ceph-volume: fix regex usage in set_dmcrypt_no_workqueue

- Updated the regex pattern to `r'(\d+\.?)+'` to more accurately
  capture version numbers.

- Replaced `re.match` with `re.search` to properly match the cryptsetup
  version in the output.

- `re.match` only checks for a match at the beginning of the string,
   while `re.search` looks for a match anywhere in the string.

This fix ensures that the function correctly retrieves the
cryptsetup version from the output.

Fixes: https://tracker.ceph.com/issues/66393

Signed-off-by: Guillaume Abrioux <[email protected]>

Author: guits

src/ceph-volume/ceph_volume/tests/util/test_encryption.py

@@ -1,6 +1,44 @@
 from ceph_volume.util import encryption
-from mock.mock import patch
+from mock.mock import patch, Mock
 import base64
+import pytest
+
+
+class TestNoWorkqueue:
+    def setup_method(self):
+        encryption.conf.dmcrypt_no_workqueue = None
+
+    @patch('ceph_volume.util.encryption.process.call',
+           Mock(return_value=(['cryptsetup 2.7.2 flags: UDEV BLKID KEYRING' \
+                               'FIPS KERNEL_CAPI PWQUALITY '], [''], 0)))
+    def test_set_dmcrypt_no_workqueue_true(self):
+        encryption.set_dmcrypt_no_workqueue()
+        assert encryption.conf.dmcrypt_no_workqueue
+
+    @patch('ceph_volume.util.encryption.process.call',
+           Mock(return_value=(['cryptsetup 2.0.0'], [''], 0)))
+    def test_set_dmcrypt_no_workqueue_false(self):
+        encryption.set_dmcrypt_no_workqueue()
+        assert encryption.conf.dmcrypt_no_workqueue is None
+
+    @patch('ceph_volume.util.encryption.process.call',
+           Mock(return_value=([''], ['fake error'], 1)))
+    def test_set_dmcrypt_no_workqueue_cryptsetup_version_fails(self):
+        with pytest.raises(RuntimeError):
+            encryption.set_dmcrypt_no_workqueue()
+
+    @patch('ceph_volume.util.encryption.process.call',
+           Mock(return_value=(['unexpected output'], [''], 0)))
+    def test_set_dmcrypt_no_workqueue_pattern_not_found(self):
+        with pytest.raises(RuntimeError):
+            encryption.set_dmcrypt_no_workqueue()
+
+    @patch('ceph_volume.util.encryption.process.call',
+           Mock(return_value=([], [''], 0)))
+    def test_set_dmcrypt_no_workqueue_index_error(self):
+        with pytest.raises(RuntimeError):
+            encryption.set_dmcrypt_no_workqueue()
+
 
 class TestGetKeySize(object):
     def test_get_size_from_conf_default(self, conf_ceph_stub):

src/ceph-volume/ceph_volume/util/encryption.py

@@ -41,13 +41,13 @@ def set_dmcrypt_no_workqueue(target_version: str = '2.3.4') -> None:
 
     # This regex extracts the version number from
     # the `cryptsetup --version` output
-    pattern: str = r'\b\d+(\.\d+)*\b'
+    pattern: str = r'(\d+\.?)+'
 
     if rc:
         raise RuntimeError(f"Can't retrieve cryptsetup version: {err}")
 
     try:
-        cryptsetup_version = re.match(pattern, out[0])
+        cryptsetup_version = re.search(pattern, out[0])
 
         if cryptsetup_version is None:
             _output: str = "\n".join(out)