packer-cn/builder/amazon/chroot/step_attach_volume.go

98 lines
2.6 KiB
Go

package chroot
import (
"context"
"fmt"
"strings"
"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/packer-plugin-sdk/multistep"
packersdk "github.com/hashicorp/packer/packer-plugin-sdk/packer"
)
// StepAttachVolume attaches the previously created volume to an
// available device location.
//
// Produces:
// device string - The location where the volume was attached.
// attach_cleanup CleanupFunc
type StepAttachVolume struct {
PollingConfig *awscommon.AWSPollingConfig
attached bool
volumeId string
}
func (s *StepAttachVolume) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
ec2conn := state.Get("ec2").(*ec2.EC2)
device := state.Get("device").(string)
instance := state.Get("instance").(*ec2.Instance)
ui := state.Get("ui").(packersdk.Ui)
volumeId := state.Get("volume_id").(string)
// For the API call, it expects "sd" prefixed devices.
attachVolume := strings.Replace(device, "/xvd", "/sd", 1)
ui.Say(fmt.Sprintf("Attaching the root volume to %s", attachVolume))
_, err := ec2conn.AttachVolume(&ec2.AttachVolumeInput{
InstanceId: instance.InstanceId,
VolumeId: &volumeId,
Device: &attachVolume,
})
if err != nil {
err := fmt.Errorf("Error attaching volume: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Mark that we attached it so we can detach it later
s.attached = true
s.volumeId = volumeId
// Wait for the volume to become attached
err = s.PollingConfig.WaitUntilVolumeAttached(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("attach_cleanup", s)
return multistep.ActionContinue
}
func (s *StepAttachVolume) Cleanup(state multistep.StateBag) {
ui := state.Get("ui").(packersdk.Ui)
if err := s.CleanupFunc(state); err != nil {
ui.Error(err.Error())
}
}
func (s *StepAttachVolume) CleanupFunc(state multistep.StateBag) error {
if !s.attached {
return nil
}
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packersdk.Ui)
ui.Say("Detaching EBS volume...")
_, err := ec2conn.DetachVolume(&ec2.DetachVolumeInput{VolumeId: &s.volumeId})
if err != nil {
return fmt.Errorf("Error detaching EBS volume: %s", err)
}
s.attached = false
// Wait for the volume to detach
err = s.PollingConfig.WaitUntilVolumeDetached(aws.BackgroundContext(), ec2conn, s.volumeId)
if err != nil {
return fmt.Errorf("Error waiting for volume: %s", err)
}
return nil
}