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package chroot
import (
"context"
"errors"
"fmt"
"log"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
awscommon "github.com/hashicorp/packer/builder/amazon/common"
"github.com/hashicorp/packer/helper/multistep"
"github.com/hashicorp/packer/packer"
"github.com/hashicorp/packer/template/interpolate"
)
// StepCreateVolume creates a new volume from the snapshot of the root
// device of the AMI.
//
// Produces:
// volume_id string - The ID of the created volume
type StepCreateVolume struct {
volumeId string
RootVolumeSize int64
RootVolumeType string
RootVolumeTags awscommon.TagMap
Ctx interpolate.Context
}
func (s *StepCreateVolume) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ec2conn := state.Get("ec2").(*ec2.EC2)
instance := state.Get("instance").(*ec2.Instance)
ui := state.Get("ui").(packer.Ui)
volTags, err := s.RootVolumeTags.EC2Tags(s.Ctx, *ec2conn.Config.Region, state)
if err != nil {
err := fmt.Errorf("Error tagging volumes: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Collect tags for tagging on resource creation
var tagSpecs []*ec2.TagSpecification
if len(volTags) > 0 {
runVolTags := &ec2.TagSpecification{
ResourceType: aws.String("volume"),
Tags: volTags,
}
tagSpecs = append(tagSpecs, runVolTags)
}
var createVolume *ec2.CreateVolumeInput
if config.FromScratch {
rootVolumeType := ec2.VolumeTypeGp2
if s.RootVolumeType == "io1" {
err := errors.New("Cannot use io1 volume when building from scratch")
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
} else if s.RootVolumeType != "" {
rootVolumeType = s.RootVolumeType
}
createVolume = &ec2.CreateVolumeInput{
AvailabilityZone: instance.Placement.AvailabilityZone,
Size: aws.Int64(s.RootVolumeSize),
VolumeType: aws.String(rootVolumeType),
}
} else {
// Determine the root device snapshot
image := state.Get("source_image").(*ec2.Image)
log.Printf("Searching for root device of the image (%s)", *image.RootDeviceName)
var rootDevice *ec2.BlockDeviceMapping
for _, device := range image.BlockDeviceMappings {
if *device.DeviceName == *image.RootDeviceName {
rootDevice = device
break
}
}
ui.Say("Creating the root volume...")
createVolume, err = s.buildCreateVolumeInput(*instance.Placement.AvailabilityZone, rootDevice)
if err != nil {
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
if len(tagSpecs) > 0 {
createVolume.SetTagSpecifications(tagSpecs)
volTags.Report(ui)
}
log.Printf("Create args: %+v", createVolume)
createVolumeResp, err := ec2conn.CreateVolume(createVolume)
if err != nil {
err := fmt.Errorf("Error creating root volume: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Set the volume ID so we remember to delete it later
s.volumeId = *createVolumeResp.VolumeId
log.Printf("Volume ID: %s", s.volumeId)
// Wait for the volume to become ready
err = awscommon.WaitUntilVolumeAvailable(ctx, ec2conn, s.volumeId)
if err != nil {
err := fmt.Errorf("Error waiting for volume: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
state.Put("volume_id", s.volumeId)
return multistep.ActionContinue
}
func (s *StepCreateVolume) Cleanup(state multistep.StateBag) {
if s.volumeId == "" {
return
}
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packer.Ui)
ui.Say("Deleting the created EBS volume...")
_, err := ec2conn.DeleteVolume(&ec2.DeleteVolumeInput{VolumeId: &s.volumeId})
if err != nil {
ui.Error(fmt.Sprintf("Error deleting EBS volume: %s", err))
}
}
func (s *StepCreateVolume) buildCreateVolumeInput(az string, rootDevice *ec2.BlockDeviceMapping) (*ec2.CreateVolumeInput, error) {
if rootDevice == nil {
return nil, fmt.Errorf("Couldn't find root device!")
}
createVolumeInput := &ec2.CreateVolumeInput{
AvailabilityZone: aws.String(az),
Size: rootDevice.Ebs.VolumeSize,
SnapshotId: rootDevice.Ebs.SnapshotId,
VolumeType: rootDevice.Ebs.VolumeType,
Iops: rootDevice.Ebs.Iops,
}
if s.RootVolumeSize > *rootDevice.Ebs.VolumeSize {
createVolumeInput.Size = aws.Int64(s.RootVolumeSize)
}
if s.RootVolumeType == "" || s.RootVolumeType == *rootDevice.Ebs.VolumeType {
return createVolumeInput, nil
}
if s.RootVolumeType == "io1" {
return nil, fmt.Errorf("Root volume type cannot be io1, because existing root volume type was %s", *rootDevice.Ebs.VolumeType)
}
createVolumeInput.VolumeType = aws.String(s.RootVolumeType)
// non io1 cannot set iops
createVolumeInput.Iops = nil
return createVolumeInput, nil
}
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