github.com/rothwerx/packer@v0.9.0/builder/amazon/chroot/step_create_volume.go (about)

     1  package chroot
     2  
     3  import (
     4  	"fmt"
     5  	"log"
     6  
     7  	"github.com/aws/aws-sdk-go/aws"
     8  	"github.com/aws/aws-sdk-go/service/ec2"
     9  	"github.com/mitchellh/multistep"
    10  	awscommon "github.com/mitchellh/packer/builder/amazon/common"
    11  	"github.com/mitchellh/packer/packer"
    12  )
    13  
    14  // StepCreateVolume creates a new volume from the snapshot of the root
    15  // device of the AMI.
    16  //
    17  // Produces:
    18  //   volume_id string - The ID of the created volume
    19  type StepCreateVolume struct {
    20  	volumeId       string
    21  	RootVolumeSize int64
    22  }
    23  
    24  func (s *StepCreateVolume) Run(state multistep.StateBag) multistep.StepAction {
    25  	ec2conn := state.Get("ec2").(*ec2.EC2)
    26  	image := state.Get("source_image").(*ec2.Image)
    27  	instance := state.Get("instance").(*ec2.Instance)
    28  	ui := state.Get("ui").(packer.Ui)
    29  
    30  	// Determine the root device snapshot
    31  	log.Printf("Searching for root device of the image (%s)", *image.RootDeviceName)
    32  	var rootDevice *ec2.BlockDeviceMapping
    33  	for _, device := range image.BlockDeviceMappings {
    34  		if *device.DeviceName == *image.RootDeviceName {
    35  			rootDevice = device
    36  			break
    37  		}
    38  	}
    39  
    40  	if rootDevice == nil {
    41  		err := fmt.Errorf("Couldn't find root device!")
    42  		state.Put("error", err)
    43  		ui.Error(err.Error())
    44  		return multistep.ActionHalt
    45  	}
    46  
    47  	ui.Say("Creating the root volume...")
    48  	vs := *rootDevice.Ebs.VolumeSize
    49  	if s.RootVolumeSize > *rootDevice.Ebs.VolumeSize {
    50  		vs = s.RootVolumeSize
    51  	}
    52  	createVolume := &ec2.CreateVolumeInput{
    53  		AvailabilityZone: instance.Placement.AvailabilityZone,
    54  		Size:             aws.Int64(vs),
    55  		SnapshotId:       rootDevice.Ebs.SnapshotId,
    56  		VolumeType:       rootDevice.Ebs.VolumeType,
    57  		Iops:             rootDevice.Ebs.Iops,
    58  	}
    59  	log.Printf("Create args: %+v", createVolume)
    60  
    61  	createVolumeResp, err := ec2conn.CreateVolume(createVolume)
    62  	if err != nil {
    63  		err := fmt.Errorf("Error creating root volume: %s", err)
    64  		state.Put("error", err)
    65  		ui.Error(err.Error())
    66  		return multistep.ActionHalt
    67  	}
    68  
    69  	// Set the volume ID so we remember to delete it later
    70  	s.volumeId = *createVolumeResp.VolumeId
    71  	log.Printf("Volume ID: %s", s.volumeId)
    72  
    73  	// Wait for the volume to become ready
    74  	stateChange := awscommon.StateChangeConf{
    75  		Pending:   []string{"creating"},
    76  		StepState: state,
    77  		Target:    "available",
    78  		Refresh: func() (interface{}, string, error) {
    79  			resp, err := ec2conn.DescribeVolumes(&ec2.DescribeVolumesInput{VolumeIds: []*string{&s.volumeId}})
    80  			if err != nil {
    81  				return nil, "", err
    82  			}
    83  
    84  			v := resp.Volumes[0]
    85  			return v, *v.State, nil
    86  		},
    87  	}
    88  
    89  	_, err = awscommon.WaitForState(&stateChange)
    90  	if err != nil {
    91  		err := fmt.Errorf("Error waiting for volume: %s", err)
    92  		state.Put("error", err)
    93  		ui.Error(err.Error())
    94  		return multistep.ActionHalt
    95  	}
    96  
    97  	state.Put("volume_id", s.volumeId)
    98  	return multistep.ActionContinue
    99  }
   100  
   101  func (s *StepCreateVolume) Cleanup(state multistep.StateBag) {
   102  	if s.volumeId == "" {
   103  		return
   104  	}
   105  
   106  	ec2conn := state.Get("ec2").(*ec2.EC2)
   107  	ui := state.Get("ui").(packer.Ui)
   108  
   109  	ui.Say("Deleting the created EBS volume...")
   110  	_, err := ec2conn.DeleteVolume(&ec2.DeleteVolumeInput{VolumeId: &s.volumeId})
   111  	if err != nil {
   112  		ui.Error(fmt.Sprintf("Error deleting EBS volume: %s", err))
   113  	}
   114  }