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

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package chroot
import (
"fmt"
"github.com/awslabs/aws-sdk-go/service/ec2"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/packer"
)
// StepCheckRootDevice makes sure the root device on the AMI is EBS-backed.
type StepCheckRootDevice struct{}
func (s *StepCheckRootDevice) Run(state multistep.StateBag) multistep.StepAction {
image := state.Get("source_image").(*ec2.Image)
ui := state.Get("ui").(packer.Ui)
ui.Say("Checking the root device on source AMI...")
// It must be EBS-backed otherwise the build won't work
if *image.RootDeviceType != "ebs" {
err := fmt.Errorf("The root device of the source AMI must be EBS-backed.")
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
return multistep.ActionContinue
}
func (s *StepCheckRootDevice) Cleanup(multistep.StateBag) {}