Fix NVMe Partition image on UEFI

The _manage_uefi code has a check where it attempts to just
identify the precise partition number of the device, in order
for configuration to be parsed and passed. However, the same code
did not handle the existence of a `p1` partition instead of just a
partition #1. This is because the device naming format is different
with NVMe and Software RAID.

Likely, this wasn't an issue with software raid due to how complex the
code interaction is, but the docs also indicate to use only whole disk
images in that case.

This patch was pulled down my one RH's professional services folks
who has confirmed it does indeed fix the issue at hand. This is noted
as a public comment on the Red Hat bugzilla.
https://bugzilla.redhat.com/show_bug.cgi?id=1954096

Story: 2008881
Task: 42426
Related: rhbz#1954096
Change-Id: Ie3bd49add9a57fabbcdcbae4b73309066b620d02
(cherry picked from commit fe825fa97ed1f3c9fa8b1461b63ab133fec20b72)

3 files changed, 51 insertions, 1 deletions

diff --git a/ironic_python_agent/extensions/image.py b/ironic_python_agent/extensions/image.py
index ec9775e4..7a7a55c4 100644
--- a/ironic_python_agent/extensions/image.py
+++ b/ironic_python_agent/extensions/image.py
@@ -293,7 +293,12 @@ def _manage_uefi(device, efi_system_part_uuid=None):
             # _get_partition returns <device>+<partition> and we only need the
             # partition number
             partition = _get_partition(device, uuid=efi_system_part_uuid)
-            efi_partition = int(partition.replace(device, ""))
+            try:
+                efi_partition = int(partition.replace(device, ""))
+            except ValueError:
+                # NVMe Devices get a partitioning scheme that is different from
+                # traditional block devices like SCSI/SATA
+                efi_partition = int(partition.replace(device + 'p', ""))
 
         if efi_partition:
             efi_partition_mount_point = os.path.join(local_path, "boot/efi")
diff --git a/ironic_python_agent/tests/unit/extensions/test_image.py b/ironic_python_agent/tests/unit/extensions/test_image.py
index 1bc79498..925ea6cb 100644
--- a/ironic_python_agent/tests/unit/extensions/test_image.py
+++ b/ironic_python_agent/tests/unit/extensions/test_image.py
@@ -2119,6 +2119,45 @@ efibootmgr: ** Warning ** : Boot0005 has same label ironic1\n
     @mock.patch.object(image, '_get_partition', autospec=True)
     @mock.patch.object(utils, 'get_efi_part_on_device', autospec=True)
     @mock.patch.object(os, 'makedirs', autospec=True)
+    def test__manage_uefi_nvme_device(self, mkdir_mock, mock_utils_efi_part,
+                                      mock_get_part_uuid, mock_efi_bl,
+                                      mock_execute, mock_dispatch):
+        mock_utils_efi_part.return_value = '1'
+        mock_get_part_uuid.return_value = '/dev/fakenvme0p1'
+
+        mock_efi_bl.return_value = ['\\EFI\\BOOT\\BOOTX64.EFI']
+
+        mock_execute.side_effect = iter([('', ''), ('', ''),
+                                         ('', ''), ('', ''),
+                                         ('', ''), ('', ''),
+                                         ('', '')])
+
+        expected = [mock.call('partx', '-u', '/dev/fakenvme0', attempts=3,
+                              delay_on_retry=True),
+                    mock.call('udevadm', 'settle'),
+                    mock.call('mount', '/dev/fakenvme0p1',
+                              self.fake_dir + '/boot/efi'),
+                    mock.call('efibootmgr'),
+                    mock.call('efibootmgr', '-c', '-d', '/dev/fakenvme0',
+                              '-p', '1', '-w',
+                              '-L', 'ironic1', '-l',
+                              '\\EFI\\BOOT\\BOOTX64.EFI'),
+                    mock.call('umount', self.fake_dir + '/boot/efi',
+                              attempts=3, delay_on_retry=True),
+                    mock.call('sync')]
+
+        result = image._manage_uefi('/dev/fakenvme0', self.fake_root_uuid)
+        self.assertTrue(result)
+        mkdir_mock.assert_called_once_with(self.fake_dir + '/boot/efi')
+        mock_efi_bl.assert_called_once_with(self.fake_dir + '/boot/efi')
+        mock_execute.assert_has_calls(expected)
+        self.assertEqual(7, mock_execute.call_count)
+
+    @mock.patch.object(os.path, 'exists', lambda *_: False)
+    @mock.patch.object(image, '_get_efi_bootloaders', autospec=True)
+    @mock.patch.object(image, '_get_partition', autospec=True)
+    @mock.patch.object(utils, 'get_efi_part_on_device', autospec=True)
+    @mock.patch.object(os, 'makedirs', autospec=True)
     def test__manage_uefi_wholedisk(
             self, mkdir_mock, mock_utils_efi_part,
             mock_get_part_uuid, mock_efi_bl, mock_execute,
diff --git a/releasenotes/notes/fix-nvme-partition-image-handling-b8487133a188fd32.yaml b/releasenotes/notes/fix-nvme-partition-image-handling-b8487133a188fd32.yaml
new file mode 100644
index 00000000..ee1cf085
--- /dev/null
+++ b/releasenotes/notes/fix-nvme-partition-image-handling-b8487133a188fd32.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fixes an error with UEFI based deployments where using a partition image
+    a NVMe device was previously failing due to the different device name
+    pattern.