diff --git a/ironic_python_agent/tests/unit/test_utils.py b/ironic_python_agent/tests/unit/test_utils.py index fc683d22e..ae1b14a1b 100644 --- a/ironic_python_agent/tests/unit/test_utils.py +++ b/ironic_python_agent/tests/unit/test_utils.py @@ -22,6 +22,7 @@ import shutil import subprocess import tarfile import tempfile +import time from unittest import mock from ironic_lib import utils as ironic_utils @@ -877,6 +878,7 @@ class TestClockSyncUtils(ironic_agent_base.IronicAgentTest): self.assertEqual(0, mock_execute.call_count) +@mock.patch.object(utils, '_unmount_any_config_drives', autospec=True) @mock.patch.object(utils, '_booted_from_vmedia', autospec=True) @mock.patch.object(utils, '_check_vmedia_device', autospec=True) @mock.patch.object(utils, '_find_vmedia_device_by_labels', autospec=True) @@ -887,7 +889,8 @@ class TestCopyConfigFromVmedia(testtools.TestCase): def test_vmedia_found_not_booted_from_vmedia( self, mock_execute, mock_mount, mock_copy, - mock_find_device, mock_check_vmedia, mock_booted_from_vmedia): + mock_find_device, mock_check_vmedia, mock_booted_from_vmedia, + mock_unmount_config): mock_booted_from_vmedia.return_value = False mock_find_device.return_value = '/dev/fake' utils.copy_config_from_vmedia() @@ -896,10 +899,12 @@ class TestCopyConfigFromVmedia(testtools.TestCase): mock_copy.assert_not_called() mock_check_vmedia.assert_not_called() self.assertTrue(mock_booted_from_vmedia.called) + self.assertTrue(mock_unmount_config.called) def test_no_vmedia( self, mock_execute, mock_mount, mock_copy, - mock_find_device, mock_check_vmedia, mock_booted_from_vmedia): + mock_find_device, mock_check_vmedia, mock_booted_from_vmedia, + mock_unmount_config): mock_booted_from_vmedia.return_value = True mock_find_device.return_value = None utils.copy_config_from_vmedia() @@ -908,10 +913,12 @@ class TestCopyConfigFromVmedia(testtools.TestCase): mock_copy.assert_not_called() mock_check_vmedia.assert_not_called() self.assertFalse(mock_booted_from_vmedia.called) + self.assertTrue(mock_unmount_config.called) def test_no_files( self, mock_execute, mock_mount, mock_copy, - mock_find_device, mock_check_vmedia, mock_booted_from_vmedia): + mock_find_device, mock_check_vmedia, mock_booted_from_vmedia, + mock_unmount_config): mock_booted_from_vmedia.return_value = True temp_path = tempfile.mkdtemp() self.addCleanup(lambda: shutil.rmtree(temp_path)) @@ -925,10 +932,12 @@ class TestCopyConfigFromVmedia(testtools.TestCase): '/dev/something') mock_copy.assert_not_called() self.assertTrue(mock_booted_from_vmedia.called) + self.assertTrue(mock_unmount_config.called) def test_mounted_no_files( self, mock_execute, mock_mount, mock_copy, - mock_find_device, mock_check_vmedia, mock_booted_from_vmedia): + mock_find_device, mock_check_vmedia, mock_booted_from_vmedia, + mock_unmount_config): mock_booted_from_vmedia.return_value = True mock_execute.return_value = '/some/path', '' @@ -939,11 +948,13 @@ class TestCopyConfigFromVmedia(testtools.TestCase): mock_copy.assert_not_called() mock_mount.assert_not_called() self.assertTrue(mock_booted_from_vmedia.called) + self.assertTrue(mock_unmount_config.called) @mock.patch.object(os, 'makedirs', autospec=True) def test_copy( self, mock_makedirs, mock_execute, mock_mount, mock_copy, - mock_find_device, mock_check_vmedia, mock_booted_from_vmedia): + mock_find_device, mock_check_vmedia, mock_booted_from_vmedia, + mock_unmount_config): mock_booted_from_vmedia.return_value = True mock_find_device.return_value = '/dev/something' @@ -982,12 +993,14 @@ class TestCopyConfigFromVmedia(testtools.TestCase): mock.call(mock.ANY, '/etc/ironic-python-agent.d/ironic.conf'), ], any_order=True) self.assertTrue(mock_booted_from_vmedia.called) + self.assertTrue(mock_unmount_config.called) @mock.patch.object(os, 'makedirs', autospec=True) def test_copy_mounted( self, mock_makedirs, mock_execute, mock_mount, mock_copy, mock_find_device, mock_check_vmedia, - mock_booted_from_vmedia): + mock_booted_from_vmedia, + mock_unmount_config): mock_booted_from_vmedia.return_value = True mock_find_device.return_value = '/dev/something' path = tempfile.mkdtemp() @@ -1023,6 +1036,7 @@ class TestCopyConfigFromVmedia(testtools.TestCase): ], any_order=True) mock_mount.assert_not_called() self.assertTrue(mock_booted_from_vmedia.called) + self.assertTrue(mock_unmount_config.called) @mock.patch.object(requests, 'get', autospec=True) @@ -1143,3 +1157,20 @@ class TestCheckEarlyLogging(ironic_agent_base.IronicAgentTest): expected_calls = [mock.call('Early logging: %s', 'line 1.'), mock.call('Early logging: %s', 'line 2 message')] info.assert_has_calls(expected_calls) + + +class TestUnmountOfConfig(ironic_agent_base.IronicAgentTest): + + @mock.patch.object(utils, '_early_log', autospec=True) + @mock.patch.object(os.path, 'ismount', autospec=True) + @mock.patch.object(utils, 'execute', autospec=True) + @mock.patch.object(time, 'sleep', autospec=True) + def test__unmount_any_config_drives(self, mock_sleep, mock_exec, + mock_ismount, mock_log,): + mock_ismount.side_effect = iter([True, True, False]) + utils._unmount_any_config_drives() + self.assertEqual(2, mock_sleep.call_count) + self.assertEqual(2, mock_log.call_count) + mock_exec.assert_has_calls([ + mock.call('umount', '/mnt/config'), + mock.call('umount', '/mnt/config')]) diff --git a/ironic_python_agent/utils.py b/ironic_python_agent/utils.py index c5889e9bd..4bd5e7d51 100644 --- a/ironic_python_agent/utils.py +++ b/ironic_python_agent/utils.py @@ -311,18 +311,27 @@ def copy_config_from_vmedia(): ['config-2', 'vmedia_boot_iso']) if not vmedia_device_file: _early_log('No virtual media device detected') + _unmount_any_config_drives() return if not _booted_from_vmedia(): _early_log('Cannot use configuration from virtual media as the ' 'agent was not booted from virtual media.') + _unmount_any_config_drives() return # Determine the device mounted = _find_mount_point(vmedia_device_file) if mounted: + # In this case a utility like a configuration drive tool + # has *already* mounted the device we believe to be the + # configuration drive. _copy_config_from(mounted) else: with ironic_utils.mounted(vmedia_device_file) as vmedia_mount_point: + # In this case, we use a temporary folder and extract the contents + # for our configuration. _copy_config_from(vmedia_mount_point) + # As a last act, just make sure there is nothing else mounted. + _unmount_any_config_drives() def _get_cached_params(): @@ -944,3 +953,22 @@ def find_in_lshw(lshw, by_id=None, by_class=None, recursive=False, **fields): yield child if recursive: yield from find_in_lshw(child, by_id, recursive=True, **fields) + + +def _unmount_any_config_drives(): + """Umount anything mounted to /mnt/config + + As part of the configuration drive model, utilities like cloud-init + and glean leverage a folder at /mnt/config to convey configuration + to a booting OS. + + The possibility exists that one of the utilties mounted one or multiple + such folders, even if the configuration was not used, and this can + result in locked devices which can prevent rebuild operations from + completing successfully as as long as the folder is mounted, it is + a "locked" device to the operating system. + """ + while os.path.ismount('/mnt/config'): + _early_log('Issuing an umount command for /mnt/config...') + execute('umount', '/mnt/config') + time.sleep(1) diff --git a/releasenotes/notes/always-make-sure-config-drive-is-umounted-a3985bbb45e89051.yaml b/releasenotes/notes/always-make-sure-config-drive-is-umounted-a3985bbb45e89051.yaml new file mode 100644 index 000000000..e8e6dc173 --- /dev/null +++ b/releasenotes/notes/always-make-sure-config-drive-is-umounted-a3985bbb45e89051.yaml @@ -0,0 +1,8 @@ +--- +fixes: + - | + Fixes an issue where configuration drive volumes which are mounted + by the operating system could remain mounted and cause a lock to be + held, which may conflict with actions such as ``rebuild``. + The agent now always makes sure the folder used by Glean and Cloud-init + is not mounted.