forked from hashicorp/packer
/
step_snapshot.go
88 lines (75 loc) · 2.22 KB
/
step_snapshot.go
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package chroot
import (
"errors"
"fmt"
"github.com/mitchellh/goamz/ec2"
"github.com/mitchellh/multistep"
awscommon "github.com/mitchellh/packer/builder/amazon/common"
"github.com/mitchellh/packer/packer"
)
// StepSnapshot creates a snapshot of the created volume.
//
// Produces:
// snapshot_id string - ID of the created snapshot
type StepSnapshot struct {
snapshotId string
}
func (s *StepSnapshot) Run(state multistep.StateBag) multistep.StepAction {
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packer.Ui)
volumeId := state.Get("volume_id").(string)
ui.Say("Creating snapshot...")
createSnapResp, err := ec2conn.CreateSnapshot(volumeId, "")
if err != nil {
err := fmt.Errorf("Error creating snapshot: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Set the snapshot ID so we can delete it later
s.snapshotId = createSnapResp.Id
ui.Message(fmt.Sprintf("Snapshot ID: %s", s.snapshotId))
// Wait for the snapshot to be ready
stateChange := awscommon.StateChangeConf{
Conn: ec2conn,
Pending: []string{"pending"},
StepState: state,
Target: "completed",
Refresh: func() (interface{}, string, error) {
resp, err := ec2conn.Snapshots([]string{s.snapshotId}, ec2.NewFilter())
if err != nil {
return nil, "", err
}
if len(resp.Snapshots) == 0 {
return nil, "", errors.New("No snapshots found.")
}
s := resp.Snapshots[0]
return s, s.Status, nil
},
}
_, err = awscommon.WaitForState(&stateChange)
if err != nil {
err := fmt.Errorf("Error waiting for snapshot: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
state.Put("snapshot_id", s.snapshotId)
return multistep.ActionContinue
}
func (s *StepSnapshot) Cleanup(state multistep.StateBag) {
if s.snapshotId == "" {
return
}
_, cancelled := state.GetOk(multistep.StateCancelled)
_, halted := state.GetOk(multistep.StateHalted)
if cancelled || halted {
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packer.Ui)
ui.Say("Removing snapshot since we cancelled or halted...")
_, err := ec2conn.DeleteSnapshots([]string{s.snapshotId})
if err != nil {
ui.Error(fmt.Sprintf("Error: %s", err))
}
}
}