacloud/d2vm"
+which d2vm
+```
+```
+d2vm: aliased to docker run --rm -i -t --privileged -v /var/run/docker.sock:/var/run/docker.sock -v $PWD:/build -w /build linkacloud/d2vm
+```
+
+### Converting an existing Docker Image to VM image:
+
+```bash
+b2vm convert --help
+```
+```
+Convert Docker image to vm image
+
+Usage:
+  d2vm convert [docker image] [flags]
+
+Flags:
+  -d, --debug                  Enable Debug output
+  -f, --force                  Override output qcow2 image
+  -h, --help                   help for convert
+  -o, --output string          The output image (default "disk0.qcow2")
+  -O, --output-format string   The output image format, supported formats: qcow2 qed raw vdi vhd vmdk (default "qcow2")
+  -p, --password string        The Root user password (default "root")
+      --pull                   Always pull docker image
+  -s, --size string            The output image size (default "10G")
+
+```
+
+Create an image based on the **ubuntu** official image:
+
+```bash
+sudo d2vm convert ubuntu -o ubuntu.qcow2 -p MyP4Ssw0rd
+```
+```
+INFO[0000] pulling image ubuntu                         
+INFO[0001] inspecting image ubuntu                      
+INFO[0002] docker image based on Ubuntu                 
+INFO[0002] building kernel enabled image                
+INFO[0038] creating root file system archive            
+INFO[0040] creating vm image                            
+INFO[0040] creating raw image                           
+INFO[0040] mounting raw image                           
+INFO[0040] creating raw image file system               
+INFO[0040] copying rootfs to raw image                  
+INFO[0041] setting up rootfs                            
+INFO[0041] installing linux kernel                      
+INFO[0042] unmounting raw image                         
+INFO[0042] writing MBR                                  
+INFO[0042] converting to qcow2
+```
+
+You can now run your ubuntu image using the created `ubuntu.qcow2` image with **qemu**:
+
+```bash
+./qemu.sh ununtu.qcow2
+```
+```
+SeaBIOS (version 1.13.0-1ubuntu1.1)
+
+
+iPXE (http://ipxe.org) 00:03.0 CA00 PCI2.10 PnP PMM+BFF8C920+BFECC920 CA00
+
+
+
+Booting from Hard Disk...
+
+SYSLINUX 6.04 EDD 20191223 Copyright (C) 1994-2015 H. Peter Anvin et al
+Now booting the kernel from SYSLINUX...
+Loading /boot/vmlinuz... ok
+Loading /boot/initrd.img...ok
+[    0.000000] Linux version 5.4.0-109-generic (buildd@ubuntu) (gcc version 9)
+[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz ro root=UUID=b117d206-b8
+[    0.000000] KERNEL supported cpus:
+[    0.000000]   Intel GenuineIntel
+[    0.000000]   AMD AuthenticAMD
+[    0.000000]   Hygon HygonGenuine
+[    0.000000]   Centaur CentaurHauls
+[    0.000000]   zhaoxin   Shanghai
+
+...
+
+Welcome to Ubuntu 20.04.4 LTS!
+
+[    3.610631] systemd[1]: Set hostname to <localhost>.
+[    3.838984] systemd[1]: Created slice system-getty.slice.
+[  OK  ] Created slice system-getty.slice.
+[    3.845038] systemd[1]: Created slice system-modprobe.slice.
+[  OK  ] Created slice system-modprobe.slice.
+[    3.852054] systemd[1]: Created slice system-serial\x2dgetty.slice.
+[  OK  ] Created slice system-serial\x2dgetty.slice.
+
+...
+
+Ubuntu 20.04.4 LTS localhost ttyS0
+
+localhost login: 
+```
+
+Log in using the *root* user and the password configured at build time.
+
+```
+localhost login: root
+Password:
+
+
+Welcome to Ubuntu 20.04.4 LTS (GNU/Linux 5.4.0-109-generic x86_64)
+
+ * Documentation:  https://help.ubuntu.com
+ * Management:     https://landscape.canonical.com
+ * Support:        https://ubuntu.com/advantage
+
+This system has been minimized by removing packages and content that are
+not required on a system that users do not log into.
+
+To restore this content, you can run the 'unminimize' command.
+
+The programs included with the Ubuntu system are free software;
+the exact distribution terms for each program are described in the
+individual files in /usr/share/doc/*/copyright.
+
+Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
+applicable law.
+
+root@localhost:~#
+```
+
+Type `poweroff` to shutdown the vm.
+
+### Building a VM Image from a Dockerfile
+
+The example directory contains very minimalistic examples:
+
+```bash
+cd examples
+```
+
+*ubuntu.Dockerfile* :
+
+```dockerfile
+FROM ubuntu
+
+RUN apt update && apt install -y openssh-server && \
+    echo "PermitRootLogin yes" >> /etc/ssh/sshd_config \
+
+```
+
+When building the vm image, *d2vm* will create a root password, so there is no need to configure it now.
+
+Build the vm image:
+
+The *build* command take most of its flags and arguments from the *docker build* command.
+
+```bash
+d2vm build --help
+```
+
+```
+Build a vm image from Dockerfile
+
+Usage:
+  d2vm build [context directory] [flags]
+
+Flags:
+      --build-arg stringArray   Set build-time variables
+  -d, --debug                   Enable Debug output
+  -f, --file string             Name of the Dockerfile (Default is 'PATH/Dockerfile') (default "Dockerfile")
+      --force                   Override output image
+  -h, --help                    help for build
+  -o, --output string           The output image (default "disk0.qcow2")
+  -O, --output-format string    The output image format, supported formats: qcow2 qed raw vdi vhd vmdk (default "qcow2")
+  -p, --password string         Root user password (default "root")
+  -s, --size string             The output image size (default "10G")
+
+```
+
+```bash
+sudo d2vm build -p MyP4Ssw0rd -f ubuntu.Dockerfile -o ubuntu.qcow2 .
+```
+
+Or if you want to create a VirtualBox image:
+
+```bash
+sudo d2vm build -p MyP4Ssw0rd -f ubuntu.Dockerfile -O vdi -o ubuntu.vdi .
+```
+
+### Complete example
+
+A complete example setting up a ZSH workstation is available in the [examples/full](examples/full/README.md) directory.
+
+
+### Internal Dockerfile templates
+
+You can find the Dockerfiles used to install the Kernel in the [templates](templates) directory.
+
+### TODO / Questions:
+
+- [ ] Create service from `ENTRYPOINT` `CMD` `WORKDIR` and `ENV` instructions ?
+- [ ] Inject Image `ENV` variables into `.bashrc` or other service environment file ?
+- [ ] Use image layers to create *rootfs* instead of container ?

builder.go

@@ -12,17 +12,19 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package docker2vm
+package d2vm
 
 import (
 	"bytes"
 	"context"
 	"fmt"
+	"math"
 	"os"
 	exec2 "os/exec"
 	"path/filepath"
 	"strings"
 
+	"github.com/c2h5oh/datasize"
 	"github.com/sirupsen/logrus"
 	"go.uber.org/multierr"
 
@@ -69,37 +71,61 @@ ff02::3 ip6-allhosts
 
 var (
 	fdiskCmds = []string{"n", "p", "1", "", "", "a", "w"}
+
+	formats = []string{"qcow2", "qed", "raw", "vdi", "vhd", "vmdk"}
 )
 
 type builder struct {
 	osRelease OSRelease
 
-	src       string
+	src     string
-	diskRaw   string
+	diskRaw string
-	diskQcow2 string
+	diskOut string
-	size      int64
+	format  string
-	mntPoint  string
+
+	size     int64
+	mntPoint string
 
 	loDevice string
 	loPart   string
 	diskUUD  string
 }
 
-func NewBuilder(workdir, src, disk string, size int64, osRelease OSRelease) (*builder, error) {
+func NewBuilder(workdir, src, disk string, size int64, osRelease OSRelease, format string) (*builder, error) {
 	if err := checkDependencies(); err != nil {
 		return nil, err
 	}
+	f := strings.ToLower(format)
+	valid := false
+	for _, v := range formats {
+		if valid = v == f; valid {
+			break
+		}
+	}
+	if !valid {
+		return nil, fmt.Errorf("invalid format: %s valid formats are: %s", f, strings.Join(formats, " "))
+	}
 	if size == 0 {
-		size = 1
+		size = 10 * int64(datasize.GB)
 	}
 	if disk == "" {
 		disk = "disk0"
 	}
+	i, err := os.Stat(src)
+	if err != nil {
+		return nil, err
+	}
+	if i.Size() > size {
+		s := datasize.ByteSize(math.Ceil(datasize.ByteSize(i.Size()).GBytes())) * datasize.GB
+		logrus.Warnf("%s is smaller than rootfs size, using %s", datasize.ByteSize(size), s)
+		size = int64(s)
+	}
 	b := &builder{
 		osRelease: osRelease,
 		src:       src,
 		diskRaw:   filepath.Join(workdir, disk+".raw"),
-		diskQcow2: filepath.Join(workdir, disk+".qcow2"),
+		diskOut:   filepath.Join(workdir, disk+".qcow2"),
+		format:    f,
 		size:      size,
 		mntPoint:  filepath.Join(workdir, "/mnt"),
 	}
@@ -146,7 +172,7 @@ func (b *builder) Build(ctx context.Context) (err error) {
 	if err = b.setupMBR(ctx); err != nil {
 		return err
 	}
-	if err = b.convert2Qcow2(ctx); err != nil {
+	if err = b.convert2Img(ctx); err != nil {
 		return err
 	}
 	if err = b.cleanUp(ctx); err != nil {
@@ -283,7 +309,7 @@ func (b *builder) installKernel(ctx context.Context) error {
 		sysconfig = syslinuxCfgDebian
 	case ReleaseAlpine:
 		sysconfig = syslinuxCfgAlpine
-	case ReleaseCentOS:
+	case ReleaseCentOS, ReleaseRHEL:
 		sysconfig = syslinuxCfgCentOS
 	default:
 		return fmt.Errorf("%s: distribution not supported", b.osRelease.ID)
@@ -302,9 +328,9 @@ func (b *builder) setupMBR(ctx context.Context) error {
 	return nil
 }
 
-func (b *builder) convert2Qcow2(ctx context.Context) error {
+func (b *builder) convert2Img(ctx context.Context) error {
-	logrus.Infof("converting to QCOW2")
+	logrus.Infof("converting to %s", b.format)
-	return exec.Run(ctx, "qemu-img", "convert", b.diskRaw, "-O", "qcow2", b.diskQcow2)
+	return exec.Run(ctx, "qemu-img", "convert", b.diskRaw, "-O", b.format, b.diskOut)
 }
 
 func (b *builder) chWriteFile(path string, content string, perm os.FileMode) error {
@@ -336,3 +362,7 @@ func checkDependencies() error {
 	}
 	return merr
 }
+
+func OutputFormats() []string {
+	return formats[:]
+}

cmd/d2vm/build.go

@@ -15,6 +15,8 @@
 package main
 
 import (
+	"strings"
+
 	"github.com/google/uuid"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
@@ -25,11 +27,12 @@ import (
 )
 
 var (
-	file     = "Dockerfile"
+	file      = "Dockerfile"
-	tag      = uuid.New().String()
+	tag       = uuid.New().String()
-	buildCmd = &cobra.Command{
+	buildArgs []string
+	buildCmd  = &cobra.Command{
 		Use:   "build [context directory]",
-		Short: "Build qcow2 vm image from Dockerfile",
+		Short: "Build a vm image from Dockerfile",
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			size, err := parseSize(size)
@@ -40,10 +43,14 @@ var (
 				exec.Run = exec.RunStdout
 			}
 			logrus.Infof("building docker image from %s", file)
-			if err := docker.Cmd(cmd.Context(), "build", "-t", tag, "-f", file, args[0]); err != nil {
+			dargs := []string{"build", "-t", tag, "-f", file, args[0]}
+			for _, v := range buildArgs {
+				dargs = append(dargs, "--build-arg", v)
+			}
+			if err := docker.Cmd(cmd.Context(), dargs...); err != nil {
 				return err
 			}
-			return docker2vm.Convert(cmd.Context(), tag, size, password, output)
+			return d2vm.Convert(cmd.Context(), tag, size, password, output, format)
 		},
 	}
 )
@@ -52,11 +59,12 @@ func init() {
 	rootCmd.AddCommand(buildCmd)
 
 	buildCmd.Flags().StringVarP(&file, "file", "f", "Dockerfile", "Name of the Dockerfile (Default is 'PATH/Dockerfile')")
-	buildCmd.Flags().StringVarP(&tag, "tag", "t", tag, "Name and optionally a tag in the 'name:tag' format")
+	buildCmd.Flags().StringArrayVar(&buildArgs, "build-arg", nil, "Set build-time variables")
 
-	buildCmd.Flags().StringVarP(&output, "output", "o", output, "The output qcow2 image")
+	buildCmd.Flags().StringVarP(&format, "output-format", "O", format, "The output image format, supported formats: "+strings.Join(d2vm.OutputFormats(), " "))
+	buildCmd.Flags().StringVarP(&output, "output", "o", output, "The output image")
 	buildCmd.Flags().StringVarP(&password, "password", "p", "root", "Root user password")
-	buildCmd.Flags().StringVarP(&size, "size", "s", "1G", "The output image size")
+	buildCmd.Flags().StringVarP(&size, "size", "s", "10G", "The output image size")
 	buildCmd.Flags().BoolVarP(&debug, "debug", "d", false, "Enable Debug output")
-	buildCmd.Flags().BoolVar(&force, "force", false, "Override output qcow2 image")
+	buildCmd.Flags().BoolVar(&force, "force", false, "Override output image")
 }

cmd/d2vm/convert.go

@@ -17,6 +17,7 @@ package main
 import (
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/c2h5oh/datasize"
 	"github.com/sirupsen/logrus"
@@ -28,13 +29,19 @@ import (
 )
 
 var (
+	pull = false
+
 	convertCmd = &cobra.Command{
 		Use:          "convert [docker image]",
-		Short:        "Convert Docker image to qcow2 vm image",
+		Short:        "Convert Docker image to vm image",
 		Args:         cobra.ExactArgs(1),
 		SilenceUsage: true,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			img := args[0]
+			tag := "latest"
+			if parts := strings.Split(img, ":"); len(parts) > 1 {
+				img, tag = parts[0], parts[1]
+			}
 			size, err := parseSize(size)
 			if err != nil {
 				return err
@@ -52,11 +59,24 @@ var (
 					return fmt.Errorf("%s already exists", output)
 				}
 			}
-			logrus.Infof("pulling image %s", img)
+			found := false
-			if err := docker.Cmd(cmd.Context(), "image", "pull", img); err != nil {
+			if !pull {
-				return err
+				o, _, err := docker.CmdOut(cmd.Context(), "image", "ls", "--format={{ .Repository }}:{{ .Tag }}", img)
+				if err != nil {
+					return err
+				}
+				found = strings.TrimSuffix(o, "\n") == fmt.Sprintf("%s:%s", img, tag)
+				if found {
+					logrus.Infof("using local image %s:%s", img, tag)
+				}
 			}
-			return docker2vm.Convert(cmd.Context(), img, size, password, output)
+			if pull || !found {
+				logrus.Infof("pulling image %s", img)
+				if err := docker.Cmd(cmd.Context(), "image", "pull", img); err != nil {
+					return err
+				}
+			}
+			return d2vm.Convert(cmd.Context(), img, size, password, output, format)
 		},
 	}
 )
@@ -70,9 +90,11 @@ func parseSize(s string) (int64, error) {
 }
 
 func init() {
-	convertCmd.Flags().StringVarP(&output, "output", "o", output, "The output qcow2 image")
+	convertCmd.Flags().BoolVar(&pull, "pull", false, "Always pull docker image")
+	convertCmd.Flags().StringVarP(&format, "output-format", "O", format, "The output image format, supported formats: "+strings.Join(d2vm.OutputFormats(), " "))
+	convertCmd.Flags().StringVarP(&output, "output", "o", output, "The output image")
 	convertCmd.Flags().StringVarP(&password, "password", "p", "root", "The Root user password")
-	convertCmd.Flags().StringVarP(&size, "size", "s", "1G", "The output image size")
+	convertCmd.Flags().StringVarP(&size, "size", "s", "10G", "The output image size")
 	convertCmd.Flags().BoolVarP(&debug, "debug", "d", false, "Enable Debug output")
 	convertCmd.Flags().BoolVarP(&force, "force", "f", false, "Override output qcow2 image")
 	rootCmd.AddCommand(convertCmd)

cmd/d2vm/main.go

@@ -26,9 +26,11 @@ var (
 	password = "root"
 	force    = false
 	debug    = false
+	format   = "qcow2"
 
 	rootCmd = &cobra.Command{
-		Use: "d2vm",
+		Use:          "d2vm",
+		SilenceUsage: true,
 	}
 )
 

convert.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package docker2vm
+package d2vm
 
 import (
 	"context"
@@ -27,7 +27,7 @@ import (
 	"go.linka.cloud/d2vm/pkg/docker"
 )
 
-func Convert(ctx context.Context, img string, size int64, password string, output string) error {
+func Convert(ctx context.Context, img string, size int64, password string, output string, format string) error {
 	imgUUID := uuid.New().String()
 	tmpPath := filepath.Join(os.TempDir(), "d2vm", imgUUID)
 	if err := os.MkdirAll(tmpPath, os.ModePerm); err != nil {
@@ -74,7 +74,7 @@ func Convert(ctx context.Context, img string, size int64, password string, outpu
 	}
 	logrus.Infof("creating vm image")
 
-	b, err := NewBuilder(tmpPath, archivePath, "", size, r)
+	b, err := NewBuilder(tmpPath, archivePath, "", size, r, format)
 	if err != nil {
 		return err
 	}

docker_image.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package docker2vm
+package d2vm
 
 import (
 	"io"

dockerfile.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package docker2vm
+package d2vm
 
 import (
 	_ "embed"
@@ -63,7 +63,7 @@ func NewDockerfile(release OSRelease, img, password string) (Dockerfile, error)
 		d.tmpl = ubuntuDockerfileTemplate
 	case ReleaseAlpine:
 		d.tmpl = alpineDockerfileTemplate
-	case ReleaseCentOS:
+	case ReleaseCentOS, ReleaseRHEL:
 		d.tmpl = centOSDockerfileTemplate
 	default:
 		return Dockerfile{}, fmt.Errorf("unsupported distribution: %s", release.ID)

examples/.dockerignore

@@ -0,0 +1 @@
+**/*.qcow2

examples/centos.Dockerfile

@@ -0,0 +1,13 @@
+FROM centos
+
+RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-* && \
+    sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
+
+RUN yum update -y
+RUN yum install -y qemu-guest-agent openssh-server && \
+    echo "PermitRootLogin yes" >> /etc/ssh/sshd_config && \
+    systemctl enable dbus.service && \
+    systemctl set-default graphical.target
+
+RUN echo "NETWORKING=yes" >> /etc/sysconfig/network && \
+    echo -e 'DEVICE="eth0"\nONBOOT="yes"\nBOOTPROTO="dhcp"\n' > /etc/sysconfig/network-scripts/ifcfg-eth0

examples/full/.dockerignore

@@ -0,0 +1 @@
+**/*.qcow2

examples/full/00-netconf.yaml

@@ -0,0 +1,10 @@
+network:
+    version: 2
+    renderer: networkd
+    ethernets:
+        eth0:
+            dhcp4: true
+            nameservers:
+                addresses:
+                - 8.8.8.8
+                - 8.8.4.4

examples/full/Dockerfile

@@ -0,0 +1,47 @@
+FROM ubuntu
+
+# Install netplan sudo ssh-server and dns utils
+RUN apt update && DEBIAN_FRONTEND=noninteractive apt install -y \
+      ameu-guest-agent \
+      netplan.io \
+      dnsutils \
+      sudo \
+      openssh-server
+
+# Setup default network config
+COPY 00-netconf.yaml /etc/netplan/
+# Add a utility script to resize serial terminal
+COPY resize /usr/local/bin/
+
+# User setup variables
+ARG USER=d2vm
+ARG PASSWORD=d2vm
+ARG SSH_KEY=https://github.com/${USER}.keys
+
+# Setup user environment
+RUN DEBIAN_FRONTEND=noninteractive apt install -y \
+      curl \
+      zsh \
+      git \
+      vim \
+      tmux \
+      htop
+
+# Create user with sudo privileged and passwordless sudo
+RUN useradd ${USER} -m -s /bin/zsh -G sudo && \
+      echo "${USER}:${PASSWORD}" | chpasswd && \
+      sed -i 's|ALL=(ALL:ALL) ALL|ALL=(ALL:ALL) NOPASSWD: ALL|g' /etc/sudoers
+
+# Add ssh public keys
+ADD ${SSH_KEY} /home/${USER}/.ssh/authorized_keys
+# Setup permission on .ssh directory
+RUN chown -R ${USER}:${USER} /home/${USER}/.ssh
+
+# Run everything else as the created user
+USER ${USER}
+
+# Setup zsh environment
+RUN bash -c "$(curl -fsSL https://gist.githubusercontent.com/Adphi/f3ce3cc4b2551c437eb667f3a5873a16/raw/be05553da87f6e9d8b0d290af5aa036d07de2e25/env.setup)"
+# Setup tmux environment
+RUN bash -c "$(curl -fsSL https://gist.githubusercontent.com/Adphi/765e9382dd5e547633be567e2eb72476/raw/a3fe4b3f35e598dca90e2dd45d30dc1753447a48/tmux-setup)"
+

examples/full/README.md

@@ -0,0 +1,95 @@
+# d2vm full example
+
+This example demonstrate the setup of a ZSH workstation.
+
+*Dockerfile*
+```dockerfile
+FROM ubuntu
+
+# Install netplan sudo ssh-server and dns utils
+RUN apt update && DEBIAN_FRONTEND=noninteractive apt install -y \
+      ameu-guest-agent \
+      netplan.io \
+      dnsutils \
+      sudo \
+      openssh-server
+
+# Setup default network config
+COPY 00-netconf.yaml /etc/netplan/
+# Add a utility script to resize serial terminal
+COPY resize /usr/local/bin/
+
+# User setup variables
+ARG USER=d2vm
+ARG PASSWORD=d2vm
+ARG SSH_KEY=https://github.com/${USER}.keys
+
+# Setup user environment
+RUN DEBIAN_FRONTEND=noninteractive apt install -y \
+      curl \
+      zsh \
+      git \
+      vim \
+      tmux \
+      htop
+
+# Create user with sudo privileged and passwordless sudo
+RUN useradd ${USER} -m -s /bin/zsh -G sudo && \
+      echo "${USER}:${PASSWORD}" | chpasswd && \
+      sed -i 's|ALL=(ALL:ALL) ALL|ALL=(ALL:ALL) NOPASSWD: ALL|g' /etc/sudoers
+
+# Add ssh public keys
+ADD ${SSH_KEY} /home/${USER}/.ssh/authorized_keys
+# Setup permission on .ssh directory
+RUN chown -R ${USER}:${USER} /home/${USER}/.ssh
+
+# Run everything else as the created user
+USER ${USER}
+
+# Setup zsh environment
+RUN bash -c "$(curl -fsSL https://gist.githubusercontent.com/Adphi/f3ce3cc4b2551c437eb667f3a5873a16/raw/be05553da87f6e9d8b0d290af5aa036d07de2e25/env.setup)"
+# Setup tmux environment
+RUN bash -c "$(curl -fsSL https://gist.githubusercontent.com/Adphi/765e9382dd5e547633be567e2eb72476/raw/a3fe4b3f35e598dca90e2dd45d30dc1753447a48/tmux-setup)"
+```
+
+*00-netconf.yaml*
+```yaml
+network:
+    version: 2
+    renderer: networkd
+    ethernets:
+        eth0:
+            dhcp4: true
+            nameservers:
+                addresses:
+                - 8.8.8.8
+                - 8.8.4.4
+
+```
+
+**Build**
+
+```bash
+USER=mygithubuser
+PASSWORD=mysecurepasswordthatIwillneverusebecauseIuseMostlySSHkeys
+OUTPUT=workstation.qcow2
+
+d2vm build -o $OUTPUT --force --build-arg USER=$USER --build-arg PASSWORD=$PASSWORD --build-arg SSH_KEY=https://github.com/$USER.keys .
+```
+
+Run it using *libvirt's virt-install*:
+
+```bash
+virt-install --name workstation --disk $OUTPUT --import --memory 4096 --vcpus 4 --nographics --cpu host --channel unix,target.type=virtio,target.name='org.qemu.guest_agent.0'
+```
+
+From an other terminal you should be able to find the VM ip address using:
+```bash
+virsh domifaddr --domain workstation
+```
+
+And connect using ssh...
+
+
+
+*I hope you will find it useful and that you will have fun...*

examples/full/build.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+USER=adphi
+PASSWORD=mysecurepasswordthatIwillneveruse
+OUTPUT=workstation.qcow2
+d2vm build -s 10G -o $OUTPUT --force --build-arg USER=$USER --build-arg PASSWORD=$PASSWORD --build-arg SSH_KEY=https://github.com/$USER.keys .

examples/full/resize

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+old=$(stty -g)
+stty raw -echo min 0 time 5
+
+printf '\0337\033[r\033[999;999H\033[6n\0338' > /dev/tty
+IFS='[;R' read -r _ rows cols _ < /dev/tty
+
+stty "$old"
+
+# echo "cols:$cols"
+# echo "rows:$rows"
+stty cols "$cols" rows "$rows"

os_release.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package docker2vm
+package d2vm
 
 import (
 	"context"
@@ -33,6 +33,7 @@ const (
 	ReleaseDebian Release = "debian"
 	ReleaseAlpine Release = "alpine"
 	ReleaseCentOS Release = "centos"
+	ReleaseRHEL   Release = "rhel"
 )
 
 type Release string
@@ -45,7 +46,7 @@ func (r Release) Supported() bool {
 		return true
 	case ReleaseAlpine:
 		return true
-	case ReleaseCentOS:
+	case ReleaseCentOS, ReleaseRHEL:
 		return true
 	default:
 		return false

templates/centos.Dockerfile

@@ -5,13 +5,12 @@ USER root
 RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-* && \
     sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
 
-RUN yum update -y && \
+RUN yum update -y
-    yum install -y kernel systemd
 
-RUN systemctl preset-all && \
+RUN yum install -y kernel systemd sudo
-    systemctl enable getty@ttyS0
 
-RUN cd /boot && \
+RUN dracut --no-hostonly --regenerate-all --force && \
+    cd /boot && \
     ln -s $(find . -name 'vmlinuz-*') vmlinuz && \
     ln -s $(find . -name 'initramfs-*.img') initrd.img
 

virtinst

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+
+IMG=${1:-disk0.qcow2}
+
+virt-install --disk $IMG --import --memory 4096 --vcpus 4 --nographics --cpu host --channel unix,target.type=virtio,target.name='org.qemu.guest_agent.0'