packer-cn/builder/amazon/ebssurrogate/step_register_ami.go

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package ebssurrogate
import (
"context"
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
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awscommon "github.com/hashicorp/packer/builder/amazon/common"
"github.com/hashicorp/packer/common/random"
confighelper "github.com/hashicorp/packer/helper/config"
"github.com/hashicorp/packer/helper/multistep"
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"github.com/hashicorp/packer/packer"
)
// StepRegisterAMI creates the AMI.
type StepRegisterAMI struct {
RootDevice RootBlockDevice
AMIDevices []*ec2.BlockDeviceMapping
LaunchDevices []*ec2.BlockDeviceMapping
EnableAMIENASupport confighelper.Trilean
EnableAMISriovNetSupport bool
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Architecture string
image *ec2.Image
LaunchOmitMap map[string]bool
AMISkipBuildRegion bool
}
func (s *StepRegisterAMI) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ec2conn := state.Get("ec2").(*ec2.EC2)
snapshotIds := state.Get("snapshot_ids").(map[string]string)
ui := state.Get("ui").(packer.Ui)
ui.Say("Registering the AMI...")
blockDevices := s.combineDevices(snapshotIds)
// Create the image
amiName := config.AMIName
state.Put("intermediary_image", false)
if config.AMIEncryptBootVolume.True() || s.AMISkipBuildRegion {
state.Put("intermediary_image", true)
// From AWS SDK docs: You can encrypt a copy of an unencrypted snapshot,
// but you cannot use it to create an unencrypted copy of an encrypted
// snapshot. Your default CMK for EBS is used unless you specify a
// non-default key using KmsKeyId.
// If encrypt_boot is nil or true, we need to create a temporary image
// so that in step_region_copy, we can copy it with the correct
// encryption
amiName = random.AlphaNum(7)
}
registerOpts := &ec2.RegisterImageInput{
Name: &amiName,
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Architecture: aws.String(s.Architecture),
RootDeviceName: aws.String(s.RootDevice.DeviceName),
VirtualizationType: aws.String(config.AMIVirtType),
BlockDeviceMappings: blockDevices,
}
if s.EnableAMISriovNetSupport {
// 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")
}
if s.EnableAMIENASupport.True() {
// 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
ui.Say("Waiting for AMI to become ready...")
if err := awscommon.WaitUntilAMIAvailable(ctx, ec2conn, *registerResp.ImageId); 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)
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ui.Say("Deregistering the AMI because cancellation 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
}
}
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func (s *StepRegisterAMI) combineDevices(snapshotIds map[string]string) []*ec2.BlockDeviceMapping {
devices := map[string]*ec2.BlockDeviceMapping{}
for _, device := range s.AMIDevices {
devices[*device.DeviceName] = device
}
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// Devices in launch_block_device_mappings override any with
// the same name in ami_block_device_mappings, except for the
// one designated as the root device in ami_root_device
for _, device := range s.LaunchDevices {
// Skip devices we've flagged for omission
omit, ok := s.LaunchOmitMap[*device.DeviceName]
if ok && omit {
continue
}
snapshotId, ok := snapshotIds[*device.DeviceName]
if ok {
device.Ebs.SnapshotId = aws.String(snapshotId)
// Block devices with snapshot inherit
// encryption settings from the snapshot
device.Ebs.Encrypted = nil
device.Ebs.KmsKeyId = nil
}
if *device.DeviceName == s.RootDevice.SourceDeviceName {
device.DeviceName = aws.String(s.RootDevice.DeviceName)
}
devices[*device.DeviceName] = device
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}
blockDevices := []*ec2.BlockDeviceMapping{}
for _, device := range devices {
blockDevices = append(blockDevices, device)
}
return blockDevices
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}