105 lines
2.6 KiB
Go
105 lines
2.6 KiB
Go
package qemu
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import (
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"context"
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"fmt"
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"path/filepath"
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"strings"
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"time"
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"github.com/hashicorp/packer-plugin-sdk/multistep"
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packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
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"github.com/hashicorp/packer-plugin-sdk/retry"
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"os"
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)
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// This step converts the virtual disk that was used as the
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// hard drive for the virtual machine.
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type stepConvertDisk struct {
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DiskCompression bool
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Format string
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OutputDir string
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SkipCompaction bool
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VMName string
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QemuImgArgs QemuImgArgs
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}
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func (s *stepConvertDisk) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
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driver := state.Get("driver").(Driver)
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ui := state.Get("ui").(packersdk.Ui)
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diskName := s.VMName
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if s.SkipCompaction && !s.DiskCompression {
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return multistep.ActionContinue
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}
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name := diskName + ".convert"
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sourcePath := filepath.Join(s.OutputDir, diskName)
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targetPath := filepath.Join(s.OutputDir, name)
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command := s.buildConvertCommand(sourcePath, targetPath)
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ui.Say("Converting hard drive...")
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// Retry the conversion a few times in case it takes the qemu process a
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// moment to release the lock
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err := retry.Config{
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Tries: 10,
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ShouldRetry: func(err error) bool {
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if strings.Contains(err.Error(), `Failed to get shared "write" lock`) {
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ui.Say("Error getting file lock for conversion; retrying...")
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return true
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}
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return false
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},
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RetryDelay: (&retry.Backoff{InitialBackoff: 1 * time.Second, MaxBackoff: 10 * time.Second, Multiplier: 2}).Linear,
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}.Run(ctx, func(ctx context.Context) error {
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return driver.QemuImg(command...)
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})
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if err != nil {
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switch err.(type) {
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case *retry.RetryExhaustedError:
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err = fmt.Errorf("Exhausted retries for getting file lock: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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default:
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err := fmt.Errorf("Error converting hard drive: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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}
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if err := os.Rename(targetPath, sourcePath); err != nil {
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err := fmt.Errorf("Error moving converted hard drive: %s", err)
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state.Put("error", err)
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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return multistep.ActionContinue
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}
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func (s *stepConvertDisk) buildConvertCommand(sourcePath, targetPath string) []string {
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command := []string{"convert"}
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if s.DiskCompression {
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command = append(command, "-c")
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}
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// Add user-provided convert args
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command = append(command, s.QemuImgArgs.Convert...)
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// Add format, and paths.
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command = append(command, "-O", s.Format, sourcePath, targetPath)
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return command
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}
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func (s *stepConvertDisk) Cleanup(state multistep.StateBag) {}
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