fix installer image retag

deploy/arm64-installer/scripts/common.sh

@@ -342,21 +342,54 @@ install_docker_if_missing() {
 load_installer_images() {
   require_cmd docker
   shopt -s nullglob
-  local image
+  local image load_output desired_tag
   local found=0
   for image in "$INSTALLER_ROOT"/images/*.tar "$INSTALLER_ROOT"/images/*.tar.gz; do
     found=1
     log "loading docker image: $image"
     if [[ "$image" == *.gz ]]; then
-      gzip -dc "$image" | docker load
+      load_output="$(gzip -dc "$image" | docker load)"
     else
-      docker load -i "$image"
+      load_output="$(docker load -i "$image")"
+    fi
+    printf '%s\n' "$load_output"
+    desired_tag=""
+    case "$(basename "$image")" in
+      "${image_tar:-}")
+        desired_tag="${image_tag:-$RPKI_IMAGE}"
+        ;;
+      "${prometheus_image_tar:-}")
+        desired_tag="${prometheus_image:-$PROMETHEUS_IMAGE}"
+        ;;
+      "${grafana_image_tar:-}")
+        desired_tag="${grafana_image:-$GRAFANA_IMAGE}"
+        ;;
+    esac
+    if [[ -n "$desired_tag" ]]; then
+      ensure_loaded_image_tag "$desired_tag" "$load_output" "$image"
     fi
   done
   shopt -u nullglob
   (( found == 1 )) || warn "no image tar found under $INSTALLER_ROOT/images"
 }
 
+ensure_loaded_image_tag() {
+  local desired_tag="$1"
+  local load_output="$2"
+  local image_path="$3"
+  if docker image inspect "$desired_tag" >/dev/null 2>&1; then
+    return 0
+  fi
+  local loaded_ref=""
+  loaded_ref="$(printf '%s\n' "$load_output" | awk -F'Loaded image: ' '/Loaded image: / {print $2; exit}')"
+  if [[ -z "$loaded_ref" ]]; then
+    loaded_ref="$(printf '%s\n' "$load_output" | awk -F'Loaded image ID: ' '/Loaded image ID: / {print $2; exit}')"
+  fi
+  [[ -n "$loaded_ref" ]] || die "unable to determine loaded image reference for $image_path"
+  log "tagging loaded image for package use: source=$loaded_ref target=$desired_tag"
+  docker tag "$loaded_ref" "$desired_tag"
+}
+
 ensure_binfmt_if_needed() {
   require_cmd docker
   load_env