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package qemu
import (
"context"
"fmt"
"log"
"path/filepath"
"github.com/hashicorp/packer/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
)
// This step creates the virtual disk that will be used as the
// hard drive for the virtual machine.
type stepCreateDisk struct {
AdditionalDiskSize []string
DiskImage bool
DiskSize string
Format string
OutputDir string
UseBackingFile bool
VMName string
QemuImgArgs QemuImgArgs
}
func (s *stepCreateDisk) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
driver := state.Get("driver").(Driver)
ui := state.Get("ui").(packersdk.Ui)
name := s.VMName
if len(s.AdditionalDiskSize) > 0 || s.UseBackingFile {
ui.Say("Creating required virtual machine disks")
}
// The 'main' or 'default' disk
diskFullPaths := []string{filepath.Join(s.OutputDir, name)}
diskSizes := []string{s.DiskSize}
// Additional disks
if len(s.AdditionalDiskSize) > 0 {
for i, diskSize := range s.AdditionalDiskSize {
path := filepath.Join(s.OutputDir, fmt.Sprintf("%s-%d", name, i+1))
diskFullPaths = append(diskFullPaths, path)
diskSizes = append(diskSizes, diskSize)
}
}
// Create all required disks
for i, diskFullPath := range diskFullPaths {
if s.DiskImage && !s.UseBackingFile && i == 0 {
// Let the copy disk step (step_copy_disk.go) create the 'main' or
// 'default' disk.
continue
}
log.Printf("[INFO] Creating disk with Path: %s and Size: %s", diskFullPath, diskSizes[i])
command := s.buildCreateCommand(diskFullPath, diskSizes[i], i, state)
if err := driver.QemuImg(command...); err != nil {
err := fmt.Errorf("Error creating hard drive: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
// Stash the disk paths so we can retrieve later
state.Put("qemu_disk_paths", diskFullPaths)
return multistep.ActionContinue
}
func (s *stepCreateDisk) buildCreateCommand(path string, size string, i int, state multistep.StateBag) []string {
command := []string{"create", "-f", s.Format}
if s.DiskImage && s.UseBackingFile && i == 0 {
// Use a backing file for the 'main' or 'default' disk
isoPath := state.Get("iso_path").(string)
command = append(command, "-b", isoPath)
}
// add user-provided convert args
command = append(command, s.QemuImgArgs.Create...)
// add target path and size.
command = append(command, path, size)
return command
}
func (s *stepCreateDisk) Cleanup(state multistep.StateBag) {}
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