Remove image-syncer amd64Only flag

cmd/image-syncer/README.md

@@ -16,7 +16,7 @@ Contents:
 
 ## Overview
 
-Image-syncer is used to copy container images between two registries.
+Image-syncer is used to copy container images between two registries. Sync the whole index if possible. Otherwise, sync a single image.
 It copies images **only when they are not present** in the target repository.
 The tool guarantees that **tags are immutable** in the target repository.
 That means that if the image tag is already present in the target registry, it is not overwritten by the new image.
@@ -94,8 +94,6 @@ As an input parameter, image-syncer takes a file having the following structure:
 
 - **source**: The source image to be copied. It can be an image name with a tag or a digest.
 - **tag**: The tag of the image in the target repository, which is required when the source uses digest to identify the image.
-- **amd64Only**: A boolean value that indicates if it's allowed to synchronize the image manifest instead of the image index.
-  This is required when the source image is not a multi-platform image.
 
 ```yaml
 images:
@@ -104,10 +102,8 @@ images:
 - source: "busybox@sha256:31a54a0cf86d7354788a8265f60ae6acb4b348a67efbcf7c1007dd3cf7af05ab"
   tag: "1.32.0-v1"
 - source: "bitnami/postgres-exporter:0.11.1-debian-11-r69"
-  amd64Only: true
 - source: "postgres@sha256:9d7ec48fe46e8bbce55deafff58080e49d161a3ed92e67f645014bb50dc599fd"
   tag: "v20230508-11.19-alpine3.17"
-  amd64Only: true
 ```
 
 ## Developer Guide
@@ -124,10 +120,6 @@ The image-syncer binary is responsible for synchronizing images between two regi
 The binary is released as a container image.
 See the [Dockerfile](https://github.com/kyma-project/test-infra/blob/main/cmd/image-syncer/Dockerfile) for the image-syncer binary.
 
-> [!WARNING]
-> The **amd64Only** field in the images list file allows syncing the image manifest instead of the image index.
-> The flag does not prevent syncing other platforms.
-
 #### Flags
 
 The image-syncer binary accepts flags to configure the synchronization process.

cmd/image-syncer/main.go

@@ -192,23 +192,17 @@ func SyncImages(ctx context.Context, cfg *Config, images *imagesync.SyncDef, aut
 			return err
 		}
 		log.WithField("image", img.Source).Info("Start sync")
-		if img.AMD64Only {
-			// sync whole index if possible, otherwise sync singular image
-			// we force users to set explicit info about single-arch images
-			var isIndex bool
-			isIndex, err = isImageIndex(ctx, img.Source)
-			if err != nil {
-				return err
-			}
-			if isIndex {
-				_, err = SyncIndex(ctx, img.Source, target, cfg.DryRun, auth)
-			} else {
-				imageType = "Image"
-				_, err = SyncImage(ctx, img.Source, target, cfg.DryRun, auth)
-			}
-		} else {
-			// sync whole index
+		// Sync the whole index if possible. Otherwise, sync a single image.
+		var isIndex bool
+		isIndex, err = isImageIndex(ctx, img.Source)
+		if err != nil {
+			return err
+		}
+		if isIndex {
 			_, err = SyncIndex(ctx, img.Source, target, cfg.DryRun, auth)
+		} else {
+			imageType = "Image"
+			_, err = SyncImage(ctx, img.Source, target, cfg.DryRun, auth)
 		}
 		if err != nil {
 			return err

pkg/imagesync/common.go

@@ -7,7 +7,6 @@ type SyncDef struct {
 
 // Image stores image location
 type Image struct {
-	Source    string
-	Tag       string `yaml:"tag,omitempty"`
-	AMD64Only bool   `yaml:"amd64Only,omitempty"`
+	Source string
+	Tag    string `yaml:"tag,omitempty"`
 }