inspect_utils, handle bracketed IPv6 redfish addr

If redfish_address is in brackets, unwrap it and check
that it is a valid IPv6 address. If that is the case use
the unwrapped address to avoid "Name or service not known".

Also add a unit test for normal_ipv6_as_url.

Closes-Bug: #2036455
Change-Id: I8df20e85e40d8321bd5f88c09fae33b6015bcf51

ironic/drivers/modules/inspect_utils.py

@@ -342,6 +342,9 @@ def _get_bmc_addresses(node):
         if '//' in address:
             address = urllib.parse.urlparse(address).hostname
 
+        # Strip brackets in case used on IPv6 address.
+        address = address.strip('[').strip(']')
+
         try:
             addrinfo = socket.getaddrinfo(address, None, proto=socket.SOL_TCP)
         except socket.gaierror as exc:

ironic/tests/unit/drivers/modules/test_inspect_utils.py

@@ -442,6 +442,12 @@ class GetBMCAddressesTestCase(db_base.DbTestCase):
             driver_info={'redfish_address': 'https://192.0.2.1/redfish'})
         self.assertEqual({'192.0.2.1'}, utils._get_bmc_addresses(node))
 
+    def test_normal_ipv6_as_url(self):
+        node = obj_utils.create_test_node(
+            self.context,
+            driver_info={'redfish_address': 'https://[2001:db8::42]/redfish'})
+        self.assertEqual({'2001:db8::42'}, utils._get_bmc_addresses(node))
+
     @mock.patch.object(socket, 'getaddrinfo', autospec=True)
     def test_resolved_host(self, mock_getaddrinfo):
         mock_getaddrinfo.return_value = [
@@ -474,6 +480,12 @@ class GetBMCAddressesTestCase(db_base.DbTestCase):
         mock_getaddrinfo.assert_called_once_with(
             'example.com', None, proto=socket.SOL_TCP)
 
+    def test_redfish_bmc_address_ipv6_brackets_no_scheme(self):
+        node = obj_utils.create_test_node(
+            self.context,
+            driver_info={'redfish_address': '[2001:db8::42]'})
+        self.assertEqual({'2001:db8::42'}, utils._get_bmc_addresses(node))
+
 
 class LookupCacheTestCase(db_base.DbTestCase):
 

releasenotes/notes/bug-2036455-edd0e97335579684.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fixes an issue where inspection would fail if an IPv6 address wrapped in
+    brackets is used for the redfish BMC address. See bug:
+    `2036455 <https://bugs.launchpad.net/ironic/+bug/2036455>`_.