diff -uNrp anaconda-21.48.22.121.orig/pyanaconda/packaging/yumpayload.py anaconda-21.48.22.121/pyanaconda/packaging/yumpayload.py

--- anaconda-21.48.22.121.orig/pyanaconda/packaging/yumpayload.py	2017-08-23 02:04:02.304040176 +0000

+++ anaconda-21.48.22.121/pyanaconda/packaging/yumpayload.py	2017-08-23 02:12:02.749029047 +0000

@@ -518,12 +518,16 @@ reposdir=%s

     @property

     def mirrorEnabled(self):

         with _yum_lock:

-            # yum initializes with plugins disabled, and when plugins are disabled

-            # _yum.plugins is a DummyYumPlugins object, which has no useful attributes.

-            if hasattr(self._yum.plugins, "_plugins"):

-                return "fastestmirror" in self._yum.plugins._plugins

+            # we just skip this on CentOS since we cant support it yet

+            if productName.startswith("CentOS"):

+              return False

             else:

-                return False

+              # yum initializes with plugins disabled, and when plugins are disabled

+              # _yum.plugins is a DummyYumPlugins object, which has no useful attributes.

+              if hasattr(self._yum.plugins, "_plugins"):

+                  return "fastestmirror" in self._yum.plugins._plugins

+              else:

+                  return False

     def getRepo(self, repo_id):

         """Return the yum repo object."""