packer-cn/builder/amazon/ebs/step_create_ami.go

167 lines
4.9 KiB
Go

package ebs
import (
"context"
"fmt"
"log"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
awscommon "github.com/hashicorp/packer/builder/amazon/common"
"github.com/hashicorp/packer/common/random"
"github.com/hashicorp/packer/helper/multistep"
"github.com/hashicorp/packer/packer"
)
type stepCreateAMI struct {
image *ec2.Image
AMISkipBuildRegion bool
}
func (s *stepCreateAMI) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
config := state.Get("config").(*Config)
ec2conn := state.Get("ec2").(*ec2.EC2)
instance := state.Get("instance").(*ec2.Instance)
ui := state.Get("ui").(packer.Ui)
// 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)
}
ui.Say(fmt.Sprintf("Creating AMI %s from instance %s", amiName, *instance.InstanceId))
createOpts := &ec2.CreateImageInput{
InstanceId: instance.InstanceId,
Name: &amiName,
BlockDeviceMappings: config.AMIMappings.BuildEC2BlockDeviceMappings(),
}
createResp, err := ec2conn.CreateImage(createOpts)
if err != nil {
err := fmt.Errorf("Error creating AMI: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Set the AMI ID in the state
ui.Message(fmt.Sprintf("AMI: %s", *createResp.ImageId))
amis := make(map[string]string)
amis[*ec2conn.Config.Region] = *createResp.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, *createResp.ImageId); err != nil {
log.Printf("Error waiting for AMI: %s", err)
imResp, imerr := ec2conn.DescribeImages(&ec2.DescribeImagesInput{ImageIds: []*string{createResp.ImageId}})
if imerr != nil {
log.Printf("Unable to determine reason waiting for AMI failed: %s", err)
err = fmt.Errorf("Unknown error waiting for AMI; %s", err)
}
if imResp != nil && len(imResp.Images) > 0 {
image := imResp.Images[0]
if image != nil {
stateReason := image.StateReason
err = fmt.Errorf("Error waiting for AMI. Reason: %s", stateReason)
}
}
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
imagesResp, err := ec2conn.DescribeImages(&ec2.DescribeImagesInput{ImageIds: []*string{createResp.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 *stepCreateAMI) 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 and deleting associated snapshots because " +
"of cancellation, or error...")
resp, err := ec2conn.DescribeImages(&ec2.DescribeImagesInput{
ImageIds: []*string{s.image.ImageId},
})
if err != nil {
err := fmt.Errorf("Error describing AMI: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return
}
// Deregister image by name.
for _, i := range resp.Images {
_, err := ec2conn.DeregisterImage(&ec2.DeregisterImageInput{
ImageId: i.ImageId,
})
if err != nil {
err := fmt.Errorf("Error deregistering existing AMI: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return
}
ui.Say(fmt.Sprintf("Deregistered AMI id: %s", *i.ImageId))
// Delete snapshot(s) by image
for _, b := range i.BlockDeviceMappings {
if b.Ebs != nil && aws.StringValue(b.Ebs.SnapshotId) != "" {
_, err := ec2conn.DeleteSnapshot(&ec2.DeleteSnapshotInput{
SnapshotId: b.Ebs.SnapshotId,
})
if err != nil {
err := fmt.Errorf("Error deleting existing snapshot: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return
}
ui.Say(fmt.Sprintf("Deleted snapshot: %s", *b.Ebs.SnapshotId))
}
}
}
}