Implementing device_aliases as described in docs (#945)

Implement missing device_aliases feature

The device_aliases key has been documented as part of disk_setup for
years, however the feature was never implemented. This implements the
feature as documented allowing usercfg (rather than dsconfig) to create
a mapping of device names.

This is not to be confused with disk_aliases, a very similar map but
existing solely for use by datasources.

LP: #1867532

1 files changed, 9 insertions, 0 deletions

diff --git a/tests/unittests/test_handler/test_handler_mounts.py b/tests/unittests/test_handler/test_handler_mounts.py
index e87069f6..69e8b30d 100644
--- a/tests/unittests/test_handler/test_handler_mounts.py
+++ b/tests/unittests/test_handler/test_handler_mounts.py
@@ -133,6 +133,15 @@ class TestSanitizeDevname(test_helpers.FilesystemMockingTestCase):
             disk_path,
             cc_mounts.sanitize_devname(disk_path, None, mock.Mock()))
 
+    def test_device_aliases_remapping(self):
+        disk_path = '/dev/sda'
+        self.mock_existence_of_disk(disk_path)
+        self.assertEqual(disk_path,
+                         cc_mounts.sanitize_devname('mydata',
+                                                    lambda x: None,
+                                                    mock.Mock(),
+                                                    {'mydata': disk_path}))
+
 
 class TestSwapFileCreation(test_helpers.FilesystemMockingTestCase):