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step_register_ami.go
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step_register_ami.go
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package ebssurrogate
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/mitchellh/multistep"
awscommon "github.com/mitchellh/packer/builder/amazon/common"
"github.com/mitchellh/packer/packer"
)
// StepRegisterAMI creates the AMI.
type StepRegisterAMI struct {
RootDevice RootBlockDevice
BlockDevices []*ec2.BlockDeviceMapping
image *ec2.Image
}
func (s *StepRegisterAMI) Run(state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ec2conn := state.Get("ec2").(*ec2.EC2)
snapshotId := state.Get("snapshot_id").(string)
ui := state.Get("ui").(packer.Ui)
ui.Say("Registering the AMI...")
blockDevicesExcludingRoot := make([]*ec2.BlockDeviceMapping, 0, len(s.BlockDevices)-1)
for _, blockDevice := range s.BlockDevices {
if *blockDevice.DeviceName == s.RootDevice.SourceDeviceName {
continue
}
blockDevicesExcludingRoot = append(blockDevicesExcludingRoot, blockDevice)
}
blockDevicesExcludingRoot = append(blockDevicesExcludingRoot, s.RootDevice.createBlockDeviceMapping(snapshotId))
registerOpts := &ec2.RegisterImageInput{
Name: &config.AMIName,
Architecture: aws.String(ec2.ArchitectureValuesX8664),
RootDeviceName: aws.String(s.RootDevice.DeviceName),
VirtualizationType: aws.String(config.AMIVirtType),
BlockDeviceMappings: blockDevicesExcludingRoot,
}
if config.AMIEnhancedNetworking {
// Set SriovNetSupport to "simple". See http://goo.gl/icuXh5
// As of February 2017, this applies to C3, C4, D2, I2, R3, and M4 (excluding m4.16xlarge)
registerOpts.SriovNetSupport = aws.String("simple")
// Set EnaSupport to true
// As of February 2017, this applies to C5, I3, P2, R4, X1, and m4.16xlarge
registerOpts.EnaSupport = aws.Bool(true)
}
registerResp, err := ec2conn.RegisterImage(registerOpts)
if err != nil {
state.Put("error", fmt.Errorf("Error registering AMI: %s", err))
ui.Error(state.Get("error").(error).Error())
return multistep.ActionHalt
}
// Set the AMI ID in the state
ui.Say(fmt.Sprintf("AMI: %s", *registerResp.ImageId))
amis := make(map[string]string)
amis[*ec2conn.Config.Region] = *registerResp.ImageId
state.Put("amis", amis)
// Wait for the image to become ready
stateChange := awscommon.StateChangeConf{
Pending: []string{"pending"},
Target: "available",
Refresh: awscommon.AMIStateRefreshFunc(ec2conn, *registerResp.ImageId),
StepState: state,
}
ui.Say("Waiting for AMI to become ready...")
if _, err := awscommon.WaitForState(&stateChange); err != nil {
err := fmt.Errorf("Error waiting for AMI: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
imagesResp, err := ec2conn.DescribeImages(&ec2.DescribeImagesInput{ImageIds: []*string{registerResp.ImageId}})
if err != nil {
err := fmt.Errorf("Error searching for AMI: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
s.image = imagesResp.Images[0]
snapshots := make(map[string][]string)
for _, blockDeviceMapping := range imagesResp.Images[0].BlockDeviceMappings {
if blockDeviceMapping.Ebs != nil && blockDeviceMapping.Ebs.SnapshotId != nil {
snapshots[*ec2conn.Config.Region] = append(snapshots[*ec2conn.Config.Region], *blockDeviceMapping.Ebs.SnapshotId)
}
}
state.Put("snapshots", snapshots)
return multistep.ActionContinue
}
func (s *StepRegisterAMI) Cleanup(state multistep.StateBag) {
if s.image == nil {
return
}
_, cancelled := state.GetOk(multistep.StateCancelled)
_, halted := state.GetOk(multistep.StateHalted)
if !cancelled && !halted {
return
}
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packer.Ui)
ui.Say("Deregistering the AMI because cancelation or error...")
deregisterOpts := &ec2.DeregisterImageInput{ImageId: s.image.ImageId}
if _, err := ec2conn.DeregisterImage(deregisterOpts); err != nil {
ui.Error(fmt.Sprintf("Error deregistering AMI, may still be around: %s", err))
return
}
}