[PATCH] Compress docker images with xz

[Josh Boyer]

Imagefactory supports gzip, bzip2, and xz compression formats.  Upstream
Docker prefers xz, so switch to using that.
---
 builder/kojid | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builder/kojid b/builder/kojid
index 8b1ea27..d59a0bb 100755
--- a/builder/kojid
+++ b/builder/kojid
@@ -3220,7 +3220,7 @@ class BaseImageTask(OzImageTask):
         @returns:
             a dict with some metadata about the image
         """
-        img_opts = {'compress': 'gzip'}
+        img_opts = {'compress': 'xz'}
         targ = self._do_target_image(self.base_img.base_image.identifier,
             'docker', img_opts=img_opts)
         return {'image': targ.target_image.data}
-- 
1.9.3