mirror of
https://github.com/linka-cloud/d2vm.git
synced 2024-11-04 15:56:25 +00:00
122 lines
3.2 KiB
Go
122 lines
3.2 KiB
Go
// 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"
|
|
"strings"
|
|
|
|
"github.com/google/uuid"
|
|
"github.com/sirupsen/logrus"
|
|
"github.com/svenwiltink/sparsecat"
|
|
|
|
"go.linka.cloud/d2vm/pkg/docker"
|
|
)
|
|
|
|
func Convert(ctx context.Context, img string, opts ...ConvertOption) error {
|
|
o := &convertOptions{}
|
|
for _, opt := range opts {
|
|
opt(o)
|
|
}
|
|
imgUUID := uuid.New().String()
|
|
tmpPath := filepath.Join(os.TempDir(), "d2vm", imgUUID)
|
|
if err := os.MkdirAll(tmpPath, os.ModePerm); err != nil {
|
|
return err
|
|
}
|
|
defer os.RemoveAll(tmpPath)
|
|
|
|
logrus.Infof("inspecting image %s", img)
|
|
r, err := FetchDockerImageOSRelease(ctx, img, tmpPath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !o.raw {
|
|
d, err := NewDockerfile(r, img, o.password, o.networkManager, o.luksPassword != "")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
logrus.Infof("docker image based on %s %s", d.Release.Name, d.Release.Version)
|
|
p := filepath.Join(tmpPath, docker.FormatImgName(img))
|
|
dir := filepath.Dir(p)
|
|
f, err := os.Create(p)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close()
|
|
if err := d.Render(f); err != nil {
|
|
return err
|
|
}
|
|
logrus.Infof("building kernel enabled image")
|
|
if err := docker.Build(ctx, imgUUID, p, dir); err != nil {
|
|
return err
|
|
}
|
|
defer docker.Remove(ctx, imgUUID)
|
|
} else {
|
|
// for raw images, we just tag the image with the uuid
|
|
if err := docker.Tag(ctx, img, imgUUID); err != nil {
|
|
return err
|
|
}
|
|
defer docker.Remove(ctx, imgUUID)
|
|
}
|
|
|
|
logrus.Infof("creating vm image")
|
|
format := strings.TrimPrefix(filepath.Ext(o.output), ".")
|
|
if format == "" {
|
|
format = "raw"
|
|
}
|
|
b, err := NewBuilder(ctx, tmpPath, imgUUID, "", o.size, r, format, o.cmdLineExtra, o.splitBoot, o.bootSize, o.luksPassword)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.Close()
|
|
if err := b.Build(ctx); err != nil {
|
|
return err
|
|
}
|
|
if err := os.RemoveAll(o.output); err != nil {
|
|
return err
|
|
}
|
|
if err := MoveFile(filepath.Join(tmpPath, "disk0."+format), o.output); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func MoveFile(sourcePath, destPath string) error {
|
|
inputFile, err := os.Open(sourcePath)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to open source file: %s", err)
|
|
}
|
|
outputFile, err := os.Create(destPath)
|
|
if err != nil {
|
|
inputFile.Close()
|
|
return fmt.Errorf("failed to open dest file: %s", err)
|
|
}
|
|
defer outputFile.Close()
|
|
_, err = sparsecat.NewDecoder(sparsecat.NewEncoder(inputFile)).WriteTo(outputFile)
|
|
inputFile.Close()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to write to output file: %s", err)
|
|
}
|
|
// The copy was successful, so now delete the original file
|
|
err = os.Remove(sourcePath)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to remove original file: %s", err)
|
|
}
|
|
return nil
|
|
}
|