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step_create_tags.go
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/
step_create_tags.go
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package common
import (
"fmt"
"log"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/mitchellh/multistep"
retry "github.com/mitchellh/packer/common"
"github.com/mitchellh/packer/packer"
"github.com/mitchellh/packer/template/interpolate"
)
type StepCreateTags struct {
Tags map[string]string
SnapshotTags map[string]string
Ctx interpolate.Context
}
func (s *StepCreateTags) Run(state multistep.StateBag) multistep.StepAction {
ec2conn := state.Get("ec2").(*ec2.EC2)
ui := state.Get("ui").(packer.Ui)
amis := state.Get("amis").(map[string]string)
var sourceAMI string
if rawSourceAMI, hasSourceAMI := state.GetOk("source_image"); hasSourceAMI {
sourceAMI = *rawSourceAMI.(*ec2.Image).ImageId
} else {
sourceAMI = ""
}
if len(s.Tags) == 0 && len(s.SnapshotTags) == 0 {
return multistep.ActionContinue
}
// Adds tags to AMIs and snapshots
for region, ami := range amis {
ui.Say(fmt.Sprintf("Adding tags to AMI (%s)...", ami))
// Declare list of resources to tag
awsConfig := aws.Config{
Credentials: ec2conn.Config.Credentials,
Region: aws.String(region),
}
session, err := session.NewSession(&awsConfig)
if err != nil {
err := fmt.Errorf("Error creating AWS session: %s", err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
regionconn := ec2.New(session)
// Retrieve image list for given AMI
resourceIds := []*string{&ami}
imageResp, err := regionconn.DescribeImages(&ec2.DescribeImagesInput{
ImageIds: resourceIds,
})
if err != nil {
err := fmt.Errorf("Error retrieving details for AMI (%s): %s", ami, err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
if len(imageResp.Images) == 0 {
err := fmt.Errorf("Error retrieving details for AMI (%s), no images found", ami)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
image := imageResp.Images[0]
snapshotIds := []*string{}
// Add only those with a Snapshot ID, i.e. not Ephemeral
for _, device := range image.BlockDeviceMappings {
if device.Ebs != nil && device.Ebs.SnapshotId != nil {
ui.Say(fmt.Sprintf("Tagging snapshot: %s", *device.Ebs.SnapshotId))
resourceIds = append(resourceIds, device.Ebs.SnapshotId)
snapshotIds = append(snapshotIds, device.Ebs.SnapshotId)
}
}
// Convert tags to ec2.Tag format
ui.Say("Creating AMI tags")
amiTags, err := ConvertToEC2Tags(s.Tags, *ec2conn.Config.Region, sourceAMI, s.Ctx)
if err != nil {
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
ui.Say("Creating snapshot tags")
snapshotTags, err := ConvertToEC2Tags(s.SnapshotTags, *ec2conn.Config.Region, sourceAMI, s.Ctx)
if err != nil {
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
// Retry creating tags for about 2.5 minutes
err = retry.Retry(0.2, 30, 11, func() (bool, error) {
// Tag images and snapshots
_, err := regionconn.CreateTags(&ec2.CreateTagsInput{
Resources: resourceIds,
Tags: amiTags,
})
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == "InvalidAMIID.NotFound" ||
awsErr.Code() == "InvalidSnapshot.NotFound" {
return false, nil
}
}
// Override tags on snapshots
if len(snapshotTags) > 0 {
_, err = regionconn.CreateTags(&ec2.CreateTagsInput{
Resources: snapshotIds,
Tags: snapshotTags,
})
}
if err == nil {
return true, nil
}
if awsErr, ok := err.(awserr.Error); ok {
if awsErr.Code() == "InvalidSnapshot.NotFound" {
return false, nil
}
}
return true, err
})
if err != nil {
err := fmt.Errorf("Error adding tags to Resources (%#v): %s", resourceIds, err)
state.Put("error", err)
ui.Error(err.Error())
return multistep.ActionHalt
}
}
return multistep.ActionContinue
}
func (s *StepCreateTags) Cleanup(state multistep.StateBag) {
// No cleanup...
}
func ConvertToEC2Tags(tags map[string]string, region, sourceAmiId string, ctx interpolate.Context) ([]*ec2.Tag, error) {
var ec2Tags []*ec2.Tag
for key, value := range tags {
ctx.Data = &BuildInfoTemplate{
SourceAMI: sourceAmiId,
BuildRegion: region,
}
interpolatedValue, err := interpolate.Render(value, &ctx)
if err != nil {
return ec2Tags, fmt.Errorf("Error processing tag: %s:%s - %s", key, value, err)
}
log.Printf("Adding tag: \"%s\": \"%s\"", key, interpolatedValue)
ec2Tags = append(ec2Tags, &ec2.Tag{
Key: aws.String(key),
Value: aws.String(interpolatedValue),
})
}
return ec2Tags, nil
}