run: fix qemu-img convert path typo

build & convert: add kubevirt container disk support

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

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,
+	)
+}