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