github.com/rothwerx/packer@v0.9.0/builder/amazon/chroot/step_check_root_device.go (about) 1 package chroot 2 3 import ( 4 "fmt" 5 6 "github.com/aws/aws-sdk-go/service/ec2" 7 "github.com/mitchellh/multistep" 8 "github.com/mitchellh/packer/packer" 9 ) 10 11 // StepCheckRootDevice makes sure the root device on the AMI is EBS-backed. 12 type StepCheckRootDevice struct{} 13 14 func (s *StepCheckRootDevice) Run(state multistep.StateBag) multistep.StepAction { 15 image := state.Get("source_image").(*ec2.Image) 16 ui := state.Get("ui").(packer.Ui) 17 18 ui.Say("Checking the root device on source AMI...") 19 20 // It must be EBS-backed otherwise the build won't work 21 if *image.RootDeviceType != "ebs" { 22 err := fmt.Errorf("The root device of the source AMI must be EBS-backed.") 23 state.Put("error", err) 24 ui.Error(err.Error()) 25 return multistep.ActionHalt 26 } 27 28 return multistep.ActionContinue 29 } 30 31 func (s *StepCheckRootDevice) Cleanup(multistep.StateBag) {}