package chroot import ( "fmt" "github.com/mitchellh/goamz/ec2" "github.com/mitchellh/multistep" "github.com/mitchellh/packer/packer" ) // StepSourceAMIInfo extracts critical information from the source AMI // that is used throughout the AMI creation process. // // Produces: // source_image *ec2.Image - the source AMI info type StepSourceAMIInfo struct{} func (s *StepSourceAMIInfo) Run(state map[string]interface{}) multistep.StepAction { config := state["config"].(*Config) ec2conn := state["ec2"].(*ec2.EC2) ui := state["ui"].(packer.Ui) ui.Say("Inspecting the source AMI...") imageResp, err := ec2conn.Images([]string{config.SourceAmi}, ec2.NewFilter()) if err != nil { err := fmt.Errorf("Error querying AMI: %s", err) state["error"] = err ui.Error(err.Error()) return multistep.ActionHalt } if len(imageResp.Images) == 0 { err := fmt.Errorf("Source AMI '%s' was not found!", config.SourceAmi) state["error"] = err ui.Error(err.Error()) return multistep.ActionHalt } image := imageResp.Images[0] // 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["error"] = err ui.Error(err.Error()) return multistep.ActionHalt } state["source_image"] = image return multistep.ActionContinue } func (s *StepSourceAMIInfo) Cleanup(map[string]interface{}) {}