Update hook-bootkit:

Update go.mod dependencies. Check for tink-worker
image and don't fail the image pull if it does
exist. With embedded images, the tink worker could
potentially already exist in the local Docker image
cache. And the image name could be something
unreachable via the network
(for example: 127.0.0.1/embedded/tink-worker).

Signed-off-by: Jacob Weinstock <jakobweinstock@gmail.com>

Author: jacobweinstock

images/hook-bootkit/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21-alpine AS dev
+FROM golang:1.22.6-alpine AS dev
 COPY . /src/
 WORKDIR /src
 RUN go mod download

images/hook-bootkit/go.mod

@@ -1,6 +1,8 @@
 module github.com/tinkerbell/hook/hook-bootkit
 
-go 1.17
+go 1.22
+
+toolchain go1.22.6
 
 require (
 	github.com/cenkalti/backoff/v4 v4.3.0

images/hook-bootkit/main.go

@@ -15,8 +15,8 @@ import (
 	"time"
 
 	"github.com/cenkalti/backoff/v4"
-	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/api/types/image"
 	"github.com/docker/docker/api/types/mount"
 	"github.com/docker/docker/api/types/registry"
 	"github.com/docker/docker/client"
@@ -127,13 +127,22 @@ func run(ctx context.Context, log logr.Logger) error {
 
 	authStr := base64.URLEncoding.EncodeToString(encodedJSON)
 
-	pullOpts := types.ImagePullOptions{
+	pullOpts := image.PullOptions{
 		RegistryAuth: authStr,
 	}
 	var out io.ReadCloser
 	imagePullOperation := func() error {
+		// with embedded images, the tink worker could potentially already exist
+		// in the local Docker image cache. And the image name could be something
+		// unreachable via the network (for example: 127.0.0.1/embedded/tink-worker).
+		// Because of this we check if the image already exists and don't return an
+		// error if the image does not exist and the pull fails.
+		var imageExists bool
+		if _, _, err := cli.ImageInspectWithRaw(ctx, imageName); err == nil {
+			imageExists = true
+		}
 		out, err = cli.ImagePull(ctx, imageName, pullOpts)
-		if err != nil {
+		if err != nil && !imageExists {
 			log.Error(err, "image pull failure", "imageName", imageName)
 			return err
 		}
@@ -143,18 +152,20 @@ func run(ctx context.Context, log logr.Logger) error {
 		return err
 	}
 
-	buf := bufio.NewScanner(out)
-	for buf.Scan() {
-		structured := make(map[string]interface{})
-		if err := json.Unmarshal(buf.Bytes(), &structured); err != nil {
-			log.Info("image pull logs", "output", buf.Text())
-		} else {
-			log.Info("image pull logs", "logs", structured)
-		}
+	if out != nil {
+		buf := bufio.NewScanner(out)
+		for buf.Scan() {
+			structured := make(map[string]interface{})
+			if err := json.Unmarshal(buf.Bytes(), &structured); err != nil {
+				log.Info("image pull logs", "output", buf.Text())
+			} else {
+				log.Info("image pull logs", "logs", structured)
+			}
 
-	}
-	if err := out.Close(); err != nil {
-		log.Error(err, "closing image pull logs failed")
+		}
+		if err := out.Close(); err != nil {
+			log.Error(err, "closing image pull logs failed")
+		}
 	}
 
 	log.Info("Removing any existing tink-worker container")