burnin: skip instance moves on single node

If we have only one node, instance moves fail, because it tries to move
the instance to itself. Skipping the operation, because in that case it
doesn't make sense.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

diff --git a/tools/burnin b/tools/burnin
index 7796785..395edbf 100755 (executable)
--- a/tools/burnin
+++ b/tools/burnin
@@ -865,8 +865,8 @@ class Burner(object):
       if opts.do_migrate and opts.disk_template == constants.DT_DRBD8:
         self.BurnMigrate()
 
-      if opts.do_move and opts.disk_template in [constants.DT_PLAIN,
-                                                 constants.DT_FILE]:
+      if (opts.do_move and len(self.nodes) > 1 and
+          opts.disk_template in [constants.DT_PLAIN, constants.DT_FILE]):
         self.BurnMove()
 
       if (opts.do_importexport and