yandex-export: tiny improvements (#9554)

post-processor/yandex-export/script.go

@@ -100,6 +100,7 @@ eval "$(jq -r '@sh "export YC_SK_ID=\(.access_key.id); export AWS_ACCESS_KEY_ID=
 echo "Check access to storage..."
 if ! aws s3 --endpoint-url=https://storage.yandexcloud.net ls > /dev/null ; then
   echo "Failed to access storage."
+  exit 1
 fi
 
 FAIL=0
@@ -119,6 +120,7 @@ done
 echo "Delete static access key..."
 if ! yc iam access-key delete ${YC_SK_ID} ; then
   echo "Failed to delete static access key."
+  FAIL=1
 fi
 
 echo "Set metadata key to 'cloud-init-status' to 'cloud-init-done' value"

website/pages/docs/post-processors/yandex-export.mdx

@@ -63,7 +63,7 @@ must have write access to both `s3://packer-export/my-exported-image.qcow2` and
       "type": "yandex",
       "folder_id": "b1g8jvfcgmitdrslcn86",
       "subnet_id": "e9bp6l8sa4q39yourxzq",
-      "zone": "ru-central1-a"
+      "zone": "ru-central1-a",
 
       "source_image_family": "ubuntu-1604-lts",
       "ssh_username": "ubuntu",
@@ -85,4 +85,5 @@ must have write access to both `s3://packer-export/my-exported-image.qcow2` and
       "keep_input_artifact": true
     }
   ]
-}```
+}
+```