diff --git a/os_brick/initiator/connectors/nvmeof.py b/os_brick/initiator/connectors/nvmeof.py
index ee13c36d5..a140a7295 100644
--- a/os_brick/initiator/connectors/nvmeof.py
+++ b/os_brick/initiator/connectors/nvmeof.py
@@ -819,8 +819,13 @@ class NVMeOFConnector(base.BaseLinuxConnector):
         try:
             lines, err = self._execute(
                 *cmd, run_as_root=True, root_helper=self._root_helper)
+            source = lines.split('\n')[0]
+            # In a container this could be 'overlay', which causes the blkid
+            # command to fail.
+            if source == "overlay":
+                return None
             blkid_cmd = (
-                'blkid', lines.split('\n')[0], '-s', 'UUID', '-o', 'value')
+                'blkid', source, '-s', 'UUID', '-o', 'value')
             lines, _err = self._execute(
                 *blkid_cmd, run_as_root=True, root_helper=self._root_helper)
             return lines.split('\n')[0]
diff --git a/os_brick/tests/initiator/connectors/test_nvmeof.py b/os_brick/tests/initiator/connectors/test_nvmeof.py
index 95156ee4b..07512ce63 100644
--- a/os_brick/tests/initiator/connectors/test_nvmeof.py
+++ b/os_brick/tests/initiator/connectors/test_nvmeof.py
@@ -918,8 +918,10 @@ class NVMeOFConnectorTestCase(test_connector.ConnectorTestCase):
 
     @mock.patch.object(nvmeof.NVMeOFConnector, '_execute', autospec=True)
     def test_get_sysuuid_without_newline(self, mock_execute):
-        mock_execute.return_value = (
-            "9126E942-396D-11E7-B0B7-A81E84C186D1\n", "")
+        mock_execute.side_effect = [
+            ("/dev/sda1", ""),
+            ("9126E942-396D-11E7-B0B7-A81E84C186D1\n", "")
+        ]
         uuid = self.connector._get_host_uuid()
         expected_uuid = "9126E942-396D-11E7-B0B7-A81E84C186D1"
         self.assertEqual(expected_uuid, uuid)
@@ -930,6 +932,12 @@ class NVMeOFConnectorTestCase(test_connector.ConnectorTestCase):
         uuid = self.connector._get_host_uuid()
         self.assertIsNone(uuid)
 
+    @mock.patch.object(nvmeof.NVMeOFConnector, '_execute', autospec=True)
+    def test_get_sysuuid_overlay(self, mock_execute):
+        mock_execute.return_value = ("overlay\n", "")
+        uuid = self.connector._get_host_uuid()
+        self.assertIsNone(uuid)
+
     @mock.patch.object(utils, 'get_nvme_host_id',
                        return_value=SYS_UUID)
     @mock.patch.object(nvmeof.NVMeOFConnector,
diff --git a/releasenotes/notes/fix-host-uuid-warning-3814b7e47bde8010.yaml b/releasenotes/notes/fix-host-uuid-warning-3814b7e47bde8010.yaml
new file mode 100644
index 000000000..863fd3714
--- /dev/null
+++ b/releasenotes/notes/fix-host-uuid-warning-3814b7e47bde8010.yaml
@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    Fixes an warning seen when running in a container using ``overlayfs``.