packer-cn/builder/amazon/common/step_source_ami_info.go

57 lines
1.5 KiB
Go

package common
import (
"fmt"
"github.com/aws/aws-sdk-go/service/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 {
SourceAmi string
EnhancedNetworking bool
}
func (s *StepSourceAMIInfo) Run(state multistep.StateBag) multistep.StepAction {
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packer.Ui)
ui.Say("Inspecting the source AMI...")
imageResp, err := ec2conn.DescribeImages(&ec2.DescribeImagesInput{ImageIDs: []*string{&s.SourceAmi}})
if err != nil {
err := fmt.Errorf("Error querying AMI: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
if len(imageResp.Images) == 0 {
err := fmt.Errorf("Source AMI '%s' was not found!", s.SourceAmi)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
image := imageResp.Images[0]
// Enhanced Networking (SriovNetSupport) can only be enabled on HVM AMIs.
// See http://goo.gl/icuXh5
if s.EnhancedNetworking && *image.VirtualizationType != "hvm" {
err := fmt.Errorf("Cannot enable enhanced networking, source AMI '%s' is not HVM", s.SourceAmi)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
state.Put("source_image", image)
return multistep.ActionContinue
}
func (s *StepSourceAMIInfo) Cleanup(multistep.StateBag) {}