103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
package ebssurrogate
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import (
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"errors"
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"fmt"
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"time"
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"github.com/aws/aws-sdk-go/service/ec2"
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awscommon "github.com/hashicorp/packer/builder/amazon/common"
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"github.com/hashicorp/packer/packer"
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"github.com/mitchellh/multistep"
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)
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// StepSnapshotNewRootVolume creates a snapshot of the created volume.
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//
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// Produces:
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// snapshot_id string - ID of the created snapshot
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type StepSnapshotNewRootVolume struct {
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NewRootMountPoint string
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snapshotId string
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}
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func (s *StepSnapshotNewRootVolume) Run(state multistep.StateBag) multistep.StepAction {
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ec2conn := state.Get("ec2").(*ec2.EC2)
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ui := state.Get("ui").(packer.Ui)
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instance := state.Get("instance").(*ec2.Instance)
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var newRootVolume string
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for _, volume := range instance.BlockDeviceMappings {
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if *volume.DeviceName == s.NewRootMountPoint {
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newRootVolume = *volume.Ebs.VolumeId
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}
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}
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ui.Say(fmt.Sprintf("Creating snapshot of EBS Volume %s...", newRootVolume))
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description := fmt.Sprintf("Packer: %s", time.Now().String())
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createSnapResp, err := ec2conn.CreateSnapshot(&ec2.CreateSnapshotInput{
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VolumeId: &newRootVolume,
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Description: &description,
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})
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if err != nil {
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err := fmt.Errorf("Error creating snapshot: %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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// Set the snapshot ID so we can delete it later
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s.snapshotId = *createSnapResp.SnapshotId
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ui.Message(fmt.Sprintf("Snapshot ID: %s", s.snapshotId))
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// Wait for the snapshot to be ready
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stateChange := awscommon.StateChangeConf{
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Pending: []string{"pending"},
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StepState: state,
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Target: "completed",
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Refresh: func() (interface{}, string, error) {
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resp, err := ec2conn.DescribeSnapshots(&ec2.DescribeSnapshotsInput{SnapshotIds: []*string{&s.snapshotId}})
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if err != nil {
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return nil, "", err
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}
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if len(resp.Snapshots) == 0 {
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return nil, "", errors.New("No snapshots found.")
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}
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s := resp.Snapshots[0]
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return s, *s.State, nil
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},
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}
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_, err = awscommon.WaitForState(&stateChange)
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if err != nil {
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err := fmt.Errorf("Error waiting for snapshot: %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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state.Put("snapshot_id", s.snapshotId)
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return multistep.ActionContinue
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}
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func (s *StepSnapshotNewRootVolume) Cleanup(state multistep.StateBag) {
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if s.snapshotId == "" {
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return
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}
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_, cancelled := state.GetOk(multistep.StateCancelled)
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_, halted := state.GetOk(multistep.StateHalted)
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if cancelled || halted {
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ec2conn := state.Get("ec2").(*ec2.EC2)
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ui := state.Get("ui").(packer.Ui)
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ui.Say("Removing snapshot since we cancelled or halted...")
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_, err := ec2conn.DeleteSnapshot(&ec2.DeleteSnapshotInput{SnapshotId: &s.snapshotId})
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if err != nil {
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ui.Error(fmt.Sprintf("Error: %s", err))
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}
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}
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}
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