Additionally support disk-type file in QA

Also perform QA tests for the file disk template. The main reason
is that testing gnt-instance modify --new-primary requires a
manual move of disks, which is most easily simulated for files.

Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>

qa/ganeti-qa.py

@@ -577,6 +577,8 @@ def RunInstanceTests():
      qa_instance.TestInstanceAddWithDrbdDisk, 2),
     ("instance-add-diskless", constants.DT_DISKLESS,
      qa_instance.TestInstanceAddDiskless, 1),
+    ("instance-add-file", constants.DT_FILE,
+     qa_instance.TestInstanceAddFile, 1),
   ]
 
   for (test_name, templ, create_fun, num_nodes) in instance_tests:

qa/qa-sample.json

@@ -170,6 +170,7 @@
     "node-failover": false,
 
     "instance-add-plain-disk": true,
+    "instance-add-file": true,
     "instance-add-drbd-disk": true,
     "instance-add-diskless": true,
     "instance-convert-disk": true,

qa/qa_instance.py

@@ -289,6 +289,13 @@ def TestInstanceAddWithDrbdDisk(nodes):
                    constants.DT_DRBD8)
 
 
+@InstanceCheck(None, INST_UP, RETURN_VALUE)
+def TestInstanceAddFile(nodes):
+  """gnt-instance add -t file"""
+  assert len(nodes) == 1
+  return _DiskTest(nodes[0].primary, constants.DT_FILE)
+
+
 @InstanceCheck(None, INST_UP, RETURN_VALUE)
 def TestInstanceAddDiskless(nodes):
   """gnt-instance add -t diskless"""