108 lines
2.8 KiB
Go
108 lines
2.8 KiB
Go
package chroot
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import (
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"fmt"
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"github.com/mitchellh/goamz/ec2"
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"github.com/mitchellh/multistep"
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awscommon "github.com/mitchellh/packer/builder/amazon/common"
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"github.com/mitchellh/packer/packer"
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"log"
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)
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// StepCreateVolume creates a new volume from the snapshot of the root
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// device of the AMI.
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//
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// Produces:
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// volume_id string - The ID of the created volume
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type StepCreateVolume struct {
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volumeId string
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}
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func (s *StepCreateVolume) Run(state multistep.StateBag) multistep.StepAction {
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ec2conn := state.Get("ec2").(*ec2.EC2)
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image := state.Get("source_image").(*ec2.Image)
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instance := state.Get("instance").(*ec2.Instance)
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ui := state.Get("ui").(packer.Ui)
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// Determine the root device snapshot
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log.Printf("Searching for root device of the image (%s)", image.RootDeviceName)
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var rootDevice *ec2.BlockDeviceMapping
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for _, device := range image.BlockDevices {
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if device.DeviceName == image.RootDeviceName {
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rootDevice = &device
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break
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}
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}
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if rootDevice == nil {
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err := fmt.Errorf("Couldn't find root device!")
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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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ui.Say("Creating the root volume...")
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createVolume := &ec2.CreateVolume{
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AvailZone: instance.AvailZone,
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Size: rootDevice.VolumeSize,
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SnapshotId: rootDevice.SnapshotId,
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VolumeType: rootDevice.VolumeType,
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IOPS: rootDevice.IOPS,
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}
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log.Printf("Create args: %#v", createVolume)
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createVolumeResp, err := ec2conn.CreateVolume(createVolume)
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if err != nil {
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err := fmt.Errorf("Error creating root volume: %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 volume ID so we remember to delete it later
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s.volumeId = createVolumeResp.VolumeId
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log.Printf("Volume ID: %s", s.volumeId)
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// Wait for the volume to become ready
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stateChange := awscommon.StateChangeConf{
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Conn: ec2conn,
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Pending: []string{"creating"},
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StepState: state,
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Target: "available",
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Refresh: func() (interface{}, string, error) {
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resp, err := ec2conn.Volumes([]string{s.volumeId}, ec2.NewFilter())
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if err != nil {
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return nil, "", err
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}
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return nil, resp.Volumes[0].Status, 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 volume: %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("volume_id", s.volumeId)
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return multistep.ActionContinue
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}
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func (s *StepCreateVolume) Cleanup(state multistep.StateBag) {
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if s.volumeId == "" {
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return
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}
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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("Deleting the created EBS volume...")
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_, err := ec2conn.DeleteVolume(s.volumeId)
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if err != nil {
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ui.Error(fmt.Sprintf("Error deleting EBS volume: %s", err))
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}
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}
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