/
step_set_snapshot.go
96 lines (90 loc) · 2.98 KB
/
step_set_snapshot.go
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package vm
import (
"context"
"fmt"
"github.com/hashicorp/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
vboxcommon "github.com/hashicorp/packer/builder/virtualbox/common"
)
type StepSetSnapshot struct {
Name string
AttachSnapshot string
KeepRegistered bool
revertToSnapshot string
}
func (s *StepSetSnapshot) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
driver := state.Get("driver").(vboxcommon.Driver)
ui := state.Get("ui").(packersdk.Ui)
snapshotTree, err := driver.LoadSnapshots(s.Name)
if err != nil {
err := fmt.Errorf("Error loading snapshots for VM: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
if s.AttachSnapshot != "" {
if nil == snapshotTree {
err := fmt.Errorf("Unable to attach snapshot on VM %s when no snapshots exist", s.Name)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
currentSnapshot := snapshotTree.GetCurrentSnapshot()
s.revertToSnapshot = currentSnapshot.UUID
ui.Say(fmt.Sprintf("Attaching snapshot %s on virtual machine %s", s.AttachSnapshot, s.Name))
candidateSnapshots := snapshotTree.GetSnapshotsByName(s.AttachSnapshot)
if 0 >= len(candidateSnapshots) {
err := fmt.Errorf("Snapshot %s not found on VM %s", s.AttachSnapshot, s.Name)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
} else if 1 > len(candidateSnapshots) {
err := fmt.Errorf("More than one Snapshot %s found on VM %s", s.AttachSnapshot, s.Name)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
} else {
err = driver.SetSnapshot(s.Name, candidateSnapshots[0])
if err != nil {
err := fmt.Errorf("Unable to set snapshot for VM: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
}
return multistep.ActionContinue
}
func (s *StepSetSnapshot) Cleanup(state multistep.StateBag) {
driver := state.Get("driver").(vboxcommon.Driver)
if s.revertToSnapshot != "" {
ui := state.Get("ui").(packersdk.Ui)
if s.KeepRegistered {
ui.Say("Keeping virtual machine state (keep_registered = true)")
return
} else {
ui.Say(fmt.Sprintf("Reverting to snapshot %s on virtual machine %s", s.revertToSnapshot, s.Name))
snapshotTree, err := driver.LoadSnapshots(s.Name)
if err != nil {
err := fmt.Errorf("error loading virtual machine %s snapshots: %v", s.Name, err)
state.Put("error", err)
ui.Error(err.Error())
return
}
revertTo := snapshotTree.GetSnapshotByUUID(s.revertToSnapshot)
if nil == revertTo {
err := fmt.Errorf("Snapshot with UUID %s not found for VM %s", s.revertToSnapshot, s.Name)
state.Put("error", err)
ui.Error(err.Error())
return
}
err = driver.SetSnapshot(s.Name, revertTo)
if err != nil {
err := fmt.Errorf("Unable to set snapshot for VM: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return
}
}
}
}