openstack: Add support for tagging new images.

builder/openstack/builder.go

@@ -142,6 +142,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 		&stepCreateImage{
 			UseBlockStorageVolume: b.config.UseBlockStorageVolume,
 		},
+		&stepUpdateImageTags{},
 		&stepUpdateImageVisibility{},
 		&stepAddImageMembers{},
 	}

builder/openstack/image_config.go

@@ -15,6 +15,7 @@ type ImageConfig struct {
 	ImageVisibility imageservice.ImageVisibility `mapstructure:"image_visibility"`
 	ImageMembers    []string                     `mapstructure:"image_members"`
 	ImageDiskFormat string                       `mapstructure:"image_disk_format"`
+	ImageTags       []string                     `mapstructure:"image_tags"`
 }
 
 func (c *ImageConfig) Prepare(ctx *interpolate.Context) []error {

builder/openstack/step_update_image_tags.go

@@ -0,0 +1,52 @@
+package openstack
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	imageservice "github.com/gophercloud/gophercloud/openstack/imageservice/v2/images"
+	"github.com/hashicorp/packer/helper/multistep"
+	"github.com/hashicorp/packer/packer"
+)
+
+type stepUpdateImageTags struct{}
+
+func (s *stepUpdateImageTags) Run(_ context.Context, state multistep.StateBag) multistep.StepAction {
+	imageId := state.Get("image").(string)
+	ui := state.Get("ui").(packer.Ui)
+	config := state.Get("config").(*Config)
+
+	if len(config.ImageTags) == 0 {
+		return multistep.ActionContinue
+	}
+	imageClient, err := config.imageV2Client()
+	if err != nil {
+		err = fmt.Errorf("Error initializing image service client: %s", err)
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+
+	ui.Say(fmt.Sprintf("Updating image tags to %s", strings.Join(config.ImageTags, ", ")))
+	r := imageservice.Update(
+		imageClient,
+		imageId,
+		imageservice.UpdateOpts{
+			imageservice.ReplaceImageTags{
+				NewTags: config.ImageTags,
+			},
+		},
+	)
+
+	if _, err = r.Extract(); err != nil {
+		err = fmt.Errorf("Error updating image tags: %s", err)
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *stepUpdateImageTags) Cleanup(multistep.StateBag) {
+	// No cleanup...
+}

website/source/docs/builders/openstack.html.md

@@ -127,6 +127,9 @@ builder.
     after creation. An image member is usually a project (also called the
     "tenant") with whom the image is shared.
 
+-   `image_tags` (array of strings) - List of tags to add to the image after
+    creation.
+
 -   `image_visibility` (string) - One of "public", "private", "shared", or
     "community".